1.overview
The PWM Intelligent Measuring Circuit Breaker is a new type of low-voltageCircuit Breaker that integrates high-precision current sensors, measuring units, and protection units. It adopts a modular design concept that separates primary and secondary functions. The secondary module supports hot-swapping, allowing for flexible replacement and ease of maintenance. In addition to standard functions such as overload, undervoltage, and short-circuit protection, it also features power measurement, contact temperature protection, topological characteristic signal transmission and identification, voltage compliance rate statistics, power quality analysis, event logging, and real-time reporting. When paired with intelligent integration terminals for distribution networks, it can support the deepening application of the Internet of Things in distribution networks within the context of new power system scenarios.
2.Technical Specifications
|
Model |
PWM250 |
PWM400、630 |
|
Rated Frame Current Inm（A） |
250 |
400、630 |
|
Rated Current In（A） |
250 |
400、630 |
|
Overload Long Delay Setting Current Ir（A） |
80、100、125、160、200、250 |
160、180、200、225、250、280、315、350、375、400、450、500、560、630 |
|
Rated Operational Voltage Ue（V） |
AC400 |
|
|
Rated Insulation Voltage Ui（V） |
1000 |
|
|
Rated Impulse Withstand Voltage Uimp（kV） |
8 |
|
|
Number of Poles |
3 |
|
|
Rated Ultimate Short-Circuit Breaking Capacity Icu（kA） |
36 |
65 |
|
Rated Service Short-Circuit Breaking Capacity Ics（kA） |
25 |
50 |
|
Rated Short-Time Withstand Current Icw（kA/s） |
3 |
400：5；630:8 |
|
Usage Category |
A |
B |
|
Arc Distance（mm） |
50 |
100 |
|
Mechanical Life（cycles） |
7000 |
4000 |
|
Electrical Life (Cycles) |
1000 |
1000 |
|
Total (Cycles) |
8000 |
5000 |
3.operating environment
1.Operating Ambient Temperature: -40°C to +70°C, with an average temperature not exceeding +35°C within a 24-hour period.
2.Operating Ambient Humidity: Monthly average maximum relative humidity below 93%, with no condensation on the surface of the enclosure.
3.Operating Environment: No corrosive gases that could damage metals or insulation, no significant dust and mold, no sources of severe vibration or shock, and no materials posing fire or explosion hazards.
4.Altitude: Installation site altitude ≤ 2000m.
5.Storage and Transportation Extreme Ambient Temperature: -40°C to +75°C.