Indoor metal-enclosed switchgear
Flexible design: fully assembled, expandable, with multiple installation methods, maintenance-free.
High safety: meets the requirements of 5 preventions, dual protection + visual operation and maintenance.
Easy operation: manual/electric dual-mode, supports remote control, stable mechanism.
Strong adaptability: unified installation dimensions, no modifications required, compatible with various cabinet layouts.
Efficient operation and maintenance: front maintenance, visual observation window reduces inspection and maintenance costs.
Wide application: wall-mounted devices available, suitable for indoor and outdoor power distribution.
HXGN-12 AC metal-enclosed switchgear (ring main unit)
I. Product Overview
HXGN-12 AC metal-enclosed switchgear (referred to as ring main unit, RMU) is a new type of high-voltage distribution system developed for urban power grid renovation and construction. It is suitable for interrupting load current, short-circuit current, and making short-circuit current in power systems.
The switchgear is equipped with a vacuum load switch and a spring mechanism, supporting both manual and electric operation modes. The earthing switch and disconnector have manual control mechanisms. With complete sets, compact size, no risk of burning or explosion, and reliable 'five-prevention' functions, it adapts to the safe operation requirements of various power distribution scenarios.
II. Detailed Technical Parameters
No. |
Item |
Unit |
FN12-10 |
FN25-12 |
1 |
Rated voltage |
kV |
12 |
12 |
2 |
1 minute power frequency withstand voltage |
kV |
42 kV to ground and phase-to-phase; Isolation gap 48 kV |
42 kV to ground and phase-to-phase; Isolation gap 48 kV |
3 |
Lightning impulse withstand voltage (peak value) |
kV |
75 kV to ground and phase-to-phase; Insulation breakdown 85 kV |
75 kV to ground and phase-to-phase; Insulation breakdown 85 kV |
4 |
Rated frequency |
Hz |
50 |
50 |
5 |
Rated current of main busbar |
A |
630 |
630 |
6 |
Rated current |
A |
630 |
630 |
7 |
Electrical service life at rated current |
Time |
Not less than 1000 |
Not less than 100 |
8 |
Bandwidthof no-load transformer |
kVA |
1250 |
1250 |
9 |
Rated thermal stability current |
kA/s |
20/4; Grounding switch 20/2 |
20/4; Grounding switch 20/2 |
10 |
Rated dynamic stable current (peak value) |
kA |
50 |
50 |
11 |
Rated short-circuit making current (peak value) |
kA |
50 |
50 |
12 |
Rated current of the fuse |
A |
100 |
100 |
13 |
Rated transmission current |
A |
1500 |
2000 |
14 |
Rated short-circuit breaking current |
kA |
31.5 |
31.5 |
15 |
Type of corresponding fuse |
/ |
S□LAJ-12 (XRNT□-10) |
S□LAJ-12 (XRNT□-10) |
16 |
Mechanical life |
Time |
2000 |
10000 |
17 |
1 minute of auxiliary circuit stress at power frequency |
kV |
2 |
2 |
18 |
Operating voltage of the electrical mechanism |
V |
AC/DC 220V, 110V |
AC/DC 220V, 110V |
19 |
Protection class |
/ |
IP2X |
IP2X |
20 |
Outline dimension (W×D×H) |
mm |
650(850)×900×2000(2200) |
650(850)×900×2000(2200) |
III. Ordering Instructions
When placing an order, the user provides the following materials:
Main circuit wiring diagram
Layout drawing of the distribution equipment installation
Auxiliary circuit and schematic diagram in the distribution equipment (if necessary)
Written materials for other special requirements
IV. Application Scenarios
Urban power grid upgrade and new power distribution projects
Power distribution rooms in residential and commercial complexes
Power distribution systems in industrial enterprises and outdoor box-type substations
Grid-connected power distribution systems for new energy generation
