GB/T 42009-2022 in English
VALIDHigh voltage alternating-current circuit-breakers for filter banks
- Issued on:2022-10-12
- Implemented on:2023-05-01
- File Format:PDF
- Delivery:Via email within 5 business days
$476.00
《GB/T 42009-2022滤波器用高压交流断路器》由TC65（全国高压开关设备标准化技术委员会）归口，主管部门为中国电器工业协会。
Introduction
Overview of the core content of the standard
This standard applies to circuit breakers for outdoor AC filters with a rated voltage of 252kV and above and a frequency of 50Hz in converter stations of DC transmission systems, with a focus on regulating their frequent operation characteristics and adaptability to special working conditions.
Key Technical Characteristics
| Project | Conventional circuit breaker | Circuit breaker for filter |
|---|---|---|
| Rated operating sequence | O-0.3s-CO-180s-CO | O-180s-CO-180s-CO |
| Number of mechanical operations | M1 level (2000 times) | M2 level (10000 times) |
| Capacitive breaking test | Single capacitor bank test | BC1+BC2+FC+BCM quadruple test |
Special requirements for phase selection control
Phase-selective circuit breakers must meet the following requirements:
- Mechanical dispersion of closing time ≤±1ms
- Mechanical dispersion of opening time ≤±1ms
- Rated closing window 1~2ms
- Need to pass the additional test of GB/T30846-2014
Typical test parameters
Capacitive opening and closing testKey indicators:
- Test voltage: 1.3 times rated phase voltage
- BC1 test: 48 breaking operations
- BC2 test: 120 CO operation cycles
- Re-ignition is allowed but restriking is prohibited
Implementation suggestions
Special attention should be paid to the following in engineering applications:
- The pre-connection time of the closing resistor is 8~11ms, and the resistance error is ±5%
- Insulation correction is required when the altitude is >1000m
- The phase selection controller needs to pass the low-voltage power frequency verification test
- The handover test should include 20 mechanical property tests
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