Outline

HXGN□-12(SF6) Unit type AC metal-enclosed ring main unit(hereafter refer to as ring net cabinet) is a new generation of high-pressure electric appliance product designed and developed independently by our own 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 loop-net cabinet s main switch, the operating mechanism and the components is made of the  Corporation original piece or the SFL-12/24 switch equipment imported overseas and ass-embled at home. We can also install the Corporation original piece of HAD/US type SF according to the request of users. The circuit breaker or the VD4-Svacuum circuit-breaker divide into two kinds: be operated manually and electrically according to the operating mode. 

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

Use environmental conditions

1.The altitude should not exceed 2000m.

2.Surrounding air temperature: -25℃ ~+40℃

3.Relative temperature: the daily average value is not higher than 95%, the the monthly average value is nothigher than 90%

4.Surrounding air without caustic gas or ignitable gas, steam and other obvious pollution

5.Without fierce vibration

Model and meaning

Use

HXGN□-12 (SF6) unit type exchange metal ring- net switching equipment, is suitable to exchange 50Hz、12kV , searving as device of receiving and distribution of electrical energy.

The main technical parameters

Structural features and working principle

The outline structure of the product is referred to as diagram 1 and diagram 2; the installation dimension is referred to as diagram3. This ring network type cabinet makes air as the insulating medium,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 conditionally. The three of them are all installed in one machine stand and there are interlocks among them, so that it is realized to connect the operation of three working stations of bus, isolation and grounding. Inside the cabinet the com-ponents such as CT, PY are available.

2.Outgoing cabinet scheme

ZFN □ -10/630 type vacuum load switch, fuse with striker (used as isolating switch) and grounding knife on the main circuit inside the cabinet, and the three working stations oper-ation can be realized. Inside the cabinet the components such as CT/PT and ZNO arrester are available, so the metering cabinet can be omitted. Inside the incoming cabinet and out-going 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.

Lifting, installation, commissioning and replacement of fuses

1.Handling 

Before handling, undertake check before opening the cabinet according to the regulations. When thecabinet is handling delivered, it's a must to operate according to the operation marking demands.Handle with care and without shake.

2.Installing 

After opening the cabinet, check whether the cabinet body and the components inside are good,whether they work normally, and whether they are moistened. Only after definite confirmation can the installation be undertaken. 

3.Debugging

It's necessary to have a debugging according to the following steps if the components inside thecabinet don't meet the technical requirements or the interlocks don't locate well: (1) For the load switch, grounding switch or isolating switch, you can make them meet the technical demands by adjusting the drag rod length, changing the angle and position of drag rod and operating rod. (2) If there is any interlock that doesn't locate well, you can make it locate by fine adjusting relevant operating rod length to change the position of interlock hole.

4.Fuse replacing 

It must operate strictly according to the sequence of power off. First, turn off the load switch, turn on the fuse to the isolating position and then turn on the grounding switch. Only after plugging the insulating protecting baffle can the cabinet door be opened and can the fuse be replaced.

Use and troubleshooting

1.Operation 

Please operate strictly according to the following steps, otherwise some damage may be caused. 

(1) Operating sequence of load switch 

a.Switch-on: When the load switch stays on, plug the operating handle into the operating hole of the load switch and turn it clockwise (about  180° ) to make it stay on. 

b.Switch-off: When the load switch stays on, manually operate the tripping button or the tripping electromagnet to make the load switch stay off. For the load switch with fuse striker, after the fuse is fused, the striker can make the load switch stay off. 

(2) Operating sequence of power off 

a.Turn off the load switch to unlock the interlock between the isolating and grounding switches. 

b.Plug the operating handle into the operating hole of the isolating and grounding switches and turn it clockwise (about 90° ) to open the isolating knife. 

c.Turn again clockwise (about 90° ) to turn off the grounding switch rapidly. 

d.Plug the insulating baffle to unlock the door interlock. 

e.Open the door and maintain.

(3) Operating sequence of power transmission 

a.Close the cabinet door. 

b.Extract the insulating baffle and lock the cabinet door. 

c.Plug the operating handle into the operating hole of the isolating and grounding switches and turn itanticlockwise (about 90° ) to turn off the grounding switch. 

d.Operate the load switch and turn it on to transmit the power. 

2.Fault treatment 

During the operation of the ring network type cabinet, if there is any fault, such as loose fasteners, bad lubrication of mechanical parts and reduced vacuum degree in the vacuum interrupter, etc. After the power off, check and remove the faults by fastening, adding lubricant and adding withstand voltage, etc.

Repair and repair

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

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

3.Maintenance and repair should be done to ring network cabinet during operation

(1).Vacuum extent of vacuum arc-extinguishing room 

(2).Contact abrasion degree 

(3).Whether the fastening pieces are loose or not; 

(4).Mechanical electric parameter such as open travel, over travel. 

(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 for insulation fittings. 

4.Do overall examination and debugging to ring network cabinet in following conditions:

(1).Routine examination and cleaning for every

(2).After every 2000 times operation of load switch

Store

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

Random document 

1.Certificate of quality 

2.Installation and operation instruction 

3.Packing list 

4.Appending accessories list 

5.Secondary connection diagram

Ring cabinet installation 

Combination electrical cabinet 

Load switch cabinet