3-PHASE TO 1-PHASE VCB SELECTOR

12kV/24kV, 1250A, 26.3kA/3 SEC., 3-PHASE TO 1-PHASE, gANG OPERATED VCB SELECTOR

Purpose: The purpose of ‘SRlWlN’ 3-Phase to 1-Phase, Gang Operated VCB Selector is to extend 3-phase supply to particular urban/rural/agricultural feeders, for a given duration of the day and to switch over to extend 1-Phase supply to the same three phase lines of the feeders for the domestic customers connected to the three phase lines. These switching operations are performed automatically.


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3-Phase to 1-Phase, Gang Operated VCB Selector

3-Phase to 1-Phase, Gang Operated VCB Selector

This is flip box description.

12kV/24kV, 1250A, 26.3kA/3 SEC., 3-PHASE TO 1-PHASE, GANG OPERATED VCB SELECTOR

PRINCIPLE OF OPERATION

  • The Twin Feeder VCB cum 3-Phase to 1-Phase Changeover unit consists of two numbers of gang-operated, three pole Auto Re-closer type VCBs.
  • One gang operated VCB will switch ON for extending 3-phase supply and the other gang operated VCB will Switch ON for extending 1-Phase supply.
  • Whenever generation is good, or in any duration of the day-say from 7AM to 6PM-three Phase Supply can be extended to the agricultural feeders.
  • Whenever generation reduces or there is any voltage drop in the distribution grid or in any given duration of day/night-say, between 6PM to 7AM-1-Phase Supply can be extended to the
    agricultural feeders.
  • This will ensure that three phase agricultural loads can be operated only when there is
    sufficient power availability in the grid.
  • When power scarcity is there, three phase power supply to agricultural feeders is automatically/manually cut-off, so that large three phase agricultural loads cannot be operated during such times.
  • But, at the same time single phase domestic consumers connected to these agricultural feeders
    are not affected, as single-phase supply is extended to all the three lines, even during such power scarcity times.
  • All such change-over from 3-Phase supply to 1-Phase supply and vice versa can be monitored and controlled. thro select mobile phones.
  • All the events, settings, meter readings, status, etc. can also be viewed at any time in the select mobile phones.
  • All the operations, monitoring and control can also be effected from SCADA/DMS

Salient Features

  • Mechanical and electrical interlocks are provided between the two VCBs, to prevent simultaneous
    closing of both the VCBs.
  • However, it is possible to keep both the VCBs OFF at the same time.
  • The VCB Selector Switch will be operated On-load.
  • The operating mechanism is magnetic actuator
  • Compact and light-weight
  • Robust Construction
  • Suitable for Outdoor Duty, protected to Degree of Protection IP65.
  • It is possible to install the VCB Selector Switch in an existing Pole/Structure
  • The VCB Selector Switch will be electrically operated, with a provision for manual tripping
  • The insulation medium is solid dielectric & the in-terruption medium is vacuum
  • SCADA/DMS compatible
  • Mechanical and electrical ON/OFF indications
  • The control cabinet suitable for outdoor duty, with IP55 degree of protection, and of
    light weight and is suitable for Pole/Structure mounting
  • The Incoming as well as Outgoing Bushings of the VCB Selector Switch are of universal type, suitable for terminating ACSR OH Conductor or Aluminium/Copper Cable
  • The VCB Selector Switch has an in-built comprehensive Protection Unit, with a set of suitably
    rated integral Current Transformers, embedded in the VCB bushings.
  • Flexible Protection Options-from basic Over-current & Earthfault Relay to comprehensive Feeder
    Manager
  • Optional Metering-from basic ammeter to comprehensive communicable multi-function meter

Guaranteed Technical Particulars


PARAMETER

12kV

24kV

Rated Voltage (kV)

12

24

Rated Frequency (Hz.)

50/60

50/60

Rated Current (A)

1250

1250

Rated Insulation Level (kV)

12/28/75

24/50/125

Rated Short Time Withstand Current for 3Sec. (kA)

26.3

26.3

Rated Short Circuit Breaking Capacity (kA)

26.3

26.3

Rated Short Circuit Making
Capacity (kAp)

65.75

65.75

Closing Time

< 60ms

< 60ms

Opening Time

< 40ms

< 40ms

Rated Operating Sequence

0-300ms-CO-3 min.-CO

0-300ms-CO-3 min.-CO

Rated Mechanical Life

20000 Operations

20000 Operations

Rated Electrical Life at Rated Current

20000 Operations

20000 Operations

Rated Electrical Life at Rated Short Circuit Breaking Current

100 operations

100 operations

Type of Operating Mechanism

Magnetic Actuator

Magnetic Actuator

IP Grade of Switching Unit

IP65

IP65

IP Grade of Control Cabinet

IP65

IP65

ON/OFF Indication

Both Mechanical & Electrical

Both Mechanical & Electrical

Applicable Standard

IS/IEC 62271-100 & IS/IEC 60529

IS/IEC 62271-100 & IS/IEC 60529

Auxiliary Voltage

24V DC & 23OV AC

24V DC & 23OV AC

Auxiliary Voltage Tolerance

85% to 110%

85% to 110%

Manual Trlp Operation

Possible

Possible

Type of Insulation

Solid Dielectric

Solid Dielectric

Aux. Contacts

4 N.O. + 4 N.C. in each of the 2 positions

4 N.O. + 4 N.C. in each of the 2 positions

SCADA Compatible

YES

YES

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3-Phase to 1-Phase Gang Operated VCB Selector

The purpose of ‘SRlWlN’ 3-Phase to 1-Phase, VCB Selector is to extend 3-phase supply to particular urban/rural/agricultural feeders, for a given duration of the day and to switch over to extend 1-Phase supply to the same three phase lines of the feeders for the domestic customers connected to the three phase lines. These switching operations are performed automatically.

3-Phase to 2-Phase Gang Operated VCB Selector

The purpose of ‘SRlWlN’ 3-Phase to 2-Phase, VCB Selector is to extend 3-phase supply to particular urban/rural/agricultural feeders, for a given duration of the day and to switch over to extend 2-Phase supply to the same three phase lines of the feeders for the domestic customers connected to the three phase lines. These switching operations are performed automatically.

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