PRODUCTS RELATED TO OIL COOLED TRANSFORMERS
 

This series of controllers are designed for protection of large oil cooled power transformers. The controller is suitable for control room as well as for marshalling box application and built for long and trouble free operation under extreme conditions of service associated with transformer equipment.

 
 
     Parametric Comparative Data.   Frequently Asked Questions.
 
  Transformer Protection Relay (OTI & WTI)  
    TR-7550
   
- Single unit for Oil and Winding temperature monitoring.
- Six output contacts (1 NO) for OT Alarm, OT Trip, WT Alarm, WT Trip, WT Coolant 1 & WT Coolant 2.
- Facility to set Hot Spot to Top oil temperature gradient at user’s place.
- Simultaneous display of winding & top oil temperature.
- Bright digital display offers accurate and unambiguous reading.
- Better vibration withstanding capability.
- All solid state design and no moving parts offer extremely high reliability.
- No filled system, hence no problem of puncture, leakage or breakage of capillary, either during installation or during operation.
- Two 4-20mA signals for remote indication of Oil and Winding temperatures.
 
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  Transformer Protection Relay (OTI & WTI)
    TR-7551 / TR-7552
- µC based design.
- Simultaneously display both Oil and Winding temperatures.
- Facilitates setting of required Hot spot to top oil temperature gradient and also the C.T. parameters, at user's place.
- Designed for high ambient temperature up to 70 °C.
- Auto fan exerciser & Anticipatory fan control.
- Die Cast Aluminium weatherproof enclosure (IP-65).
- Records and shows maximum temperature.
- TR-7551 has five (1 C/O) switch contacts for OT Alarm, OT Trip, WT Alarm, WT Trip & Fan.
- TR-7552 has five (1 C/O) switch contacts for OT Alarm, WT Alarm, OT & WT Trip, Fan 1 & Fan 2.
- TR-7551-C / TR-7552-C models available with DAS / SCADA compatibility. (RS-485 computer communication are provided in addition of 4-20mA signals)
   
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   Remote Winding Temperature Indicator    
    RWTI-500M (using 4-20mA signal)  
- µC based design.
- Compatible with our models TR-7550, TR-7551, TR-7552, TR-7551-C and TR-7552-C.
- Accepts 4-20mA from PECON OTI/WTI models or any other 4-20mA signals and displays the termperature.
- Simultaneously displays both oil and winding temperatures.
- Provides repeat isolated current signal of 4-20mA for oil and winding temperatures for SCADA/DAS or for additional indication.
- Desinged for flush mounting on panel in control room.
   
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   Remote Winding Temperature Indicator    
    RWTI-500C (using RS-485 communication)  
- µC based design.
- Compatible with our models TR-7551-C and TR-7552-C.
- Acquires current & maximum temperature data of all channels, status of relays and set-points using RS-485 communication port and diplays the same using two displays.
- Provides repeat isolated current signal of 4-20mA for oil & winding temperature for SCADA/DAS or for additional indication.
- Desinged for flush mounting on panel in control room.
   
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   Remote Winding Temperature Indicator    
    RWTI-500 (using 4-20mA signal)  
- Solid State Design.
- Simultaneously display oil & winding tempratures.
- Digital display offers unambiguous display.
- Indications provided for no signal, under-range and over-range.
- Setting provided for zero and span adjustment.
   
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   Latch Relay     
    LR-01  
LR-01 is designed for use with pressure sensing protective relays on oil cooled transformer. Latch Relay senses momentary contact of pressure relay and provides maintained alarm and trip contacts. LR-01 is suitable for mounting inside the marshalling box or inside a panel in a sub-station.
- Senses momentary contact and maintains Alarm & Trip contacts .
- Manually reset button for unlatching the relays.
- LED indication for latched Alarm & Trip contacts.
- Desinged for various power supply ranges.
   
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   RTD Sensor  
     S-07
- Suitable for all our OTI / WTI.
- 3 wire, PT-100 type sensor (IEC-60751, Class B)
- Temperature range : -50 to 200 C
- Dielectric Strength : 2KVAC rms for 1 min.
   
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