What Is A Three-position Circuit Breaker? Overview Of Three-position Circuit Breaker

The Lv Pole Mounted Circuit Breakers product integrates vacuum circuit breakers, disconnectors, grounding switches, and sensors; the HNV1-12GD product is designed as a side-mounted product, which conforms to the trend of miniaturization and is suitable for cabinet sizes of (500×1000×1800). The HNV1-12GD three-position vacuum circuit breaker is suitable for products used in 6-12kV medium-voltage power grids. The side-mounted solid-sealed indoor high-voltage three-position vacuum circuit breaker has excellent electrical and mechanical properties, reliable and stable mechanisms, and long service life. The main circuit adopts solid-sealed poles, which enriches the environmental adaptability and insulation reliability of the circuit breaker; reliable mechanical and electronic performance, extended mechanical life and electronic life, make maintenance-free circuit breakers possible.

Traditional high-voltage fixed switchgear XGN2 or XGN66, etc., need to install isolating switches, vacuum circuit breakers, grounding switches, sensors separately in the complete set factory, install and debug mechanical interlocks, which are complex processes, time-consuming, and require high technical skills of workers. After using this product, it is equipped with a multifunctional vacuum circuit breaker. The switch body has an isolation position, a circuit breaker position, and a grounding position, which is more integrated and systematic, and the installation is simple, fast, convenient, and reliable.

Detailed description of three-position circuit breakers and three-position vacuum circuit breakers

The three-position can be operated manually or electrically:

HNV1-12GD manual operation

1. Use a special energy storage handle to store energy.

2. Closing: engage the gate button. (If it is equipped with a closing lock or undervoltage device, the secondary circuit must be energized before closing)

3. Opening: press the opening button.

HNV1-12GD electric operation

1. After the secondary circuit is energized, the energy storage mechanism automatically stores energy.

2. Closing: Press the closing button in the control circuit.

3. Opening: Press the opening button in the control circuit.

When inspecting high-voltage vacuum circuit breakers, pay attention to the following points: 1. When using vacuum circuit breakers for electrical testing, you must first carefully implement the operation monitoring system, one person operating and one person monitoring.

2. The operator is in front and the guardian is behind.

3. When using vacuum circuit breakers, it is necessary to pay attention to the fact that its rated voltage must be compatible with the voltage level of the electrical equipment being tested, otherwise it may endanger the personal safety of the operator or cause misjudgment.

4. Do not expose it to the sun in the open air. It should be kept in a dry and ventilated place. Do not wipe or contact it with corrosive chemical solvents and detergents.

5. The insulating part refers to the part from the metal connection screw at the bottom of the indicator to the cover guard ring, and the handshake part refers to the part below the cover guard ring. The lengths of the insulating part and the handshake part are different according to the voltage level.

There are many combinations available: upper isolation and lower fuse, upper and lower double isolation, upper isolation and lower grounding, isolation without grounding.

Installation method: commonly used upright right operation and inverted left operation. Upright left operation and inverted right operation can be customized.