Isolation Circuit Breaker Switch Under the Environmental Protection Cabinet

Isolation Circuit Breaker Switch Under The Environmental Protection Cabinet (1).png

The VHK-12 Circuit Breaker Switch is an advanced, high-performance device designed for use in environmentally friendly air-insulated ring network cabinets. It adopts a semi-sealed structure, ensuring uniform electric field distribution, reliable breaking performance, long service life, and maintenance-free operation. This circuit breaker serves as a key component in the cabinet, responsible for the main circuit's closing and opening functions, as well as handling rated load current and short-circuit current.

product details

PRODUCT PARAMETERS

NO	ITEM	UNIT	PARAMETERS	REMARKS
1	Rated Voltage	kV	12
2	Rated Current	A	630
3	Rated Breaking Current / Thermal Stability Time	kA/s	20/4 ；25/3
4	Rated Peak Withstand Current	kA	50/63
5	Rated Short-Circuit Closing Current	kA	50/63
6	Short-Circuit Closing Operations	次	30
7	Power Frequency Withstand Voltage: To Ground / Phase-to-Phase	kV	42
8	Power Frequency Withstand Voltage: Across Breaker Contacts	kV	48
9	Lightning Impulse Withstand Voltage: To Ground / Phase-to-Phase	kV	75
10	Lightning Impulse Withstand Voltage: Open Contact	kV	85
11	Main Circuit Resistance	μΩ	≤60
12	Arc Extinguishing Chamber Mechanical Life	order	10000
13	Isolating / Earthing Switch Mechanical Life	order	5000
14	Gas Box Pressure	bar	1.25

Isolation Circuit Breaker Switch Under The Environmental Protection Cabinet (2)

Structure and characteristics

Semi-Sealed Structure

Offers uniform electric field and enhanced reliability.

Durable and Long-Lasting

Designed for extended service life with no maintenance required.

Compact Design

Enables easy integration into air-insulated ring network cabinets.

High Breaking Capacity

Handles rated load and short-circuit current with precision.

Electrical Parameters

Rated Voltage: Customized according to specific model and application requirements, typically covering multiple voltage levels.

Rated Current: Various current options are provided based on design specifications to meet different load requirements.

Mechanical life: up to 10,000 times or more.

Operating Environment

Temperature: -15°C to +40°C (storage/transport allowed at -30°C).

Altitude: ≤ 2000 meters.

Humidity: Daily average relative humidity ≤ 95%; monthly average ≤ 90%.

Seismic Resistance: Maximum seismic intensity of 8 degrees.

Installation Conditions: No flammable, explosive, or corrosive gases; no excessive vibration or water vapor.

Maintenance and Safety

The VHK-12 Isolation Mechanism requires minimal maintenance, thanks to its simple design and durable construction. Regular inspections should be carried out to ensure the mechanism is functioning correctly, but overall, it is designed for low-maintenance operation. The system’s safety interlocks and remote monitoring capabilities help prevent accidents and ensure that proper isolation procedures are always followed.