DVCAS Switchgear Gas-Insulated Ring Main Units

General

DVCAS medium voltage (MV) switchgear from Schneider Electric is designed to meet the electrical switching, protection, and connection needs of wind farm applications up to 38 kV. Three different modules are available:

• Transformer protection module D

• Outgoing line module O

• Incoming line module I

For standard wind power applications, a maximum of four modules can be connected in various configurations to provide the most commonly used wind power functions.

DVCAS switchgear is designed, manufactured, and tested in accordance with the following standards:

• C37.20.3-9

• C37.54

• CAN/CSA C22.2 No.31-M89

• UL Listed

• IEEE Cable Bushings

Transformer Protection Module D

DVCAS switchgear module D provides transformer protection. Construction features include:

• Metal base frame

• Operating mechanism and relay compartment

• disconnector operating mechanism

• operating mechanism of the circuit breaker

• protection relay VIP, Sepam, or Micom

• zero sequence current transformer CSH 30

• MV cable compartment

• bushings for cable connection

• Three CRc current sensors per phase

• Stainless steel, gas-tight tank

• busbar system

• three position disconnector

• circuit breaker

Outgoing Line Module O

DVCAS switchgear module O functions as an outgoing line to a downstream wind generator. There are two medium voltage cables per phase. Construction features include:

• Metal base frame

• Voltage presence indicator

• MV cable compartment

• bushings for cable connection

• clamps for MV cable connection

Incoming Line Module I

DVCAS switchgear module I is a three-position switch-disconnector. It is recommended for the incoming line function from an upstream wind generator for the following reasons:

• Reduces downtime caused by faults

• Helps with fault detection

• Reduces interruptions due to maintenance work

• Improves energization works

Module I is always connected to module D on the right with single-phase, coupling bushings. Construction features include:

• Metal base frame

• Operating mechanism compartment

• operating mechanism of the switch-disconnector

• motor for the operating mechanism (optional)

• MV cable compartment

• bushings for cable connection

• Stainless steel, gas-tight tank

• busbar system

• three position disconnector

Ratings