HXGN -12(SF6) type unit AC metal closed loop network switchgear (Ring Main Units) is a high-voltage electrical product designed and developed by ourselves.
All technical performance indexes meet IEC298 and GB3906 standards. It is suitable to exchange 50Hz,12KV,serving as device of receiving and distribution of electrical energy.
The circuit breaker or the VD4-S vacuum circuit breaker divides 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 misoperation 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:-25ºC -+40ºC;
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.
The main technical parameters
| Item |
Unit |
Parameters |
| Rated voltage |
kV |
12 |
| Rated frequency |
Hz |
50 |
| Max rated current of main busbar and fuse |
A |
630/125 |
| Max rated current of main busbar and fuse Rated shirt time withstand current of main |
kA/s |
20/3 |
| Main loop,earthed loop maximun endurable rated current Rated withstand current of main loop and |
kA |
50 |
| Main loop, earthed loop short circuit on-and off rated current Rated short-circuit on-off current of main time withstand current of main |
kA |
50 |
| The opening times of the load switch with full capacity |
|
100 |
| The fused breaker opening the current Breaking current of fuse |
kA |
31.5 40 |
| Rated closed loop breaking current |
A |
630 |
| Rated shift current |
A |
1600 |
| Mechanical life |
|
2000 |
| 1 min line frequency resistance (peak value) recurrence, to the earth/isolation fracture |
kV |
42/48 |
| Lighting impulse withstand voltage (peak value) recurrence, to the earth/isolation fracture |
kV |
75/85 |
| Secondary loop 1min power frequently withstand voltage |
kV |
2 |
| Protection level |
IР3X |
Structural features and working principle
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. v.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 components 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 operation can be realized.Inside the cabinet the components such as CT/PT and ZNO arr ester 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 of the 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
(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. 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.
Operation and troubleshooting
1. Operation
Please operate strictly according to the following steps, otherwise
(1) Operating sequence of load switch
a. Switch-on: When the load switch stays on, plug the operating
clockwise (about 180° ) to make it stay on.
b. Switch-off: When the load switch stays on, manually operate the switch stay off. For the load switch with fuse striker, after the fuse is
some damage may be caused.
handle into the operating hole of the load switch and turn it
tripping button or the tripping electromagnet to make the load 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 it anticlockwise (about 90° ) to turn
off the grounding switch.
d. Operate the load switch and turn it on to transmit the power.
2. Trouble shooting
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.
Maintenance and repair
1. After the cabinet is open, check all of the insulation pieces and disassemble the damp ones, put them into 70-80 ºC 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
Storage
Ring network cabinet should be stored in the dry and ventilated warehouse with temperature of-30ºC -+40ºC .
Accessories
Certificate of quality
Installation and operation instruction
Packing list
Appending accessories list
Secondary connection diagram
Q1. Can I get samples?
Yes. If you have any needs, please contact us and we will respond within 24 hours.
Q2. Can I use other logos or designs on the products?
Yes, we provide OEM/ODM services, you can customize products with other logos and designs.
Q3. Do you have factories?
Yes, we have factories in Jiangsu and Zhejiang, welcome to visit our company.
Q4. How do you ensure quality?
We have a complete quality management system, use qualified raw materials, conduct quality inspections in different production links, regularly collect user feedback, and trace the source in time when quality problems occur, and keep records to prevent repeated errors.
Q5. How long does it take to prepare after placing an order?
Usually it takes 5~7 days, it also depends on the quantity of the order.
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