Description

Outdoor SF6 gas insulated Ring Main Unit - Beierbian Group

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

Technical data of outdoor ring main unit

No	Item	Unit	Load BreakSwitch		CircuitBreaker
1	Ratedvoltage	kV	12/17.5	24	12/17.5	24
2	Ratedcurrent	A	630
3	Ratedfrequency	Hz	50/60
4	1min Power frequency withstandvoltage	kV	38/45	55	38/45	55
5	Lightning impulse withstandvoltage	kV	75/95	125/150	75/95	125/150
6	Rated transfercurrent	A	1700	1400
7	Rated active load and closecircuit breakingcurrent	A	630/1250
8	Rated cable charge breakingcurrent	A	50&10
9	Rated short circuit breakingcurrent	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	Mechanismlife	Times	3000		10000	3000

Installation way of outdoor ring main unit

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):

Outdoor Gas Insulated Ring Main Unit