VOLTAGE SCANNER
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PROTECTION PROVIDED
• LOW Voltage Tripping
• HIGH Voltage Tripping
• Phase Unbalance protection
• Protection against SINGLE PHASING.
• Protection against REVERSE PHASING.
• Time Delay
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Salient Features :
• Very High Accuracy
• Wide Range of Supply Variation
• Protection against Under Voltage
• Protection against Over Voltage.
• Indication for High Voltage, Low Voltage Single Phasing & Reverse Phasing along with Healthy indication.
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• Single Phasing Protection.
• Protection for Reverse Phasing
• Phase Unbalance Protection.
• Indication unaffected by meter mounting position.
• No separate auxiliary supply required.
• Latest Technology |
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| Single Phase Preventor : |
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< SPP-1
Salient Features :
• Operates on the principle of sensing negative sequence components of the system.
• Suitable for the protections of motors of any H.P.
• Protection against SINGLE PHASING.
• Protection against REVERSE PHASING.
• Individual trip indication for single phasing reverse phasing and indication for output relay ON.
• No separate auxiliary supply required. |
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< LVM
Salient Features :
• Operates on the principle of sensing negative sequence components of the system.
• Suitable for the protections of motors of any H.P.
• Protection against SINGLE PHASING.
• Protection against REVERSE PHASING.
• Protection against UNBALANCE in supply.
• Variable trip voltage setting for undertake / over voltage protection. Fixed unbalance trip setting at 40 volts.
• Individual trip indication for under voltage, over voltage, single phasing reverse phasing and indication for output relay ON.
• No separate auxiliary supply required. |
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VOLTAGE MONITORING RELAY
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< Salient Features :
• Separate ON & OFF delay selectable by switch.
• Suitable for the protections of motors of any H.P.
• Indication for Timer
• Protection against SINGLE PHASING supply.
• Protection against REVERSE PHASING supply.
• Automatic Tripping for UNBALANCE in supply.
• Automatic Tripping for under / over voltage with variable range setting
• Individual trip indication for under voltage, over voltage, single phasing reverse phasing.
• Indication for Timer.
• No separate auxiliary supply required. |
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| AC Timer |
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| Compressor Guard |
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< Salient Features :
• Having taken care of both voltage and current.
• Compressor guard 1 A/C controls 1 A/C while 2 A/C model controls 2 A/C's
• Protections against overload (Electronic Current sensing type), Under Voltage and Over Voltage.
• Continuously adjustable overload setting to suit different capacities of compressor.
• Manual Reset by means of Power ON / OFF switch for overload tripping and auto.
• Reset for under / over voltage tripping.
• In single A/C model power on delay timer of fixed time delay as per customers specifications to provide sufficient time to equalise the pressure. Timer comes into operation every time the compressor goes OFF, either due to power failure or due to safety protection operated in this unit. Adjustable time delay by means of DTP switches in four steps of seconds / minutes ( optional features on extra cost.)
• In 2 A/C model, power -on delay timer of 2min. 15 sec. to provide sufficient time to equalise the pressure.
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• After every 6 hours the changeover takes place i.e. the running A/C is switched off and the other A/C is switched on. there is a time delay of 1 min. between the switching over of A/C'. The changeover also take place if any A/C is faulty (overload). the running A/C tripped and the overload indication glows. After a time delay of 1 min. the A/C is switched on and the overload then the system can be resettled.
• Battery back-up provided to keep the elapsed running time of one A/C in memory so that whenever power is restored, that particular A/C will run for remaining pre-selected time only and after that the change over will take place.
• Trip time delay of 8 sec. for under / over voltage. Trip time delay of 8 sec. for initial overload and 5 sec. for subsequent overload tripping.
• Separate output for blower fan motor for instant operation.
• Power to this unit is made ON-OFF by means of ON/OFF switch.
• To be directly connected to load no need of extra starter
• Indications for Power On, Timer On, U/V Trip, O/C Trip, AC ON
• Being Electronic, Excellent repeatability and high degree of reliability unaffected by changes in ambient temperature. |
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