Ring Main Unit is a set of transmission and distribution electrical equipment (high-voltage switchgear) installed in metal or non-metal insulated cabinets or made into assembled interval ring network power supply units. Its core part adopts load switches and fuses, and has the advantages of simple structure, small size, low price, improved power supply parameters and performance, and power supply safety. It is widely used in distribution stations and box type substations of load centers such as urban residential areas, high-rise buildings, large public buildings, factories and enterprises.
•It adopts prefabricated electrified and touchable silicone rubber cable head, which is fully sealed, fully insulated, maintenance-free, and reliable to ensure personal safety.
•Compact structure, small and beautiful appearance, stainless steel cabinet, service life up to more than 20 years.
•Under the premise of not affecting the operation of the main network, realize regional power outage maintenance and reduce the scope of power outages.
•It can be equipped with one or more SF6 load switches.The wiring method is flexible and diverse, the branch outgoing line can reach 8 loops at most.
•Optional lightning arrester, short-circuit fault indicator, current-limiting fuse, etc., to meet various requirements of users.
Basic Info.
Model NO. | Ring Main Unit | Usage | Power industry |
Specification | ANSI/IEEE/IEC | Trademark | Customized |
Origin | Hefei, China | HS Code | 8537209000 |
Parameters
No | Item | Unit | Parameter | |
1 | Rated voltage | kV | 7.2kV 12kV 17.5kV 24kV | 36kV 40.5kV |
2 | Rated Frequency | HZ | 50/60 | 50/60 |
3 | Rated current | A | 630,1250,1600,2000, 2500,3150,4000 | 630,1250,1600,2000, 2500,3150,4000 |
4 | Branch busbar rated current | A | 630,1250,1600,2000, 2500,3150,4000 | 630,1250,1600,2000, 2500,3150,4000 |
5 | Main busbar rated current | A | 630,1250,1600,2000, 2500,3150,4000 | 630,1250,1600,2000, 2500,3150,4000 |
6 | 1 min Power Frequency Withstand Voltage (Wet/Dry) | kV | 38/48,50/60,60/65 | 70/95 |
7 | Lighting Impulse Withstand Volage | kV | 75,95,125 | 170.185 |
8 | Rated Short Circuit Breaking Current (Peak) | kA | 40/50/63/80/100 | 40/50/63/100 |
9 | Short time withstand current (4s) | kA | 20/25/31.5/40 | 20/25/31.5/40 |
10 | Protection Type | IP4X For housing | IP4X For housing | |
Ring Main Unit is a set of transmission and distribution electrical equipment (high-voltage switchgear) installed in metal or non-metal insulated cabinets or made into assembled interval ring network power supply units. Its core part adopts load switches and fuses, and has the advantages of simple structure, small size, low price, improved power supply parameters and performance, and power supply safety. It is widely used in distribution stations and box type substations of load centers such as urban residential areas, high-rise buildings, large public buildings, factories and enterprises.
•It adopts prefabricated electrified and touchable silicone rubber cable head, which is fully sealed, fully insulated, maintenance-free, and reliable to ensure personal safety.
•Compact structure, small and beautiful appearance, stainless steel cabinet, service life up to more than 20 years.
•Under the premise of not affecting the operation of the main network, realize regional power outage maintenance and reduce the scope of power outages.
•It can be equipped with one or more SF6 load switches.The wiring method is flexible and diverse, the branch outgoing line can reach 8 loops at most.
•Optional lightning arrester, short-circuit fault indicator, current-limiting fuse, etc., to meet various requirements of users.
Basic Info.
Model NO. | Ring Main Unit | Usage | Power industry |
Specification | ANSI/IEEE/IEC | Trademark | Customized |
Origin | Hefei, China | HS Code | 8537209000 |
Parameters
No | Item | Unit | Parameter | |
1 | Rated voltage | kV | 7.2kV 12kV 17.5kV 24kV | 36kV 40.5kV |
2 | Rated Frequency | HZ | 50/60 | 50/60 |
3 | Rated current | A | 630,1250,1600,2000, 2500,3150,4000 | 630,1250,1600,2000, 2500,3150,4000 |
4 | Branch busbar rated current | A | 630,1250,1600,2000, 2500,3150,4000 | 630,1250,1600,2000, 2500,3150,4000 |
5 | Main busbar rated current | A | 630,1250,1600,2000, 2500,3150,4000 | 630,1250,1600,2000, 2500,3150,4000 |
6 | 1 min Power Frequency Withstand Voltage (Wet/Dry) | kV | 38/48,50/60,60/65 | 70/95 |
7 | Lighting Impulse Withstand Volage | kV | 75,95,125 | 170.185 |
8 | Rated Short Circuit Breaking Current (Peak) | kA | 40/50/63/80/100 | 40/50/63/100 |
9 | Short time withstand current (4s) | kA | 20/25/31.5/40 | 20/25/31.5/40 |
10 | Protection Type | IP4X For housing | IP4X For housing | |
