TDXG-12(L) Indoor AC high voltage SF6 ring main unit
Product characteristics
Small in size
Convenient installation
Performance stability
Maintenance – free
TDXG-12(L)
Indoor AC high voltage SF6 ring main unit
Scope of application
Ring main units are suitable for three-phase AC 50 Hz, rated voltage 12kV indoor distribution device. And It is widely used in industrial and civil cable ring network and power supply terminal.
It is especially suitable for receiving and distributing electric energy in small secondary distribution stations, open and close stations, industrial and mining enterprises, urban residential areas, airports, railways, tunnels, high-rise buildings and other power systems.
Technical data
|
Name |
Unit |
Parameter |
|
|
Rated voltage |
KV |
12 |
|
|
Main busbar rated current |
A |
630 |
|
|
Rated current |
A |
630 |
|
|
Rated frequency |
Hz |
50 |
|
|
Rated short-time withstand current |
KA |
20 |
|
|
Rated short circuit duration |
S |
4 |
|
|
Rated peak tolerant current |
KA |
50 |
|
|
Rated short-circuit closing current |
KA |
50 |
|
|
Rated active load breaking current |
A |
630 |
|
|
Rated closed-loop breaking current |
A |
630 |
|
|
Rated cable charging breaking current |
A |
10 |
|
|
Earthing switch rated short-time withstand current |
KA |
20 |
|
|
Earthing switch rated short duration |
S |
4 |
|
|
Earthing switch rated peak withstand current |
KA |
50 |
|
|
Rated insulation level |
1min power frequency withstand voltage (effective value) |
KV |
(phase, over the ground) 42; (fracture) 49 |
|
Lightning impulse withstand voltage (peak) |
KV |
(phase, over the ground) 75; (fracture) 85 |
|
|
Main circuit resistance |
μΩ |
≤400 |
|
|
Mechanical life
|
load switch |
times |
5000 |
|
Earthing switch |
times |
2000 |
|
|
Auxiliary circuit 1min power frequency withstand voltage |
KV |
2 |
|
|
SF6 gas rated pressure (20 ℃ gauge pressure) |
Mpa |
0.040±0.005 |
|
|
Annual leakage rate of SF6 gas |
|
≤1% |
|
|
levels of protection |
|
IP3X |
|
