Technical Data
Product Overview

EKM8E and EKM8EL series electronic circuit breakers are applicable for low-voltage power systems of AC 50Hz, rated operating voltage up to 1000V and rated operating current from 16A to 800A.

Ambient and installation conditions

● Altitude up to 2000m;
● Ambient medium temperature should be within -5℃ to +40℃ (+45℃ for marine products);
● It can withstand the effect of damp air;
● It can withstand the effect of salt fog or oil mist;
● It can withstand the effect of moulds;
● It can withstand the effect of nuclear radiation;
● The max inclination is 22.5℃.
● It still can work reliably when the ship subjects to normal vibration;
● It can still work reliably if the product subjects to the earthquake (4g).
● Places where the surrounding medium is free from explosion danger, and far away from gas or conductive dust that would erode the metal or destroy the insulation;
● Keep away from rain or snow.

Product Features

● Circuit breaker can be equipped with undervoltage release, shunt release, auxiliary contacts, alarm contacts, electric operating mechanism, rotary operating handle and other accessories.
● Circuit breaker has protection functions of overload long delay, short-circuit short delay and short-circuit
instantaneous protection, the user can set the required protection characteristics (user only needs to operate the DIP switch for settings of protection function parameters).
● Circuit breaker has ground fault and thermal analog protection functions, pre-alarm indication over-current
indication, load current indication, digital current analysis technology, and it can achieve a higher level of protection.
● EKM8EL series is circuit breaker with residual current protection function.

Panel and function description
Intelligent release panel

Panel adjustment knob as follows in turn:

● IR(A) Isd(x IR) Ii(x IR)
● IR: Overload long delay tripping setting current; Isd: Short-circuit short delay tripping setting current;
● Ii: Short-circuit instantaneous tripping setting current;

The rest parameters are set by factory default, or set by remote communication, as follows:

● tR: Overload long delay setting time, factory default: 60s;
● tsd: Short-circuit short delay setting time, factory default: 0.1s;
● Ip: Overload pre-alarm setting current, factory default: 0.85*IR;

Intelligent communication port (COM):

Panel With Residual Current Protection

1： Setting current In overload indicator, the red light will go on when the operation current is ≥ 105% In
2： Pre-alarm current Ip indicator, the yellow light starts flashing when operation current is ≥ Ipx90%
3： When operation current is ≥ 60% xln setting current, the green light will go on
4： The code switch for residual current setting
5： The code switch for leakage action time setting

 Product Selection Guide

Main Performance Indexes 

Frame current (A)		160	250	400	630	800
Model		EKM8Е-160M	EKM8Е-250H	EKM8Е-400H	EKM8Е-630H	EKM8Е-800H
Pole number		3, 4	3, 4	3, 4	3, 4	3, 4
Rated current (A)		16-32, 40-125,80-160	16-32,40-125,80-160,100-250	200-400	200-400,300-630	300-630,400-800
Rated voltage (V)		AC400V
Rated insulation voltage (V)		AC1000V
Short-circuit breaking capacity(KA)Icu/Ics	AC400V	35/25	50/35	65/65	65/65	65/65
Operating cycle number	Electrical life	1500	1000	1000	1000	1000
	Mechanical life	7000	7000	4000	4000	4000
Outline dim(mm) a-b-c-ca
	3P	90-155-88-115	105-165-88-115	140-257-103-155	140-257-103-155	210-257-103-155
	4P	90-155-88-115	140-165-88-115	185-257-103-155	185-257-103-155	280-257-103-155
Weight (kg)	3P	1.8	2.1	5.5	5.7	5.7
	4P	2.3	2.6	7	7.5	7.5
Electric operating device (MD)		●
External driving operating handle		●
Automatic release		Electronic type

Changan Group Co.,Ltd

Add:No.288 Wei 17th Road, Yueqing Economic Development Zone, Yueqing, Wenzhou, Zhejiang Province, P.R.China
Tel:+ 0086-577-62763666 62760888
Fax:+0086-577-62774090
Website:https://www.changanelectric.com
Email:sales@changangroup.com.cn