

Box Type Fixed Ring Main Unit Switchgear

Name: Box Type Fixed Ring Main Unit Switchgear
Brand: Zhejiang Tenrony Electricity Co., Ltd.
Availability: InStock

Box-type fixed indoor AC metal-enclosed switchgear (hereinafter referred to as "switchgear") is designed for use in ring or radial power supply systems with a rated voltage of 12 kV and a rated current not exceeding 630 A. This high voltage switchgear for sale is especially suitable for installation in prefabricated substations, serving as a control and protective device for power systems.

Products

Features

Diverse core configurations: Equipped with insulating enclosures and SF6 load switches, or load switch and fuse combination devices.

Outstanding practical performance:

1. Compact size and light weight;

2. Simple operation with low operating force;

3. Reliable interlocking and strong safety;

4. Maintenance-free, reducing subsequent operating costs.

Clear application scenarios: Ring main unit switchgear is a new generation of high-voltage switchgear required for urban power grid renovation and construction.

Compliance with multiple standards: Meets domestic and international standards such as GB3906, GB/T11022, IEC60298, and DL/T404, with quality based on standardized norms.

Parameters

Main Technical Parameters
Name	Unit	Value
Rated Voltage	kV	12
Rated Frequency	Hz	50
Main Bus Rated Current/Fuse Maximum Rated Current	A	630/125
Main and Ground Loop Rated Short-time Withstand Current	kA/S	20/3
Main and Ground Loop Rated Peak Withstand Current	kA	50
Main and Ground Loop Rated Short-circuit Making Current	kA	50
Load Switch Full Capacity Breaking Times	Times	100
Fuse Breaking Current	kA	31.5、40
Rated Closed Loop Breaking Current	A	630
Rated Transfer Current	A	1600
Mechanical Life	Times	2000
1min Power Frequency Withstand Voltage(peak)Relative to Ground/Isolation Clearance	kV	42/48
Lightning Impulse Withstand Voltage(peak)Interphase, to Ground/isolation Clearance	kV	75/85
Secondary Circuit 1min Power Frequency Withstand Voltage	kV	2
Protection Level		IP3X

Structural Features
	△Cabinet Structure
	The ring main unit cabinet is made of 2mm thick aluminum-zinc plate(or cold- rolled plate after powder coating, riveted and formed. There are two pressure release holes at the back of the cabinet, one for the cable compartment and the other for the load switch/main busbar compartment. This structure ensures maximum protection for personal safety and reliable operation of the equipment.
	△Various Compartmentalized Small Rooms
	1. Busbar Compartment: The busbar compartment is located at the top of the cabinet and connects adjacent switchgears.
	2. The load switch is an independent unit, filled with SF6gas internally.
	3. Cable Compartment: Approximately 75%of the space is used for cable
	connections, fuses, grounding switches, and the installation of CTs and PTs. 4. Mechanism Room and Interlocking
	The small room contains operating mechanisms and interlocks, as well as position indicators, auxiliary contacts, trip coils, live displays, and interlocks. 5. Relay Box
	The relay box is located at the top of the cabinet and is optional. The small room is used to install special devices such as instruments, relays, and motor units. 6. Circuit Breaker Room: A circuit breaker (SF6 or vacuum)can be placed below the load switch.
	△Pressure release
	1. The upper pressure release
	It is used to release the gas pressure generated in the busbar and load switch room during internal arc faults. 2. The pressure relief below
	It is used to release the gas pressure generated in the cable compartment during internal arc faults.
	Circuit breaker cabinet width	mm	750
	Other cabinet width	mm	375/500
	Height	mm	1600/1850
	Depth	mm	980/900
	Relay box height	mm	450

Benefits

Operating Environment Conditions

Ambient Air Temperature:-15℃~+40°℃
Altitude:1000m and below(High altitude type can also be provided);
Temperature and Humidity Conditions: Daily average relative humidity≤95%,
Daily average water vapor pressure does not exceed 2.2kPa;
Monthly average relative humidity≤90%,
The monthly average water vapor pressure does not exceed 1.8kPa.
Seismic intensity: not exceeding8°
No corrosive or flammable gases or obvious pollutants.
Note: When the above normal operating conditions are exceeded, the user can negotiate with the company for a solution.

Use

Box-type fixed indoor AC metal-enclosed switchgear is suitable for ring network power supply or radial power supply systems with a rated voltage of 12 kV and a rated current not exceeding 630 A. ring main unit switchgear is particularly suitable for use in prefabricated substations as a control and protection device for the power system. Ring main unit switchgear is a new generation of high-voltage switchgear required for urban power grid renovation and construction.

Get a Quote Today:
Power Up Your Project
With Tenrony