40.5kV Ring Main Unit

  • Description
Product Detail

XD Baoji Electric Co.,Ltd is one of the leading China 40.5kv ring main unit manufacturers and suppliers, as a professional company, our factory is able to produce quality 40.5kV RMU, 40.5kv ring main unit products at competitive price.

 Product Description
       XGN86-40.5 series Gas Filling RMU is three-phase A.C 50Hz indoor complete distributing equipment with the voltage range 40.5kV. It is used for secondary power distribution system, such as plant, wind power plant (Inside the tower), urban rail transit and metro to receive and distribute power. 
       The structure of this RMU is metal enclosed, cubical fixed, the gas-filled compartment of the RMU is made of stainless steel by way of laser welding. It can be equipped with load switch, load switch-fuse combination electric equipment, disconnector and circuit breaker. The wrong operation can be avoided due to its function of the ‘FIVE PROVENTION’. It can meet the standard requirments of IEC62271-200?IEC62271-103?IEC62271-105?IEC62271-1?GB3906?GB/T11022?GB3804? GB16926 etc.
       Overall dimension (W×D×H mm):450×950×1910.
Features of Product
       Altitude above sea level 1000m and below.
       Current rating up to 630 A/20kA.
        Internal arc classified (IAC):AFLR,20kA/0.5s.
       Equipped with load switch, load switch-fuse combination electric equipment, disconnector and circuit breaker.
       The internal barriers are made up of steel plate, and the loss of service continuity category (LSC) can meet the requirments of LSC2B.
       The gas-filled compartment is made of stainless steel sheet by way of laser welding, test by the helium leak detection, with good seal.
       Plug-in solid insulation busbar coupler between the cabinets, with simple in switchgear installation and expansion.
        Internal or external cone cable plug with simple and fast installation.
       On line monitoring of gas density function. 
       Design for wind power plant (Inside the tower), small size meet the requirments of the door of the tower.
Technical Parameters

Item

Unit

Data

load switch unit

load switch-fuse combination unit

circuit breaker unit

Rated voltage

kV

40.5

Rated current

A

630

40

630

Rated frequency

Hz

50

Rated short circuit breaking current

kA

/

31.5

20

Rated transfer current

kA

/

1000

/

Rated Short-time withstand current

Main circuit

kA/4s

20

/

20

Earthing switch

kA/2s

20

/

20

Earthing connect circuit

kA/2s

17.4

/

17.4

Rated peak withstand current

Main circuit

kA

50

/

50

Earthing switch

kA

50

/

50

Earthing connect circuit

kA

43.5

/

43.5

Degree of protection

Enclosure

IP4X

Gas-filled compartment

IP67

Rated insulation level

Rated power-frequency withstand voltage

kV/1min

95

Rated lightning impulse withstand voltage

kV

185

IAC

Fault current

kA

20

Duration

s

0.5

SF6 gas rated pressure (rel-20?)

MPa

0.04

SF6 gas alarm pressure (rel-20?)

MPa

0.02

 

 

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