The primary and secondary combination megnetic controlled circuit breaker assemblies is an outdoor high-voltage switchgear with a rated voltage of 12kV and three-phase AC 50Hz. It is composed of a pole-mounted circuit breaker body, a feeder terminal (FTU), a voltage transformer or a power supply of capacitor power taking connected to each other through cables.
Product Overview
JRHZW□-12 primary and secondary combination magnetic controlled circuit breaker is an outdoor high-voltage switchgear with a rated voltage of 12kV, three-phase AC 50Hz. It is broken by a pole. It is composed of a pole-mounyed circuit breaker body, a feeder terminal (FTU), a voltage transformer or a power supply of capacitot power taking connected to each other through cables. The circuit breaker and FTU can realize the functions of "centralized feeder automation and local feeder automation". It has a complete set of functions of segmentation, contact and demarcation circuit breakers, and can collect three-phase current, zero-sequence current, three-phase voltage, and zero-sequence voltage, active power, reactive power and electrical energy collection and other functions. It is mainly used for breaking and closing the load current and short-circuit current of the 10kV distribution network in substations and power systems. It is more suitable for places that require rapid breaking.
Technical Parameters
| Item | Unit | Value |
| Rated voltage | kV | 12 |
| 1min power frequency withstand voltage (phase to phase, to ground /fracture) | kV | 42/48 |
| Lightning impulse withstand voltage (phase to phase, ground/fracture) | kV | 75/85 |
| Rated current | A | 630 |
| Rated Frequency | Hz | 50 |
| Rated short-circuit breaking current | kA | 20 |
| Rated short-circuit making current (peak value) | kA | 50 |
| Rated peak withstand current | kA | 50 |
| Rated short-time withstand current | kA | 20 |
| Rated short-term withstand time | s | 4 |
| Rated operating cycle | O-0.3s-CO-180s-CO | |
| Rated short-circuit current breaking times | times | 30 |
| Mechanical life | times | 10000 |
| Rated operating voltage of auxiliary circuit | V | DC24 |
| Operating mechanism opening time | Ms | ≤10 |
| Close current peak value | A | ≤25 |
| Opening current | A | ≤3 |
Note: When the altitude of the product use site is higher than 2000m, the insulation withstand voltage should be corrected accordingly.
Product features:
Simple structure: three-phase direct-acting structure, each Phase single-temperature independent permanent magnet mechanism
The performance of the permanent magnet material is stable and reliable, and the demagnetization temperature is >175℃
Ultra-low power consumption: Capacitor energy storage power
Fast and stable action: inherent opening time
Long life cycle: the mechanism has a service life of more than 20,000 times
Built-in high-precision electronic sensor : It has the characteristics of wide measurement range, good linearity, strong anti-interference ability, high measurement accuracy, small size and high reliability
It can be used as line segmentation, contact, branch, User boundaries and other occasions
The circuit breaker can be electrically closed and opened, and can be manually opened when the controller loses power
Optional integrated isolation knife gate
Product usage environment
Ambient air temperature: -40℃~+70℃
Altitude: Not exceeding 2000m
Installation location: A place free of flammable, explosive, chemically corrosive substances and frequent severe vibration
Safety pollution level: Level IV
Wind pressure: no more than 700Pa (equivalent to 35m/s sealing)
Note: When the above usage environment conditions are exceeded, please contact us
