TECSYSTEM T119 User Manual

6
T119
INTRODUCTION
TECHNICAL SPECIFICATIONS
T119
Absorption 2VA
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Self-diagnostic circuit
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Protection treatment of the electronic part
Option
DATA DISPLAY AND MANAGEMENT
LED indicating alarm channel, trip or fan
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LED indicating FAULT
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2 alarm thresholds
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1 ventilation ON control threshold
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Access to programming through keyboard
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Automatic exit from programming after 1 minute's inactivity
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The T119 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 ALL1 pre-alarm and TRIP signals when the temperature limits detected by the PTCs in the windings are
reached.
The T119 is arranged to control the cooling ventilation of the transformer. The unit controls continuously the efficiency of
the PTC sensors and when one of these is defective, you have immediately a faulty sensor warning.
The FAN relay is energized so long as the temperature T° is higher than the NAT 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
(page 11).
LED SIGNAL:
LED ON: "ON" The device is powered correctly, "OFF" The device is not powered correctly
L1 LED:
"ON" L1 trip threshold exceeded, "OFF" temperature below the L1 trip threshold.
L2 LED:
"ON" L2 trip threshold exceeded, "OFF" temperature below the L2 trip threshold.
FAN LED:
"ON" FAN trip threshold exceeded, "OFF" temperature below the FAN trip threshold.
FAULT LED - L1 LED - L2 LED - FAN LED flashing, see PTC SENSOR FAULT DIAGNOSIS on page 10.

TECSYSTEM T119 Specifications

General

Brand	TECSYSTEM
Model	T119
Category	Control Unit
Language	English