Rockwill Electric Group
Outdoor Gas Insulated Ring Main Unit
Rockwill outdoor SF6 Gas Insulated Ring Main Unit. OMR is a outdoor SF6 gas Insulated ring main unit for the secondary distribution network. OMR can be supplied in 10 different configurations like CVC, CCV, CVV, CFF, CCC, VVV, CCVV, etc. ...

Detailed description

  • Description
  • Technical data of outdoor ring main unit
  • Installation way of outdoor ring main unit

Outdoor SF6 Gas Insulated Ring Main Unit - Rockwill Brand

OMR is a outdoor SF6 gas Insulated ring main unit for the secondary distribution network. RMU(OMR) can be supplied as a 3 or 4-way standard configurations with additional equipment according to customer specification. OMR can be supplied in 10 different configurations (Such as CVC, CCV, CVV, CFF, CCC, VVV, CCVV etc) suitable for most switching applications in 12/24 kV distribution networks.

It is extendable and combined with our own developed technology concept, which is flexible, modular compact switchgear, they represent a complete solution for 12/24 kV secondary distribution networks. OMR have identical user interfaces.

OMR 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.

The OMR concept offers a choice of either switch-fuse combination or circuit-breaker with relay for protection of the transformer. OMR can be supplied with an integrated remote control and monitoring unit.

This product is in conformity with the standards: IEC62271-200, IEC60420

 

Note: Available modules of Safe Plus outdoor RMU(OMR) are:

C: Cable load switch module (disconnecting switch)

F: Load-fuse switch combination module

V: Circuit breaker, disconnecting switch combination module

 

Service environment Outdoor SF6 Ring Main Unit

a) Air temperature: Maximum temperature: +45℃; Minimum temperature: -20℃

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

No
Item
Unit
Load Break Switch
Circuit Breaker
1
Rated voltage
kV
12/17.5
24
12/17.5
24
2
Rated current
A
630
3
Rated frequency
Hz
50/60
4
1min Power frequency withstand voltage
kV
38/45
55
38/45
55
5
Lightning impulse withstand voltage
kV
75/95
125/150
75/95
125/150
6
Rated transfer current
A
1700
1400
 
7
Rated active load and close circuit breaking current
A
630/1250
8
Rated cable charge breaking current
A
50&10
9
Rated short circuit breaking current
kA
 
20
16
 
10
 
Rated short circuit making current(peak)
 
kA
 
63
 
50
 
63
 
50
11
Short time (2s) withstand current, load switch/earth
kA
25/20
20/20
25/20
20/20
12
Rated withstand current(peak)
kA
63
50
63
50
13
Mechanism life
Times
3000
10000
3000

The floor must be well leveled and unit must be fixed on the anchor bolts in accordance with the number of modules or units to ensure the dimensional drawing.

Single Line Diagram on 3 Leg Outdoor RMU (CVC):

single line diagram of outdoor ring main unit

Structure Diagram on 3 Leg Outdoor RMU (CVC):

outdoor ring main unit dimension

outdoor ring main unit size

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