Product Overview
The FZN25A-12D/T630-20 indoor AC high-voltage vacuum electrical load switch is a three-phase, 50 Hz, 12 kV indoor device used in power distribution stations and substations of industrial and mining enterprises. This electrical load switch provides protection and control for electrical facilities, handling switching of load current, loop current, no-load transformers, and cable charging current. It also features an earthing switch capable of closing short-circuit current, ensuring safe operation even under load on switch conditions.
The FZRN25A-12D/T200-31.5 indoor AC high-voltage vacuum power load switch and fuse combination apparatus offers similar functions, including short-circuit protection and reliable load control. With manual or motorized operation, this electrical load switch supports remote signaling, remote measurement, and remote control, making it ideal for modern power system requirements.
Model Meaning
Main Technical Parameters
|
No. |
Item |
Unit |
Parameter |
||
|
FZN25A-12D/T630-20 |
FZRN25A-12D/T200-31.5 |
||||
|
1 |
Rated Voltage |
kV |
12 |
||
|
2 |
Rated Current |
A |
630 |
200 |
|
|
3 |
Rated Frequency |
HZ |
50 |
||
|
4 |
Rated Insulation Level |
1-minute Power Frequency Withstand Voltage |
kV |
Arc Extinguishing Chamber Break: 30;Ground and Phase-to-Phase: 42;Isolation Break: 48 |
|
|
Lightning Impulse Withstand Voltage (Peak) |
kV |
Ground and Phase-to-Phase: 75;Isolation Break: 85 |
|||
|
5 |
Rated Short-time Withstand Current |
kA |
20 |
||
|
6 |
Rated Short-circuit Duration |
S |
4 |
||
|
7 |
Rated Peak Withstand Current |
kA |
50 |
||
|
8 |
Rated Active Load Breaking Current |
A |
630 |
||
|
6 |
Rated Loop-breaking Current |
A |
630 |
||
|
10 |
Rated Cable Charging Breaking Current |
A |
10 |
||
|
11 |
Rated No-load Transformer Breaking Capacity |
kVA |
1600 |
||
|
12 |
Rated Short-circuit Breaking Current |
kA |
- |
31.5 |
|
|
13 |
Rated Transfer Current |
A |
2000 |
||
|
14 |
Fuse Model |
SDLAJ-12, XPNT1-12 |
|||
|
15 |
Actuator Output Energy |
J |
1+0.5 |
||
|
16 |
Rated Short-circuit Making Current |
kA |
80(Prospective Peak) |
||
|
17 |
Earthing Switch Rated Short-time Withstand Current |
kA |
20 |
||
|
18 |
Earthing Switch Rated Short-circuit Duration |
S |
2 |
||
|
19 |
Earthing Switch Rated Peak Withstand Current |
kA |
50 |
||
|
20 |
Auxiliary Circuit Rated Voltage |
V |
220V,110 |
||
|
21 |
Mechanical Life |
times |
10000 |
||
Working Condition
- Ambient Air Temperature: Upper limit +40°C; Lower limit -25°C (storage and transportation allowed at -30°C).
- Altitude: 1000m.
- Relative Humidity: Daily average not exceeding 95%; Monthly average not exceeding 90%.
- Seismic Intensity: Not exceeding 8 degrees.
- The surrounding air should not be significantly polluted by corrosive or flammable gases, water vapor, etc.
- Locations without frequent severe vibration.
- Pollution Level: Class II.
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