TYSEN-SAE Electrical Co., Ltd.|Electronic moulded case

Applicable scope

NYKM2E series electronic moulded case circuit breaker (hereafter referred to as circuit breaker), is one of new-type circuit breakers designed with CAD/CAM/CAE design, manufacturing technology, researched and developed. Its rated insulting voltage is 800V, applicable to AC 50Hz, rated working voltage till 400V, used for infrequent shift and infrequent motor start under rated voltage to 800A circuit. The circuit from rated working current to 800A is used as infrequent transferring and infrequent motor start.
Based on high and low breaking capacity (Icu) of its rated limit short-circuit, circuit breakers are divided into M type (relatively higher breaking type) and H type (high breaking type).
Circuit breakers can be installed vertically and horizontally.
Circuit breaker cannot have reversible incoming installation, namely, only 1,3 and 5 to connect power supply wires, 2,4 and 6 to connect load wires.
Circuit breaker applies to isolation, with symbol as "".

Selective cooperation: NYKM2E electronic moulded case circuit breaker has 3-section protection functions, Class-B circuit breaker and other circuit breaker protection devices connected to the same circuit have selective cooperation under short-circuit conditions;
It has 3-section protection action current and action time selection: User can do release setting adjustment according to load current requirements;
Self-powered: electronic release is supplied energy by circuit breaker itself, working power supply of current signal and release comes from current transformer installed inside circuit breaker;
"Pre-alarm" indication: when the actual running current flowing through circuit breaker reaches or exceeds pre-alarm action current Iro, “pre-alarm” LED on circuit breaker cover plate is in yellow;
Overload indication: when load current exceeds overload long-time delay action current, LED on circuit breaker cover plate is in red;
Large-current instantaneous release function: when circuit breaker closes or is operating, if it encounters short circuit large current (≥20Inm);

Type		NYKM2E-100		NYKM2E-225
Breaking capacity level		M	H	M	H
Rated current		16、20、25、32、、36、45、50、55、60、65、70、75、80、85、90、95、100		100、125、140、160、180、200、225
Number of poles		3P，4P		3P，4P
Rated insulation voltage		AC800V		AC800V
Rated working voltage		AC400V		AC400V
Rated limit short-circuit breaking capacity (Icu) (kA)	AC400V	65	85	65	85
Rated operation short-circuit breaking capacity (Icu) (kA)	AC690V	35	50	35	50
Rated short-time withstand current (Icu) (kA/1s)	AC400V	2		3
Cycle times of operation	Power on ON	8000
Cycle times of operation	Power off OFF	20000
Accessories	Under-voltage release	√		√
	Shunt release	√		√
	Auxiliary contact	√		√
	Alarm contact	√		√
	Motorized operating mechanism	√		√
	Rotary handle operating mechanism	√		√
	Wiring terminal	√		√
Installation and wiring mode	Front-panel	√		√
	Back-panel	√		√
	Plug-in type	√		√
	Draw-out type	—		—

Note: On right of “/” in width “W” is four-pole width