ETM3EL Series Electronic Residual Current Circuit Breaker

Product Description

The ETM3EL series of Chinese-language LCD smart controllers are primarily designed for use with electronic residual current circuit breakers.

The controller utilizes a high-precision integrated 32-bit MCU chip for control, featuring 12-bit high-precision, high-speed A/D real-time data sampling, and integrates multiple protection functions into a single unit. The product integrates undervoltage and over-voltage protection (including phase loss, undervoltage, and zero-voltage loss on the power supply side), overcurrent protection (with current sensing and self-generating power functions), short-circuit protection, residual current protection, online real-time monitoring and display, optional automatic reclosing, RS-485 communication (supporting the DL/T 645-2007 multifunctional meter communication protocol or Modbus-RTU protocol), DI/O programmable remote switching control, multi-line fault record query, residual current operating curve recording, monthly switch operation data logging, and real-time remote data monitoring

Electrical Speciffcations

Controller rated operating voltage: AC 230 V / AC 400 V

Controller rated operating frequency: 50 Hz

Current signal processing range: 0.05 In to 14 In

Residual current range: 50–1000 mA (depending on the user-speciffed range)

Alarm output dry contact rating: AC 250 V/5 A (with alarm output function)

Trip current (transient): 9.5 V DC / 150 mA

Ambient temperature

Operating temperature range: -25° C to 75° C

Altitude: 2,000 meters or lower

Pollution Level: 3

Model and meaning

ETM3EL	3P	125	Y	4
Name	Poles	Frame Grade	Display options include	Protection features
ETM3EL Series electronic residual current circuit breaker	4P	125A 250A 400A 630A 800A	Chinese LCD Display (Y-Type)	4 (Three-stage protection) 5 (Three-stage protection, ±2% display accuracy)

Shape and size