1、 Scope of application

C65 Circuit Breaker AccessoriesMN undervoltage release, MV overvoltage release, MN+MV overvoltage release, SD alarm contact, OF auxiliary contact are auxiliary functional components designed specifically for C65 circuit breakers. By providing overvoltage, undervoltage, and overvoltage detection to the power supply, they control the on/off of the circuit breaker, disconnect the distribution system circuit, or detect the circuit breaker signal. Can be used in conjunction with C65N, NB1 and other series circuit breakers.

2、 Model meaning and main technical parameters

product name	model	Rated working voltage Un	drop away voltage	Purpose:
Overvoltage release device	MV	230V	Overvoltage value Uvo=270V ± 5%	When the power supply voltage rises between 270V ± 5%, the circuit breaker trips to achieve overvoltage protection of the line.
undervoltage release	MN	230V	Undervoltage value Uoe=170V ± 5%	When the power supply voltage drops between 170V ± 5%, the circuit breaker trips to achieve under voltage protection of the line.
Overvoltage and undervoltage release device	MV+MN	230V	Overvoltage value Uvo=270V ± 5% Undervoltage value Uoe=170V ± 5%	When the rated power supply voltage of 220V rises to 270 ± 5% or drops to 170V ± 5%, the circuit breaker will trip to achieve line protection.
Alarm contact	SD	115/230/400V	1、3A	When the circuit breaker is disconnected due to a fault in the protected circuit, provide an alarm signal
auxiliary contact	OF	115/230/400V	1、3A	Provide auxiliary signals and control auxiliary circuits

Attachment Name		Rated insulation voltage Ui	Rated control power supply voltage Us	Release power consumption (W or VA)	pull-in voltage
MX+OF shunt release+auxiliary contact		415V	AC/DC： 220～380V； 110～220V	240	（0.7～1.1）Us
			AC/DC：24～48V	120
MX+OF shunt release+auxiliary contact	active	415V	AC/DC： 220～380V； 110～220V	240	（0.7～1.1）Us
			AC/DC：24～48V	120
	passive	415V	AC/DC： 220～380V； 110～220V	240	（0.7～1.1）Us
			AC/DC：24～48V	120
MX shunt release		415V	AC/DC： 220～380V； 110～220V	240	（0.7～1.1）Us
			AC/DC：24～48V	120

Attachment Name	Rated current (A)			Number of contacts per group
	AC：380V	AC：220V	DC：110V
Auxiliary contact OF	3	6	1	One normally open; A normally closed
Alarm contact SD	3	6	1	One normally open; A normally closed

3、 Appearance and installation dimensions

4、 Ordering Notice

When placing an order, please indicate the following points:
Product model and name: such asMV overvoltage release device
Supporting product: Chint NB1 circuit breaker matching
Order quantity: such as 3680 pieces.
Example of ordering:MN undervoltage release device，C65 Circuit Breaker Accessories3990 of them.