Category：MV switchgear
Company brand：HAOCHENG
Tel：0757-85801981
Address：No. 32, Commercial Plaza, North District, Xingye North Road, Shishan Town, Nanhai District, Foshan City
Intro：HCM-12 gas insulated metal enclosed switchgear(referred as SF6 RMU)is highly reliable and almost maintenance free. It is suitable for 3.6-12kV power distribution system of ring or radial configuration. All live parts, including load break switch, circuit breaker,earthing switch and main busbar are sealed in a tank made of epoxy resin. Elbow-shape cable connectors are used for incoming and outgoing cables.
Product description
HCM-12 gas insulated metal enclosed switchgear(referred as SF6 RMU)is highly reliable and almost maintenance free. It is suitable for 3.6-12kV power distribution system of ring or radial configuration. All live parts, including load break switch, circuit breaker,earthing switch and main busbar are sealed in a tank made of epoxy resin. Elbow-shape cable connectors are used for incoming and outgoing cables.
The RMU is less affected by harsh service condition and it is suitable for use in the poor environmental condition and relatively restricted space, especially in pre-fabricated substation, underground substation, industrial and mining enterprises or in high humidity and heavily polluted area.
Construction features
1. Fully insulated and hermetically sealed. Switches,busbars and other high voltage live parts are sealed in epoxy resin tank,so it can be installed in wet, sand, dust,salt,sewage, mine and other areas without special precation measures.
2. Modularization, multi-function combination, high reliable and compact structure, less floor space.
3. Safe and realiable, long service life, maintenance free.
4. Assemblies expansion flexibility, can meet all kinds of complex distribution scheme.
5. It is specially suitable for pre-fabricated substation and cable branch box.
Main parameter
| Item | Scheme C | Scheme F | Scheme V | ||||
| LBS unit | LBS-fuse combination unit | Circuit breaker unit | |||||
| Rated voltage（kV） | 12 | 24 | 12 | 24 | 12 | 24 | |
| Rated current （A） | 630 | 630 | 125 | 125 | 630 | 630 | |
| Rated frequency（Hz） | 50 | 50 | 50 | 50 | 50 | 50 | |
| 1min power frequency withstand voltage（kV） | P to P, P to E | 42 | 65 | 42 | 65 | 42 | 65 |
| Break | 48 | 79 | 48 | 79 | 48 | 79 | |
| Lightning impulse withstand voltage（kV） | P to P, P to E | 75 | 125 | 75 | 125 | 75 | 125 |
| Break | 85 | 145 | 85 | 145 | 85 | 145 | |
| Partial discharge 1.1Ur（pC） | 20 | 20 | 20 | 20 | 20 | 20 | |
| Rated short time withstand current（kA/s） | 20/4 | 20/4 | - | - | 20/4 | 20/4 | |
| Rated peak withstand current（kA） | 50 | 50 | - | - | 50 | 50 | |
| Rated short circuit breaking current（kA） | - | - | 31.5 | 31.5 | 20 | 20 | |
| （30 times） | （30 times） | ||||||
| Rated short citcuit making current（kA） | 50 | 50 | 80 | 80 | 50 | 50 | |
| Rated resistive current switching test | cable charge current（A） | 10 | 16 | 10 | 16 | 25 | 31.5 |
| overhead wire charge current（A） | 1 | 1.5 | 1 | 1.5 | 10 | 10 | |
| Rated active load current switching test(times) | 100 | 100 | - | - | - | - | |
| Transit current（A） | - | - | 1750 | 1500 | - | - | |
| Internal arc test | cable chamber and gas chamber：IAC class AFLR，20kA，50kA（peak），0.5s-1s | ||||||
| Mechanical life（times） | CB | - | - | - | - | 20000 | 10000 |
| Isolating switch/earthing switch | - | - | - | - | 5000/5000 | 3000/3000 | |
| LBS/ Earthing switch | 10000/5000 | 5000/3000 | 10000/5000 | 5000/3000 | - | - | |
| IP class | Shell | IP4X | IP4X | IP4X | IP4X | IP4X | IP4X |
| Gas chamber | IP67 | IP67 | IP67 | IP67 | IP67 | IP67 | |
| 20℃ SF6 Gas rated filling pressure（Mpa） | 0.035-0.045 | 0.035-0.045 | 0.035-0.045 | 0.035-0.045 | 0.035-0.045 | 0.035-0.045 | |
| 20℃ SF6 Gas Min. functional pressure（Mpa） | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | |
