| Brand | ROCKWILL |
| Model NO. | Outdoor Gas Insulated Ring Main Unit-22kV |
| Rated voltage | 24kV |
| Rated frequency | 50Hz |
| Series | RMR |
Description
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22kV Electrical Ring Main Unit (RMU)
22kV electrical ring main unit (RMU)switchgear refers to the ring network power distribution network. Its main function is to realize dual-loop or multi-loop power supply to improve the reliability of power supply.
Because of its small size, safe operation and simple structure, it is widely used in buildings, ports, shopping centers and railways.
The ring main unit switchgear has two feeder forms, namely the incoming unit and the outgoing unit. The incoming unit is connected to the high-voltage side, and the outgoing unit (usually an F module) is connected to the distribution transformer. It can protect the secondary transformer from transients on the load or power supply side.
22kV RMU is a device used in electrical distribution systems, mainly to isolate and control the electrical energy of high-voltage lines, in order to ensure the safety and stable supply of electricity. Its characteristic is that it has various advantages such as high reliability, safety, and applicability, and is an indispensable part of modern power systems.
The composition structure of the 22kV ring network cabinet is relatively complex, usually consisting of various components such as the main switch, load switch, fuse, and voltage and current sensors. The main switch is mainly responsible for controlling the on-off of high-voltage lines, while the load switch is used to control the flow of electricity during the transmission process, achieving regulation and control of the electrical system. A fuse is a protective measure that can cut off the circuit in a short period of time when abnormal situations such as overcurrent or short circuit occur in the system, ensuring the safe and stable operation of the power system. Voltage and current sensors can achieve the judgment and monitoring of current and voltage information, and have important sensing and feedback functions.
The 22kV ring network cabinet has a wide range of applications, mainly used in various power systems such as urban power grids, industrial and mining enterprises, and rural power grids. In important occasions, such as broadband switch rooms, computer rooms, etc., the 22kV ring network cabinet is also an essential power equipment. It can play an important role in isolating, distributing, and protecting circuits, ensuring the safe, reliable, and stable supply of power supply
Data Sheet:
| Ring6 24kV | C-module | F-module | v-module | ||||
| Switch disconnector | Earthing switch | Switch-fuse disconnector | Downstream earthing switch | Vacuum circuit-breaker | Earthing switch/ disconnector | ||
| Rated voltage | kV | 12/17, 5/24 | 12/17,5/24 | 12/17,5/24 | 12/17,5/24 | 12/17,5/24 | 12/17,5/24 |
| Rated frequency 5) | Hz | 50/50/50 | 50/50/50 | 50/50/50 | 50/5 0/50 | 50/50/50 | 50/50/50 |
| Power frequency withstand voltage | kV | 284)/38/50 | 284)/38 /50 | 284,/38 /50 | 284,/38 /50 | 284)/38/50 | 284)/38/50 |
| Lightning impulse withstand voitage | kV | 95/95/125 | 95/95/125 | 95/95/125 | 95/95/125 | 95/95/125 | 95/95/125 |
| Rated normai current | A | 6 30/630/630 | 2001) | 200/200/200 | |||
| Breaking capacities: | |||||||
| -active load | A | 630/630/630 | |||||
| -closed loop | A | 650/650/650 | |||||
| -offload cable charging | A | 140/140/140 | |||||
| -offload transformer | A | 20/20/20 | |||||
| -earth-fault | A | 205/160/160 | |||||
| -earth-fault cable charging | A | 117/91/91 | |||||
| -short-circuit breaking current | kA | see2) | 16/16/16 | ||||
| Marking capacity | kA | 52,5/40/40 | 52,5/40/40 | see2) 5 | 12,5/12,5/12, | 40/40/40 | 40/40/40 |
| Short tirne current 3 sec,3) | kA | 21/16/16 | 21/16/16 | 16/16/16 | 16/16/16 | ||
| 1) Depending on the current rating of the fuse-link 2) Limited by high voltage fuse-links 3) Maximum rating for bushings Interface C (400 series bolted) 4) GOST version is available with 42kV power frequency to withstand voltage 5) For rated frequency 60Hz de-rating for current parameter needs to be applied |
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