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8/2/2019 WDB Operation Manual
http://slidepdf.com/reader/full/wdb-operation-manual 1/14
—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 1 - -
Company Profile
Founded in 1979, Zhejiang Kuixing Electrical Co., Ltd. (also Cangnan Automated Instrument General Plant) is an integrated
corporation engaging in research, production and sales of electrical products. The Company sits at the boundary of Zhejiang and
Fujian, by the shore of East China Sea and aside National Highway 104, very advantageous in geographical location and convenient
in transportation. Over more than 20 years, the Company has established a close cooperation relationship with several institutes and
colleges, including Design and Research Institute of Electric Drive - Tianjin, Zhejiang University, No.753 Institutes of China State
Shipbuilding Corporation and Fenghua Research Institute of Computer, to make innovations together. To date, a high-tech
development team centered on state-level researchers and senior engineers has been formed in the Company, and the technical
personnel take up 42.5% of total employees. The Company now is turning into a knowledge-intensive enterprise and is producing
high-tech products.
The main products of the Company include intelligent LV motor protector, M&C device for integrated motor protection,
MV/HV integrated microcomputer-protected M&C device, multifunctional voltameter and DC breaker ampere-time characteristic
products, which are widely applied in industries such as petroleum, chemicals, electrical, metallurgy, coal, light industry, municipal
construction and textile. Full automation in production and intelligent management are realized. And the Company is spreading its
reputation among the Chinese customers.
Products that have to comply with China Compulsory Certification (CCC) are in compliance with requirements of CCC, and
those outside the range of CCC are identified and certified by state and provincial departments and institutes. The Company has been
awarded with certificate of ISO9001 Quality System; as such quality management is standardized.
The Company advocates a business philosophy of “unity, innovation, high-efficiency and integrity”, and a business objective of
“survival by quality, development through science and technology, making profit through management, and all serving for users”.
“Your satisfaction is our commitment”. Kuixing Electrical sincerely welcomes all customers, old and new, to share opinion on
development. Let’s create a bright future together.
8/2/2019 WDB Operation Manual
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—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 2 - -
1. General
WDB series microcomputer-monitored motor protector, a new generation intelligent integrated device for protection,
monitoring and control of LV asynchronous motor and increased-safety motor, is applicable in AC380V, AC660V LV system. In
addition to advanced motor protective and monitoring functions, this protector also provides major information such as records of operation and trip, and nominal parameters, and it is designed in a fieldbus structure, greatly facilitating the modern equipment
management. It has a vast application in industries such as petroleum, chemicals, electrical, metallurgy, coal, light industry, municipal
construction and textile.
Comply with the following standards: GB3836.3-200, GB14048.4-2003, IEC255
2. Characteristics
“tE time protection” complies with Chinese national standard (GB3836.3-2000) for protection of overload in
increased-safety explosion-proof motor;
AC sampling, measurement of current in A, B and C phases and voltage of control circuit
On-site display of operational conditions of motor, and storage of three records of motor tripping resulted from fault
One for protection output, one for self-defined relay output, and another for 4-20 mA current output or RS485
interface
HD wide-temperature crystal display to display promptly based on the operational conditions of motor and user’s
requirements, with background lighting
Selectable functions of realizing protection over unbalance of three-phase current, phase loss, overvoltage,
undervoltage and self start-up
E2PROM memory technology capable of maintaining the parameters even in power failure once set; do not need to
set again
Use of RS485 communication bus; a vast application in monitoring systems as an intelligent monitoring unit with
motor protection and control functions
Multiple purposes that can serve as ammeter, voltmeter, thermorelay, current transformer, time relay and leakage
relay.
3. Main functions
Protection:
Protection over faults such as overcurrent, locked rotor, phase loss, unbalance of three-phase current, overvoltage, undervoltage,
short-circuit, leakage(optional)
Measurement:
Measurement of current of three phases and voltage of control circuit, and display
General function:
Applicable for protection of increased-safety motor, three-phase asynchronous motor and feeder line
Communications:
Communications with upstream system is realized via RS485 interface of the protector. The bus interface supinterfaces
parameters setting, control and monitoring, as well as Modbus communications protocol. Usually, an RS485 bus interface is for
physical connection. And generally, an upper computer or a PLC device serves as the master station, and this protection serves as
substation.
Current output:
4-20mA current output; and current value corresponding to 20mA settable.
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—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 3 - -
4. Model description
Example:
WDB-Z-10A-AC220V
WDB-Z10A-AC220V model refers to that it is of an integrated structure, the current protection ranges from 10A to 50A
and the working power voltage of the protector is AC220V
WDB-FT-100A-AC380V
WDB-FT-100A-AC380V model refers to that it is with communications function and of a separated structure, the current
protection ranges from 30A to 100A and the working power voltage of the protector is AC380V
Current level:
Rating Range Power of motor
10A 1~10A 1~5KW
50A 5~50A 4~25KW
100A 10~100A 20~50KW
200A 20~200A 50~90KW
300A 50~300A 75~150KW
400A 100~400A 100~200KW
500A 150~500A 130~250KW
600A 200~200A 150~300KW
800A 300~800A 200~400KW
Notes:
1. The specifications of protector shall be decided
based on the power of the motor.
2. The voltage rating includes AC220V and AC380V,
based on the voltage of secondary circuit of control
motor.3. A protector under the ratings of 300A, 400A,
500A, 600A and 800A must be equipped with three
current transformers in a transformation ratio of 5A.
4. If three current transformers in a transformation
ratio of 1A are required, please specify when placing
the order.
5. Operating conditions
Three-phase penetration adaptive circuit: AC380V, AC660V
Voltage of working power: AC220V, AC380V
Ambient temperature: -10 - +22; relative humidity ≤90%
ASL not over 2500m
Atmospheric conditions: does not contain medium that may cause explosion, or may corrode metal, destroy
insulation and dust may conduct electricity
Installed in a place without strong impact and vibration, and away from rain and snow
Installed in a place without strong magnetic interference; kept away from soft starter and converter as far as possible
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—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 4 - -
6. Technical data
6.1 Input/output
Relay output
Trip relay J1 one normally-closed contact
User-defined relay J2 one normally-open contact (for example: closed when alarm sounds, alarm sounds for leakage
only, communication starts, etc.)
Output capacity 250VAC 5A
24VDC 5A
Auxiliary power supply
Voltage of AC power supply AC220V, AC380V±15%
Frequency 50HZ ±2%
Power consumption ≤3W in normal operation
≤5W when protection starts
Serial interface
Link communication terminal
Protocol Modbus
Internet link RS485 bus, shielded twisted pair
6.2 Electrical test
Dielectric resistance
Standard IEC255-5 100MΩ/500V
Insulation test
Standard IEC255-5
Dielectric strength test 2KV(r.m.s), 50HZ, 1min
Surge voltage test 5KV(peak); 1.2/50 u S; 0.5J;
5 positive, 5 negative, interval 5s
EMC immunity
Standard IEC255-22
Common-mode interface 2.5KV(peak), 1MHZ, 400 times/s
Duration: 2s
Common-mode interface 1.0KV(peak), 100KHZ, 50 times/s
Duration: 2s
Disturbance of radioactive electromagnetic field frequency: 27MHZ-1000MHZ; field intensity: 10V/m
Electrostatic discharge interference 8KV
Quick transient interference 2KV; 5KHZ; bipolarity; duration: 1min
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—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 5 - -
7. Protection feature and set range
7.1 Start-up protection
- During start-up, the protection only covers phase loss, overvoltage, undervoltage, short-circuit and unbalance of three-phase
current.
Start-up delay
Set range 0-255s
Default value 5s
7.2 Protection over unbalance (phase loss) of three-phase current
—— Protection over unbalance of three-phase current: to determine whether the value surpasses the limit based on the ratio of
minimum phase current to maximum phase current, and accordingly to determine whether protection action should be taken.
When current between two phases is greater than the trip value and lasts for certain amount of time (trip time), and fails to return
to normal during the trip time, the protector executes trip command and at the same time displays the trip information about
unbalance of three-phase current on the operation panel.
—— Phase loss protection: when one or two phases of the three-phase current lose and lasts for a certain amount of time (trip
time), and fails to return to normal during the trip time, the protector executes trip command and at the same time displays the
trip information about phase loss on the operation panel.
Function (on/off)
Switch setting 0=off other=onMethod to calculate unbalance =[( maximum current –minimum current)/maximum current ]×100%
Trip value
Set range 20-80
Default value 60 (means that the unbalance percentage of phase with maximum current and phase with minimum
current is 60%)
Trip time ≤ 2.0s
7.3 Locked rotor protection
—— After the completion of start-up, determine whether the value surpasses the limit based on the ratio of maximum phase
current to rated current, and accordingly to determine whether protection action should be taken. When the current is greater
than the trip value and lasts for certain amount of time (trip time), and fails to return to normal during the trip time, the protector
executes trip command and at the same time displays the trip information about locked rotor on the operation panel.
Trip value
Set range 3-8 (3-8 times of rated current)
Default value 5
Trip time ≤ 1.0s
7.4 Overcurrent protection
——The current of motor is calculated to prevent the motor from short service life or damage due to overcurrent. The current of
motor is directly displayed on the panel. The overcurrent protection action is inverse time limit protection, and the time to take
the action can be user-defined based on the demand. The overcurrent multiple and protector action time corresponding to
8/2/2019 WDB Operation Manual
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—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 6 - -
overcurrent S/N are shown in Table 1.
Table 1
IA/IN
1 2 3 4 5
≥1.2 60 120 180 240 300
≥1.3 48 96 144 192 240
≥1.4 36 72 108 144 180
≥1.5 8 16 32 48 64
≥2.0 5 10 20 30 40
≥3.0 2 4 8 12 16
≥3.5 1 2 4 6 8
Note: In the table, IN represents setting current, IA represents working current, and the action time is in a
unit of second.
Set range 1-5 (overcurrent S/N)
Default value 1
Set range 0.5-0.8 (rated current)
Default value half of current level
7.5 tE time protection (increased-safety motor)
——determine whether the value surpasses the limit based on the ratio of start-up current to rated current, and accordingly to
determine whether protection action should be taken. When the current is greater than the trip value and lasts for certain amount
of time (trip time), and fails to return to normal during the trip time, the protector executes trip command and at the same time
displays the trip information on the operation panel. The ratio of minimum motor te time to start-up current is IA/IN; and the
characteristics of protection action time is shown in Table 2.
Table 2
IA: start-up current; IN: rated current of motor; te: start action time
Trip value
Set range 0.5-800 (rated current)
Default value half of rated current
Action
time (s)
Set range
S/N
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—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 7 - -
7.6 Overvoltage protection (voltage of control circuit)
——determine whether the voltage surpasses the limit based on the ratio of measured voltage to rated working voltage, and
accordingly to determine whether protection action should be taken. When the voltage is greater than the trip value and lasts for
certain amount of time (trip time), and fails to return to normal during the trip time, the protector executes trip command and at the
same time displays the overvoltage-caused trip information on the operation panel.
Functions (on/off)
Switch setting maximum value=off other=on
Trip value
Set range 220-286 (overvoltage value)
Default value 264
Trip time ≤ 5.0s
7.7 Undervoltage protection (voltage of control circuit)
——determine whether the voltage surpasses the limit based on the ratio of measured voltage to rated working voltage, and
accordingly to determine whether protection action should be taken. When the voltage is less than the trip value and lasts for certain
amount of time (trip time), and fails to return to normal during the trip time, the protector executes trip command and at the same
time displays the undervoltage-caused trip information on the operation panel.
Function (on/off)
Switch setting 0=off other=on
Trip value
Set range 220-155 (undervoltage value)
Default value 176
Trip time ≤10s
7.8 Protection over short circuit
——determine whether the current value surpasses the limit based on the ratio of maximum line current to rated current, and
accordingly determine whether protection action should be taken. When the current is greater than 8 times of rated current and
lasts for a certain amount of time (trip time), and fails to return to normal during the trip time, the protector executes the trip
command, and at the same time, short-circuit-caused trip information is displayed on the operation panel.
Trip time ≤ 0.2s
7.9 Self-start function (please specify when placing order)
——For a protector with this function, the user needs to set self-start time, and by then the motor cannot be started via
communication start.
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—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 8 - -
8. Keypad operation and display
8.1 Panel description
In , U represents function code, while the last three digits refer to the parameters of function of U code.
8.2 Functional keys description
Setting: select setting type
Move: under setting status, press down Move key to select the to-be-set item (this item blinks), and revise the parameter via the
Data key. In normal status, press down Move key to display the code of fault occurred before, and press Reset to exit.
Data: under setting status, press Data key once, one more item blinks; when the motor operates normally, press down Data key
to display the voltage value, and press Reset key once to return to current value display.
Reset: under setting status, press Reset to exit setting; press Reset to reset the protector after the protection action is taken, and
then the protector can function as usual once restarted; in normal operation, press Reset to pause the repeat displayof currents but to display certain present current only, and press one more to return to repeat display of currents.
8.3 Operation
——When the protector is powered on, the LCD presents STOP; when the motor is started, the LCD presents “-----“; the
protector enters into operation after start status, and on LCD, the first digit represents the code of current phase, while the last
three digits represent the current value. If the Data key is pressed, the LCD presents voltage value; if the Reset key is pressed,
the LCD presents the current of certain phase constantly, and subsequently, if the Reset key is pressed again, the LCD returns
to repeat display of current of three phases.
8.4 Setting of protection parameters
——During the start and operation of motor, the Setting key is invalid. When the motor is not started and the protector is
powered on, press Setting key to select the setting type, by now the setting indicator lamp is on, then press Move key to move
around, and Data key to revise the data; when the setting of certain parameter is completed, press again the Setting key to next
item until all parameters are set. After all parameters are set, press Reset key to exit setting, then the LCD displays STOP.
Sequence of
operation
Display
contentCode meaning Set range
1st
pressing of
SettingStart-up time 1-99s
2nd
pressing of
SettingRated current Within the range of protection value
3rd
pressing of
Setting
Reverse time limit protection
action in overcurrent
Within the range corresponding to
items 1-5
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—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 9 - -
4th
pressing of
SettingOvervoltage value About 120% of rated voltage
5th
pressing of
SettingUndervoltage value About 80% of rated voltage
6th
pressing of
SettingLocked rotor multiple 3-8
7th
pressing of
SettingCorrespondence address 0-255
8th
pressing of
SettingLeakage current
Within the range corresponding to
items 0-9
9th
pressing of
Setting
Percentage of unbalanced
three-phase currentAbout 60% of current phase difference
10th
pressing of
Setting
Rated current ratio of ratio-type
transformer
Based on the ratio rating of current
transformer
11th
pressing of
SettingCurrent output On phases A, B, C
12th
pressing of
SettingError in current output
Within the rang of required
positive/negative error
13th
pressing of
Setting
Setting current corresponding
to 20mA outputWithin the range of current level
10th pressing of Setting: Code F corresponds to levels 400A and 600A only, not to other levels, for example a 400: 5 current
transformer, F is set as 400.
When the setting is completed, press again the Reset to exit setting and save the set value.
As for the 11th, 12th and 13th setting above, they are only available for a protector with 4-20mA output function.
8.4 Setting, operation and fault indication
—— When the protector detects fault in the motor, on the LCD, the first digit represents corresponding fault code and
continues to blink before a trip signal is sent out. After the protection action is taken, corresponding fault type, motor current and
voltage are displayed, and the fault indicator lamp turns on.
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—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 10 - -
9. Outline structure and installation dimension
9.1 Installation method of separated type, and open hole size
9.2 Installation method of integrated type, and size
9.3 Installation method of zero sequence transformer and its size
2A, 10A, 50A, 100A leakage zero sequence current transformer 200A-800A leakage zero sequence current transformer
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—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 11 - -
10. Wiring diagram
10.1 Wiring principle
10.2 Typical wiring diagram
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—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 12 - -
Current input
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—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 13 - -
11. Remote communication system for computer monitoring motor protector
solution
Main
functions
Use of RS485 digital serial interface; communication distance ≤ 1200m (replace of RS232 interface
into RS485 interface via interface card)
Communications between every upper computer (PC) and up to 256 microcomputer-monitored motor
protector available
Protection parameters of every motor revisable; and start and stop of every motor available.
Detection of current, voltage, operational status and fault of every motor available
12. Notes1. When the protector is wired, all terminals should be properly connected based on its purpose.
2. The working power supply of protector should be connected to the control circuit. Noted that the nominal voltage should cater
for the actual voltage.
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—— Instructions —— WDB Series Microcomputer-monitored motor protector
Zhejiang Kuixing Electrical Co., Ltd. Tel: 0577-64700611 64701518 Fax: 64758918
- - 14 - -
3. When the protector is equipped with a current transformer with function of transformation ratio, if an ammeter is required at
site or in the control room, it is better to provide a current transformer with function of transformation ratio, or the display of
phase current with ammeter may be affected.
13 Instructions for order
1. Please specify the model, specifications, quantity and voltage of working power supply of the protector in purchase of a
protector.
2. When ordering a separated protector, the user can make clear the distance between the upper part and lower part of the
protector based on the installation requirements, and the distance shall not be over 5.
3. The warranty period is one years. Within two years since the date the protector is received, you can return the protector to us
in case of any faults or damage during transportation, we would exchange without any additional charge (excluding
manmade damages).