Introduction - TECSYSTEM T119 DIN Instruction Manual

TECHNICAL SPECIFICATIONS
Absorption 2 VA
Self-diagnostic circuit
Protection treatment of the electronic part
DISPLAY AND DATA MANAGEMENT
LED indicating alarm channel, trip or fan
LED indicating FAULT
2 alarm thresholds
1 ventilation control ON threshold
Access to programming through keyboard
Automatic exit from programming after 1 minute's inactivity

INTRODUCTION

The T119 DIN is the most advanced unit on the market as regards temperature monitoring units for MV cast resin
transformers which utilize PTC sensors.
The unit gives the L1 pre-alarm and L2 alarm-trip signals when the temperature limits sensed by the PTCs in the coils are
reached.
The T119 DIN is set to control the cooling ventilation of the transformer. The T119 DIN continuously monitors the efficiency
of the PTC sensors and when one of these fails, an immediate alarm signal of faulty sensor is sent.
The FAN relay is energized so long as the temperature T° is higher than the δNAT value; when T° gets below this value,
the relay is still energized for the set ventilation time (5-10-20-40') (DELAY OFF function).
As the PTCs currently produced by the various European manufacturers have different specifications, Tecsystem Srl is not
responsible for the control system malfunctioning due to PTCs with resistance values other than those indicated in table 1.
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T119DIN
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