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.
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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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.
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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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