Purpose of the devices
The BHA type Load break switches are designed to turn on and off sections of the three-phase alternating current circuit 400 and 630 A with a frequency of 50-60 Hz, rated voltage up to 10 kV, under load, as well as to ensure safe work on the disconnected section using stationary earthing devices. The PRBD-10 drive is designed for manual operation of the switch.
Environmental Conditions
· Suitable Altitude: 1000m ~ 4000m
· Suitable Temperature: -40℃ ~ +45℃
· Relative Humidity: Daily mean ≤95%, monthly mean ≤90%
· No conductivity dust.
· No insulation object with devastating metal and corrosive gas.
· No violent vibration or striking.
· No explosive danger or fire.
Technical Data
| Name | Unit | Date | |
| Rated Voltage | K V | 12 | |
| Rated Frequency | Hz | 50 | |
| Rated Current | A | 400 | 630 |
| Rated Short-Time Withstand Current (Thermally Stable Current) | K V | 12.5(4s) | 20(2s) |
| Rated Peak Withstand Current (Dynamic Steady Current) | K A | 31.5 | 50 |
| Rated Closed-Loop Breaking Current | A | 400 | 630 |
| Rated Active Load Breaking Current | A | 400 | 630 |
| 5% Rated Active Load Breaking Current | A | 20 | 31.5 |
| Rated Cable Charging Breaking Current | A | 10 | |
| Rated Breaking No-Load Transformer Capacity | 1250 | ||
| Rated Short Circuit Closing Current | K A | 31.5 | 50 |
| Load Current Breaking Times | Times | 20(100% Load) 35(60% Load) 75(30% Load) 80(5% Load) | |
| 1 min. Power Frequency Withstand Voltage (Effective Value) | K V | 42 Ground and Phase | |
| Power Frequency Withstand Voltage (Between Isolation Gaps) | K V | 48 | |
| Lightning Impulse Withstand Voltage (Peak) | K V | Ground and Phase 75, Isolation Fracture 85 | |
| Opening and Closing Operation Torque (Force) | N.m(N) | 90(180) | 100(200) |
