Wenzhou Kinee Electrical Co., Ltd. is one of the most reliable manufacturers and suppliers of 3p motor protection circuit breaker in China. We warmly welcome you to wholesale 3p motor protection circuit breaker for sale here from our factory. All customized products are with high quality and competitive price.
Product Introduction
The KNV3ME is a 3P Motor Protection Circuit Breaker, a thermal-magnetic push-button controlled circuit breaker, operated by a push-button (marked "I" for start, "O" for disconnect). It features built-in short-circuit, overload, and phase loss protection, as well as isolation functions. It supports infrequent starting and disconnection of motors and automatically disconnects the circuit in case of a fault. Rated current ranges from 0.7A to 80A, with a breaking capacity of 35-100KA, conforming to IEC 947-2 and IEC 947-4-1 international standards.
Applicable scenarios: Suitable for circuits with AC voltage up to 690V, enabling infrequent motor starting control as a 3P Motor Protection Circuit Breaker. It can also be used for power distribution line protection and infrequent load switching. It cannot be used as an isolator.
Wiring method: Uses screw-clamp terminal wiring, making it more suitable for conventional installation scenarios. This 3P Motor Protection Circuit Breaker ensures reliable operation in motor control and distribution applications.
Technical Parameters
|
Parameter |
Standard |
Unit |
Value |
|
Model |
KNV3ME |
||
|
Utilization Category |
IEC947-2 |
A |
|
|
IEC947-4-1 |
AC-3 |
||
|
Rated Operational Voltage (Ue) |
IEC947-2 |
V |
690 |
|
Rated Insulation Voltage (Ui) |
IEC947-2 |
V |
690 |
|
Rated Operational Frequency |
IEC947-2 |
Hz |
50/60 |
|
Rated Impulse Withstand Voltage (Uimp) |
IEC947-2 |
kV |
6 |
|
Total Power Dissipation per Pole |
W |
2.5 |
|
|
Mechanical life (C.O.: Closing/Opening) |
C.O. |
100,000 |
|
|
Electrical life of AC-3 class loads |
440VIn/2 |
C.O. |
100,000 |
|
440VIn |
C.O. |
- |
|
|
Load Level (Max. Operating Rate) |
C.O./h |
25 |
|
|
Max. Conventional Thermal Current |
IEC947-4-1 |
A |
0.16...80 |
|
Rated Load |
IEC947-4-1 |
Continuous load |
|
Additional Information
|
Parameter |
Value |
|
Poles |
3P |
|
Connection type |
AC |
|
Utilization category |
AC class, conforms to IEC 60947-2 |
|
Network frequency |
50/60 Hz, conforms to IEC 60947-2 |
|
Motor power (kW) |
37 kW at 400/415 V AC, 50/60 Hz |
|
Breaking capacity (Icu) |
100 kA at 230/240 V AC, 50/60 Hz, conforms to IEC 60947-2 |
|
Rated operational short-circuit breaking capacity (Ics) |
100% at 230/240 V AC, 50/60 Hz, conforms to IEC 60947-2 |
|
Control type |
Push button |
|
Rated current (In) |
80 A |
|
Thermal overload protection setting range |
56...80 A, conforms to IEC 60947-2 |
|
Magnetic trip current |
1040 A |
|
Conventional thermal current (Ith) |
80 A, conforms to IEC 60947-2 |
|
Rated operational voltage (Ue) |
690 V AC, 50/60 Hz, conforms to IEC 60947-2 |
|
Rated insulation voltage (Ui) |
690 V AC, 50/60 Hz, conforms to IEC 60947-2 |
|
Rated impulse withstand voltage (Uimp) |
6 kV, conforms to IEC 60947-2 |
|
Phase failure sensitivity |
Yes, conforms to IEC 60947-4-1 |
|
Isolation function |
Suitable, conforms to IEC 60947-1 |
|
Power loss per pole |
8 W |
|
Mechanical life |
30,000 operations |
|
Electrical life |
30,000 operations at 415 V, In (AC-3) |
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