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
