Overview
HXGN □ -12(SF6) type unit AC metal closed-loop network switchgear (hereinafter referred to as ring network cabinet) is a high-voltage electrical product designed and developed by ourselves after introducing foreign leading technology and according to the requirements of domestic rural power and urban network transformation. All technical performance indexes meet IEC298 and GB3906 standards.
The loop-net cabinet smain switch,the operating mechanism and the components is made ofthe ABB Corporation original piece or the SEL-12/24 switch equipment imported overseas and assembled at home We can also install the ABB Corporation original piece of HAD/US type SF according to the request of uers. The circuit breaker or the VD4-S vacuum circuit-breakr 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
◇ The altitude should not exceed 2000m；
◇ Surrounding air temperature:-25℃ -+40℃；
◇ Relative temperature: the daily average value ≤ 95%, the monthly average value ≤ 90%；
◇ Surrounding air without caustic gas or ignitable gas, steam and other obvious pollution；
◇ Without fierce vibration。
Use
HXGN □ -12 (SF6) unit type exchange metal ring-net switching equipment, is suitable to exchange 50Hz、12KV，searving as device of receivingand distribution of elecrical energy.
Model and meaning
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
Therc is a ZFN □ -10/630 type vacum load switch on the main circuit inside the cabinet with isolaing knife，and grounding knife conditionally.
v.The three of them are all installed in one machine stand and there are interlocks among them，so that it is realized to connet the operation of three working stations of bus，isolation and grounding.Inside the cabinet the components such as CT，PY are available.
2.Outgoing cabinet scheme
ZFN □ -10/630 type vacum load switch，fuse with striker（used as isolating switch）and grounding knife on the main circuit inside the cabinet，and the three working stations operation 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 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 ofthe protection degree of the cabinet enclosure.
Lifting，installation，commissioning and replacement of fuses
1. Lifting
Before handling, undertake check before opening the cabinet according to the regulations. When the cabinet is handling delivered, it's a must to operate according to the operation marking demands. Handle with care and without shake
2. Installation
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. Commissioning
It' s necessary to have acommissioning according to the following steps if the components inside the cabinet 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 finc adjusting relevant operating rod length to change the position of interlock hole.
4. Replacement of fuses
It must operate strictly according to the sequence of power of. 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.
Operfion 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.
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 it anticlockwise (about 90° ) to turn off the grounding switch.
d. Operate the load switch and turn it on to transmit the power.
2. Lroubleshoofing
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.
Nain tenance and repair
1. After the cabinet is open, check all of the insulation pieces and disassemble the 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 infollowing conditions:
(1). Routine examination and cleaning for every
(2). After every 2000 times operation ofload switch
Storage
Ring network cabinet should be stored in the dry and ventilated warehouse with temperature of-30℃ -+40℃ .
Shippment
◇ Certificate of quality
◇ Installation and operation instruction
◇ Packing list
◇ Appending accessories list
◇ Secondary connection diagram
