INSTRUCTION MANUAL

T119

1MN0110 REV. 0

operates with ISO9001 certified quality system

TECSYSTEM S.r.l.
20094 Corsico (MI)
Tel.: +39-024581861
Fax: +39-0248600783

http://www.tecsystem.it

R. 1.5 01/08/19

ENGLISH

“Translations of the original instructions”

 INTRODUCTION

First of all we wish to thank you for choosing to use a TECSYSTEM product and recommend you read this instruction
manual carefully: You will understand the use of the equipment and therefore be able to take advantage of all its
functions.

ATTENTION! THIS MANUAL IS VALID AND COMPLETE FOR THE T119 CONTROL UNIT

CONTENTS

PAGE

1) SAFETY REQUIREMENTS ………....................................... 3

2) ACCESSORIES ………………………………….. 4

3) TECHNICAL SPECIFICATIONS ………………………………….. 5

4) INTRODUCTION ………………………………….. 6

5) FRONT ………………………………….. 7

6) INSTALLATION ………………………………….. —

 POWER SUPPLY ………………………………….. 8

7) PROGRAMMING ………………………………….. —

 ALARM RELAY TEST ………………………………….. 9

 LED TEST ………………………………….. —

 ALARM 1 RELAY OPERATION …………………………………. —

 ALARM 2 RELAY OPERATION ………………………………….. —

 FAN RELAY OPERATION

 (VENTILATION)
………………………………….. —

 DELAYED VENTILATION CYCLE (DELAY OFF) ………………………………….. —

 SENSOR DIAGNOSTIC DEVICE ………………………………….. 10

 PTC SENSOR FAULT ………………………………….. —

 PTC SENSOR FAULT DIAGNOSIS ………………………………….. —

 "PTC" TYPE TEMPERATURE SENSORS ………………………………….. —

 PTC TECHNICAL SPECIFICATIONS ………………………………….. 11

 PTC RESISTANCE VALUES ALLOWED FOR

CONNECTION TO T119
………………………………….. —

8) SENSOR / RELAY ELECTRICAL CONNECTIONS ………………………………….. 12

9) WARRANTY CONDITIONS ………………………………….. 13

10) TROUBLESHOOTING ………………………………….. —

11) EQUIPMENT DISPOSAL ………………………………….. —

12) USEFUL CONTACTS ………………………………….. —

2 T119
 SAFETY REQUIREMENTS

ATTENTION :

Read the manual carefully before starting to use the control unit. Keep the instructions for future reference.

Do not open the device, touching any internal components can cause electric shock. Contact with 50 Volts can
be fatal. To reduce the risk of electric shock, do not dismantle the back of the device for any reason. Moreover its
opening would void the warranty.

Before connecting the device to the power supply, make sure that all the connections are correct. Always
disconnect the unit from the supply before any cabling modification.

Any work on the equipment must be entrusted to a qualified engineer.

Failure to comply with these instructions can cause damages, fires or electric shock, and possible serious
injuries!

POWER SUPPLY
The T119 control unit has UNIVERSAL power supply, i.e. it can be supplied by 24 to 240 Vac-Vdc, irrespectively of
polarity in Vdc.
Before using it, make sure the power cable is not damaged, knotted or pinched. Do not tamper with the power cable.
Never disconnect the unit by pulling the cable, avoid touching the pins. Do not carry out any connecting/disconnecting
with wet hands. To disconnect the device, do not use objects such as levers. Immediately disconnect the device if you
smell burning or see any smoke: contact technical service.

LIQUIDS
Do not expose the equipment to splashes or drops, do not position it in places with humidity exceeding 90% and never
touch with wet or humid hands. If any liquid penetrates the control unit, disconnect it immediately and contact technical
service.

CLEANING
Disconnect the power cable before cleaning the control unit, use a dry cloth to dust it, without any solvent or detergents,
and compressed air.

OBJECTS
Never insert any objects into the cracks of the control unit. If this happens, disconnect the control unit and contact an
engineer.

USE RESERVED TO QUALIFIED PERSONNEL

The purchased goods are a sophisticated electronic device that is totally unsuitable to be used by non-qualified
personnel. Any work must be carried out by a specialist engineer.

ACCESSORIES
The use of non-original accessories or spare parts can damage the unit and endanger users' safety. In the event of
faults, contact technical service.

LOCATION
Install the control unit indoors, in a place protected from water splashes and sun rays. Do not place near heat sources
exceeding the parameters stated in this manual. Position on a stable surface, far from any possible vibrations. Position
the unit as far as possible from any intense magnetic fields.

REPAIRS
Do not open the control unit. For any fault, always use qualified personnel. The opening of the control unit and/or the
removal of the series identifying label entails the automatic forfeiture of the warranty. The Warranty seal is applied to all
devices, any attempt to open the unit would break the seal and cause the consequent automatic forfeiture of the
warranty.

TECHNICAL INFORMATION

Mail: ufficiotecnico@tecsystem.it — tel: 02/4581861

T119 3
 ACCESSORIES

The following objects are present inside the box:

Control unit

Start guide and QR code

1 supply terminal 3 poles pitch 5

Code: 2PL0367 - Screws tightening torque 0.5Nm

1 PTC sensor terminal 4 poles pitch 5

Code: 2PL0369 - Screws tightening torque 0.5Nm

1 relay terminal 8 poles pitch 5

Code: 2PL0374 - Screws tightening torque 0.5Nm

1MN0030 REV. 0

ATTENTION: always install the device using the terminals included in the pack.
The use of terminals other than those included with the control unit might cause malfunctions.

4 T119
 T119
TECHNICAL SPECIFICATIONS

POWER SUPPLY

24 -240Vac-dc
Supply rated values
50/60HZ

Maximum ratings 20-270 Vac-dc

●

Vdc with reversible polarities

●

INPUTS

3 series of PTC inputs

●

1 series for L1 (ALARM)

●

1 series for L2 (TRIP)

●

1 series for FAN

●

Connections on removable terminal strips

●

Input channels protected against electromagnetic interference

●

OUTPUTS

2 alarm relay (ALL1 / FAULT AND ALL2) SPDT ●

1 ventilation management relay (FAN) with timed latch (5-10-20-40 min.) delay OFF SPST
●

Output relays with 5A-250Vac-res COSФ=1 contacts.

●

DIMENSIONS

48x96mm– DIN43700-depth 150mm (terminal block included) panel cut-out

44 x 92 mm

TESTS AND PERFORMANCE ●

Assembly in compliance with EC rules

●

Protection from electrical interference EN 61000-4-4

●
Dielectric strength 1500 Vac for a min. between output relays and sensors, relays and power supply,
power supply and sensors ●

Ambient operating temperature from -20°C to + 60°C

●

Humidity 90% non-condensing ●

Self-extinguishing PPO UL94VO

●

T119 5
 T119
TECHNICAL SPECIFICATIONS

Absorption 2VA
●

Self-diagnostic circuit
●

Protection treatment of the electronic part

Option

DATA DISPLAY AND MANAGEMENT

LED indicating alarm channel, trip or fan

●

LED indicating FAULT

●

2 alarm thresholds
●

1 ventilation ON control threshold

●

Access to programming through keyboard

●

Automatic exit from programming after 1 minute's inactivity

●

INTRODUCTION

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 INDICATION:

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.

6 T119
 FRONT
1

1MN0110 REV. 0

1) Control unit series 5) FAN (ventilation) LED (yellow)

2) Power ON LED (green) 6) FAULT LED (red)

3) ALL1 (alarm) LED (red) 7) PRG (programming) LED (red)

4) ALL2 (trip) LED (red) 8) TEST button

MOUNTING 1MN0111 REV. 0

Make a 92 x 44mm hole (tolerance +0.8mm) in the

panel metal sheet.

1 2 3 4 1MN0064 REV. 0
1) Control unit 3) Fixing screw

2) Fixing block 4) Crosshead screwdriver #1X100mm

T119 7
POWER SUPPLY

The T119 control unit has UNIVERSAL power supply, i.e. it can be supplied by 24 to 240 Vac-Vdc, 50/60Hz irrespectively of
polarity in Vdc (terminals 40-42).
This is obtained thanks to the use of a tested power supply unit, newly designed and manufactured, that frees installers
from worrying about the correct Vac and Vdc supply.

The ground must always be connected to terminal 41.

When the unit is supplied directly by the secondary of the transformer to protect, it can be burnt out by strong
overvoltages.
This happens if the main switch is closed and the transformer has no load (blank test).
The above-mentioned problems are much more evident when the 220 Vac voltage is taken directly from the transformer
secondary bars and there is a fixed capacitor battery to phase the transformer itself.

To protect the control unit from line overvoltages, we suggest using the PT-73-220 electronic discharger, designed by
TECSYSTEM S.r.l. for this specific purpose. As an alternative we suggest using 110 Vac or, even better, 110 Vdc supply
voltages.

If an existing control unit must be replaced with a new one, to guarantee its correct and safe operation, the
sensor/relay/supply connecting terminals must be replaced with the new terminals supplied.

PROGRAMMING
VENTILATION CYCLE PROGRAMMING

STEP ACTION EFFECT

1 Turn on the unit the green LED lights up

2 Push TEST twice in sequence the PRG LED flashes

Push TEST within 5" until the PRG LED is steady

3 ON
the PRG LED is ON continuously

the red/yellow LED switches from

4 Push TEST within 5" to select the desired FAN time
T1-T2-T3-T4 (FAN time 5’-10’-20’-40’)

Stop pressing TEST when the LED is on the Tx

5 corresponding to the desired time. Wait for all the
LEDs to go OFF.

6 End of programming all the LEDs are OFF

7 Turn the unit OFF and then back ON

To choose the FAN time (point 4):

Press TEST once to select 5' (T1 ON)

Press TEST twice to select 10' (T2 ON)
Press TEST three times to select 20' (T3 ON)
Press TEST four times to select 40' (T4 ON)
If no ventilation cycle is required, press TEST 5 times (all LEDs are OFF). The control unit is programmed only for
ALL1 and All2 (alarm and tripping)

8 T119
ALARM RELAY TEST

STEP ACTION EFFECT

the T1,2,3,4 LEDs light up in

1 push TEST three times in sequence
sequence

Within 5” push TEST without releasing it until the

2 LEDs light up all together LEDs T1,2,3,4 flash all together

after 5” the FAN relay lights up, followed by the

FAN-ALL1-ALL2 LEDs and relays
3 ALL1 and ALL2 relays
are ON

4 END OF THE TEST CYCLE all the red LEDs go OFF

LED TEST
We suggest carrying out the control unit LED test regularly.
For this operation, press the TEST key briefly; all the LEDs light up for 2 seconds.
If one of the LEDs does not work, please return the control unit to TECSYSTEM for repair.
ALARM 1 RELAY OPERATION
The ALL1 (L1) relay operates normally when the unit is powered, therefore the N.O. contact is closed. In case of an alarm
on the ALL1 (L1) PTC or a fault in the control unit itself, the relay gets de-energised with consequent closing of the N.C.
contact.
The ALL1 (L1) relay also has the same function as the PTC sensor FAULT. If this relay is triggered when the PTC sensor
FAULT LED is FLASHING, it means that there is an error in the reading of a PTC sensor. It is possible to find it, thanks to
a second LED flashing which corresponds to the fault channel.
ALARM 2 RELAY OPERATION
The ALL2 (L2) relay is normally de-energized and energizes when there is an alarm on the L2 PTC.
FAN RELAY OPERATION (VENTILATION)
During programming, it is possible to set the cooling time or to exclude the FAN option. If the FAN is excluded, the relay
doesn’t energize and for this reason it is possible not to install the corresponding PTC.
If the FAN is set up, the relay activates when the relative PTC sends the first signal and the FAN LED is steady ON: the
relay is active for as long as the PTC senses the temperature is normal, the T119 unit keeps the relay ON for the time set
during programming and the FAN LED flashes.

When the time

DELAYED expires andCYCLE
VENTILATION if the temperature is still normal, the relay de-energizes and the LED switches OFF.
(DELAY OFF)

STEP ACTION EFFECT

1 the FAN PTC sensor is ON the FAN relay is ON and the yellow LED is ligt

the temperature goes below the PTC the FAN relay remains ON for the set time and
2
value the yellow LED flashes

the temperature raises again above the

3 the LED is ON all the time
PTC set threshold

IMPORTANT WARNING

Before carrying out the isolation test of the electrical panel the control unit is installed on, disconnect it together
with the sensors from the power supply, to prevent it from being seriously damaged.

T119 9
SENSOR DIAGNOSTIC DEVICE

This new function allows enabling or disabling the PTC diagnostic device (Foc and Fcc):

Diagnostics disabling method:

power the instrument keeping the TEST button pressed until the FAULT LED comes ON

With the diagnostics disabled, the FAULT red LED will be ON all the time.

Diagnostics re-enabling method

Power the instrument keeping the TEST button pressed until all LEDs go OFF. With the diagnostics enabled, the FAULT
red LED will be OFF and flash in case of sensor faults.

The T119 control units will be supplied with the sensor diagnostics ENABLED.

PTC SENSOR FAULT

ACTION EFFECT

the FLT red LED and the corresponding LED

one of the PTCs is short-circuited
(ALL1-ALL2-FAN) are flashing

replace or repair the PTC the LEDs go OFF

PTC SENSOR FAULT DIAGNOSIS

If one of the PTCs is short-circuited or interrupted, you have the following indications:

ALARM PTC ALL1(L1) the FAULT + ALL1 LED is flashing

TRIP PTC ALL2(L2) the FAULT + ALL2 LED is flashing
FAN PTC FAN the FAULT +FAN LED is flashing

ATTENTION

If the right model of PTC is not connected to the T119 control unit, the LEDs flash.
The PTC temperature is nat + T = 1300 ohm.

"PTC" TYPE TEMPERATURE SENSORS

The PTCs can be compared to bimetallic thermostats where the contact opens and closes at the approximate temperature,
defined as their operating characteristic (NAT=operating temperature).

The sensor is calibrated for one temperature only that can vary from 60°C to 190°C, in 10°C (In relation to the acquired
probe), in 10°C steps (60-70-80-90-100-110-120-130-140-145-150-155-160-170-180-190).

The PTCs are electronic thermometric sensors made with a chemical mixture that vary their electrical resistance according
to the recorded temperature.

There is a NAT (operating temperature) for the PTCs as well as for the bimetallic thermostats.
The PTCs do not allow precision adjustments since the characteristic resistance values are fixed at –5°C and +5°K of
NAT.

The PTC characteristic resistance values are set by the DIN 44081 and 44082 standards.

Since the PTC resistance curve is very rapid, in the section between NAT -5°C andNAT +5°K, it is quite difficult to make
adjustments in a temperature span of less than +/- 5°K.

10 T119
 Table 1

PTC TECHNICAL SPECIFICATIONS

TEMPERATURE RESISTANCE  MEASURED VDC VOLTAGE

-20°C to TREF -20K 20 – 250 Ω ≤2,5V

Resistance TREF -5K ≤550 Ω ≤2,5V
Resistance TREF +5K ≥1330Ω ≤2,5V
Resistance TREF +15K ≥4000Ω ≤7,5V pulsed
Electric stiffness 2500 Vac

Maximum operating voltage 30

PTC RESISTANCE VALUES ALLOWED FOR CONNECTION TO T119

The resistance value shown in table 1 refers to a single or a multiple serie of PTCs.

The device operates correctly if the stated resistance values are complied with. If the PTCs, either single or multiple in
series, have resistance values other than the stated, please notify TECSYSTEM Srl.

FUNCTION RESISTANCE W

NO ALARM HIGHER THAN 50 Ω

Temperature of the machine below the alarm
thresholds

ALARM HIGHER THAN 1800 Ω

FAN-ALL-TRIP set alarm thresholds reached

FOC HIGHER THAN 10 KΩ

Sensor diagnostics interrupted

FCC LOWER THAN 30 Ω

Sensor diagnostics short-circuited

T119 11
 SENSOR / RELAY ELECTRICAL CONNECTIONS

1MN0110 REV. 0

1) Universal unit supply 24-240 Vac-dc 50/60Hz 3) L1 - L2 - FAN PTC sensor lines

2) Relays (L1/FAULT-L2-FAN)

PTC SENSORS RELAYS

L1 L2 FAN
L1 L2 FAN COM

CH1

CH2

CH3 STOP
SYSTEM

1 2 3 4

ALARM / FAULT
AUDIO AND
VISUAL INDICATION

1MN0095 REV. 0

The L1/ FAULT relay operates normally when the unit is powered, therefore contact 5-7 is closed. The above picture
shows the state of the relays in non-alarm condition.

12 T119
 WARRANTY CONDITIONS

The Product purchased is covered by the manufacturer's or seller's warranty at the terms and conditions set forth in the
"Tecsystem s.r.l's General Conditions of Sale", available at www.tecsystem.it, and / or in the purchase agreement.
The warranty is considered valid only when the product is damaged by causes attributable to TECSYSTEM srl, such as
manufacturing or components defects.
The warranty is invalid if the Product proves to have been tampered with / modified or incorrectly connected and causing
voltages outside the set limits and does not comply with the technical data for use and assembly, as described in this
instruction manual.
The warranty is always ex Corsico as stated in the "General Conditions of Sale".

Tecsystem Srl is not responsible for damages caused by the monitoring unit due to PTC sensors which do not
have the resistance features DIN44081 and 44082 standards.
N.B. To verify the correct operation of the monitoring unit in all its functions, we suggest you use the SIM-PTC simulator.

TROUBLESHOOTING CAUSES AND SOLUTIONS

The control unit does not switch on, the Switch the unit off and check that: the connecting wires are
corresponding LED is OFF. tightened and there are no obvious burns on the connectors.

Check the continuity and connection of the relative PTC line.

One of the two PTC lines is in FAULT alarm Replace the faulty sensor, see PTC sensor fault diagnosis on page
10.

EQUIPMENT DISPOSAL

European directive 2012/19/EU (WEEE) has been approved to reduce electrical and electronic waste and promote the
recycling and reuse of the materials and components of said equipment, cutting down on the disposal of the residues
and harmful components of electrical and electronic materials.

All the electrical and electronic equipment supplied after 13 August 2005 is marked with this symbol, pursuant to
European directive 2012/19/EU on electrical and electronic waste (WEEE). Any electrical or electronic
equipment marked with this symbol must be disposed of separately from normal domestic waste.

Returning used electrical devices: contact TECSYSTEM or your TECSYSTEM agent for information on the correct
disposal of the devices.

TECSYSTEM is aware of the impact its products have on the environment and asks its customers active support in the
correct and environmentally-friendly disposal of its devices.

USEFUL CONTACTS

TECHNICAL INFORMATION : ufficiotecnico@tecsystem.it

COMMERCIAL INFORMATION : info@tecsystem.it

T119 13