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Scope of Application

IC65N Circuit Breaker Accessories (MN Undervoltage Release, MV Overvoltage Release, MN + MV overvoltage-undervoltage Release, SD alarm contact, OF auxiliary contact), these MCB accessories are auxiliary functional components designed for C65 circuit breaker , by providing over-voltage, undervoltage and overvoltage-undervoltage detection to the power , to control the circuit breaker on and off, breaking distribution system circuit or detecting circuit breaker signals. The MCB accessories can be used in conjunction with C65N, NB1 series circuit breakers.

Model meaning and main technical parameters

Product Model Rated Voltage Un Drop away voltage Application
Overvoltage
Release
MV 230V Overvoltage value Uvo=270V±5%

To make the circuit

breaker tripping and achieve
over-voltage protection of the line
When the power supply

voltage rises to 270V ± 5%

Undervoltage
Release
MN 230V Overvoltage value Uoe=170V±5%


To make the circuit breaker

tripping and achieve
under-voltage protection of the line
When the power supply

voltage falls between 170V ± 5%

Overvoltage-
undervoltage
Release
MV+MN 230V Overvoltage value Uvo=270V±5%
Overvoltage value Uoe=170V±5%

To make the circuit breaker

tripping and protect the line
When the 230V rated power

supply voltage rises to
270 ± 5% or falls at 170V ± 5%

Alarm contact SD 115/230/400V 1、3A

To provide alarm signal

when the circuit breaker

breaking due to

protective circuits' fault

Auxiliary contact OF 115/230/400V 1、3A

To provide auxiliary

signal and control

auxiliary circuit

 

Accessory Rated insulation
voltage Ui

Rated control

supply voltage Us

Release power
wastage(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

 

Accessory Rated Current(A) Number of the contact
in each group
DC:110V AC:380V AC:220V
Auxiliary contact OF 3 6 1

Single Pole Normally Open(SPNO);

Single Pole Normally close(SPNC)

Alarm contact SD 3 6 1 SPNO;SPNC

Outline and installation dimensions


Keywords: Undervoltage Release , MCB accessories

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