HXGN-12 (European style) box-type fixed metal-enclosed switchgear
Structural characteristics
1.It adopts a fully assembled structure, which is light and beautiful, can be installed in any combination, and is convenient for unlimited expansion and extension.
2.It can be equipped with FN12-10 compressed air load switch and combination electrical appliances, or FZN25-12 vacuum load switch and combination electrical appliances, and the installation dimensions are completely consistent. It is small in size, maintenance-free, has a three-phase linkage structure, and has a clear isolation break.
3.Equipped with FN12-10 load switch and combination electrical appliance, the installation method is flexible and can be installed on the left or right side, upright or inverted.
4.It can be operated manually or electrically, and has remote control function.
5.It is equipped with complete and reliable mechanical linkage and interlocking devices to fully achieve the "five protection" functions.
6.Use linkage protective insulating valve to shield live contacts and ensure personal safety.
7.Adopt front operation and maintenance, and can be installed against the wall.
8.The front door is equipped with an observation window, which allows you to clearly observe the working conditions of the components in the cabinet.
9.Comply with GB3906 standard.
Main technical parameters
|
Project |
Unit |
FN12-10 |
FZN25-12 |
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Rated voltage |
kV |
12 |
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1min power frequency withstand voltage |
To ground and between phases 42; |
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Lightning impulse voltage (peak value) |
To ground and between phases 75; |
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Rated frequency |
Hz |
50 |
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Main bus rated current |
A |
630 |
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Load |
Rated current |
630 |
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Rated current life |
Second-rate |
Not less than 100 |
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Breaking capacity of no-load transformer |
kVA |
1250 |
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Rated thermal stability current |
kA/s |
20/4; Earthing switch 20/2 |
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Rated dynamic stability current (peak value) |
k |
50 |
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Rated short-circuit making current (peak value) |
50 |
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Combined |
Fuse rated current |
A |
100 |
|
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Rated transfer current |
1500 |
2000 |
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Rated short-circuit breaking current |
kA |
31.5 |
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Matching fuse model |
|
S□LAJ-12(XRNT□-10) |
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Mechanical life |
Second-rate |
2000 |
1000 |
|
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Auxiliary circuit 1min power frequency withstand voltage |
kV |
2 |
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Working voltage of electric actuator |
V |
AC/DC 220;110 |
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Protection level |
|
IP2X |
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Overall dimensions (W x D x H) |
mm |
650(850)x900x2000(2200) |
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Installation and debugging
1.When installing, first place the ring main unit on the installation foundation, arrange it neatly, debug it, and then fasten it with fasteners.
2.When installing the main busbar, open the busbar chamber for installation. The contact surface of the busbar should be flat and free of dirt.
3.The ring network cabinet should be grounded reliably and the grounding loop should be checked.
4.During debugging, perform debugging according to the ring network operating instructions and the instructions of each component in the cabinet.
5.After installation and commissioning, operate the switch components and anti-misoperation mechanisms 5 times. If no abnormality is found, the switch mechanism is considered to be operating normally.
Usage and troubleshooting
1.Check before power supply
Before supplying power to the ring main unit, the electrical performance, insulation level and wiring correctness of all components in the unit should be fully checked. Only when everything is normal can it be put into operation.
2.Normal operation status
During normal operation, whether it is the incoming or outgoing cabinet, the load switch should be in the closed position, the grounding knife should be in the open position, and the cabinet should be in the closed interlock state.
3.Troubleshooting
3.1. When repairing a fault in the incoming cabinet, first cut off the incoming power supply, open the load switch, and check the power display on the cabinet. After confirming that everything is correct, close the grounding knife and open the door for maintenance.
3.2. When repairing a fault in the outgoing line cabinet, the load switch in the cabinet should be disconnected first, the grounding knife should be closed, and the front door should be opened for maintenance. At this time, the main busbar is energized.
Maintenance and repair
1.The ring main unit needs maintenance and repair in the following cases:
2.Check the insulation level of the product after 5 years of operation:
3.After the load switch has been opened and closed for 100 times, the main circuit resistance, the moving and static contacts and auxiliary contacts of the load switch should be checked.
4.Under normal circumstances, the ring main unit should be maintained and repaired after a power outage.