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Auto Load Changeover Relay:
Automatic Load
Changeover Relay (PLCR) are designed to changeover the source of supply
to load where more than one source is available.
For different
applications, we have specific models. They are with load limited,
without load limited, transfer of load from one phase to other phase
and many additional functions.
Series PLCR-DS are
designed to connects mains supply to load till mains is present. On
mains failure and receiving generator power, it connects the load to DG
supply. During DG operation, load drawn is monitored. If the load
exceeds the allotted limit, it disrupts the load. On reducing the load
and till keeping it within the limit, load remains connected to DG
supply.
- Automation at no extra cost
- Generator power to all lighting points
- No separate wiring is required
- Assured availability of allotted current
- Space saving
- Tamper proof and maintenance free
- Safeguards Generator
- Fully solid state
- LED indication
- Wide range of single and three phase models.
For Single Phase Supply and Single Phase DG:
Model No. PL CR
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DS-25
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DS-25 A
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DS-40
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DS-60
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Mains supply
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Single Phase
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S.P.
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D.P.
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DG Supply
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Single Phase
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S.P.
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DP
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S.P.
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Load on Mains
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25 A
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41 A
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60 A
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Load limit on DG
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0.5 - 10 A
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0.5 - 20 A
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0.5 - 30 A
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Initial Delay
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5-10 Sec.
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Trip Delay
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4-20 Sec. (proportion to over load)
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Re-ser Time
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5-10 Sec.
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Enclosure
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ABS molded
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Sheet Steel
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Mounting
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Rail
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Wall/Panel
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For Three Phase Supply and Single Phase DG
Model No. PL CR-
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DST-25
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DS-T32
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DS-T63
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DS-T100
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Mains Supply
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Three Phase
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F.P.
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DG Supply
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Single Phase
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DP
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Load on Mains
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25 A
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32 A
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63 A
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100 A
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Load limit on DG
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1-10 A
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1-15 A
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2-25 A
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2-25 A
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Initial Delay
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5-10 Sec.
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Trip Delay
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4-20 Sec. (proportion to over load)
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Re-set Time
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5-10 Sec.
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Housing
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Sheet Steel
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Mounting
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Wall/Panel
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For Three Phase Supply and Three Phase DG
Model No. PL CR-
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DS-T25A
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DS-T32A
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DS-T63A
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DS-T100A
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Mains Supply
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Three Phase
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F.P.
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DG Supply
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Three Phase
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F.P.
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Load on Mains
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25 A
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32 A
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63 A
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100 A
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Load limit on DG
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1-10A
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1-15A
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2-25A
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2-25A
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Initial Delay
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5-10 Sec.
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Trip Delay
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4-20 Sec. (proportion to over load)
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Re-ser Time
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5-10 Sec.
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Housing
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Sheet Steel
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Mounting
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Wall/Panel
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Selecting the right changeover:
- If mains supply is 1Ph. go for PLCR-DS Series with proper rating as per total load
- If mains supply is 3 phases, slect from PLCR-DSTXX OR PLCRDSTXXA Models as per the available source from DG
- Load capacity for mains. While calculating this, add up total load irrespective of simultaneous operation or not.
- Series PLCR DST - total load will be connected to
1 Ph. - Supply of the DG and hence it is available across all load.
Series PLCR DSXXA load on each phase is monitored. System will trip if
load on any phase is over the set value. This series is ideal for three
phase load during DG.
- Generator load limit to be set in amperes
ignoring power factor. Hence there may be an apparent discrepancy in
equating ampere with watts especially at low power factor
- Series PLCRDS is suitable only for lighting loads
and is not recommended for air conditioning, motor, heating, or any
load requiring high in-rush current.
- Series PLCRDSA have a common "Neutral"
- It is advisable to connect MCB at the incoming supply mains and ELCB at the load outgoing side of the.
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