HXGN 口-12(SF6)unit type AC metal enclosed ring main unit switchgear

Overview

HXGN 口- 12(SF6)Unit type AC metal enclosed ring main unit (hereinafter refer to as ring network cabinet)is a new generation of high-voltage electric appliance product designed and developed independently by our company according to the requirement of the domestic agricultural electricity and the city net transformation after introduction of overseas advanced technology. Each technical performance index completely reaches the IEC298 and GB3906 standard.

The main switch, operation mechanism and components of ring main unit is made of the ABB Corporation original parts or the SFL-12/24 switch equipment imported overseas and assembled at home. We can also install the ABB Corporation original parts of HAD/US type SF according to the request of users. The operation of circuit breaker or VD 4-S vacuum circuit breaker is divided into two modes:manual and electrical operation.

The cabinet body is riveted after processed by CNC machine tool with reliable mechanical interlocking and misoperating prevention function. The protection level reaches IP3X. This product has the remarkable characteristics such as the small volume, light weight, attractive appearance, simple operation, long life, high parameter with no pollution and maintenance- free.

Environmental conditions

a Surrounding air is free from corrosive gas or flammable gas, steam and other obvious pollution;
b Relative temperature:the daily average value ≤95%, the monthly average value≤90%;
C The altitude should not exceed 2000m;
d Without frequent vibration;
e Surrounding air temperature:-25℃~+40℃ .

Application

HXGN □-12 (SF6)unit type AC metal ring-network switchgear is suitable for AC 50Hz, 12Kv, serving as device of receiving and distribution of electrical energy.

Structutal features and working principle

This ring network type cabinet makes air as the insulating medium and it is mainly assembled with ZFN □-10/630 type vacuum load switch. And there are two cabinet schemes-incoming cabinet and outgoing cabinet.

1. Incoming cabinet scheme
There is a ZFN □-10/630 type vacuum load switch on the main circuit inside the cabinet with isolating knife, and grounding knife. They are all installed in one machine stand and they are interlocked, realizing the connection of three working stations of busbar, isolation and grounding. Inside the cabinet, components such as CT, PT can be installed flexibly.

2. Outgoing cabinet scheme
There is a ZFN □-10/630 type vacuum load switch, fuse with striker (used as isolating switch)and grounding knife on the main circuit inside cabinet, and the three working stations operation can be realized. Inside the cabinet the componments such as CT/PT and ZNO arrester can be installed flexibly, so the metering cabinet can be removed. Inside the incoming cabinet and outgoing cabinet, there is insulating protecting baffle interlocked with grounding switch. And inside the cabinets, the mechanical interlocks are adopted between each switch and baffle as well as the cabinet door with the requirement of “five-prevention”and IP2X of the protection degree of the cabinet enclosure.

Maintenance and repair

1 After the cabinet is opened, check all of the insulation parts and disassemble the damp ones, put them into 70-80℃ drying box, and take out for debugging again after 48 hours drying.

2 Ifthe product is damp or rusty during the storage, please clean it at once and protect it well.

3 Maintenance and inspection should be done regularly to ring network cabinet during operation.
(1)Vacuum degree of vacuum arc-extinguishing room;
(2)Contact abrasion degree;
(3)Whether the fastening pieces are loose or not;
(4)Mechanical electric parameter such as opening range, overrun;
(5)Whether the running is flexible or not;
(6)Whether the interlock is reliable or not;
(7)Whether all of the parts are clean, especially the insulation fittings.

4 Conduct overall examination and debugging to ring network cabinet in following conditions:
(1)Routine examination and cleaning once a year;
(2)After every 2000 times operation of load switch.

Storage

Ring network cabinet should be stored in the dry and ventilated warehouse with temperature of-30℃~+40℃ .