TXGNH-12 Box-type fixed metal-enclosed switching device high voltage switching device
Outline
TXGNH-12 type fixed metal – enclosed switching device (abbreviated as ring main unit) is an AC high voltage electrical equipment with rated voltage of 12 KV and rated frequency of 50Hz. It is mainly used in three – phase AC loop network, terminal distribution network and industrial electric equipment. To accept and distribute electric energy and other functions, it is also suitable for equipment into the box type substation.
Model and meaning
Regular service conditions
1 Ambient air temperature: 1: -15 ℃ ~ 40 ℃;
2 Altitude: 1000m and below;
3 Humidity condition: the daily average value is not more than 95%, the daily average of water vapor pressure is not more than 2.2 KPA, the monthly average value is not more than 90%, and the monthly average of water vapor pressure is not more than 1.8 KPA.
4 Earthquake intensity: no more than 8 degrees;
5 A place free of apparent pollution, such as corrosive or combustible gases.
Note: users may negotiate with our company if the above normal use conditions are exceeded.
Main technical parameters
Serial No. |
|
Project |
Unit |
TFN12-10 |
TFZN25-12 |
1 |
|
Rated voltage |
KV |
12 |
|
2 |
|
1min power frequency withstand voltage |
Ground and interphase 42; isolated fracture 48 |
||
3 |
|
Lightning impulse voltage (peak) |
To the ground and phase 75;Isolation fracture 85 |
||
4 |
|
Rated frequency |
Hz |
50 |
|
5 |
|
Main busbar rated current |
A |
630 |
|
6 |
Load switch |
Rated current |
630 |
||
7 |
Electrical life under rated current |
times |
No less than 100
|
||
8 |
interruption no-load transformer capacity |
kVA |
1250 |
||
9 |
Rated thermal stable current |
kA/S |
20 / 4 earthing switch 20 / 2 |
||
10 |
Rated dynamic stable current (peak) |
kA |
50 |
||
11 |
Rated short-circuit closing current (peak) |
50 |
|||
12 |
Composite apparatus |
Fuse rated current |
A |
100 |
|
13 |
Rated transfer current |
1500 |
2000 |
||
14 |
Rated short-circuit breaking current |
kA |
31.5 |
||
15 |
Fuses type |
|
S口LAJ-12(XRNT□-10) |
||
16 |
|
Mechanical life |
Times |
2000 |
10000 |
17 |
|
Auxiliary Port 1min Power Frequency withstand Voltage |
kV |
2 |
|
18 |
|
Electric operating mechanism working voltage |
V |
Sub DC 220; 110 |
|
19 |
|
Electric operating mechanism working voltage |
|
IP2X |
|
20 |
|
Shape size (wide × depth × high) |
mm |
650 (850) ×900×2000 (2200) |