| Brand | ROCKWILL |
| Model NO. | 36kV 40.5kV 44kV 45kV Pure air insulated Ring Main Unit (RMU) / switchboard panel |
| Rated voltage | 40.5kV |
| Rated normal current | 630/800A |
| Rated frequency | 50/60Hz |
| Series | SM66 |
Description ：
Pioneer in China's eco-friendly switchgear sector, we have specialized in R&D and manufacturing of SF₆-free switchgear for decades. With core technologies, we have established industry standards. Boasting a fully independent end-to-end production chain, we have built a product matrix of zero-emission and high-reliability eco-friendly switchgear, making us a trusted choice for power grid construction.
SM66 unit type SF6 ring net cabinet with SF6 load switch as main switch, for whole cabinet is suitable for electric distribution automation and compact also expandable metal close switchgear. It characters in its simple structure, flexible operation, reliable interlocking and convenient installation etc.which can provide the satisfactory technical projects both for different application occasions and users. With the adoption of sensor technology and the protection relay up to date, plus the advanced technology and flexible assembly project, SM66 unit type SF6 ring net cabinet can completely meet the requirement of continuously variable market.
Main function :
Good Insulation Performance；
Strong Arc Extinguishing Ability；
Excellent safety performance ；
Flexible and Reliable Operation；
Compact Structure and Modular Design；
High Degree of Intelligence.
Technology parameters:
The voltage classes of some of these eco-friendly switchgears include 6kV, 6.3kV, 6.6kV, 6.9kV, 7.2kV, 10kV, 10.5kV, 11kV, 11.5kV, 12kV, 13.2kV, 13.8kV, 14.5kV, 14.4kV, 15kV, 15.5kV, 15.6kV, 17.5kV, 20kV, 21.9kV, 22kV, 24kV, 30kV, 33kV, 33.5kV, 34.5kV, 35kV, 36kV, 38kV, 38.5kV, 40.5kV, 44kV, 45kV, 46kV, 66kV and 69kV. and customization is available.
No |
Item |
Unit |
Parameter |
||
1 |
Rated voltage |
kV |
36 |
40.5 |
|
2 |
Rated frequency |
Hz |
50/60 |
||
3 |
Rated current |
A |
630/800 |
||
4 |
1min Power frequency withstand voltage |
wet |
kV |
70 |
95 |
dry |
kV |
80 |
110 |
||
5 |
Lightning impulse withstand voltage |
kV |
170 |
185 |
|
6 |
Rated short circuit breaking current (peak) |
kA |
195 |
215 |
|
7 |
Rated active load and close circuit breaking current |
A |
400/630 |
||
8 |
Rated transferring current |
A |
1200 |
1000 |
|
9 |
Rated short circuit making current (peak) |
kA |
63 |
63 |
|
10 |
Rated cable offload |
A |
50 |
||
11 |
Transformer offload |
A |
16 |
||
12 |
Rated withstand current (peak) |
kA |
63 |
||
13 |
Short time withstand current (2s) |
kA |
25 |
||
14 |
Mechanism life |
times |
2000 |
2000 |
|
Outline dimension drawing:
Fixing of units：
What is the purpose of a ring main unit RMU?
A:Ring main unit (RMU) is used to distribute electrical power in a medium - voltage distribution network. It allows for sectionalizing the network, isolating faults, and enabling power transfer between different sections of the ring - shaped power network, ensuring reliable power supply.
What does the RMU stand for?
A：RMU stands for Ring Main Unit. It is a type of electrical switchgear used in medium-voltage electrical distribution systems, typically for distributing power in a ring circuit configuration.
