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3
Surge Protection
Short Form Product Guide ............................................................... 4
Power Protection ................................................................................. 8
Signal Line Protection .....................................................................22
RJ45 Network protectors .......................................................................36
Additional Technical Information ................................................40
Surge Protection Tester ...................................................................43
Protocol selection tabel ..................................................................46
Surge protectors to protect electrical installations aiganst lightning and other overvoltage's
Safety of power supply
To ensure personnel and equipment safety, operating conditions of electrical installations have to be protected and monitored continuously. The physical quantities of lightning and other overvoltage's damaged electronic equipment and the electrical installations
NSG Spark Gap Diverters (Power protection Type 1) have high surge ratings suitable for point of entry protection in installations with highly exposed overhead LV power lines with no local transformer.
NSP1 Single Phase Surge Protectors (Power protection Type 2) are one port type 2 SPDs in accordance with EN61643-11. They are suitable for all TN, TT and IT systems. They provide all mode protection for sensitive electronics and a failsafe indication
NSP3 Three Phase Surge Protectors (Power protection Type 2) are one port type 2 SPDs in accordance with EN61643-11. They are suitable for all TN, TT and IT systems. They provide all mode protection for sensitive electronics and a failsafe indication.
NSSP Slimline Surge Protectors (power supplies protection) range of plug-in signal line protectors provide surge protection for power supplies with loads up to 6A.
NSL Slimline Signal Line Protectors (Monitoring and control protection) range of plug-in signal line protectors provide surge protection for most twisted pair signalling schemes.
NSLT Threaded Signal Line Protectors (Field instruments protection) range provide a means of protecting the signalling lines of field equipment. They are suitable for two, three and four wire instruments.
NSPT Surge Protection Tester (Multifunction Measuring) allows surge protection installers and maintainers to monitor and diagnose surge protection equipment on site.
Increasing requirements regarding the high availability of electrical installations, and more and more complex production and automation processes conflict with an increased use of power electronics. System reactions become a topic of increasing concern to both operators and suppliers. Therefore a good surge protection is necessary to protect the electrical installation and equipment. Novaris Surge protectors distributed by Bender are suitable for all TN, TT and IT systems. They provide all mode protection for sentitive eletronics. The Type 2 surge protectors provide a failsafe indication.
4
Power Quality and Energy Measurement
SurgeA surge, or transient disturbance, is a short temporary overvol-tage that can cause damage to electrical equipment. Surges have a very short duration with most of the energy dissipated within 1 millisecond. These over voltages can occur as a result of lightning discharges, electrical system switching or electro-static discharge. Other terms often used to describe a surge are ‘spike’, ‘transient overvoltage’, or ‘lightning impulse’.
Surge Protection DeviceSurge protection devices are designed to limit the surge exposure towards electrical and electronic equipment. The purpose of a surge protection devise is to provide an alternate, low impedance path for the surge current. This protects equip-ment from overcurrent degradation and dramatically reduces the voltage exposure.
Short Form Product GuideIntroduction
harmonic
Rated Impulse VoltageThe following table provides a list of standard impulse voltage withstand levels for 230/400V based electrical equipment. The table is sourced from IEC 60664-1.The rated impulse voltage of electrical equipment is the maximum transient voltage that the equipment is designed to withstand without insulation breakdown. The table relates to insulation breakdown, namely the withstand voltage bet-ween each line and earth. The line to line breakdown voltage, resulting in component damage, is generally much lower than this; typically for 230/400V mains powered equipment it is around 700-800V. When designing a surge protection scheme for a given site, it is important that the surge protection devise selection provides a residual voltage lower than the impulse voltage rating of the equipment being protected in all modes, namely line to line and line to earth.
Overvoltage Category Rated Impulse Voltage Equipment Examples
I 1500V
Sensitive electrical plug-in equipment. Example: Televisions, Computers, PLC Equip-ment, PABX, Uninterruptable Power Supplies,
Medical Equipment, Microcontroller based appliances, etc.
II 2500V General domestic fixed appliances, portable tools, etc.
III 4000V Fixed industrial installation switchgear or high reliability and/or availability equipment
IV 6000V Electricity meters and primary fusing and primary circuit breakers
5
Surge Types
Direct Lightning StrikesA direct strike occurs when a structure or an electrical service conductor is hit directly by a cloud to ground lightning strike. A direct strike surge is the strongest and most destructive of surge sources. The average lightning strike represents 30,000A (30kA) of current flow up to a possible maximum of 200,000A (200kA).
Lightning Indirect EffectsA lightning strike does not have to hit equipment or cabling directly for it to cause damage. The majority of current surges are caused by the indirect effects of the lightning strike. For example, by lightning striking a building containing electrical and electronic equipment.
Earth Potential RiseAs the energy from a cloud to ground lightning strike is dis-sipated to earth, a radiating field of earth potential is created due to the resistance of the ground. Sites or equipment groun-ded near to the strike point will rise to a much higher potential than sites or equipment further away. Any power or signal cabling between these sites will be used as a current path due to the high potential difference. This is why surge protection is a requirement for cables running between equipment with discrete earthing. In the example below, even though light-ning only strikes the building on the left, surge protection is required at both buildings.
LEMP EffectsDue to the high current and voltage present during a cloud to cloud or a cloud to ground strike, a ‘Lightning Electromagnetic Pulse’ (LEMP) is released into the atmosphere. This imposes a
surge onto signal and power cabling through induction of the magnetic field and capacitive coupling of the electric field. The energy resulting from the LEMP effect is much lower than the previous sources, but still affects sensitive equipment and long signal interconnects. As before, surge protection is required at both ends of the cable, that is at each building.
Switching SurgesSwitching surges occur when reactive electrical equipment such as capacitors or inductors are switched into and out of the grid. Switching surges are by far the most prominent source of surges to which equipment may be exposed. Swit-ching surges are generally quite low in energy but can still damage sensitive equipment and cause component degrada-tion leading to operational failure.
6
Risk Assessment
The level of protection recommended for a site is dependent on environmental factors affecting the potential surge exposure. A full risk assessment of a site can be obtained by applying the IEC 62305 series of standards which includes a systematic approach for the application of structural and electrical protection. The following is a simplified analysis of the recommendations for electri-cal protection.
Lightning Flash Density (Ng)Lightning flash density gives a statistical measure of lightning flashes per square kilometre per year (Ng). Obviously the risk of lightning related damage increases in areas with a higher lightning flash density. Approximately 70% of all lightning occurs in tropical regions with a total of 1.4 billion flashes per year.
Lightning flash density (Ng) recorded between 1995 and 2003
Source: NASA/GHRC/NSSTC Lightning Team
Environmental InfluencesThe location of the site and method of delivery of electrical services influences the risk of damage due to lightning activity. Selec-tion of the appropriate surge protection device (SPD) at the point of entry to the site will provide an effective solution for the given environmental risk. It is not economically feasible to implement a lightning protection system to cover 100% of all lightning events. A standard IEC62305 risk assessment aims to reduce the risk of economic loss to one event every 1000 years.
7
Simplified Risk Assessment
The following is a simplified risk assessment for point of entry protection selection based of the most influential environmental factors. A more detailed analysis can be achieved through a full IEC 62305 risk assessment.
Building has a structural lightning protection Ng between 4-15 or system or Ng greater than 15 Overhead power lines
Type 1 Protection recommended Type 2 80kA Protection recommended
Elevated and isolated building and Ng less than 4 and Ng less than 15 Underground cabling
Type 2 80kA Protection recommended Type 2 40kA Protection recommended
8
Power protection - Type 1
Type 1 (or EN61643-11 Class I) protection devices are designed for point of entry installations where there is a high risk of a direct strike. Buildings that utilise a form of structural protection provide a low resistance path for lightning current to ground and are therefore more likely to receive a direct strike. Buildings in areas with a lightning strike density (Ng) greater than 15 strikes per km2 per year are also more likely to receive a direct strike.
Power ProtectionNovaris offers both power protection and signal line protection devices. Part of the systematic approach to surgeprotection is to ensure that all power and signal lines entering or exiting a premises have surge protection applied to them. This defines a protec-tion boundary at the edge of structure.
Spark Gap TechnologyDue to the long duration and level of energy contained in a 10/350µs direct strike waveform, the protection components used to redirect the surge energy have to be very robust. The Bender Type 1 protection products utilise spark gap technology to provide a very low resistance path for the surge current. The disadvantage of spark gap technology is that the arc takes time to establish, resulting in a higher residual voltage (Up). It is recommended to install secondary MOV based surge protection (Type 2) at the distribution level to reduce the voltage exposure of sensitive equip-ment.
10/350 (Red waveform)The waveform that simulates a direct strike is the 10/350µs. 10µs is the length of time required to reach 90% of the maxi-mum current and 350µs is the length of time for the current flow to fall back to 50% of maximum. The 10/350µs waveform is intended to represent the worst case direct lightning strike and contains approximately 17 times the energy of an equiva-lent peak 8/20µs waveform.
0
50%
100%
20µs 350µs
time
curr
ent
9
Power protection - Type 2
Type 2(or EN61643-11 Class II) protection devices are designed to protect installations where a direct strike is unlikely to occur. Buildings that do not require structural lightning protection or buildings in low lightning regions are much less likely to receive a direct strike to the point of power entry on the building. Type 2 surge protection is required as secondary protection downstream of spark gap based Type 1 protection.
Metal Oxide Varistor TechnologyThe Metal Oxide Varistor’s (MOV) electrical properties are similar to those of a semi-conductor. The component is in a high impedance state when a voltage lower than the ‘clamping voltage’ rating is applied. The component instantaneously changes to a low impedance state when the ‘clamping voltage’ is exceeded. This re-directs a majority of the surge current away from the load whilst reducing the surge voltage exposure. The advantages of MOV technology are its lower residual voltage (Up), instantaneous reaction time and no follow on current (Ifi) tripping circuit breakers.
8/20 (Blue waveform)The waveform that simulates the attenuated indirect strike or switching surges is the 8/20µs. 8µs is the length of time required to reach 90% of the maximum current and 20µs is the length of time for the current flow to fall back to 50% of maxi-mum. The 8/20µs waveform represents the majority of surges to which a power system will be exposed.
0
50%
100%
20µs 350µs
time
curr
ent
Zn30
Zinc
65.39
O8
Oxygen
16.00
Power protection - Type 2 single and three phase
Type 2 (or EN61643-11 Class II) protection devices are designed to protect installations where a direct strike is unlikely to occur. Buildings that do not require structural lightning protection or buildings in low lightning regions are much less likely to receive a direct strike to the point of power entry on the building. Type 2 surge protection is required as secondary protection downstream of spark gap based Type 1 protection.
Metal EnclosuresDuring a surge the Metal Oxide Varistor (MOV) components change to a low impe-dance state to pass the surge current. The combination of this current and the residual MOV resistance can generate a substantial amount of heat. Additionally, temporary overvoltages can cause the MOVs to fail to a low impedance state where they start to conduct AC current, which also generates heat. To reduce the risk of heat damage from failed MOVs, Bender Type 2 surge protection devices are housed in substantial metal enclosures. This reduces the instantaneous heat exposure and diminishes the risk of burning.
Active AlarmsNovaris Type 2 surge protection devices utilise active alarm technology. This technology requires power from the incoming phases to activate the LED indication and alarm relay within the device. The advantage of active monitoring is that the alarms respond to multiple failures that could impede the surge protection installation.
Surge component monitoring: If a MOV segment degrades the segment LED will turn off and changes the alarm state, alerting the operator that the device needs to be replaced.
HRC fuse monitoring: A large surge or a short circuit failure of the MOV can cause the protection fuse to blow. The alarm monitors the continuity of the fuse which in turn monitors the SPD’s connection to the circuit.
Phase failure monitoring: The alarm and indication will change state in the case of a phase failure which can suggest a loose connection or more serious issues upstream.
10
NSG Spark Gap DivertersPower protection Type 1
NSG Spark Gap Diverters for point of entry protection at main switchboards where direct strike protection is required.
Multilayer Carbon Disc TechnologyCarbon disk spark gaps are a robust and proven technology designed to handle long duration surges. The low resistance design minimises the energy dissipation within the device.
Sealed EnclosureThe Novaris spark gap diverters are a sealed unit and do not exhaust hot ionised gas into the switchboard.
Note: It is highly recommended to install MOV based protection at the first layer distribution when using spark gaps for primary protection due to the arc establishment time of spark gap technology.
NSG 1 - 50 - 255 - [N]Product Series Neutral Phase Uc Iimp
NSG1-50-255
Dimensions
Standards
IEC 61643-11 : 2011IEEE C62.41.2 : 2002AS/NZS 1768 : 2007UL 1449 3rd edition
11
Type NSG1-50-255 NSGN-100-255
Electrical Specifications
Connection type Shunt
Modes of protection L-N N-PE
Phases 1 -
Nominal voltage U0 230V / 50Hz
Short circuit withstand level ISCCR 25 kA
Maximum backup fuse (gL/gG) 500 A -
L-N
Maximum continuous voltage Uc 255 V / 50 Hz -
Maximum discharge current (8/20 µs) Imax 120 kA -
Ligthning impulse current (10/350 µs) Iimp 50 kA -
Nominal discharge current (8/20 µs) In 50 kA -
Voltage protection level @ 3 kA (8/20µs) Up < 2000 V -
Voltage protection level @ I imp Up < 2000 V -
Respons time TA < 100 ns -
Temporary overvoltage (TOV) UT 334 V / 5 sec -
N-PE
Maximum continuous voltage Uc - 255 V / 50 Hz
Maximum discharge current (8/20 µs) Imax - 150 kA
Ligthning impulse current (10/350 µs) Iimp - 100 kA
Nominal discharge current (8/20 µs) In - 75kA
Voltage protection level @ 3 kA (8/20µs) Up - < 800 V
Voltage protection level @ I imp Up - < 1300 V
Respons time TA - < 100 ns
Temporary overvoltage (TOV) UT - 1200 V / 0,2 sec
Interrupting follow current @ Uc Ifi - 100 A
Earth leakage current - < 10 µA
Mechanical Specifications
Operating temperature / humidity -40 to +70°C/5 to 95 % non-condensing
Terminal capacity 35 mm²
Terminal screw torque 2.5 Nm
Environmental IP 20
Type system 1 phase 1 phase + N 3 phase 3 phase + N
Dimensional drawing A B C D
Device width 35,2 mm 70,4 mm 105,6 mm 140,8 mm
Device heigth 90 mm
Device depth 68 mm
Mounting TS35 DIN rail
Enclosure/colour Flame retardant Polyamide 6/Yellow
Weight 230 g 460 g 690 g 920 g
12
Distribution Transformer
Load
NSP3-40-275NSGNNSG1
PLC / SCADAMonitoring
L1
L2
L3
N
PE
Point of Building Entry
Protection Boundary
Three Phase NG > 15 or building with LPS ( LPS = Lightning Protection System)
> 10 m
Sub-board
How to use the NSG3-50-255-N example in a three phase system
Distribution Transformer
Load
NSP1-40-275NSGN
PLC / SCADAMonitoring
L
N
PE
Point of Building Entry
Protection Boundary
> 10 m
Sub-board
NSG1
Single Phase NG > 15 or building with LPS ( LPS = Lightning Protection System)
How to use the NSG1-50-255-N example in a single phase system
13
Ordering information
Useable for system Type Art. No.
TN, TT and IT NSG1-50-255 BG-50-255TN, TT NSGN-100-255 BG-100-255
Diagram / installation
Type of system NSG1-50-255 NSGN-100-255
1 phase IT 2 -
1 phase TN-S , TT 1 1
1 phase TN-C 1 -
3 phase TN-C 3 -
3 phase TN-S, TT 3 1
14
NSP1 Single Phase Surge DiverterPower protection Type 2
NSP1 single phase surge diverters for point of entry protection at distribution-boards in smal industrial and domestic applications.
All Mode ProtectionProtection is provided for all combinations of lines ensuring the maximum level of protection is archieved at all times.
Thermal SensingSustained overvoltages can cause components to overheat and degrade. Thermal sensing warms of this condition without disconnecting the protection.
LED Status Active DisplayThe LED display indicates phase status and normal operation when all LED's are lit. An extinguished LED indicates a component failure or thermal overload, also initiating the external alarm.
Safe Metal EnclosureNovaris power protections products are housed in safe, all metal enclosures. In the event of a prolonged overvoltage they will not catch fire or explode.
Standards
IEC 61643-11 : 2011IEEE C62.41.2 : 2002EN 61643-11 Type 2AS/NZS 1768 : 2007UL 1449 3rd edition
NSP1-40-275
NSP1-80-275
Dimensions
NSP 1 - 80 - 275 - [*]Product Series Options Phase Uc
NSP 1 - 40 - 275 - [*]
15
Type NSP1-40-275 NSP1-80-275
Electrical Specifications
Connection type Shunt
Modes of protection L-N , L-P, N-PE
Phases 1
Nominal voltage U0 230 V AC
Short circuit withstand level Isccr 25 kA
Maximum backup fuse (gL/gG) 160 A 315 A
L-N
Maximum continuous voltage Uc 275 V AC
Maximum load current -
Maximum discharge current (8/20µs) (L-N) Imax 50 kA 100 kA
Ligthning impulse current (10/350 µs) Iimp
Nominal discharge current (8/20µs) (L-N / N-PE) In 20 kA 40 kA
Maximum switchboard fault rating Isccr 25 kA
Voltage protection level @ 3 kA 8/20µs Up < 800 V
Voltage protection level @ In Up < 1300 V < 1700 V
Response time tA < 25ns
Temporary overvoltage (TOV) UT 334 V / 5 sec. (Withstand)
N-PETemporary overvoltage (TOV) Ur
Maximum continuous voltage Uc 255 V
Maximum discharge current (8/20µs) Imax 60 kA 60 kA
Ligthning impulse current (10/350 µs) Iimp -
Nominal discharge current (8/20µs) (L-N / N-PE) In 30 kA 30 kA
Voltage protection level @ 1 kV / µs Up < 900 V
Voltage protection level @ In Up < 2100 V
Response time tA < 100 ns
Temporary overvoltage (TOV) UT 1200 V / 0,2 sec & 442 V / 120 min
Follow current interrupt rating Ifi 100 A
Earth leakage current < 10 µA
Indication
Display LED status per phase
External alarm Active alarm standard
Display /Alarm function Power fail safe, thermal overload, SPDT voltage free contact
Alarm isolation 4 kV
Mechanical Specifications
Operating temperature / humidity -40 to +70°C/5 to 95 % non-condensing
Terminal capacity - power 6 - 16 mm²
Terminal capacity - alarm 0.5 - 2.5 mm²
Terminal screw torque - power 2.0 Nm
Terminal screw torque - alarm 0.5 Nm
Environmental / Location IP 20 / Indoors
Dimensional drawing A B
Device width 36 mm 54 mm
Device heigth 95 mm
Device depth 70 mm
Mounting TS35 DIN rail
Enclosure/colour Metal / Yellow
Weight 220 g 330 g
16
How to use the NSP1-80-275 and NSP1-40-275 example
Distribution Transformer
Load
NSP1-40-275NSGN
PLC / SCADAMonitoring
L
N
PE
Point of Building Entry
Protection Boundary
> 10 m
Sub-board
NSG1
Single Phase NG > 15 or building with LPS ( LPS = Lightning Protection System)
How to use the NSP1-40-275 example
Distribution Transformer
Load
NSP1-40-275NSP1-80-275
PLC / SCADAMonitoring
L
N
PE
Point of Building Entry
Protection Boundary
Single Phase Ng < 15 ; isolated elevated structure or overhead power lines
> 10 m
Sub-board
PLC / SCADAMonitoring
17
Ordering information
Useable for system Type Art. No.
TN, TT, IT NSP1-40-275 B61-40-275TN, TT, IT NSP1-80-275 B61-80-275
Diagram / installation
18
NSP3 Three Phase Surge DiverterPower protection Type 2
NSP3 Three phase surge diverters for point of entry protection at distribution-boards in smal industrial and domestic applications.
All Mode ProtectionProtection is provided for all combinations of lines ensuring the maximum level of protection is archieved at all times.
Thermal SensingSustained overvoltages can cause components to overheat and degrade. Thermal sensing warms of this condition without disconnecting the protection.
LED Status Active DisplayThe LED display indicates phase status and normal operation when all LED's are lit. An extinguished LED indicates a component failure or thermal overload, also initiating the external alarm.
Safe Metal EnclosureNovaris power protections products are housed in safe, all metal enclosures. In the event of a prolonged overvoltage they will not catch fire or explode.
Standards
IEC 61643-11 : 2011IEEE C62.41.2 : 2002EN 61643-11 Type 2AS/NZS 1768 : 2007UL 1449 3rd edition
NSP3-40-275
NSP3-80-275
Dimensions
NSP 3 - 80 - 275 - [*]Product Series Options Phase Uc
NSP 3 - 40 - 275 - [*]
19
Type NSP3-40-275 NSP3-80-275
Electrical Specifications
Connection type Shunt
Modes of protection L-N , L-P, N-PE
Phases 3
Nominal voltage U0 230 V AC
Short circuit withstand level Isccr 25 kA
Maximum backup fuse (gL/gG) 160 A 315 A
L-N
Maximum continuous voltage Uc 275 V AC
Maximum load current -
Maximum discharge current (8/20µs) (L-N) Imax 50 kA 100 kA
Ligthning impulse current (10/350 µs) Iimp
Nominal discharge current (8/20µs) (L-N / N-PE) In 20 kA 40 kA
Maximum switchboard fault rating Isccr 25 kA
Voltage protection level @ 3 kA 8/20µs Up < 800 V
Voltage protection level @ In Up < 1300 V < 1700 V
Response time tA < 25ns
Temporary overvoltage (TOV) UT 337 V / 5 sec. (Withstand)
N-PETemporary overvoltage (TOV) Ur
Maximum continuous voltage Uc 255 V AC
Maximum discharge current (8/20µs) Imax 60 kA 60 kA
Ligthning impulse current (10/350 µs) Iimp -
Nominal discharge current (8/20µs) (L-N / N-PE) In 30 kA 30 kA
Voltage protection level @ 1 kV / µs Up < 900 V
Voltage protection level @ In Up < 2100 V
Response time tA < 100 ns
Temporary overvoltage (TOV) UT 1200 V / 0,2 sec & 442 V / 120 min
Follow current interrupt rating Ifi 100 A
Earth leakage current < 10 µA
Indication
Display LED status per phase
External alarm Active alarm standard
Display /Alarm function Power fail safe, thermal overload, SPDT voltage free contact
Alarm isolation 4 kV
Mechanical Specifications
Operating temperature / humidity -40 to +70°C/5 to 95 % non-condensing
Terminal capacity - power 6 - 16 mm²
Terminal capacity - alarm 0.5 - 2.5 mm²
Terminal screw torque - power 2.0 Nm
Terminal screw torque - alarm 0.5 Nm
Environmental / Location IP 20 / Indoors
Dimensional drawing A B
Device width 72 mm 108 mm
Device heigth 95 mm
Device depth 70 mm
Mounting TS35 DIN rail
Enclosure/colour Metal / Yellow
Weight 410 g 700 g
20
Distribution Transformer
Load
NSP3-40-275NSP3-80-275
PLC / SCADAMonitoring
L1
L2
L3
N
PE
Point of Building Entry
Protection Boundary
Three Phase NG < 15 ; isolated elevated structere or overhead power lines
> 10 m
Sub-board
PLC / SCADAMonitoring
How to use the NSP3-80-275 and NSP3-40-275 example
Distribution Transformer
Load
NSP3-40-275NSGNNSG1
PLC / SCADAMonitoring
L1
L2
L3
N
PE
Point of Building Entry
Protection Boundary
Three Phase NG > 15 or building with LPS ( LPS = Lightning Protection System)
> 10 m
Sub-board
How to use the NSP3-40-275 example
21
Ordering information
Useable for system Type Art. No.
TN, TT and IT without neutral NSP3-40-275 B63-40-275TN, TT and IT without neutral NSP3-80-275 B63-80-275
Diagram / installation
22
Monitoring and control protection
The Novaris NSL range of signal line protectors provide multistage protection for most physical process control protocols. Their design utilises a gas discharge tube front end to provide 10kA of common mode protection with finer grade protection components delivering very low residual voltage during a surge.With an electrically sealed width of only 7mm per signal pair, the NSL enables economical use of cabinet real estate and also accommo-dates straightforward upgrades of existing feed through terminal block installations. The design is modular with 2 standard bases and a range of pluggable modules appropriate to the physical protocol being protected.The NSL utilises the DIN rail mount as a low impedance earth connection and provides Earth/Shield terminals for convenient equipment and shield grounding.
Signal Line Protection Novaris offers both power protection and signal line protection devices. Part of the systematic approach to surgeprotection is to ensure that all power and signal lines entering or exiting a premises have surge protection applied to them. This defines a protec-tion boundary at the edge of structure.
Base OptionsThe two base options in the NSL range are the NSLDIN/G (G base) and the NSLDIN/EC90 (EC90 base). The G base has a direct connection between the earth provided by the DIN rail, the earth terminals on the unit and the surge protection module earth. The EC90 base contains an isolation gas discharge tube between the shield terminals / surge protection module earth, and the DIN rail.
The EC90 base provides 2 functions: Ground Loop Isolation: Isolating the surge protection and shield from the ground
prevents current flow on the shield and stray voltages being injected onto the signal pairs.
Equipment Bonding: During a surge the Gas Discharge Tube will fire, bonding the earths of the two sites together through the larger shield conductor, reducing the earth potential difference between the sites. The recommended installation technique is to use G bases for protection of the central marshalling cabinet and EC90 bases for all remote equipment. This ensu- res the installation feeds from the same earth reference point.
23
Field instrument protection
The Novaris NSLT is a threaded signal line protector designed to be installed in a spare process connection gland within a field instru-ment enclosure. These devices are designed with 10kA of common mode protection and MOV based transverse mode components. This combination provides an excellent level of protection in a very convenient form factor for signals up to 200V.The NSLT protection devices are available in 2, 3 and 4 wire variants, suitable for the appropriate process control transmitter signal configuration.
The NSLT also supplies a shield connection wire which provides 2 functions: Ground Loop Isolation: Isolating the shield from the ground prevents current flow on the shield, reducing induced noise onto signal
pairs. Equipment Bonding: During a surge the Gas Discharge Tube will fire, bonding the earths of the two sites together through the larger
shield conductor, reducing the earth potential difference between the sites.
The NSLT is available with enclosures designed for M20 x 1.5 and ½” NPT glands.
Power supplies protectionThe Novaris NSSP6A is a series slimline ELV power protection device for load currents up to 6A. These SPDs are designed to provide 9.6kA of common mode and 4.8kA of transverse mode protection utilising MOV technology.
With an electrically sealed width of only 7mm per signal pair, the NSSP6A enables economical use of cabinet real estate and also accom-modates straightforward upgrades of existing feed through terminal block installations.
The NSSP6A utilises the DIN rail mount as a low impedance earth connection and provides earth terminals for convenient equipment grounding.
It is recommended to use an EC90 base for the field installation end of the cable to prevent ground loop issues.
24
NSSP Slimline Surge ProtectorsPower supplies protection
NSS6A-26-G
Product Series Base optionsIL Uc
NSSP 6A - 14 - [*]
Standards
ITU-T K.44: 2012AS / NZS 1768: 2007IEC61643-21: 2012AS/CA S008: 2010AS/NZS 4117: 1999UL 1449 3rd edition & UL 497B
Dimensions
High Current slimline surge protection devices (SPDs) provide surge protection for most twisted pair signaling schemes.
Load current up to 6 AThe NSSP6A series surge protectors complement the SL range for applications of load currents up to 6A. Typical applications may include power supplies, digital outputs and other low voltage requirements up to 6A.
Two different earthing optionsWith two different base options the NSSP6A protectors offer either direct earthing via DIN rail, for the most effective, low impedance earth connection (-G base) or a connection via GDT to the DIN rail, offering isolation under normal conditions and equipotential bonding during a surge (-EC90 base).
Slimline pluggable modulesThe plug-in design provides simple and rapid replacement and testing - no rewiring needed. This also provides a convenient method of field equipment isolation if required.
25
Type NSSP6A-14 NSSP6A-26 NSSP6A-38 NSSP6A-65 NSSP6A-130
Electrical Specifications
Connection type Series
Number of lines 1 pair
Modes of protection Transverse and common mode
Maximum continuous voltage (DC) Uc 14 V 26 V 38 V 65 V 170 V
Maximum continuous voltage (AC) Uc 11 V 20 V 30 V 50 V 130 V
Maximum discharge current (8/20µs) Imax 4.8 kA per line (9.6 kA common mode)
Maximum discharge current (10/350µs) Iimp -
impulse durability C2: 10 x 2.5 kA 8/20µs C2: 10 x 1 kA 8/20µs
Maximum load current IL 6 A
L-L Voltage protection level @ 1 kV / µs UP 35 V 55 V 75 V 130 V 450 V
L-L Voltage protection level @ 3 kA 8/20µs UP 70 V 95 V 105 V 210 V -
L-L Voltage protection level @ 100 V / s 20 V 35 V 55 V 90 V 220 V
L-PE Voltage protection level @ 1 kV / µs UP 35 V 55 V 75 V 130 V 450 V
L-PE Voltage protection level @ 3 kA 8/20µs UP 70 V 70 V 105 V 210 V -
L-PE Voltage protection level @ 100 V / s 20 V 20 V 55 V 90 V 220 V
AC durability 5 x 1 sec, 1 Arms
Overstressed fault mode Mode 3 (open circuit)
Response time tA < 5ns
Line resistance 0.02 Ω
Line inductance -
L-L capacitance UT 48 nF 28 nF 16 nF 4 nF 16 nF
L-PE Capacitance Uc 48 nF 28 nF 16 nF 4 nF 20 nF
Insertion loss @ 150 Ω < 0.5 dB (< 20 kHz)
3 dB Frequency @ 150 Ω fC 80 kHz
Mechanical Specifications
Operating temperature / humidity -40 to +70°C / 5 to 95 % non-condensing
Connection type / capacity 0.25 - 2.5 mm² cage clamp
Terminal screw torque 0.5 Nm
Environmental IP 20 / Indoor
Dimensional drawing A
Mounting TS35 DIN-rail
Earthing via G-base Direct earth connection via DIN-rail and screw terminals
Earthing via EC90-base 90 V isolation between DIN-rail earth and shield
Enclosure/colour Polycarbonate UL94 V-0 / black
Weight 35 g
26
How to use the NSSP6A-XX example
Switchboard / Cabinet
Field equipment
SSP6A xx protection supply voltage of eld instruments
Power Supply
NSSP6A-G
Cabinet earth
Cabinet earth
DINRAILNSSP6A-EC90
+ --
+ --
Cabinet
DINRAIL
Diagram / installation
27
How to use the Bases “G” and “EC 90”
* Base options
Ordering information
Type Signal Type * Base Option Art. No.
direct earting indirect earthing
NSSP6A-14 12 VDC - -G -EC90 B-SSP6A-14 - *NSSP6A-26 24 VDC 12 VAC -G -EC90 B-SSP6A-26 - *NSSP6A-38 36 VDC 24 VAC -G -EC90 B-SSP6A-38 - *NSSP6A-65 48 VDC 48VAC -G -EC90 B-SSP6A-65 - *
NSSP6A-130 110 VDC 110VAC -G -EC90 B-SSP6A-130 - *
If you need hazardous aera products, please contact us.
28
NSL Slimline Signal Line ProtectorsMonitoring and control protection
NSL-18-G
Product Series Base optionTop
NSL-7v5 - [*]
Process Control Protection for most twisted pair signalling schemes. Ideal for the protection of PLCs, fire and security systems, telecommunications and telemetry systems, railway signalling, SCADA and other industrial monitoring and control equipment.
Multistage failsafe designA high energy gas discharge tube (GDT) as primary protection plus series impedance and secondary components provide very robust surge protection with high transient suppression offering low let-through voltages.
Two different earthing optionsWith two different base options the NSL protectors offer either direct earthing via DIN rail, for the most effective, low impedance earth connection (-G base) or a connection via GDT to the DIN rail, offering isolation under normal conditions and equipotential bonding during a surge (-EC90 base).
Slimline pluggable modulesThe plug-in design provides simple and rapid replacement and testing - no rewiring needed. This also provides a convenient method of field equipment isolation if required.
Standards
ITU-T K.44: 2012AS / NZS 1768: 2007IEC61643-21: 2012AS/CA S008: 2010AS/NZS 4117: 1999UL 1449 3rd edition & UL 497B
Dimensions
29
Type NSL-7V5 NSL-18 NSL-36 NSL-68 NSL-PSTN SL-485 SL-RTD NSL-420
Electrical Specifications
Connection type Series
Number of lines 1 pair
Modes of protection Transverse and common mode
Maximum continuous voltage (DC) Uc 7 V 16 V 34 V 65 V 200 V 8 V 3 V 34 V
Maximum continuous voltage (AC) Uc 5 V 11 V 24 V 46 V 140 V 6 V 2 V -
Maximum discharge current (8/20µs) Imax 5 kA per line (10 kA common mode)
Maximum discharge current (10/350µs) Iimp 1.25 kA per line (2.5 kA common mode)
impulse durability C2: 10 x 5 kA 8/20 µsD1: 2 x 1 kA 10/350 µs
Maximum load current IL 250 mA
L-L Voltage protection level @ 1 kV / µs UP 15 V 30 V 45 V 80 V 220 V 35 V 15 V 40 V
L-L Voltage protection level @ 3 kA 8/20µs UP 15 V 30 V 45 V 80 V 220 V 35 V 15 V 40 V
L-L Voltage protection level @ 100 V / s 9 V 20 V 38 V 72 V 210 V 15 V 4 V 36 V
L-PE Voltage protection level @ 1 kV / µs UP 350 V 350 V 350 V 350 V 350 V 350 V 350 V 350 V
L-PE Voltage protection level @ 3 kA 8/20µs UP 600 V 600 V 600 V 600 V 600 V 600 V 600 V 600 V
L-PE Voltage protection level @ 100 V / s 230 V 230 V 230 V 230 V 330 V 230 V 230 V 230 V
AC durability 5 x 1 sec, 1 Arms
Overstressed fault mode Mode 3 (open circuit)
Response time tA < 5ns
Line resistance 8.2 Ω 8.2 Ω 8.2 Ω 8.2 Ω 8.2 Ω 3.9 Ω 3.9 Ω 12 Ω
Line inductance -
L-L capacitance UT 17 pF 18.5 pF 18.5 pF 17.7 pF 17.4 pF 18 pF 18 pF 17 pF
L-PE Capacitance Uc 4.5 pF
Insertion loss @ 150 Ω < 0.5 dB (< 1 MHz)
3 dB Frequency @ 150 Ω fC 60 Mhz
Mechanical Specifications
Operating temperature / humidity -40 to +70°C / 5 to 95 % non-condensing
Connection type / capacity 0.25 - 2.5 mm² cage clamp
Terminal screw torque 0.5 Nm
Environmental IP 20 / Indoor
Dimensional drawing A
Mounting TS35 DIN-rail
Earthing via G-base Direct earth connection via DIN-rail and screw terminals
Earthing via EC90-base 90 V isolation between DIN-rail earth and shield
Enclosure/colour Polycarbonate UL94 V-0 / black
Weight 35 g
30
How to use the NSL-XX- G in combination with the NSLT-XX example
Switchboard / Cabinet
SLTxx
DINRAIL
Field instrumentPLC / SCADA
SLxx-G
Cabinet earth
How to use the NSL-XX-G and NSL-XX-EC 90 example
Switchboard / Cabinet
DINRAIL
Field equipment
PLC / SCADA
SLxx-G
Cabinet earth
Cabinet earth
DINRAILSLxx-EC90
+ --
+ --
Cabinet
31
How to use the Bases “G” and “EC 90”
* Base options
Switchboard / Cabinet
DINRAIL
Field equipment
PLC / SCADA
SLxx-G
Cabinet earth
Cabinet earth
DINRAILSLxx-EC90
+ --
+ --
Cabinet
Ordering information
Type Signal Type * Base Option Art. No.
direct earting indirect earthing
NSL-7v5 5 V digital -G -EC90 B-SL-7v5 - *NSL-18 12 V digital -G -EC90 B-SL-18 - *NSL-36 24 V digital -G -EC90 B-SL-36 - * NSL-68 48V digital -G -EC90 B-SL-68 - *NSL-36 RS232 Data Highway -G -EC90 B-SL-36 - *
NSL-PSTN PABX PSTN -G -EC90 B-SL-PSTN - *NSL-485 RS485 RS422 - -EC90 B-SL-485 - *NSL-RTD RTD Applications Thermocouple -G -EC90 B-SL-RTD - *NSL-420 0 - 20 mA 4 - 20 mA -G -EC90 B-SL-420 - *
Diagram / installation
If you need hazardous aera products, please contact us.
32
NSLT Threaded Signal Line ProtectorsField instruments protection
NSLT-36-M20
Standards
ITU-T K.44: 2012AS / NZS 1768: 2007IEC61643-21: 2012UL 1449 3rd edition & UL 497B
NSLT x - [SIG] - [THREAD]Product Series Thread1 Pair / 3 / 4 Wire Voltage Options
Threaded instrument protectors provide surge protection for most twisted pair signalling schemes and are designed to be installed directly at the field equipment providing protection against induced surge and transients.
M20 and 1/2"NPT threadsThe threaded enclosure provides an easy installation by directly screwing into a free cable entry on the instrument. Common thread types such as M20 x 1.5 and 1/2" NPT threads are accomodated for. Other threads are available by request.
Multistage designThe multistage design provides a high energy gas discharge tube (GDT) as primary protection for common mode disturbances, commonly associated with lightning strikes and power system earth faults and a secondary metal-oxide varistor clamping stage across the signal lines. This combination provides very robust surge protection with high transient suppression and low let-through voltages. In addition protection is provided for cable screens which may be open circuit at the instrument.
SLT-Y AdapterWhere a field instrument has no free cable entry Novaris can supply a Y-piece adapter to accommodate the threaded instrument protector and cable gland. The SLT-Y is available in the same thread types as the SLT protectors.
Dimensions
33
Type NSLTx-7v5 NSLTx-18 NSLTx-36 NSLTx-68 NSLT4-RTD NSLT4-36-275
Electrical Specifications
Connection type Shunt
Number of linesx = 1 → 1 pairx = 3 → 3 linesx = 4 → 4 lines
4 lines1 pair Signal (S)
1 L & N Power (P)
Modes of protection Transverse and common mode
Maximum continuous voltage (DC) Uc 7 V 18 V 36 V 65 V 8 V 36 V (S) / 350 V (P)
Maximum continuous voltage (AC) Uc 5 V 14 V 30 V 50 V 6 V 30 V (S) / 275 V (P)
Maximum discharge current (8/20µs) Imax 5 kA per line (10 kA common mode)
Maximum discharge current (10/350µs) Iimp 1.25 kA per line (2.5 kA common mode)
impulse durability C2: 10 x 2.0 kA 8/20µsD1: 2 x 0.5 kA 10/350µs
C2: 10 x 0.5 kA 8/20µs
Maximum load current IL -
L-L Voltage protection level @ 1 kV / µs UP 45 V 50 V 75 V 100 V 45 V 75 V (S) / - (P)
L-L Voltage protection level @ 1 kA 8/20µs UP 70 V 75 V 110 V 160 V 70 V - (S) / - (P)
L-L Voltage protection level @ 100 V / s 25 V 30 V 60 V 80 V 25 V 55 V (S) / - (P)
L-PE Voltage protection level @ 1 kV / µs UP 350 V 350 V 350 V 350 V 350 V 350 V (S) / 900 V (P)
L-PE Voltage protection level @ 2 kA 8/20µs UP 530 V 530 V 530 V 530 V 530 V - (S) / - (P)
L-PE Voltage protection level @ 100 V / s 230 V 230 V 230 V 230 V 230 V 230 V (S) / 600 V (P)
Overstressed fault mode Mode 1 (SLT disconnect, line still operable)
Response time tA < 5ns
L-L capacitance UT 20 nF 10 nF 7 nF 1 nF 20 nF 7 nF (S) / 60 pF (P)
L-PE Capacitance Uc < 1 pF
Insertion loss @ 150 Ω -
3 dB Frequency @ 150 Ω fC 100 kHz
Mechanical Specifications
Operating temperature / humidity -40 to +85°C / 5 to 95 % non-condensing
Connection type / capacity 250 mm, 0.75 mm² flying leads
Terminal screw torque -
Environmental IP 67 installed
Dimensional drawing Given by thread size
Mounting Thread options: M20 x 1.5 or 1/2" NTP
Earthing Via lead; 90V isolation between earth and shield
Enclosure/colour Stainless steel
Weight 165 g
34
Switchboard / Cabinet
SLTxx
DINRAIL
Field instrumentPLC / SCADA
SLxx-G
Cabinet earth
How to use the NSLT-xx-xx example
Diagram / installation
35
Ordering information
Type Signal Type Thread Size Art. No.
M20 x 1.5 1/2" NPT
NSLTx-7v5 0-5 VDC analogue 5 V digital -M20 -N12 B-SLTx-7v5 -*NSLTx-18 0-12 VDC analogue 12 V digital -M20 -N12 B-SLTx-18 -*NSLTx-36 0-24 VDC analogue 4 - 20 mA -M20 -N12 B-SLTx-36 -*NSLTx-68 0-48 VDC analogue 48 V digital -M20 -N12 -B-SLTx-68 -*
NSLTx-RTD RTD applications Thermocouple -M20 -N12 B-SLTx-RTD -*NSLTx- 36-275 4 - 20 mA & Power supply -M20 on request B-SLTx-36 -275 -*
X = 1 pair, 3 lines or 4 lines
* = Thread Size
Examples art.no. complete: B-SLT1-18-M20; B-SLT3-68-N12 If you need hazardous aera products, please contact us.
36
NTP RJ45 Network ProtectorsNetwork protection
NTP-RJ45-1CAT6
NTP-RJ45-24CAT6
Standards
AS/NZS 4117: 1999AS/CA S008: 2010ITU-T K.44: 2012UL 1449 3rd edition & UL 497BAS / NZS 1768: 2007IEC 61643-21: 2012
Product Series Circuits Connector Number of Outlets
NTP - RJ45 - 1CAT6 -[*]
Cat6 and PoE RJ45 Network Surge Protection products are specifically designed for the protection of twisted pair Ethernet systems with a combination of rugged and fine grain protection elements.
10kA Front End Protection & Low Impedance Secondary ProtectionThe RJ45-CAT6 and RJ45-PoE protection products employ a 10kA Gas Discharge Tube per signal pair to dissipate the energy associated with large common mode surges.The silicon based secondary protection element used on each signal pair provides exceptional protection for your equipment whilst allowing network speeds up to Gigabit/1000BaseT.
PoE, PoE+, High Power PoE and beyondThe Novaris PoE protection devices are designed to handle up to 1 A of current per signal pair at up to 80VDC. This combination allows for Gigabit PoE systems with 4 pair power up to an outstanding 160W.
UTP and STP cabling compatibleNovaris network protection products utilise shield pass through connectors and metal bodies to allow for uninterrupted shielded network spans. The RJ45-1CAT6-EC90 option is necessary for earth isolation at the remote end of a network. This prevents current loops from appearing on the network shield.
Dimensions
37
Type RJ45-1CAT6 / 1PoE RJ45-24CAT6 / 24PoE
Electrical Specifications
Connection type Series
Number of lines 1 x RJ45 / 4 pairs & shield
Modes of protection Transverse and common mode
Maximum continuous voltage (DC) Uc 6 V
Maximum continuous voltage (AC) Uc 4 V
Maximum PoE voltage (DC) 80 V
Maximum discharge current (8/20µs) Imax 5 kA per line (10 kA common mode)
Maximum discharge current (10/350µs) Iimp 1 kA per line (2 kA common mode)
impulse durability C2: 10 x 2.0 kA 8/20µsD1: 2 x 0.5 kA 10/350µs
Maximum load current IL 1 A per common pair
L-L Voltage protection level @ 1 kV / µs UP 20 V
L-L Voltage protection level @ 100 V / s 9 V
L-PE Voltage protection level @ 1 kV / µs UP 350 V
L-PE Voltage protection level @ 1 kA 8/20µs UP 500 V
L-PE Voltage protection level @ 100 V / s 230 V
AC durabillity 1 A rms, 5 x 1 sec.
Overstressed fault mode Mode 3 (open circuit)
Response time tA Instantaneous
Line resistance 0.1 Ω
Line inductance 0.2 µH
L-L capacitance UT 8 pF @ 1MHz
L-PE Capacitance Uc 1.5 pF @ 1 MHz
Attenuation @ 220 Mhz (TIA CAT6 limit) 1.7 dB (28,9)
NEXT @ 250 Mhz (TIA CAT6 limit) 35.8 dB (35.5)
ReturnLoss@ 250 Mhz (TIA CAT6 limit) 11.2 dB (0.0)
Mechanical Specifications
Operating temperature / humidity -40 to +85°C / 5 to 95 % non-condensing
Connection type / capacity RJ45 Socket
Terminal screw torque -
Environmental IP 20 / indoor
Dimensional drawing B A
Mounting Inline / TS35 DIN-rail
Earthing Cable / TS35 DIN-rail
Enclosure/colour Metal /Yellow
Weight 200 g 2000 g
38
Patch / Server -cabinet
Network protection
Remote device
NTP-RJ45-1CAT6
NTP-RJ45-24CAT6
Network Switch
How to use the NTP-RJ45-24CAT6 and NTP-RJ45-1CAT6 example
How to use the NTP-RJ45-1CAT6 example
Patch / Server -cabinet
Network protection
Network Switch
NTP-RJ45-1CAT6Remote device
NTP-RJ45-1CAT6
39
Ordering information
Type Central Switch Remote Installation Point to Point link Art. No.
NTP-RJ45-1CAT6 / 1PoE * 10/100/1000T 10/100/1000T BUTP-CAT6NTP-RJ45-1CAT6 / 1PoE * 802.11 at PoE 802.11 at PoE BUTP-CAT6
NTP-RJ45-24CAT6 / 24 PoE 10/100/1000T BUTP-24CAT6NTP-RJ45-24CAT6 / 24 PoE 802.11 at PoE BUTP-24CAT6
* Din-Rail Mounting kit included, Isolating Earth connection is ordering option -EC90
40
Lead Length
The performance of a shunt connected (in parallel with load) surge protection device is highly dependent on the installation practices used. The residual voltage of all shunt connected surge protection devices is measured directly at the terminals of the device during testing. This gives a relative gauge of performance but does not reflect the device’s installed performance.
The length of wire used to connect the surge diverter to the power feed needs to be kept as short as physically possible during installa-tion to reduce the voltage drop on either side of the diverter. The resistance of the cable generates a small part of this voltage drop but the majority is caused by the inductance of the cable (between 0.5-1.5uH per meter).
The voltage drop due to this inductance can be calculated using the following formula: V=L × di/dt
Additional Technical information
Keeping the connecting lead lengths as short as possible will ensure the surge protection installation is operating optimally.
Where the voltage drop across the cable equals the inductance multiplied by the change in current over time. While the induc-tance of the cable is very small, during a surge the change in current over time is extremely large.The example above shows a relatively small 9kA surge with a change in current on the rising edge of 1kA/us or in SI units 1,000,000,000 Amps/second.For the above surge we see a voltage drop of 700V per meter of cable in addition to the SPDs residual voltage.
41
Conversely HRC fuses contain a flat strip of current limiting metal which melts when the current exceeds the threshold rating. This results in a level of inductance pro-portional to a wire conductor the length of the fuse and fitting. Bender Type 2 SPDs have active alarm monitoring which monitors the state of the HRC fuse as well as the surge protection components.
The maximum fuse rating of a Bender Power SPD is provided in the technical datas-heet and on the product label. It is recommended to select a fuse rating that is no higher than this maximum and 30% lower than the rating of the upstream breaker or fuse. This is to ensure that in the unlikely event of surge protection failure, that the surge protection fuse blows and not the upstream breaker. This secures the site’s power delivery, even in the event of a SPD failure.
Overcurrent Protection
Bender only recommends the use of HRC fuses for overcurrent protection of their shunt (parallel) connected surge protection devices. Circuit breakers are designed with a coil that acts as an electromagnet. This switches the circuit breaker when the load current exceeds the threshold rating. The coil has a relatively large level of inductance which when exposed to the change in current during a surge, creates a substantial voltage drop.
Surge Protection Coordination
The performance of a surge protection scheme for a site is greatly enhanced when multiple stages of surge protection are used. Bender recommends at least 2 stages of protection, especially for impulse category 1 equipment which is designed to withstand an impulse of only 1.5kV. The first benefit of multiple surge protection stages is SPD coordination. When the high voltage of the surge is applied to the surge protection device it changes from a high impedance state to a low impedance state. The residual impedance combined with the current passing through the device, or the spark over voltage, determine the surge protector’s residual voltage. The point of entry device passes the majority of the surge current due to the impedance of the wire separating each stage of SPDs. Because the secondary SPD passes less current, the residual voltage is less. This ensures the residual voltage will be less than the impulse category of the equipment especially for surges higher than the nominal surge current (In) of the SPD.
Pointof
EntrySPD
2ndLevelSPD Lo
ad> 10m
The other benefit of multiple stages of protection is redundancy. If the point of entry protection device fails, the secondary pro-tection device will keep the circuit protected. This means the equipment is not exposed while the primary protection is replaced.
42
A common mode surge is one that appears as a voltage on all lines with respect to earth. These generally cause catastrophic breakdown between the equipment and its earth.Earth potential rises and induced voltages are made up predominantly of the common mode component. All surge types gene-rally have most of their energy in the common mode. This is why Bender products focus most of the protection energy to protect against common mode surges. A transverse mode surge appears as a voltage difference between the incoming lines. This is what causes damage to the input stages of electronic equipment as the electrical load appears across these incoming lines. The transverse mode component of the surge is generally a lower energy component caused by loading imbalances during a surge and switching surges. Protecting the input stage is where the low residual voltage of the Bender surge protection series is important.
Common Mode vs Transverse Mode
There are 2 modes of surge that Bender SPDs are designed to protect against. They are common mode and transverse mode. The effects of a surge in the field are a combination of these two modes.
Signal Line Protection – Protecting both ends
The main types of surge affecting signal line equipment are earth potential differences and induced surges. The major component in these surges is a common mode difference bet-ween the lines and earth. To protect against this the protection device provides a low impedance path that reacts at a voltage lower than the insulation breakdown voltage of the equip-ment. If only a single SPD is installed, the surge exposure will increase because of this lower voltage reaction.
L or L1
N or L2
Earth
Common Mode Transverse Mode
By installing surge protection at both ends of the signal cable: The surge current has a clear path to ground at both ends The effective protection on the cable is doubled The shield wire can be used as a temporary equipotential bond during the surge The equipment at both ends is effectively protected due to their proximity to the SPD.
44
NSPT Surge Protection TesterMultifunction Measuring
The NSPT Surge Protection Tester allows surge protection installers and maintai-ners to monitor and diagnose surge protection equipment on site. The NSPT-02 uses an auto-range function to accurately determine the clamping voltage of voltage limiting products and the firing voltage of voltage switching products. The NSPT-02 is also a multifuction device that supports insulation resistance, continuity, voltage and diode testing. Test results are displayed on a 2 x 16 character display.
Type NSPT - 02
MOV Test
Measuring range 5 -- 1020 V DC
Voltage Accuracy ± 3%
GDT Test
Measuring range 5 -- 1020 V DC
Voltage Accuracy ± 3%
Voltmeter
DC Voltage 0 -- 950 V
AC Voltage 0 -- 700V
Resolution 1V
Voltage Accuracy ± 3%
Insulation Resistance
Test voltage 250, 500, 1000V
Measuring Ranges250V: 0.2MΩ -- 2GΩ500V: 0.2MΩ -- 4GΩ
1000V: 0.2MΩ -- 8GΩ
Accuracy 0.2MΩ - 4GΩ : ± 3%4GΩ -- 8GΩ : ± 5%
Short Circuit Current 1.2mAPolarisation Index (PI) on all ranges
Detective Absorbtion Ratio (DAR) on all ranges
KΩ Test
Ranges 1 -- 400kΩ
Short Circuit Test Current ≥ 1.3mA
Standards
EN 61010-1 CATIII 600 VEN 61326-1
NSPT-02
Product Series Version
NSPT - 02
45
Ordering information
Type Art. No.
NSPT-02 B-SPT-02
Type NSPT - 02
Continuity
Ranges0.01 -- 100Ω100 -- 300Ω
300 -- 1999Ω
Accuracy0.01 -- 100Ω : ± 1.0%100 -- 300Ω : ± 1.5%
300 -- 1999Ω : ± 2.0%
Auto Null up to 5Ω
Buzzer up to 3Ω
Diode Test
Test Voltage 5V DC
Max Test Current 1.5 mA
Resolution 0.1V
Measurement Voltage 0 -- 4.5V
Accuracy ± 3%
General
Fuse 500mA 250V Fast Blow
Display 2 Line x 16 Character LCD
Dimensions 205 (L) x 90 (W) x 55 (D)
Weight 1.5kG
Power Source 1.5V AA x 6
Storage Temperature -20˚C to 70˚C
Accessories
Test LeadsFuse (0.5A 250V)Heavy Duty Case
Instruction ManualBatteries
46
Protocol Selection Table Novaris offers signal line protection devices for many different communication and signal protocols.Use the table below to know which protectors must be used for a good surge protection.
Selection table
Protocol Signal Bender Surge protector
I/O ± 5 VDC, < 250kHz NSL7v5-G NSLT1-7v5
I/O ± 12 VDC, < 250kHz NSL18-G NSLT1-18
I/O ± 24 VDC, < 250kHz NSL36-G NSLT1-36
I/O 0-20mA / 4-20mA NSL420-G NSLT1-36
I/O RS-232 NSL-DH
I/O RS-422 NSL485-EC90 (x2)
I/O RS-452 NSL485-EC90 (x2)
I/O RS-485 NSL485-EC90
I/O 1-Wire NSL485-EC90
Protocol Signal Bender Surge protector
10/100/1000BaseT Ethernet NTP-RJ45-xCAT6
AS-i 32 VDC 1-pair NSL36-G NSLT1-36
BACnet ARCNET / Ethernet / BACnet/IP NTP-RJ45-xCAT6
BACnet RS-232 NSL36-G
BACnet RS-485 NSL485-EC90
BitBus RS-485 NSL485-EC90
CAN Bus (Signal) 5 VDC 1-Pair NSL485-EC90
C-Bus 36 VDC 1-pair NSSP6A-38
CC-Link/LT/Safety RS-485 NSL485-EC90
CC-Link IE Field Ethernet NTP-RJ45-xCAT6
CCTV Power over Ethernet NTP-RJ45-xPoE
DALI Digital Serial Interface NSL36-G NSLT1-36
Data Highway/Plus RS-485 NSL485-EC90
DeviceNet (Signal) 5 VDC 1-Pair NSL7v5-G NSLT1-7v5
DF1 RS-232 NSL36-G
DirectNET RS-232 NSL36-G
DirectNET RS-485 NSL485-EC90
Dupline (Signal) 5 VDC 1-Pair NSL7v5-G NSLT1-7v5
Dynalite DyNet NTP-RJ45-xCAT6
EtherCAT Ethernet NTP-RJ45-xCAT6
Ethernet Global Data Ethernet NTP-RJ45-xCAT6
Ethernet Powerlink Ethernet NTP-RJ45-xCAT6
47
Protocol Signal Bender Surge protector
FIP Bus RS-485 NSL485-EC90
FINS Ethernet NTP-RJ45-xCAT6
FINS RS-232 NSL36-G
FINS DeviceNet (Signal) NSL7v5-G NSLT1-7v5
FOUNDATION Fieldbus H1 32 VDC 1-pair NSSP6A-38-G NSLT1-36
FOUNDATION Fieldbus HSE Ethernet NTP-RJ45-xCAT6
GE-SRTP Ethernet NTP-RJ45-xCAT6
HART 4-20mA + HF Data NSL36-G
HostLink RS-232 NSL36-G
HostLink RS-422 NSL485-EC90 (x2)
Interbus RS-485 NSL485-EC90
ISDN PSTN NSL-PSTN NSL-iSwitch
KNX TP0/1 30 VDC 1-pair NSL36-G NSLT1-36
KNXnet/IP Ethernet NTP-RJ45-xCAT6
MODBUS RS-485 NSL485-EC90
MODBUS TCP Ethernet NTP-RJ45-xCAT6
P-Net RS-485 NSL485-EC90
PieP Ethernet NTP-RJ45-xCAT6
Power over Ethernet Power over Ethernet NTP-RJ45-xCAT6
Process Bus (P-Bus) RS-485 NSL485-EC90
Profibus DP/FMS RS-485 NSL485-EC90
Profibus PA 32 VDC 1-pair NSL36-G NSLT1-36
Profinet IO Ethernet NTP-RJ45-xCAT6
PSTN POTS NSL-PSTN NSL-iSwitch
S-Bus 32 VDC 1-pair NSL36-G NSLT1-36
Sercos III Ethernet NTP-RJ45-xCAT6
Sinec H1 Ethernet NTP-RJ45-xCAT6
SynqNet Ethernet NTP-RJ45-xCAT6
TTEthernet Ethernet NTP-RJ45-xCAT6
xDSL PSTN NSL-PSTN NSL-iSwitch
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BENDER Group
Bender Benelux B.V.Takkebijsters 54 • NL-4817 BL Breda • NederlandTel.: +31 (0)76 5878713 • Fax: +31 (0)76 5878927E-Mail: [email protected]