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VCB

low maintenance, suitable for system upto 24KV, Extensible and Non Extensible indoor and outdoor type with inbuilt fuses.

Products / Description Principals & Makers
Type Rated Voltage Insulation Level KV/KVP Normal Current Fault Making Current Operating Machanism
Ring Switch 15.5 28/110 630 55 Independent Manual Spring closing /Tripping
Fuse Switch 15.5 28/110 400 55

low maintenance, suitable for system upto 24KV, Extensible and Non Extensible indoor and outdoor type with inbuilt fuses.

Grompton Greaves.
Products / Description Principals & Makers

* Maintenance Free
* Exceptionally Long Service life
*Compact
* Vertical Isolation Horizontal Drawout.
11 KV Vaccum Circuit Breaker type UNIVAC

(VCB) with CT's, PT,
IDMT Relay ( E/F & O/C)
and Auxillary Relays.

for protection purposes.


11 KV

Vaccum Circuit Breaker

ABB

Technical DetailsABB

  Technical Details
Description Unit Rating
  Circuit breaker type
VBF36.16.25
  Rated Voltage
kV
36
  Power Freq. withstand voltage
kVrms
70
  Impulse withstand voltage
kVpeak
170
  Rated frequency
Hz
50
  Creepage dist to earth
mm
900
  Rated normal current
A
1250
  Rated breaking current
kA
26.3
  Rated short time withstand current
kA for 3 sec
26.3
  Rated making current
kApeak
65.75
  First pole to clear factor
1.5
  Duty cycle
O-0.3sec-CO-3min-CO/CO-15s-CO
  Opening time
ms
50 + 10
  Total break time
ms
65 + 10
  Closing time
ms
60 + 10
  Reclosing time
ms
300
  Contact stroke
mm
20
  No. of breaks/ pole
1
  Weight (approx.)
Kg
800
Vacuum Circuit Breakers (Outdoor)
  Technical Details
Description Unit Rating
  Circuit breaker type
VBF36.16.25
  Rated Voltage
kV
36
  Power Freq. withstand voltage
kVrms
70
  Impulse withstand voltage
kVpeak
170
  Rated frequency
Hz
50
  Creepage dist to earth
mm
900
  Rated normal current
A
1250
  Rated breaking current
kA
26.3
  Rated short time withstand current
kA for 3 sec
26.3
  Rated making current
kApeak
65.75
  First pole to clear factor
1.5
  Duty cycle
O-0.3sec-CO-3min-CO/CO-15s-CO
  Opening time
ms
50 + 10
  Total break time
ms
65 + 10
  Closing time
ms
60 + 10
  Reclosing time
ms
300
  Contact stroke
mm
20
  No. of breaks/ pole
1
  Weight (approx.)
Kg
800
Rear view with back cover open

Certified routine tests
Each breaker is subjected to the following routine tests in the factory as per ANSI C 37.09 and IEC - 62271-100.

  • Verification of components
  • Nominal, low, high tripping coil voltage: i.e. at 70%, 110% & 100% of nominal voltage*
  • Nominal, low, high spring charging motor voltage at 85%, 110% & 100% of nominal voltage*
  • Trip free operation
  • Control wiring: 2000V to ground for 1 minute (if applicable)
  • Power frequency voltage withstand test for 1 minute at 70kV
  • Opening and closing speed
  • Contact resistance
  • Anti-pumping test

General Arrangement Drawing

Sectional View of Pole Part

Close-up of Operating Mechanism with electrical accessories

General arrangement drawing – VHA 36


Indoor switchgear, circuit breaker type HPA

SF6 Insulated Indoor Ring Main Unit - Compact Switchgear





Compact Secondary Substation (CSS)