EOCRPMZ-WRDUH Communication Motor Protector

EOCRPMZ-WRDUH Communication Motor Protector

‌EOCR-PMZ-WRDUHEquipped with comprehensive motor protection functions, it can effectively deal with various electrical faults and ensure the safe and stable operation of the motor. Its core protection functions cover three categories: basic protection, advanced protection, and intelligent warning.

1、 Basic protection function

• ‌overcurrent protectionProvide two modes: fixed time limit (0.2-30 seconds) and inverse time limit (adjustable from 1-30 levels) to adapt to different load characteristics.

• ‌Undercurrent protectionTo prevent abnormal operation of the motor due to light load or material breakage, the action time can be set (OFF, 0.2-30 seconds).

• ‌phase loss protectionWhen one phase of the three-phase power supply is missing, respond quickly within 3 seconds to avoid motor burnout.

• ‌locked-rotor protectionAbnormal increase in current detected during startup or operation, response time adjustable from 0.1 to 10 seconds.

• ‌Reverse protectionTo prevent the motor from starting in reverse, the action time is 0.1~0.3 seconds, suitable for unidirectional rotating equipment.

• ‌Current imbalance protectionWhen the three-phase current deviation exceeds the set value (adjustable by 5-50%), the protection will be triggered within 8 seconds.

• ‌stall protectionAbnormal decrease in speed detected during operation, action taken 0.5 seconds after D-Time

Overview of EOCR-PMZ

✔Higher measurement accuracy (1% level)

✔Built in dedicated MCU microcontroller unit

✔Protection functions: overcurrent, low current, phase loss, locked rotor, reverse, current imbalance, grounding, short circuit, and dual 4-20mA analog output

✔Modbus RS-485 communication function, supporting up to 200 large nodes

✔The protection current range of the main body is 0.5~100A, and the external CT can reach 6000A

✔Built in zero sequence current transformer ZCT, no external configuration required within 100A

✔Digital low-pass filtering function can prevent grounding protection misoperation

✔RTC clock can record fault time,

✔The current time characteristic has definite and inverse time limits that can be selected

✔digital display

♦ The three-phase main circuit current, short-circuit current, and grounding current are displayed in a 5-second cycle and can be displayed with a fixed phase

♦ Fault cause and current value display for easy troubleshooting

✔Three fault records, no data loss due to power outage

✔The running time setting can provide regular maintenance, such as replacing bearings, etc

✔Analog (4~20mA) signal output for centralized management of equipment

✔Ground fault (57-58) output contact status can be customized

✔Zero sequence current detection method can be used to measure the value of grounding leakage current and its operating characteristics can be selected

✔Reset direction: manual (RESET), power-off, and automatic reset

✔Power down modes N and R can be selected ★ Suitable for 20~400Hz frequency conversion environment

✔The terminals are detachable, and the terminal type and penetration type can be freely assembled

EOCRPMZ-WRDUH Communication Motor Protector

EOCR-PMZ protection function

✔Overcurrent (timed limit: 0.2... 30 seconds, inverse time limit: 1... 30 class)

✔Low current (OFF, 0.2... 30 seconds)

✔Phase loss (OFF, within 3 seconds)

✔Reverse (0.1... 0.3 seconds)

✔Current imbalance (8 seconds)

✔Stall (0.5 seconds after D-Time)

✔Blocked rotation (0.1... 10 seconds)

✔Grounding (0.05, 0.1... 10 seconds)

✔短路（0...20秒）

★ Two channel 4... 20mA analog output, current transmitter function

★ Modbu RS-485 communication function

Product Features of EOCR-PMZ

In 2001, in order to develop the company into an international and strategic enterprise, it subsequently joined Schneider Electric Group in France and was renamed Schneider Electric Korea Ltd in 2009. The product has also been renamed Schneider EOCR motor protector.