DR-XGN-24 KV Ring Main Unit
Model meaning
Normal service condition
◆Altitude ≤1000m
◆Maximum ambient temperature +40℃
◆Minimum ambient temperature -35℃
◆Maximum daily temperature difference 25K
◆Daily average relative humidity ≤95%
◆Monthly average relative humidity ≤90%
◆Earthquake resistance level 8
◆System rated frequency 50Hz
◆SF6leakage rate ≤0.1%
◆Enclosure protection class IP3X
Main feature
◆Increase the main transformer capacity and improve the power supply capacity of the substation.
◆Improve the power transmission capacity of distribution lines and reduce the number of distribution lines.
◆Increase the power supply radius of the medium voltage line.
This voltage level earlier in a small area trial operation,by the requirements of the State grid company,by Jiangsu provincial pilot promotion of 20kV voltage level,now the southern network is also ready to start promoting 20kV voltage level in Guangdong and other places,it can be predicted that the final 24kV equipment will dominate the market.
Main technical parameters
|
Item |
Unit |
20kV SF₆ Ring switchgear |
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|
Rated voltage |
kV |
24 |
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|
Rated frequency |
Hz |
50 |
||
|
Rated current |
A |
630A≤100(Load switch-fuse combination cabinet) |
||
|
Rated short-circuit breaking current |
kA |
31.5 |
||
|
Rated closing current(peak) |
kA |
50 |
||
|
Rated heat stable current |
kA/3S |
20 |
||
|
Rated dynamic stable current(peak) |
kA |
50 |
||
|
Insulation level |
Power frequency withstand voltage |
Phase to phase and ground to ground |
kV/1min |
65 |
|
Fracture |
kV/1min |
79 |
||
|
Lightning impulse withstand voltage |
Phase to phase and ground to ground |
kV |
125 |
|
|
Fracture |
kV |
145 |
||
|
Rated active load breaking current |
A |
630 |
||
|
Rated cable charging breaking current |
A |
25 |
||
|
Main loop resistance |
μΩ |
≤300 |
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|
Kinetic function |
|
Spring type:DC/AC 220V/48V |
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|
Rated transfer current |
A |
1400 |
||
|
Mechanica life |
|
Load switch:3000；Ground switch:2000 |
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Primary scheme
|
Primary plan number |
DC01 |
Primary plan number |
DC08 |
|
Main bus TMY-3(40×8) |
|
Main bus TMY-3(40×8) |
|
|
DR-XGN□-24 Primary system diagram |
DR-XGN□-24 Primary system diagram |
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|
Disposition |
Incoming cabinet |
Disposition |
Outlet cabinet |
|
Load switch FLN□-24D |
1 |
Load switch FLN□-24D |
|
|
Load switch FLRN□-24D |
|
Load switch FLRN□-24D |
1 |
|
Live display DXN-T/Q |
1 |
Live display DXN-T/Q |
1 |
|
The current transformer |
|
The current transformer |
|
|
Fuse XRNP-24/□A |
|
Fuse XRNP-24/□A |
|
|
Voltage transformer JDZ-24 |
|
Voltage transformer JDZ-24 |
3 |
|
Lightning arrester HY5WS-33/85 |
3 |
Lightning arrester HY5WS-33/85 |
|
|
Fuse XRNT-24/□A |
|
Fuse XRNT-24/□A |
3 |
|
Measuring instrument |
|
Measuring instrument |
|
|
Protection mode |
|
Protection mode |
|
|
Auxiliary function |
|
Auxiliary function |
|
|
Mode of operation |
Manual operation |
Mode of operation |
Manual operation |
|
Cabinet width x Depth x height(mm) |
650×1200×2000 |
Cabinet width x Depth x height(mm) |
650×1200×2000 |
|
Primary plan number |
DC01 |
Primary plan number |
DC08 |
|
Main bus TMY-3(40×8) |
|
Main bus TMY-3(40×8) |
|
|
DR-XGN□-24 Primary system diagram |
DR-XGN□-24 Primary system diagram |
||
|
Disposition |
Incoming cabinet |
Disposition |
Outlet cabinet |
|
Load switch FLN□-24D |
1 |
Load switch FLN□-24D |
|
|
Load switch FLRN□-24D |
|
Load switch FLRN□-24D |
1 |
|
Live display DXN-T/Q |
1 |
Live display DXN-T/Q |
1 |
|
The current transformer |
|
The current transformer |
|
|
Fuse XRNP-24/□A |
|
Fuse XRNP-24/□A |
|
|
Voltage transformer JDZ-24 |
|
Voltage transformer JDZ-24 |
3 |
|
Lightning arrester HY5WS-33/85 |
3 |
Lightning arrester HY5WS-33/85 |
|
|
Fuse XRNT-24/□A |
|
Fuse XRNT-24/□A |
3 |
|
Measuring instrument |
|
Measuring instrument |
|
|
Protection mode |
|
Protection mode |
|
|
Auxiliary function |
|
Auxiliary function |
|
|
Mode of operation |
Manual operation |
Mode of operation |
Manual operation |
|
Cabinet width x Depth x height(mm) |
650×1200×2000 |
Cabinet width x Depth x height(mm) |
650×1200×2000 |
Overall dimension
