Design

CG commenced manufacturing of vacuum contactors in the year 2001-02. This technology has been developed in-house by CG. The vacuum contactors manufactured are in the kV range of 1.1 kV to 12 kV. Since then nearly 7000 contactors have been supplied to Indian and international customers.

Salient features of CG make vacuum contactors:

1. Highly mechanical & electrical life.
2. Flexibility in selection of pole units for specific applications
   like neutral grounding, soft starters etc.
3. Very high reliability because of few moving parts
4. Low maintenance
5. Cost effective and compact
6. Low chopping current
7. Totally encapsulated structure for higher reliability in dusty
   and corrosive atmosphere.
8. Vacuum Interrupter, that is the heart of the vacuum contactor, comes from our own vacuum interrupter plants, who are market leaders in India.

The construction of the product is evaluated and validated by state-of-art electro static & magnetic field analysis software at our own R&D. This ensures uniform distribution of electrical and mechanical stress.

Applications

1. Capacitor Switching for reactive power compensation
2. switching of reactors
3. Resistive load switching in heaters, ventilation system melting furnace.
4. Neutral grounding of generator operations of soft starters.
5. Motor switching in areas like:
• Pumping stations
• Crawler cranes; forward reverse operation in mines
• Lift hoists

6. Transformer switching

Vacuum Contactor Type

Units

VC-400

VC-630

MVC-400

MVC-400L

CS-VP11

CS-VP11L

Frequency

50/60

50/60

50/60

50/60

50/60

50/60

Hz

Rated Voltage

1

1

7.2

7.2

12

12

kVrms

Rated operational current

400

630

400

400

400

Arms

Reference Standard

IEC-947

IEC-947

IEC-470

IEC-470

IEC-470

IEC-470

___

Utilization category

AC3/AC4

AC3/AC4

AC4

AC4

AC4

AC4

___

Rated Breaking Current

3.2

5

3.2

3.2

3.2

3.2

KA

Rated Making Current

4

6.3

4

4

4

4

KA rms

Short Time Current/Time

3.2

5

3.2

3.2

3.2

3.2

KA rms

Dielectric withstand(P.F for 1 min)

10

10

20

20

28

28

kVrms

BIL withstand(1.2/50 micro sec)

36

36

60

60

75

75

kV peak

No. of pole units

3

3

1,2,3

1,2,3

1,2,3

1,2,3

nos

Switching Mechanism

solenoid

solenoid

solenoid

Mechanical Latch

solenoid

Mechanical latch

___

Switching Frequency(V1)

1200

1200

1200

1200

1200

1200

Ops/Hr

Switching Frequency(mech)

___

____

180

60

180

60

Ops/Hr

Closing Time

115

115

115

115

115

115

ms

Opening time

50

50

50

30

50

30

ms

No. of Auxiliary contact

4NO+4NC

4NO+4NC

4NO+4NC

4NO+4NC

3NO+3NC

3NO+3NC

___

Auxiliary contact rating(AC)

___

____

500/16

500/16

500/16

500/16

V/A rms

Rated control Voltage(AC)

110/240/415

110/220

110/220

110/220

110/220

V rms

Rated control Voltage(DC)

24/46/110/220

24/110/220

24/110/220

24/110/220

24/110/220

24/110/220

V rms

Closing coil crush current (110/220V)

25/25

25/25

9/4.5

9/4.5

9/4.5

9/4.5

Amp

Holding coil crush current (110/220V)

2.5/1

2.5/1

2/1

____

2/1

____

Amp

tripping coil crush current (110V)

------

------

-------

1.5

_____

1.5

Amp

Application/Rated Performance

Motor

3500

3500

6000

6000

KW

Transformer

4800

4800

7500

7500

KVA

Capacitor

!800

1800

3000

3000

KVAR

Weight

23

23

23

28

34

49

Kg

Dimension H

285

285

316

316

380

380

mm

W

220

220

210

305

245

350

mm

D

260

260

400

400

500

500

mm

W

170

170

327

327

365

365

mm

D

222

222

162.5

162.5

172

172

mm

11

11

9

9

12

12

mm