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DESCRIPTION
The Temperature
Relay TR-42 has been designed for continuous monitoring of the
temperature, the cooling fan's control and overheat protection
for resin or air insulated three-phase transformers.
Thermal
detectors PT100 DIN 43760, three of them located inside the
transformer coils and the fourth at the core, detect the
temperature.
The TR-42 relay
is microprocessor-based equipment designed to satisfy all
control requirements and guarantee high reliability.
The TR-42
perform the following functions:
Measurement:
- Coils and core transformer
temperatures, automatically each 5 sec or manually.
- Highest temperature indication
and storage.
Signaling and
programming:
- 7 segment display and led
indication.
- Simplified programming through
frontal push buttons.
- Display and non volatile
storage of: alarm temperature, trip temperature, fan on,
start and stop fan temperature, highest RTD temperature,
baud rate of serial transmission, and assigned relay
address.
Protection:
Programmable setting from 0°
to 220°C, with separate output contact for the following
protection:
- Alarm temperature.
- Start and stop fan
temperature.
- Overheat transformer
disconnection.
- Alarm of TR-42 failure or
PT100 disconnection.
Communication:
Remote digital communication
to a PC or PLC, via RS422 or RS485, allowing:
- Remote adjustment of
protection and relay characteristics.
- Storage of faults and events
for further statistical treatment.
- Self-explanatory software
that requires no additional programming.
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