High Voltage Switchgear
01
HXGN-12 Fixed-Type Metal-Clad Ring Main Switchgear (RMU)
Features
● SF6 Ring Main Unit (RMU): Easy to combine and expand, compact, safe, and reliable.
● SF6 Insulation & Arc Quenching: Using SF6 gas as insulation and arc-quenching medium, the constant magnetic field rotating arc quenching method ensures arc-extinguishing capability is independent of arc current, featuring excellent breaking performance, low overvoltage, long electrical life, and maintenance-free arc chamber.
● Three-position Functionality: Equipped with a miniaturized pressure gauge for multi-functional operation.
● Simple Operation: Reliable operating mechanism and interlocking system for easy operation.
● Zero Gauge Pressure Certification: Passed rated breaking tests at zero SF6 gauge pressure, ensuring high functional margin and reliability.
● Ground Switch Capability: Ground switch meets national standards for short-circuit making and breaking capacity.
● Cabinet Structure: Made of imported aluminum-zinc coated steel plates, stamped and assembled for high rigidity and deformation resistance.
Product structure
● Overall structure
The ring main unit is composed of busbar room, load switch (or circuit breaker room), cable room, operating machinery, interlocking mechanism and low-voltage control room, as well as measurement or metering circuits. Each compartment is divided by steel plates to avoid faults affecting adjacent rooms.
● Busbar room
The busbar room is arranged at the top of the cabinet, where the main busbars are connected together and run through the entire row of switchgear. The busbar is horizontally arranged for easy expansion.
Operating conditions
● Altitude: ≤1000m
● Ambient temperature: -35°C to +45°C, maximum daily average temperature difference ≤25°C
● Relative humidity: Daily average ≤95%, monthly average ≤90%
● Seismic resistance: Seismic intensity 8
● Environmental requirements: Free from severe vibration, shock, fire hazards, chemical corrosion, or explosive risks.
Note: For orders exceeding the above conditions, please consult our company for customization.
Technical specifications
|
No. |
Items |
Unit |
FN12-12 |
FZN25-12 |
|
|
1 |
Rated voltage |
12 |
|||
|
2 |
1min Power frequency withstand voltage |
kV |
Phase-to-ground & phase-to-phase: 42kV; Isolating break: 48kV |
||
|
3 |
Lightning impulse voltage(Peak) |
Phase-to-ground & phase-to-phase: 75kV (peak); Isolating break: 85kV (peak) |
|||
|
4 |
Rated frequency |
Hz |
50 |
||
|
5 |
Load switch |
Rated current |
A |
630 |
|
|
6 |
Breaking capacity of no-load transformer |
kVA |
1250 |
||
|
7 |
Rated thermal stable current |
kA/S |
20/4;Earthing switch20/2 |
||
|
8 |
Rated dynamic stable current(Peak) |
k |
50 |
||
|
9 |
Rated short-circuit making current(Peak) |
50 |
|||
|
10 |
Fuse rated current |
A |
125 |
||
|
11 |
Combined electrical equipments |
Rated transfer current |
A |
870 |
|
|
12 |
Rated short-circuit breaking current |
k |
20 |
||
|
13 |
Matching fuse model |
S£LAJ-12 |
|||
|
14 |
Mechanical life |
Times |
2000 |
10000 |
|
|
15 |
Auxiliary circuit1minPower frequency withstand voltage |
kV |
2 |
||
|
16 |
Working voltage of electric actuator |
V |
AC/DC 220/110 |
||
|
17 |
Protection level |
IP2X |
|||
Note: The above data is subject to change due to technical improvement.