ETM1L Series Molded Case Residual Current Circuit Breakers

Scope of Application

The ETM1L series residual current circuit breakers (hereinafter referred to as “circuit breakers”) are primarily designed for use in AC 50 Hz, with a rated operating voltage of 400 V and a rated current up to 800 A. They are used to provide indirect contact protection for personnel, prevent ffre hazards caused by ground fault currents resulting from equipment insulation failure, distribute electrical energy, and protect power supply equipment from overloads and short circuits. They may also be used for infrequent switching of circuits and infrequent starting of motors.

Applicable Standards

IEC 60947-2 GB/T 14048.2

Note: When placing an order, customers must clearly specify the circuit breaker model, speciffcations, and included accessories. When using undervoltage trip units or shunt trip units, the operating voltage (or control power supply voltage) must be speciffed.

For example: 1. To order an ETM1L-125M four-pole circuit breaker for power distribution with a rated current of 50A, “0” arc suppression, a manual operating mechanism, a shunt trip unit (AC380V), auxiliary contacts, alarm contacts, and 20 rear-panel terminals: The order should be written as: ETM1L-125MZ/4348, In=50A, “0” arc, shunt trip unit AC380V, rear panel wiring, 20 units.

Model and meaning

ETM1L	125	L	P
Name	Frame Grade	Breaking Capacity Code	Operation Mode Code
ETM1L Series Molded Case Residual Current Circuit Breaker	125 250 400 630 800	L M H	Direct control via joystick (no code) P: Electric operation Z: Controller operation

3	3	10	2	100
Poles	Name of the trip device	Attachment Code	Purpose Code	Rated current
2P 3P 4P	2: Electromagnetic trip unit 3: Double-pole trip unit 0: No protection (For isolation only)	Attachment Code	Circuit breakers used for power distribution have no code; circuit breakers used to protect motors are designated by the number 2.	10A~800A

MainTechnical Speciffcations

Model No.		ETM1L-125L	ETM1L-125M	ETM1L-125H	ETM1L-125L	ETM1L-125H	ETM1L-125M	ETM1L-400L	ETM1L-400M	ETM1L-400H	ETM1L-630L	ETM1L-630M	ETM1L-630H	ETM1L-800L	ETM1L-800M	ETM1L-800H
Poles		2	3	4	2	3	4	3	4		3	4		3	4
Rated current In（A）		10、16、20、25、32、40、 50、63、80、100、125			100、125、160、180、200、225、 250			225、250、315、350、400			400、500、630			630、700、800
Rated operating voltage (V)		400
Rated short circuit breaking capacity	Icu(kA)	35	50	85	35	50	85	50	65	100	50	70	100            50		70	100
	Ics(kA)	25	35	50	25	35	50	25	35	50	25	35	50             25		35	50
Rated residual operating current I △ no(mA)		30/100/300 (Non-delayed)	100/300/500 (Delay-type)		100/300/500			100/300/500			100/300/500			100/300/500
Maximum interruption time (s)		≤ 0.1 (Non-delayed)	≤ 0.1/0.4/1 (Delay-type)		≤ 0.1/0.4/1			≤ 0.1/0.4/1			≤ 0.1/0.4/1			≤ 0.1/0.4/1
Arc length (mm)		≤ 50						≤ 100
Dimensions (mm)	Length L	150			165			257			280			280
	Width W	62	92	122	75	107	142	150	198		210	280		210	280
	Highth H	94	110		94	110		146			155			155