MPR-6/3 - Mikro Kontrolmikrokontrol.rs/proizvodi/pdf/MPR-6-3-Instruction Manual.pdf · Up to 32 MPR-6 relays can be connected on the same ... Notes: 1. Leave terminals ... In the

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IInnssttrruuccttiioonn MMaannuuaall This instruction manual is updated for MPR-6/3 manufactured after Nov. 1 2003

1

Table of Contents

Page Subject 2 Introduction 3 Wiring Diagram 4-5 Terminal Review 6-7 Front Panel and LCD Displays 8-9 Menu Configuration 10-15 Parameter Settings 16 Trip/Alarm and Reset Options 17-18 Setting Summary 19 Actual Data 20 Statistical Data 21 Service Messages 22 Flash & Constant Massages 23 Communication 24-25 Technical Specification 26 Dimensions

Safety • Read this manual carefully before operating the equipment and follow its instructions • Installation, operation and maintenance should be in strict accordance with this manual, national

codes and good practice. Installation or operation not performed in strict accordance with these instructions will void manufacturer’s warranty.

• Disconnect all power inputs before servicing the MPR-6.

Attention 1. This product was designed for compliance with IEC 947-4-2 for class A equipment. 2. The MPR-6 is designed to meet UL requirements 3. For further information, see Technical Specification

Warnings • Internal components and PCBs are at main potential when the MPR-6 is connected to main. This

voltage is extremely dangerous and will cause death or severe injury if contacted. • Unit must be grounded to ensure correct operation, safety and to prevent damage.

The company reserves the right to make any improvements

Or modifications to its products without prior notice.

Introduction

2

The MPR-6 Motor Protection Relay is a new generation of microprocessor based relay designed to protect three phase induction motors. The MPR-6 incorporates two main functions. a. Motor protection. b. Supervision and communication. Motor Protection AC motors are very rugged and reliable when operating within their limits. However, they are usually designed to operate close to their rated limits with minimal margins for operating under abnormal conditions. A comprehensive protection device is required to accurately create a Thermal Model for the motor to run safely up to its limits. This relay should protect the motor from abnormal conditions in the power supply, motor and cable faults as well as operator malfunctions. The MPR-6 monitors three phase and ground currents (true RMS line currents are measured at a sampling rate of 0.5 mSec) and three temperature (RTD or PTC/NTC Thermistor) inputs. In all, the MPR-6 provides a comprehensive protection package. Protection - Too many starts - Maximum start time, - Under current (*) - Load increase - Thermal level (Overload) (*) - Over-current Jam / Stall & Short circuit (*) - Unbalanced current (*) - Ground fault current (*) - Phase Sequence - Temperature (3 Sensors)- RTD Pt.100 or PTC/NTC Thermistor (*) - External fault 1- N.O/N.C contacts - External fault 2 - N.O/N.C contacts Two separate levels (*) Each of these faults has 2 separate levels. Normally level 1 will be used as an Alarm and level 2 as a Trip. It is possible to use both as Alarms or as Trips with different time delays. Field settings Protection levels and time delay settings are individually configured through the key pad on the front panel or through the communication port. Configurable operation Unique Tripping/Alarm options, makes it possible to designate any of the above faults as an Alarm, Trip, both or none. Further more, two auxiliary relays can be designated to operate with any of the faults.

"Time To Trip" and "Time To Start" When current exceeds the overload setting a built-in unique algorithm calculates the time until motor will be tripped (when thermal capacity is 100%), enabling the operator or host computer to take corrective actions before tripping. After the MPR-6 has tripped the motor it will calculate the time delay until motor can be restarted, after it has cooled down. Informative data An illuminated LCD (Liquid Crystal Display) with 2 lines and 16 characters each provides clear status and statistical information. Identical information is available through the communication Actual Data - Phase currents, Ground fault current, Three Temperature sensors (PT100 or Thermistor) temperatures or resistances, Motor load in % of FLC, Thermal Capacity, Time to trip, Time to start, Unbalanced current.

Statistical Data - Motors running hours, Total number of starts, Total number of trips, Last start time, last start current peak, Last Trip, Last Alarm, Pre-Trip Phase currents and Ground fault current.

Communication RS485 serial link with Modbus communication protocol, operating at baud rate of 1200 to 9600 bits/sec enables monitoring of setpoints and actual parameters. Modifications of the setpoint parameters through the serial link make it very easy to enter user setpoints in place of the factory default parameters. The serial link enables remote control of both the MPR-6 and the motor. Up to 32 MPR-6 relays can be connected on the same link to the host computer. When a need for more than 32 units arises, using MMI & Data highway equipment, an unlimited number of relays can be connected to the host computer. Analogue Output Programmable Analogue Output in reference to: Motor Load Current, Max. of I1-I3, I1, I2, I3, Ground Current, T1, T2, T3, Min. of T1-T3, Max of T1-T3, Thermal Capacity and can be programmed to normal or inverted : 0-20mA, 4-20mA outputs. Easy setting and operation The front panel LCD together with a Keypad and LEDs enables user friendly interface, accurate digital parameters setting, actual parameters reading, and detailed trip and alarm messages display. Unauthorized setting changes can easily be prevented by the software setting

Wiring Diagram & Terminals Review

3


4

Output Relays (C/O, 8A/250VAC, 2000VA) Alarm Relay (Fail-Safe logic) Common .................................................................... 1 N.C ............................................................................ 2 N.O ........................................................................... 3 Fail safe logic - when MPR-6 is energized Alarm Relay is energized (changing contacts position). Upon fault which is designated as "Alarm" the relay de-energizes (contacts return to original position). Trip Relay Can be designated (by parameter setting) as one of: * Trip relay (changes contact position upon fault which is designated as "Trip"). * Trip relay with Fail-Safe logic. Common ……………………………………………..4 N.C ............................................................................ 5 N.O ........................................................................... 6 Programmable Relay C Can be designated (by parameter setting) as auxiliary relay - dedicated for a fault or group of faults. Common ……………………………………………..7 N.C ............................................................................ 8 N.O ........................................................................... 9 Programmable Relay D Can be designated (by parameter setting) as auxiliary relay - dedicated for a fault or group of faults. Common ……………………………………………10 N.C .......................................................................... 11 N.O ......................................................................... 12 Discrete inputs Input 1....................................................................... 13 Programmable: Reset, External Fault (N.O or N.C). Input 2 ...................................................................... 14 Programmable: Reset, External Fault (N.O or N.C). Common .................................................................. 15 Note: The Discrete input circuitry is isolated as a group from all other terminals. Control power supply 115, 230VAC to be specified, at 50/60 Hz. Consult factory for universal AC/DC power supply. Ground ..................................................................... 18 Neutral ..................................................................... 19 Phase ..................................................................... 20 Analogue Inputs Line Currents (from 5A C/T, or 1A by special order) Phase L1 ........................................................... 21 ,22 Phase L2 ..................................................... 23 ,24 ,25 Phase L3 . .................................................... 26, 27, 28 Terminals 25 and 28 are for convenience when residual wiring is used

Ground Fault Current ........................................ 29, 30 C/T Wiring Diagrams Note: It is advisable to use Core Balance C/T.

3 phase C/Ts + Core Balance C/T

3 phase C/Ts in a Residual Ground Fault connection.

Note: In case of residual Ground Fault connection, It is recommended to set G/F During Strt to relatively high level, to avoid nuisance tripping.

Optional wiring: Three phase protection using 2 C/Ts. Where: I3=-(I1+I2)

Note: This connection is not recommended. In case

this connection must be used, accuracy will be reduced and Ground Fault [protection is not possible.

5A 5A 5A 5A

21 22 23 24 26 27 29 30

L1

L2

L3

CT1 CT2 CT3 CT4

5A

21 22 23 24 25 27 29 30

L1

L2

L3

5A

CT1

5A

CT2 CT3

5A

CT4

26 28

5A

21 22 23 24 25 27 29 30

L1

L2

L3

5A

CT1

5A

CT2 CT3

5A

CT4

26 28


5

Resistances * RTD 100Ω-240Ω * Thermistor 0.1KΩ-30KΩ RTD or Thermistor selection (all must be of same type) is done by removing rear panel to set Dip Switches SW1.1 - SW1.8 on Micro-Controller Printed Circuit Board. Set all 8 ON for Thermistors and OFF for RTDs. Set “CH. 1 2 3 Sensoer” setting parameter accordingly. RTDs three wire measurement system is used to compensate for cable resistance. See temperature table below. Resistance-Temperature-Device Conversion Table (Pt.100=Platinum 100 Ω) TEMP IN Pt.100 OHMS (Ω) (°C) (DIN 43760) --------------------------------------------- 0 100.00 10 103.90 20 107.79 30 111.67 40 115.54 50 119.40 60 123.24 70 127.07 80 130.89 90 134.70 100 138.50 110 142.29 120 146.06 130 149.82 140 153.58 150 157.32 160 161.04 170 164.76 180 168.46 190 172.16 200 175.84 Notes: 1. Leave terminals open if temperature sensor is not

connected and Disable temp. Alarm and Trip. 2. Maximum cable resistance allowed for RTD, must

be less than 25Ω. 3. Shielded cables must be used, connect shield to

ground (earth).

RTD / Thermistor Input RTD 100-240Ω ...........................................41-42&43 RTD 100-240Ω ...........................................44-45&46 RTD 100-240Ω ...........................................47-48&49 (Where 43, 46 & 49 are for RTD compensation) Thermistor 0.1K-30KΩ ....................................41-42 Thermistor 0.1K-30KΩ ....................................44-45 Thermistor 0.1K-30KΩ ....................................47-48 Disconnected Temperature Sensor The MPR-6/3 contains “Disconnected Temp. Sensor” which detects a missing sensor and signals the “Alarm”, but not the “Trip”. Normally, when a sensor’s temperature is very high, a typical relay will trip on high temperature. In the MPR-6/3 when temperature reading becomes infinite rapidly, it will only Alarm and will not Trip. Temp. measurements will show ????. Serial Link Standard RS485 Half Duplex, with MODBUS protocol. Twisted shielded pair should be used for wiring. Serial Port (-) ............................................................ 39 Serial Port (+) ........................................................... 40 Shield – Connect to Ground Note: 1. In order to match the line, connect 120 Ω

resistor between (+) and (-) at the end and beginning of the line.

Analogue Output Programmable Analogue Output in reference to: Motor Load Current, Max. of I1-I3, I1, I2, I3, Ground Current, T1, T2, T3, Min. of T1-T3, Max of T1-T3, Thermal Capacity and can be programmed to normal or inverted output. Twisted shielded pair should be used for wiring, Connect Shield to Ground. Frogramming allow selection between: 0-20mA 4-20mA Or their respective inverse.Maximum value (20mA or 0mA) is related to max. scale defined in the “Analogue out Full Range” window. Analogue Port (+) ..................................................... 51 Analogue Port (-) ...................................................... 52 Shield – Connect to Ground (See note) Warning The communication circuit is isolated as a group together with analogue output. The analogue output circuit is isolated as a group together with the RS485 communication. When using both connections, verify that analogue out user (or RS-485 user) is using isolated circuitry.

Front Panel &LCD Displays

6

LEDs and LCD On - Illuminates when control power supply is connected. Start/ Run - Flashes during starting, illuminates continuously after completion of starting Alarm /Trip - Flashes in Alarm condition, illuminates continuously at Trip condition . Turns off after resetting. LCD Display – Illuminated two lines of 16 characters each, presenting all data and messages. Operation Upon initiation the On LED lights and the LCD displays:

Communication ***Settings***

In order to review above page press Select key. Messages are displayed on the LCD in two lines. • Upper line describes

parameter's name. • Lower line shows its value.

To change settings, press

or keys and save the new value by pressing Store key. Once data was properly stored in the non-volatile memory the LCD displays the 2 sec. flash message:

DATA SAVED OK

Notes : 1. A new parameter setting

becomes effective when set, even before storing it in the non-volatile memory. Setting a parameter without storing, and moving to another page, will return the parameter to its previously stored value.

2. Any set-point parameters can be viewed, altered and stored at any time (provided that Parameters Lock set to No). However, it is not recommended to change and store parameters while motor is starting or running.

3. Any stored parameter is kept indefinitely in the non-volatile memory.

Keys Page - Press to change set-point pages in positive cyclical order. Select - Press to scroll parameters within page. If key is pressed for more than 0.5 sec, parameters will be displayed at a fast rate.

- Press to increase / decrease parameter value. Press and hold to fast rate changing (*). Store - Press to store displayed parameter value in the non-volatile memory (*). Reset - Press for more then 0.5 Sec. to cancel displayed Alarm or Trip (*). Short press on the RESET key will toggle the direction of massage display. At up direction a " __ " character is displayed at the bottom left hand side of the LCD. Pressing on Page key or leaving the keypad with no action for 10 Sec returns scroll direction to forward (down) direction. Notes: If "Parameters Lock" is set to Yes, parameters can be only viewed. When Parameters lock is set to No, it is possible to view, change and store any setting parameter.

Front Panel & LCD Displays

7

Five types of information displays are available. 1. Parameter Settings By pressing Page key the LCD displays the following headers:

SYSTEM PARAMETER ***SETTINGS***

PROTECTION

***SETTINGS***

TRIPPING / ALARM ***OPTIONS***

2. Informative Data By continuing pressing Page the LCD displays the following headers:

ACTUAL DATA - **** -

STATISTICAL DATA

- **** - 3. Service Messages

By pressing Page and keys the LCD displays the following header:

*** SERVICE *** *** OPTIONS ***

4. Flash Messages Flash messages are displayed as a response to an event. For example, the flash message after storing is:

DATA SAVED OK

5. Constant Messages Messages which are displayed upon fault. For example, when starting process is too long and MAX START TIME is enabled as Trip the following constant message will appear.

TRIP: MAX START TIME

Alarm message for a missing Temperature sensor. Notes : 1. Pressing Store key while the LCD displays an

"Actual Data" parameter, will store this parameter as default display. If no key is pressed for more than five minutes, this parameter will be constantly displayed.

2. Pressing Store key while the LCD displays a header, will store this header as the default display. If no key is pressed for more than five minutes this header will be constantly displayed

Returning to Factory Default Values Press Page and simultaneously, the LCD will display:

*** SERVICE *** ***OPTIONS***

Press Select key twice, the LCD will display:

STORE NOW ? DEFAULT SETTINGS

Press Store and Page keys simultaneously, the LCD will display:

DATA SAVED OK

Attention : Storing Default parameters erases all previously updated parameters. Clearing Statistical Data Values Press Page and simultaneously, the LCD will display:

*** SERVICE *** ***OPTIONS***

Press Select key three times, the LCD will display:

CLEAR STATISTICAL DATA

Press Store and Reset keys simultaneously, the LCD will display:

DATA SAVED OK

Attention : Clearing statistical data erases all previously stored statistical data.

Menu Configuration

8

UPON INITIATION, the LCD Displays: I1= , I2 = , I3 =

PAGE 1 PAGE 2 PAGE 3 PAGE 4 PAGE 5

SYSTEM PARAMETER

*** SETTINGS *** PROTECTION

*** SETTINGS *** TRIPPING ALARM

*** OPTIONS *** ACTUAL DATA

-****- STATISTICAL DATA

-****-

SELECT SELECT SELECT SELECT SELECT

TO REVIEW/MODIFY ALL PARAMETERS PRESS KEYS TO CHANGE PARAMETER VALUE

LINE FREQUENCY 50HZ

MAX START TIME 10 SEC

MAX START TIME TRIP: DISABLE

I1 I2 I3 82 83 82 A

LAST STRT PERIOD 5.5 SEC

MOTOR FLC 100 AMP

NUMBER OF STARTS 10

MAX START TIME ALARM: ENABLE

GROUND CURRENT 0 AMP.

LAST START MAX I 550A

CT PRIMARY 100 AMP

STARTS PERIOD 30 MIN

MAX START TIME AUTO RST: DSABL

T1 T2 T3 95 97 96 C

LAST TRIP THERMAL LEVEL 2

GND CT PRIMARY 100 AMP

#ST AUTO RST DLY 15 MIN.

MAX START TIME RELAY C: DISABLE

MOTOR LOAD CURR. 82 % OF FLC

LAST ALARM THERMAL LEVEL 1

TRIP INHIBIT OFF

U/C LEVEL 1 50 % OF FLC

MAX START TIME RELAY D: DISABLE

UNBALANCE CURR. 0 %

TRIP I1 I2 I3 90 90 90 A

CONFIG TRIP DELAY TRIP

U/C LVL 1 DELAY 2 SEC

TOO MANY STARTS TRIP: DISABLE

THERMAL CAPACITY 20 % OF CAPACITY

TRIP GND CURRENT 0 AMP

CONFIG INPUT 1 REMOTE RESET

U/C LEVEL 2 40 % OF FLC

U/C LEVEL 1 TRIP: DISABLE

TIME TO TRIP-O/L NO TRIP EXPECTED

TRIP T1, T2, T3 125 128 127 C

CONFIG INPUT 2 REMOTE RESET

U/C LEVEL 2 DELAY 5 SEC.

U/C LEVEL 2 TRIP: DISABLE

TIME TO START 0 SEC.

TOTAL RUN TIME 10137.5 HOURS

CONFIG. ANLG OUT 4..20mA NORMAL

LOAD INCREASE 120 % OF FLC

LOAD INCREASED TRIP: DISABLE

CURRENT FLUCTAT 3 % OF FLC (not tested now)

TOTAL # OF START 1017

AN.OUT PARAMETER MOTOR LOAD CURR.

O/C LEVEL 1 – JAM 400% OF FLC

O/C LEVEL 1 - JAM TRIP: ENABLE

TOTAL # OF TRIPS 12

AN.OUT FUL RANGE 200 % OF FLC

O/C LVL 1 DELAY 2.0 SEC

O/C LVL 2 - SHORT TRIP: ENABLE

PARAMETERS LOCK NO

O/C LVL 2 – SHORT 800 % OF FLC

THERMAL LEVEL 1 TRIP: DISABLE

ADDRESS NUMBER 248

O/C LEVEL 2 DELAY 0.5 SEC.

THERMAL LEVEL 2 TRIP: ENABLE

BAUD RATE 19200

OVERLOAD PICKUP 105% OF FLC

UNBALANCE LVL 1 TRIP: DISABLE

S. LINK PAR. SAVE DISABLE

THERMAL LEVEL 1 80% OF CAPACITY

UNBALANCE LVL 2 TRIP: ENABLE

T6X TIME 10.0 SEC.

PHASE SEQUENCE TRIP: DISABLE

G/F DURING STRT 100 % OF FLC

HOT/COLD RATIO 50 %

GND FAULT LVL 1 TRIP: DISABLE

CH. 1 2 3 SENSOR PT100

COOL TIME FACTOR 5

GND FAULT LVL 2 TRIP: ENABLE

TEMP. 1 LEVEL 1 100 deg. C

UNBALANCE LVL 2 15 % OF FLC

COMM PORT FAILED TRIP: DISABLE


UNBALANCE MIN T 5 SEC.

INTERNAL FAILURE TRIP: DISABLE

TEMP.2 LEVEL 1 TRIP: DISABLE


U/B LVL 2 MAX T 30 SEC.

EXTERNAL FAULT 1 TRIP: DISABLE

TEMP. 2 LEVEL 2 TRIP: DISABLE


GND FAULT LVL 1 5% OF FLC

EXTERNAL FAULT 2 TRIP: DISABLE



G/F LVL 1 DELAY 10 SEC.




GND FAULT LVL 2 10 % OF FLC


UNSTABLE CURRENT TRIP: DISABLE

UNSTABL CURRENT 5 % OF FLC

G/F LVL 2 DELAY 0.5 SEC.

Menu Configuration

9

Program Version MP3141003-Modbus

Store Now ? Default Settings

Clear Statistical Data

*** SERVICE *** *** OPTIONS ***

Select

Page 1

Press Page + Key to enter Service Options mode

Key to select the required parameters

Press Page + Store Key to Store Default Settings

Press Reset + Store Key to Clear statistical Data

Parameter Settings

10

SYSTEM PARAMETERS ***SETTINGS***

Parameter & Default Value Description Range Increments

LINE FREQUENCY 50 HZ

Rated frequency 50 / 60 Hz

MOTOR FLC 100 Amp. Motor Full Load (name plate) Current. 1 - 1000A

1A to 100A 5A above 100A

CT PRIMARY 100 Amp. Primary rated current of Current Transformer. 1 - 1500A.


GND CT PRIMARY 100 Amp. Primary rated current of Ground Fault Transformer. 1 - 1500A


TRIP INHIBIT OFF

Inhibits Trip command thus preventing opening of motor contactor when current exceeds a set value, to prevent contactor's damage. The fault must be cleared by an upstream circuit breaker or fuses. When contactors are not used (circuit breaker application) set to OFF. Note: Thermal Level 2 Trip overrides trip inhibit setting.

400-1000% of Motor FLC, OFF

10%

WARNING The MPR-6 will not protect the motor against high current above the current inhibit setting. It is the customer's responsibility to ensure that the motor is protected against fault current, above Current Inhibit by external protection.

CONFIG. TRIP REL Trip

Designation of Output Relay B as: • Trip • Trip fail-safe

CONFIG. INPUT 1 Remote Reset Designation of Input -1 as:

• Remote Reset • Ext. fault 1 N/O • Ext. fault 1 N/C

CONFIG. INPUT 2 Remote Reset Designation of Input -2 as:

• Remote Reset • Ext. fault 2 N/O • Ext. fault 2 N/C

CONFIG. ANLG OUT 0..20mA NORMAL

Choose Desired Output range (in mA) • 0-20mA, 0-20mA Invert • 4-20mA, 0-20mA Invert

AN.OUT PARAMETER Motor Load Curr.

Parameter for the analogue output ref.

Motor Load Curr., Max. of I1-I3, I1, I2, I3, Ground Curr., T1, T2, T3, Min. of T1-T3, Max. of T1-T3, Thermal Capacity

AN.OUT FULL RANGE 200 % of FLC

Define the highest output of the ref. device From 0-250% (in °C or mA), or % of Thermal Capacity (Respectively)

PARAMETERS LOCK No

Set to Yes to prevent parameter modification, parameter storing and Thermal Capacity reset. No / Yes

ADDRESS NUMBER 248

MPR-6 Address on Serial Link. RS485 Allows a maximum of 32 MPR-6's on a twisted pair. For user convenience in programming the number of serial links is extended to 3 digits.

1-247, 248 = Off 1

BAUD RATE 19200

Serial Link communication speed in bps. Disconnect and then reconnect control supply after any change of baud rate.

1200, 2400, 4800, 9600,19200

S.LINK PAR. SAVE Disable

Enables / Disables to store setting parameters through serial link. Disable / Enable

Parameter Settings

11

PROTECTION ***SETTINGS***


MAX. START TIME 10 sec.

Maximum permitted starting time. End of starting is assumed when motor's current decreases below 110% of Overload Pickup value.

1 - 250 sec. 1 sec.

NUMBER OF STARTS 10

Maximum Permitted number of starts during "Starts Period". Auto Reset, when Enabled, occurs after "#St Auto Rst Dly" time has elapsed.

1 - 10 1

STARTS PERIOD 30 min.

Time period during which the number of starts is counted. 1 - 60 min. 1 min.

#ST AUTO RST DLY 15 min.

Auto reset (when enabled) delay after Too many starts faults. 1 - 60 min. 1 min.

U/C LEVEL 1 50 % of FLC

Under Current level-1 for a running motor. Fault occurs when current decreases below the set value for more than U/C Lvl 1 Delay.

10 - 90 % of Motor FLC. 1%

U/C LVL 1 DELAY 2 sec.

Under Current level-1 delay. 1 - 60 sec. 1 sec.

U/C LEVEL 2 40 % of FLC

Under Current level-2 for a running motor. Fault occurs when current decreases below the set value for more than U/C Lvl 2 Delay.

10 - 90 % of Motor FLC. 1%

U/C LVL 2 DELAY 5 sec.

Under Current level-2 delay. 1 - 60 sec. 1 sec.

LOAD INCREASE 120 % of FLC

Load Increase Alarm. Operative after start process ended (after current decreased below 110% of Overload pickup). Fault occurs when motors average current increases above the set value for more than 5 sec.

60 - 150% of Motor FLC 1%

O/C LEVEL 1 - JAM 400% of FLC

Over Current Level-1. Stall / Jam protection, operative after end of starting process. Fault occurs when motors average current increases above set value for more than O/C Lvl 1 Delay.

100 - 500 % of Motor FLC. 10%

O/C LVL 1 DELAY 2.0 sec.

Time delay for over current level-1. 0.5 - 10 sec. 0.1 sec.

O/C LVL 2-SHORT 800 % of FLC

Over Current Level-2. Short circuit protection, operative during starting and running. Indicates that current exceeded set value for more than O/C Delay. Note: O/C Level 2" Trip is prevented when the highest of any of the line currents exceeds Trip Inhibit setting. It is designed to prevent opening of motor contactor under high short circuit conditions to protect it's contacts from being damaged.

400 - 1200 % of Motor FLC. 10%

O/C LEVEL 2 DELAY 0.5sec.

Time delay for over current level -2. Note: When set to 0 actual delay is less than 90 mSec.

0 – 4 sec. 0.1 sec.

Parameter Settings

12


OVERLOAD PICKUP 105 % of FLC

Lower threshold for Thermal Level 1 / 2 protection. Thermal trip is not possible as long as current is below the set value. When current increases above the set value a trip will occur after a time delay that depends on the present value of the current level, the “Thermal Capacity” and on the t6x setting

60 – 130 % of Motor FLC. 1%

THERMAL LEVEL 1 80 % of Capacity

Simulation of motor’s thermal condition, stored in a thermal register. The “heating” of the thermal register (i.e. it’s increment) is related to the square of the current (the highest of the three line currents). The rate of “cooling” of the thermal register is directly related to motor’s present Thermal condition. Thermal capacity of 100% is equivalent to a motor running at the maximum allowed temperature. At this point the motor must be tripped (Thermal level 2). “Thermal Level 1” is adjustable from 50-99% of “Thermal Trip”. The following three parameters are used to calculate the “Thermal Capacity”.

50 – 99 % of max. thermal capacity.

1%

t6X TIME 10.0 sec.

Overload trip time of cold motor at 6 times Motor FLC. (The time required to heat Thermal Capacity from 0 to 100% at 6 x FLC).

0.5 – 120 sec. 0.5

HOT/COLD RATIO 50 %

The ratio between thermal Capacity available for a hot motor and thermal capacity available for a cold motor. (A higher setting allows for a longer time before tripping hot motor due to high current).

20- 100% of Thermal Capacity.

1%.

COOL TIME FACTOR 5

The Ratio between cooling time constant of stopped motor to the heating/cooling time constant of running motor.

1 – 15 1

UNBALANCE LVL 2 15 % of FLC

Unbalance Current –The difference between maximum and minimum values of motors’ three line currents, divided by motors’ maximum current or motors’ FLC (this method prevents nuisance alarms at low currents). Fault occurs only if actual Unbalance is greater than the set value. See figure 6 for time delay. This parameter has no influence on unbalance level 2 time delay. Note: Unbalance Level 1 is automatically set to 50 % of Unbalance Level 2 setting.

10 – 40% see curve on page 15

UNBALANCE MIN T 5 sec.

Unbalance minimum time for both level 1 and 2. It is the time delay for Level 1. Level 2 cannot respond faster than this setting.

1 – 30 sec. 1 sec.

U/B. LVL-2 MAX T 30 sec.

Unbalance curve selection. Time delay at 10 % of Unbalance. Fault time inversely relates to the actual unbalance (See page 15).

20 – 120 sec. 1 sec.

GND FAULT LVL 1 5% of FLC

Ground fault current level-1. Fault occurs when Ground Current exceeds the set value for more than G/F Lvl 1 Delay.

1-100% of Motor FLC 1 %.

Parameter Settings

13


G/F LVL 1 DELAY 10 sec.

Ground fault current level-1 Delay. 1 – 60 sec. 1 sec.

GND FAULT LVL 2 10 % of FLC

Ground fault current level-2. Fault occurs when Ground Current exceeds the set value for more than G/F Lvl 2 Delay.

1-100% of Motor FLC 1 %

G/F LVL 2 DELAY 0.5 sec.

Ground fault current level-2 Delay. Note: When set to 0 actual delay is less than 90 mSec.

0 - 2 sec. 0.1 sec.

G/F DURING STRT 100 % of FLC

During starting, both GND FAULT LVL 1 and GND FAULT LVL 2 are ignored. G/F DURING STRT is used instead..

1-100% of Motor FLC 1 %

CH. 1 2 3 SENSOR PT100

Selects desired type of temperature sensors. NTC - Negative Temperature Coefficient PTC - Positive Temperature Coefficient PT100 - 100Ω RTD. Thermistor / PT100 change must be accompanied by internal dip switch settings.

• NTC Thermistor • PTC Thermistor • PT100

TEMP. 1 LEVEL 1 100 deg.C

Choose the desired temperature set point for Sensor # 1Alarm.

• 0-250°C • 0.1-30KOhm

1°C 0.1KOhm


Choose the desired temperature set point for Sensor # 1 Trip.

• 0-250°C • 0.1-30KOhm

1°C 0.1KOhm


Choose the desired temperature set point for Sensor # 2 Alarm.

• 0-250°C • 0.1-30KOhm

1°C 0.1KOhm



• 0-250°C • 0.1-30KOhm

1°C 0.1KOhm


Choose the desired temperature set point for Sensor # 3 Alarm.

• 0-250°C • 0.1-30KOhm

1°C 0.1KOhm

TEMP. 3 LEVEL 2 130 deg.cC


• 0-250°C • 0.1-30KOhm

1°C 0.1KOhm

UNSTABLE CURRENT 5% of FLC

Current fluctuation exceeding pre-set value Delay: 120 sec

1-10% of Motor FLC 1%

Parameter Settings

14

Figure 4 - Overload Protection - Cold Motor Figure 5 - Overload Protection - Hot Motor (hot/cold ratio = 0.5)

I/In1098765432

11

2

3

45

6

10

100

1000

10000

Tim

e (S

ec)

t6x=120

t6x=60

t6x=30

t6x=20

t6x=10

t6x=5

I/In

1098765432

1

1

2

3

4

56

10

100

1000

10000

Tim

e (S

ec)

t6x=120

t6x=60

t6x=30

t6x=20

t6x=10t6x=5

100

Parameter Settings

15

Actual Unbalance (%)

1009080706050403020101

2

3

45

10

120

1000

Para

met

er: U

/B L

VL

2 M

ax T

ime

(Sec

)

80

60

40

20

Figure 6 - Unbalance Protection

Unbalance Level Value Selection: Diagonal selected line intersects with the vertical axis at U/B LVL 2 MAX T, as set at Protection Settings page. Unbalance greater then Unbalance LVL 2 will Alarm / Trip after time delay that depends on the severity of the unbalance and the selected curve. Example: Assume that the user requires the MPR-6 to trip the motor at 40% Unbalance current after a delay of 5 sec. The intersection point of 5 sec and 40 % is on a diagonal line which intersects the X axis at 80 sec. Hence, set U/B LVL 2 MAX T parameter to 80 sec. Please note that at 60 % unbalance the MPR-6 will trip after approximately 2.5 sec. Unbalance LVL 2 parameter will set the lower threshold under which the MPR-6 will not trip.

Additional Protection

Parameter & Default Value Description Range

PHASE SEQUENCE No

Fault occurs when the phase sequence is reversed. Phase sequence is tested only for short period after starting. Detection of wrong phase sequence accomplished in less then 0.5 Sec. Note: The phase sequence is designed to operate properly only in DOL starting. If for example motor is started by electronic soft starter, VFD, etc. Phase Sequence protection must be set to Off.

Yes / No

EXTERNAL FAULT 1 If config. input 1 is set to Ext. Fault 1 N/O then Fault occurs when In.1 and common input terminal contact closes. If config. input 1 is set to Ext. Fault 1 N/C then Fault occurs when Programmable Input-1 contact opens.

EXTERNAL FAULT 2 If config. input 2 is set to Ext. Fault 2 N/O then Fault occurs when Programmable Input-1 contact closes. If config. input 2 is set to Ext. Fault 2 N/C then Fault occurs when Programmable Input-1 contact opens.

INTERNAL FAILURE The MPR-6 incorporates a built in Test program. The test program is constantly running in the background. Fault occurs when the MPR-6 detects an internal fault.

Communication Port Failed

Fault occurs when the MPR-6 detects three consecutive transmissions from the host computer, in which a parity bit, and/or the CRC word are wrong. Auto reset, when Enabled, occurs when a transmission from the host computer is received properly.

Trip / Alarm Options

16

Protection function Each of the MPR -6 Protection has five setting: 1. Trip 2. Alarm 3. Auto Reset 4. Relay C 5. Relay D

With this five setting any the MPR-6 protection can be assigned to each of the following functions : 1. Trip only 2. Alarm only 3. Alarm and Trip 4. Disabled 5. Enabling Auto Resetting 6. Operating Aux relay C 7. Operating Aux relay D

When Trip only is required 1. Set Trip: Enable, Alarm: Disable. Upon fault:

• Trip LED illuminates. • Trip relay: if designated as "Trip", energizes. if

designated as "Trip-Fail Safe", de-energizes. • Relays C and/or D (if assigned to function in this

fault) energize. 2. When Alarm only is required set Trip: Disable,

Alarm: Enable. Upon fault: • Alarm LED illuminates. • Alarm relay: De-energizes (fail-safe operation) • Aux relay C and/or D (if assigned to function in

this fault), energize. 3. When Alarm and Trip are required set Trip:

Enable, Alarm: Enable. Upon fault: • Trip and Alarm LEDs illuminate. • Trip relay: if designated "Trip", energizes. if

designated to "Trip-Fail Safe", de-energizes. • Alarm relay: De-energizes (fail-safe operation) • Aux relays C and/or D (if assigned to function in

this fault) , energize. 4. To Disable this protection set Trip: Disable, Alarm:

Disable 5. Operating Aux relay C

The relay can be assigned for one or more of the 20 faults. It will operates for a certain fault only if Trip or Alarm are enabled.

6. Operating Aux relay D The relay can be assigned for one or more of the 20 faults. It will operates for a certain fault only if Trip or Alarm are enabled.

External Faults External Fault 1 occurs when input 1 is set as “External Fault 1 NO” and the MPR detects a closed circuit between In.1 and common input terminals. External fault 1 occurs when Input 1 is set as “External Fault 1 NC” and the MPR detects open circuit between the “In1” and the “Common” input terminals. More than One Alarm or Trip. The MPR-6 is designed to accept and store the first Alarm it detects. If this alarm has not been reset and an additional alarm occurs, the MPR-6 will not display the second alarm on the LCD nor assign it to the Fault Data page. Example: If "Unbalance Level 1" occurs and then a "Thermal Level 1" occurs, the MPR-6 will continue displaying "Unbalance Alarm" message on both LCD and Statistical Data page. This is to assist the user in establishing the cause of the alarm. In case a trip occurs after an alarm, the trip message will override the alarm message. Resetting Reset after fault can be either through the Reset key on the front panel or remotely through Input -1 or 2, when designated as Remote Reset, or through the Serial link. The MPR-6 can also be assigned to have Auto Reset Auto Reset - When required set "Auto Rst: Enable" If not required set "Auto Rst: Disable" The MPR-6 resets itself automatically when the fault cause disappears. The Auto Reset is activated after a 2 sec. delay. Note: It is recommended to avoid unnecessary Autoreset On some faults, when Auto Reset is enabled, the MPR-6 trips and after a 2 sec. delay resets itself automatically. The fault message on the LCD disappears after 2 sec. Example: On "U/C Level 2", when Auto Reset function is Enabled, the contactor opens. After 2 sec. automatic Reset occurs. The motor stops and the "U/C Level 2" message is displayed for only 2 sec. Thermal Capacity Reset method (to enable emergency restart) Due to the importance of the Thermal protection a different reset method is used. Thermal Capacity fault can be reset only from the front panel Reset key. It is not possible to reset this fault through Input-1 or Input-2 and not through the communication. It is impossible to reset a "Thermal Level 2" condition until "Thermal Capacity " has reduced bellow 50%. If urgent starting is needed (while parameters lock=N0), before thermal capacity has reduced below 50%, press Reset key. The LCD will display: "Reset Thermal Capacity??? Pressing Reset key again after 1 second resets the Thermal Capacity.

Setting Summary

17

The following table summarizes the ranges and factory default settings for each of the parameters. New settings can be marked in the empty spaces ( ). In this table, (+) stands for "Enabled", (-) for "Disabled" and - to not applicable. Motor Number (___________) Application Name (____________________________________________)

Parameter No. Function Name Range Default

Settings Field Settings

1 Line frequency 50-60Hz 50HZ 2 Motor FLC 1-1000A 100A 3 C/T Primary 1-1000A 100A 4 GND C/T Primary 1-1000A 100A 5 Trip Inhibit 400-1000% FLC, Off Off 6 Config. Trip Relay Trip/Trip - Fail-safe Trip 7 Config Input 1 Reset, Ext Fault N.O or N.C Reset 8 Config Input 2 Reset, Ext Fault N.O or N.C Reset

9 Config. Anlg Out 0-20mA normal,4-20mA normal,0-20mA inverted, 4-20mA inverted

10 An. Out Parameter

Motor Load Current, Max of I1,I2,I3, I1, I2, I3, Ground Current, T1,T2,T3, Min. of T1,T2,T3, Max. of T1,T2,T3, Thermal Capacity,

Motor Load Current

11 An. Out Ful Range 10..250 % of FLC (message changes according to an. Out Parameter setting).

200% of FLC

12 Parameters lock Yes / No No 13 Address No 1-247, 248=Off 248 14 Baud Rate 1200-19200 19200

Syst

em P

aram

eter

s Set

tings

15 S.Link Par. Save Disable, Enable Disable 21 Max Start Time 1-250 sec 10 sec 22 No of Starts 1-10 10 23 Starts period 1-60 min 30 min 24 #St Auto Rst Dly 1-60 min 15 min 25 U/C Level 1 10-90% FLC 50 % 26 U/C Level 1 delay 1-60 sec 2 sec 27 U/C Level 2 10-90% FLC 40 % 28 U/C Level 2 delay 1-60 sec 5 sec 29 Load Increase 60-150% FLC 120 % 30 O/C Level 1- (Jam) 100-500% FLC 400 % 31 O/C Level 1 delay 0.5-10 sec 2 sec 32 O/C Level 2 - (Short) 400-1200% FLC 800% 33 O/C Level 2 delay 0-4 sec 0.5 sec 34 Overload pickup 60-130% FLC 105 % 35 Thermal Level 1 50-99% FLC 80 % 36 t6x (curve selection) 0.5-120 sec 10 sec 37 Hot to Cold Ratio 20-100% 50 % 38 Cool Time Factor 1-15 5 39 Unbalance Level 2 10-40% of FLC 15% 40 Unbalance Min T 1–30 sec 5 sec

Prot

ectio

n Se

tting

s

41 U/B Level 2 Max T 20-120 Sec 30 sec

Setting Summary

18

42 G/F Level 1 1-100% FLC 5 % 43 G/F Level 1 delay 1-60 sec 10 sec 44 G/F Level 2 1-100 % FLC 10 % 45 G/F Level 2 delay 0-2 sec 0.5 sec 46 G/F During Strt 1 – 100 % of FLC 100 % 47 CH 123 Sensor NTC, PTC, PT100 PT100 48 Temp. 1 Level 1 0.1-30K / 1-250°C 10K / 100°C 49 Temp. 1 Level 2 0.1-30K / 1-250°C 13K / 130°C 50 Temp. 2 Level 1 0.1-30K / 1-250°C 10K / 100°C 51 Temp. 2 Level 2 0.1-30K / 1-250°C 13K / 130°C 52 Temp. 3 Level 1 0.1-30K / 1-250°C 10K / 100°C 53 Temp. 3 Level 2 0.1-30K / 1-250°C 13K / 130°C

54 Unstable Current 1-10 % FLC 5 %

Setting Summary

19

Trip/ Alarm Options:

Trip Alarm Auto Reset Relay C Relay D Protection

Description Dflt New Dflt New Dflt New Dflt New Dflt New ANSI Code Standards

1 Max Start Time - + - - - 48 2 Too Many Starts - - - - - 66 3 U/C Level 1 - + - - - 37 4 U/C Level 2 - - - - - 37 5 Load Increased - + - - - 51L 6 O/C Level 1-Jam + + - - - 51R 7 O/C Lvl 2 - Short + + - - - 50 8 Thermal Level 1 - + - - - 49S/51 9 Thermal Level 2 + + - - - 49S/51

10 Unbalance Lvl 1 - + - - - 46 11 Unbalance Lvl 2 + + - - - 46 12 Phase Sequence - - - - - 47 13 GND Fault Lvl 1 - + - - - 50G, 64 14 GND Fault Lvl 2 + + - - - 50N, 64 15 Comm. Port Fail - - + - - 3 16 Internal Failure - + - - - --- 17 External Fault 1 - - - - - --- 18 External Fault 2 - - - - - --- 19 Temp.1 Level 1 - - - - - 49R 20 Temp.1 Level 2 - - - - - 49R 21 Temp.2 Level 1 - - - - - 49R 22 Temp.2 Level 2 - - - - - 49R 23 Temp.3 Level 1 - - - - - 49R 24 Temp.3 Level 2 - - - - - 49R 25 Unstable Current - - - - - ---

Note: Disable = “-“, Enable = “+”

Actual Data

20

To enter Actual Data press Page key until Actual data header is displayed Note: Values given below are examples only.

ACTUAL DATA - -

Parameter & Example Value Description Range

I1 I2 I3 345 343 346 A

Line (motor) currents. 1A - 12KA.

GROUND CURRENT 0 Amp.

Ground fault current. 1A - 12KA

T1 T2 T3 95 93 96 °C

RTD Measured °C / Thermistor measured resistance. Note: if Thermistor/RTD is not connected LCD shows: ?????

RTD 1-250°C Thermistor 0.1- 30K

MOTOR LOAD CURR. 90 % of FLC

Motor current as a percentage of Motor FLC. 0 - 1200% FLC

UNBALANCE CURR. 1%

Unbalance current, the difference between max. and min. of motor's three line currents, related to the larger between motor's max. line current and Motor FLC.

0 - 100%

THERMAL CAPACITY 20% of Capacity

Thermal register capacity. Trip level = 100% 0-250% of max. Thermal Capacity

TIME TO TRIP- O/L No Trip Expected

Expected time to trip (reaching 100% Thermal Capacity) at the present current value.

No trip expected, 0 - 4 hours

TIME TO START 0 sec.

Expected time to re-start is displayed on the LCD in one of the following cases: * After "Thermal Trip" - in this case it is the expected time of

the Thermal Capacity to decay to 50% of its the maximum "Thermal Capacity".

* After "Too Many Starts" Trip - it is the time until Auto Reset will be performed (if enabled)

After "Thermal Trip": 0 - ... minutes After "Too Many Starts" : 1 - few hours.

CURRENT FLUCTUAT 5%

Current fluctuation exceeding pre-set value Delay: 120 sec 1 - 10%

Statistical Data

21

STATISTICAL DATA - -

Parameter & Example Value Description Range

LAST STRT PERIOD 5.6 sec.

Last start time duration. 0-255 seconds.

LAST START MAX I 550 amp.

RMS maximum current (highest of three phases) during last start. 0-24000 amp.

LAST TRIP Temp. 1 Level 2

Last active fault that was Enabled as a Trip. all 20 faults

LAST ALARM Temp. 1 Level 1

Last active fault that was Enabled as an Alarm. all 20 faults.

TRIP I1, I2, I3 110 112 109 A

Values of three line (motor) currents before last trip. 0-12000 amp.

TRIP GND CURRENT 0 amp.

Values of Ground Fault current before last trip. 0-12000 amp.

TRIP T1, T2, T3

125 123 126 °C

Values of thermal sensors before last trip. R1-R3 for Thermistors and T1-T3 for PT100 RTDs

RTD 1-250°C Thermistor 0.1- 30K

TOTAL RUN TIME 10137.5 hours

Total run time since commissioning. 0-60,000 hours.

TOTAL # OF START 1017

Total number of starts since commissioning. 0-65535

TOTAL # OF TRIPS 12

Total number of trips since commissioning. 0-65535

Test Messages

22

SERVICE OPTIONS

Parameter & Example Value Description

PROGRAM VERSION MP3171003-Modbus

Program version description.

STORE NOW ? Default settings

Stores All factory default parameters in the non-volatile memory. Press Store and Set Page keys simultaneously, to store. "Data Saved Ok" message will be displayed for about two seconds. Resets and stores "0" for all the statistical data. Press Reset and Store keys simultaneously, to reset and store zero values in the non-volatile memory. The parameters are: Total run time, Total # of starts, Total # of trips, Last start period, Last start peak I, Trip I1, I2, I3, Trip GND current, Trip T1,T2,T3, Thermal capacity “ Data Saved OK" message will be displayed for about two seconds.

CLEAR Statistical Data

Warning Resetting Statistical Data resets all previous statistical data values ! ! ! The last two actions (default storing and resetting statistical data ) should be done with care, since retrieving previous set-point parameters or statistical data is impossible.

Flash & Constant Messages

23

Flash Messages The message is displayed for a short while only. Display than returns to the previous message. Flash messages are usually displayed as a response to an operator action. It is used either to confirm activation of the requested operation, or to indicate reason for not doing so.


DATA SAVED OK

Displayed after pressing Store key. If an error is found during store process, then next message is shown.

STORAGE ERROR

Displayed when an error is found in the store process.

WRONG PARAMETERS

Displayed after power-up, if the non-volatile parameter check sum is found to be wrong.

UNAUTHORIZED ACCESS

Displayed when Parameters lock is set to yes, and a parameter change is attempted. Also displayed after Unauthorized Store action.

RESET THERMAL CAPACITY ???

Displayed as a response to pressing Reset key while parameters lock is set to No. It indicates that a second press on Reset key after 1 Sec. will reset thermal capacity to 0. Note : This should be done with care !! Resetting Thermal Capacity may prevent the MPC from tripping for thermal overload while justified

THERMAL CAPACITY RESET PERFORMED

Displayed after second press on Reset Key, as explained in the previous message.

INTERNAL FAILURE Displayed as a response to finding an error during an Internal Test. Constant Messages Displayed, as a response to an event and not as a result of an operator action.


ALARM THERMAL LEVEL 1

Displayed when the Alarm LED illuminates. The lower line displays the fault name.

TRIP THERMAL LEVEL

Displayed when the Trip LED illuminates. The lower line displays the fault name.

Communications Communications Manual is supplied upon request

24

The MPR-6 incorporates RS485 serial link and uses a Modbus RTU protocol (The protocol is not included in this document) to provide high-speed data acquisition to supervisory computers. Data formats have been carefully structured to provide fast notification of alarms and continuous updates of performance parameters. Load control can be performed from host computers or by PLCs. The following can be performed through the communication. • Read and modify all MPR-6 Settings • Read all Actual and Statistical Data parameters • Reset System security is exceptionally high, meeting the highest standards of protected communication in the industry. Included in each message is a 16 bit CRC. RS-232 to RS-485 Converter

For programming and supervision of single units via a PC/Laptop or compatible.

Small System Up to 32 MPRs can be connected to the PLC or host computer via a twisted shielded pair. Note: Terminate serial link cable with 120-Ohm resistors at both ends. The MPR-6 system is user expandable. No special engineering skills or tools are required. For larger systems a Data Highway enables multiple MPR-6 connection. The system also performs high-speed data acquisition Users therefore have a simple and friendly means of building a fully integrated monitoring and control systems An optional basic communication package is available. The package includes: 1. Parameter Reading and Programming Software 2. Connection cable and RS-232 to RS-485 Converter 3. Modbus Communication Manual

MPR-6

MPR-6 Modbus Communication

SET-PRO Software

Twisted Shielded Pair

Technical Specifications

25

Auxiliary Power Supply 230VAC (165 - 260V), 115VAC (88 - 125V), (to be specify). 45 to 65Hz. Consult factory for universal AC/DC power supply. Power consumption: ≤ 10VA Current Measurement (three currents) Method : True rms, sample time 0.5mS. Range: 0.05 to 12 * phase CT Primary amps setting. Full scale: 12 * phase CT Primary amps setting. Accuracy : ± 1.5% , for 0.9 to 1.5 * CT Primary amps setting.

± 5% above 1.5 * CT Primary ± (3% + 0.02 * CT Primary) below 0.9 * CT Primary

Power consumption: ≤ 0.1VA per 1A at 1Amp. input, (Input impedance ≤ 100mΩ) ≤ 0.5VA per 5A at 5Amp. input, (Input impedance ≤ 20mΩ)

Ground Fault Current measurement (one current) Method : True RMS, sample time 0.5mS. Range: 0.05 to 1.0 * E/F CT Primary amps setting. Full scale: 1.0 * E/F CT Primary amps setting. Accuracy : ± 3% of full scale. Power consumption: ≤ 0.1VA per 1A at 1Amp. input, (Input impedance ≤ 100mΩ)

≤ 0.5VA per 5A at 5Amp. input, (Input impedance ≤ 20mΩ) Thermistor Input RTD Input Range: 0.1 - 30KΩ. Range: 100 - 240Ω or 0°C - 250°C Accuracy: ± 0.1KΩ up to 5KΩ, ± 3% above 5KΩ. Accuracy: ± 3% of resistance. Time Delay 2 Sec. Max wire resistance: 25Ω. Time Delay 2 Sec. Overload Alarm and Trip Curves (both heating and cooling) Fault time accuracy: ± 1 Second up to 10 seconds.

± 1 second ± 2% above 10 seconds. Threshold current level : OVERLOAD PICKUP ± 1.5%. Total Run Time Accuracy: ±2%. Current Unbalance Alarm and Trip Method: Unbalance = 100 * (Imax - Imin) / Ir [%] Where: Imax = max. of the three phase currents.

Imin = min. of the three phase currents. Ir = larger of (Imax , Motor FLC setting).

(to prevent nuisance tripping at low current levels) Alarm Threshold unbalance alarm level: 50% of Unbalance Current setting ± 2%. Alarm (fixed) time delay: 1.0 ± 0.5 Sec. Trip Curves Threshold unbalance trip Level: Unbalance Current setting ± 2%. Trip time accuracy: ± 1 Second up to 10 seconds. ± 1 second ± 2% above 10 seconds.

Technical Specifications

26

Fault Time Delays Accuracy: ±0.5 Sec. or ±2% of time, which ever is greater, for all but the above mentioned faults and the

following exceptions: - O/C Level 2: -0.1/+0.2 Sec. for less than 1Sec. delay.* - Ground Fault Level 2: -0.1/+0.2Sec. for less than 1Sec. delay.* * When adjusted to 0 60 ט mS ± 30mS.

Relays Contacts Rated load: 8A/250VAC 1800VA. 48Vdc, 0.25A Inductive 48Vdc, 1.0A Resistive Maximum voltage: 250VAC. 125Vdc, 0.15A 125Vdc, 0.4A Dielectric Strength 1500VAC, for 1 minute, Between Ground (terminal 18) and:

* Current inputs. * Auxiliary power supply inputs * Control terminals

Temperature Range 0°C to +50°C (default - all units), -10°C to +60°C (by special order) Standards Impulse : Meets IEC 255-4 (1976) & Amend #1 (1979)

Meets IEC 255-5 (1977) 5 kV common-mode test

5 kV transverse-mode test Surge withstand :

Oscillatory 2.5 kV peak Fast transient 4 kV crest voltage In accordance with: ANSI C37.90.1 (1990), IEC 55-4 (1976) & Amend #1 (1979) Class III, IEC 255-22-2 (1988) Class III

RFI : In accordance with EMI standard ANSI C37.90.2

Dimensions (mm)

27

C:\WINDOWS\Desktop\MPR-6-3-Instruction Manual-27-07-2003.doc

86.4

107Cut-Out

92

138

144

96

Documents

MPR-6/3 - Mikro Kontrolmikrokontrol.rs/proizvodi/pdf/MPR-6-3-Instruction Manual.pdf · Up to 32 MPR-6 relays can be connected on the same ... Notes: 1. Leave terminals ... In the