ZW8- 12, ZW8- 12G Outdoor High-voltage Vacuum Circuit Breakers

Category：

Outdoor High-voltage Vacuum Circuit Breakers
Browse number：

49
Release time：

2025-03-11 15:27:09
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Detailed Description

The ZW8-12/C series vacuum Circuit Breaker is an Outdoor High-voltage Switchgear with a rated voltage of 12KV and three-phase AC

50Hz. It is mainly used to open and close the load current, overload current, and sho比-circuit current of rural power grids, urban power

grids, and small power systems. The overall structure of this product is a three-phase common box type, with a three-phase vacuum arc

extinguishing type placed in a metal box. It uses SMC Insulation materials for inter phase insulation and ground insulation, with reliable peformance and high insulation strength.

ZW8-12G is a combination of ZW8-12 circuit breaker and isolation switch, called a combination circuit breaker, which can be used as a

segmented switch.

The operating mechanism of this series of products is the CT23 spring energy storage operating mechanism, which is divided into two types: electric and manual.

1.Main technical parameters

Number	Project	Unit	Parameter
1	Rated voltage	KV	12
2	Rated current	A	630(1250)
3	Rated short-circuit breaking current	KA	6.3	12.5		20
4	Rated short-circuit making current (peak)	KA	16	31.5		50
5	Rated peak withstand current	KA	16	31.5		50
6	Rated short-term withstand current	KA	6.3	12.5		20
7	Power frequency withstand voltage (dy)		42
	Lightning impulse withstand voltage (peak)		75
8	Rated operating sequence		Fen-0.3S-180S-Fen
9	Mechanical lifespan	Once	10000
10	Rated short-circuit breaking current breaking frequency	Once	30
11	Rated closing voltage of operating mechanism	V	AC、DC 110，220
12	Rated opening voltage of operating mechanism	V	AC、DC 110，220
13	Contact opening distance	mm	11±1
14	Ove比ravel (compression length of contact spring)	mm	3-		+1 -0.3
15	Three phase opening and closing asynchrony	ms	≤2
16	Contact closing bounce time	ms	≤2
17	Average opening speed	m/s	1.2±0.3
18	Average closing speed	m/s	0.6±0.2
19	Opening time	s	≤0.06
21	Closing time	s	≤0.1
22	Resistance of each phase main circuit	μΩ	≤200
23	Allowable wear accumulation thickness of dynamic and static contacts	mm	3

2.Outline and installation dimension diagram

Series outdoor Vacuum Circuit Breakers

Series Outdoor Vacuum Circuit Breakers

Note: If users have special requirements, they can negotiate with our factory to determine.

Installation Techniques for Circuit Breakers

Circuit Breaker Installation Tips

Installing a circuit breaker is crucial for safeguarding your electrical system. Proper installation ensures the safety of your home or workplace by preventing electrical hazards. Follow these essential circuit breaker installation tips for a secure and efficient setup.

1. Choose the Right Breaker

Before beginning the installation, ensure you choose the correct circuit breaker for your system. Consider the type of electrical system you have (single-phase or three-phase) and the amp rating that matches the wiring size. For instance, a 15-amp breaker should be paired with 14-gauge wire, while a 20-amp breaker needs 12-gauge wire.

2. Turn Off the Main Power

Safety is paramount when working with electricity. Always turn off the main power supply before installing a circuit breaker to avoid electrocution or damage to the electrical panel.

3. Check the Panel

Ensure that the electrical panel is in good condition. If it's old or damaged, it might be time for a replacement. The panel should be clean and free of debris to ensure proper breaker installation.

4. Insert the Circuit Breaker

Align the new circuit breaker with the slots in the panel. The breaker should snap into place securely. Make sure the breaker’s metal tab fits correctly into the panel’s bus bar.

5. Connect the Wires

Once the breaker is in place, connect the corresponding wires. The black (hot) wire should be attached to the terminal screw on the breaker. The neutral wire (usually white) should be connected to the neutral bus bar, and the ground wire (green or bare) should go to the ground bus bar.

6. Tighten the Connections

Ensure all wire connections are tight. Loose connections can cause electrical hazards like overheating or fires. Use a screwdriver to tighten each connection securely.

7. Test the Circuit Breaker

After installation, turn the main power supply back on and test the new circuit breaker. Flip the breaker switch to the "on" position and check if the connected circuit functions correctly. If the breaker trips immediately, recheck the wiring to ensure everything is correctly connected.

8. Label the Breaker

Once the circuit breaker is installed and tested, label it clearly. Labeling helps you identify the breaker’s function in Case of future maintenance or troubleshooting.

9. Regular Maintenance

Periodically check circuit breakers for signs of wear or damage. Over time, breakers may lose their effectiveness. If a breaker trips frequently, it may need to be replaced.

Conclusion

Installing a circuit breaker is essential for a safe and functional electrical system. By following these tips and prioritizing safety, you can ensure proper installation. Always consult a professional electrician if you’re unsure about the process to avoid mistakes and potential hazards.