Product Description

The VS1(ZN63)-12 indoor high-voltage vacuum circuit breaker is widely used in substations, industrial and mining enterprises, commercial buildings, factory distribution rooms, and complete switchgear assemblies. Designed for medium-voltage (12kV rated voltage) indoor 50/60Hz AC power distribution systems, it serves as a critical modular component within the system.

Available in both fixed and withdrawable (truck-mounted) configurations, the unit is compatible with standard switchgear cabinets. It is one of the most widely used and versatile indoor vacuum circuit breakers in both domestic and international projects.

Featuring a compact, integrated design, the VS1(ZN63)-12 offers low-maintenance operation and a low failure rate. It is equipped with a high-performance vacuum interrupter that provides rapid arc-extinguishing capabilities and a long electrical service life, meeting the demands of frequent operation. Its fully enclosed design prevents dust accumulation, condensation, and surface discharge, ensuring reliability in harsh indoor operating environments.

Built-in advanced electrical and mechanical interlocking mechanisms eliminate safety hazards such as accidental opening/closing, closing with the grounding switch engaged, or entering live compartments, offering safety levels far superior to standard circuit breakers.

The VThe VS1(ZN63)-12 indoor high-voltage vacuum circuit breaker comes in various specifications to meet diverse power distribution and energy requirements. Each unit undergoes rigorous factory testing in accordance with IEC and national standards to ensure stable performance and superior quality.

The VS1(ZN63)-12 indoor high-voltage vacuum circuit breaker supports project customization, integration into complete equipment sets, and neutral packaging for export; standard tender documentation is also provided, making it an ideal choice for global power engineering and automation projects.

Product Specification

Parameter	Unit	Value
Rated Voltage	kV	12 / 24
Rated Frequency	Hz	50 / 60
Rated Current	A	1250, 1600, 2000, 2500, 3150, 4000
Rated Short-circuit Breaking Current	kA	20, 25, 31.5, 40, 50
Rated Short-circuit Making Current (peak)	kA	50, 63, 80, 100, 125
Rated Dynamic Withstand Current (peak)	kA	50, 63, 80, 100, 125
Rated Short-time Withstand Current (4s, r.m.s)	kA	20, 25, 31.5, 40, 50
Rated Short-time Withstand Duration	s	4
1min Power Frequency Withstand Voltage	kV	42 (12kV) / 65 (24kV)
Lightning Impulse Withstand Voltage	kV	75 (12kV) / 125 (24kV)
Mechanical Endurance	Times	30000
Operating Mechanism	-	Spring operating mechanism
Mounting Type	-	Withdrawable trolley type / Fixed type

Operating Environment Conditions

Ambient temperature: -10℃ ~ +40℃
Altitude: ≤1000 m above sea level. For sites over 1000m, insulation configuration can be customized.
Relative humidity: ≤95% at +20℃, no condensation allowed.
Installation location: indoor, no severe vibration or impact.
Surrounding air: free from flammable, explosive substances, corrosive gas and conductive dust.
No obvious water leakage, steam or salt mist inside the switch room.

FAQ

1. Q: What are the differences between the VS1 (ZN63) 12kV and 24kV models?

A: The 24kV model features an enhanced insulation structure, increased creepage distance, and higher withstand voltage capabilities. Its pole units and internal components have been redesigned to meet 24kV power-frequency and lightning impulse withstand voltage requirements; however, the mechanical operating principle remains the same as that of the 12kV version.

2. Q: Are these switches available in both withdrawable (mounted on a movable truck) and fixed configurations?

A: Yes. The switch body and spring mechanism are common to both types; by simply changing the base bracket, the unit can be installed as a fixed component in KYN28 switchgear or other types of cabinets.

3. Q: What are the characteristics of the spring operating mechanism?

A: The spring mechanism operates using stored mechanical energy; this eliminates the need for high closing currents and supports both AC and DC control power supplies. Due to its fast breaking speed and stable performance, it is suitable for distribution network automation and auto-reclosing applications.

4. Q: What is an "embedded pole"? What are its advantages?

A: An embedded pole is a single unit formed by encapsulating the vacuum interrupter and conductive connectors in epoxy resin, thereby isolating live parts from the air. This structure effectively prevents damage caused by dust, moisture, and pollution, making it suitable for indoor distribution rooms in harsh environments.

5. Q: Can older switchgear cabinets be retrofitted with this circuit breaker?

A: Yes. The VS1 is a standard, universal model; compatibility can be confirmed by comparing its dimensions with the original cabinet design. In most retrofit scenarios, only simple modifications are required, without the need to replace the entire cabinet.

Hot Tags: vs1(zn63) indoor vacuum circuit breaker, China vs1(zn63) indoor vacuum circuit breaker manufacturers, suppliers, factory