24kV SF6 Ring Main Unit RMU, CCVV 4 way: 2 switch + 2 vaccum circuit breaker
20kV 24kV SF6 Gas Insulated Ring Main Unit Switchgear RMU,CCVV 4 way: 2 switch + 2 vaccum circuit breaker
Standards
IEC 62271-100 high voltage alternating current circuit breakers
IEC 62271-105: alternating current switch-fuse Combination
IEC 62271-102: alternating current disconnectors and earthing switches
IEC 62271-200 A.C. metal enclosed switchgear and controlgear for rated voltage above 1 kV and up to and including 52 kV
IEC 62271-103 high voltage switches for rated voltage above 1 kV and less than 52 kV
IEC 60694: Common specifications for high-voltage switchgear and controlgear standards
IEC 60265-1 Switches for rated voltages above 1 kV and less than 52 kV
IEC 60529: Degrees of protection provided by enclosures (IP Code)
Service environment:
a) Air temperature:Maximum temperature: +40℃; Minimum temperature:-25℃
b) Humidity:Monthly average humidity 95%; Daily average humidity 90% .
c) Altitude above sea level:Maximum installation altitude: 2500m
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e) No frequent violent shake
Technical data
Item | Unit | Switch | Switch-fuse | Vacuum circuit-breaker |
Rated voltage | kV | 24 | 24 | 24 |
Power frequency withstand voltage | kV | 50 | 50 | 50 |
Impulse withstand voltage | kV | 125 | 125 | 125 |
Rated current | A | 630 | 2001) | 200 |
Breaking capacities: |
|
|
|
|
active load | A | 630 |
|
|
closed loop | A | 670 |
|
|
off load cable charging | A | 141 |
|
|
off load transformer | A |
| 20 |
|
earth fault | A | 160 |
|
|
earth fault cable charging | A | 91 |
|
|
short-circuit breaking current | kA |
| see 2) | 16 |
Making capacity | kA | 40 | see 2) | 40 |
Short time current 0,5 sec | kA |
|
| 16 |
Short time current 1 sec | kA |
|
| 16 |
Short time current 3 sec | kA | 16 |
|
|
1) Depending on the current rating of the fuse-link 2) Limited by high voltage fuse-links
SafeCladTM gas insulated ring main unit is for the secondary distribution network 11/17.5/24/36 kV. It is a completely sealed system with a stainless steel tank containing all live parts and switching functions. A sealed steel tank with constant atmospheric conditions ensures a high level of reliability as well as personnel safety and a virtually maintenance-free system.
It offers a choice of either switch-fuse combination or circuit-breaker with relay for protection of the transformer. SafeRing can be supplied with an integrated remote control and monitoring unit.
Switch Module:
The switch Module is a three position switchdisconnector and earthing switch using SF6 gas as an arc quenching medium.
The switch position is close - open - earthed. In the open position the switch satisfies the disconnector requirements.
F Module:
The switch-fuse module has a three position switch disconnector and earthing switch identical to the switch module.
By means of the fuse tripping device it operates as a switchfuse combination. There is a double earthing switch which in earthed position connects earth to both sides of the fuse-links simultaneously.
Both earthing switches are operated in one operation. The switch-fuse and earthing switch is mechanically interlocked to prevent hazardous access to the fuse-links.
The lower cover which gives access to the fuse-links is also mechanically interlocked with the earthing switch.
V Module:
The vacuum circuit-breaker module has vacuum bottles as interrupters of the current.
In series with the circuit-breaker main circuit is connected a three-position disconnector / earthing switch.
The operation between vacuum circuit-breaker and disconnector/ earthing switch is mechanically interlocked.
Cable Connection:
Installation:
Glances in workshop:
Why choose us
| Hunan Electric Union is a diverse electric equipment manufacturer group located in middle south of China. |
| Limit Innovation |
| We are in a traditional business since transformers and switches are developed over hundred years, even the so called “new technologies” of cast resin technology, vacuum arc distinguish technology and digital protection technology have been used for decades. Based on industry characteristics and to focus on products manufacturing itself, we implement a “limit innovation” policy on our mature products |
| 1. Update products only if latest standards revision officially issued 2. Produce new products only if related technology are maturely developed. 3. Focus limit innovation on external updates to make products easy to use and transport. |
| Our Mission |
Eventually, we could help the developing regions to update their energy quality and improve people’s life. |
Products 2. Gas insulated switchgear (GIS) 72.5-252kV 11. Compact Substation |
Services |
| Products Features We defined four rules to estimate our products, 1. Standards: All products should comply with IEC or IEEE standard codes. 2. Requirements: All products should comply with technical agreement from end user. 3. Easy to Use: All products should tested in factory and deliver with full, readable drawings and manuals. 4. Fit to Container: All products should designed to load on a container. |
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