TECSYSTEM NT133-3 Instruction Manual
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TECSYSTEM NT133-3 Instruction Manual

TECSYSTEM NT133-3 Instruction Manual

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INSTRUCTION MANUAL
NT133-3
1MN0150 REV. 1
operates with ISO9001 certified quality system
TECSYSTEM S.r.l.
20094 Corsico (MI)
Tel.: +39-024581861
Fax: +39-0248600783
http://www.tecsystem.it
R. 1.0 05/12/23
ENGLISH
"Translations of the original instructions"

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  • Page 1 INSTRUCTION MANUAL NT133-3 1MN0150 REV. 1 operates with ISO9001 certified quality system TECSYSTEM S.r.l. 20094 Corsico (MI) Tel.: +39-024581861 Fax: +39-0248600783 http://www.tecsystem.it R. 1.0 05/12/23 ENGLISH “Translations of the original instructions”...

  • Page 2: Table Of Contents

    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.
  • Page 3 ………………………………….. — POLLING FREQUENCY  …………………………………... MODBUS MAPPING  ………………………………….. CRC CALCULATION  ………………………………….. — PARAMETER DESCRIPTION  ………………………………….. — ALGORITHM 13) WARRANTY CONDITIONS ………………………………….. — 14) TROUBLESHOOTING ………………………………….. 15) EQUIPMENT DISPOSAL ………………………………….. — 16) USEFUL CONTACTS ………………………………….. — NT133-3...

  • Page 4: Safety Requirements

    POWER SUPPLY The NT133-3 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.

  • Page 5: Accessories

    1 terminal 3 poles pitch 3,81 output RS485 Code: 2PL0366 - Screws tightening torque 0.25Nm 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. NT133-3...

  • Page 6: Technical Specifications

    TECHNICAL SPECIFICATIONS NT133-3 POWER SUPPLY Supply rated values 24-240 Vac-Vcc 50/60HZ Maximum and minimum supply values 20-270 Vac-Vcc 50/60Hz Vdc with reversible polarities ● INPUTS 2 inputs RTD Pt100 (IEC 751) - 3 wires ● 3 inputs CT1,CT2,CT3 regulation from 0.8 to 5.2 A ●...
  • Page 7 TECHNICAL SPECIFICATIONS NT133-3 Resolution 1°C ● Accuracy: temperature “Oil” ± 1% full scale value ±1 digit ● temperature “Winding” ± 1% full scale value ±1 digit Working temperature from –20 °C to +60C ● Humidity 90% no condensing ● PPO UL 94V0 self-extinguishing housing ●...

  • Page 8: Preliminary Check

    One of the most reliable method to assess the winding temperature lies in measuring the oil temperature in the upper part of the transformer, adding a value given by the ”thermal image”. Thermal image is digitally composed by NT133-3 taking into consideration the current which passes through the windings, the time constant and the temperature gradient.

  • Page 9: Front Panel

    Temperature display Channel display SCAN led (green) TRIP led (red) MAN led (yellow) Enter / Reset key MAX led (red) ALARM led (red) Control unit series Programming / Set key Test key FAULT led (red) 10) Mode key Fixing block NT133-3...

  • Page 10: Working Keys

    ENT/RESET you return to control mode after that all the LED’s and display turned on for 2 seconds. If this key is not pressed within 60 seconds, you leave the programming mode without back-up, restoring data previously set. NT133-3...

  • Page 11: Mounting

    Fix the unit securely with the blocks supplied. 1MN0144 REV. 0 Control unit Fixing screw Fixing block Cross-head screwdriver # 1X100mm Note: Do not install the device in too hot or humid places; low frequency and high intensity vibration can cause damage to the mechanical structure. NT133-3...

  • Page 12: Nt133-3 Mounting

    PT100 3 wires temperature sensors are inserted in a stainless-steel pipe with a nipple for well immersion and DIN head. The well fixing is generally 1/2” GAS or 3/4” GAS. If NT133-3 is connected with a double sensor PT100 3 wires, the first nPt programming step must be set to 2.

  • Page 13: Electrical Connections

    FAULT 63-64 NC: ALARM FAULT OR POWER OFF POWER SUPPLY The NT133-3 control unit has UNIVERSAL power supply, i.e. it can be supplied by 24 to 240 Vac-Vdc, 50/60 Hz 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.

  • Page 14: Sensors Rtd Connections

    For the correct working it is required the connection of just one PT100 sensor even if NT133-3 allows to use up to two sensors by redundancy; using two sensors in the same time NT133-3 chooses RTD1 as default and switches on RTD2 in case of failure.

  • Page 15: Unit Working

    UNIT WORKING LEDS INDICATION NT133-3 has nine LED’s for the following indications: Fixed on LED Blinking LED SCAN mode: SCAN Display alternately shows Oil - L1 - L2 - L3 every 2 seconds MANUAL mode: Display shows Oil - L1 - L2 - L3 selecting it with keys ▲...

  • Page 16: Standard Mode (Scan Mode)

    Before reporting any alarm or tripping, NT133-3 verifies the real alarm condition for a fixed period of 5 seconds. The monitoring unit is designed to work in environment with temperatures up to 60 °C.

  • Page 17: Temperature Diagnostics

    TEST LED MODE NT133-3 is equipped with a mode which allows to verify LED and display working. Pressing TEST key once or for less than 5 seconds, all the LED’s and the display turn on for approximately 3 seconds, in order to verify their working.

  • Page 18: Programming

    PROGRAMMING NT133-3 allows the User to modify the set default thresholds and to check the values suggested by the transformer   manufacturer for a correct working. In the programming mode, by the keys you increase/decrease stored values. If during this phase ENT/RESET key is pressed, the monitoring unit saves the modified parameters and returns control mode using the just modified parameters.
  • Page 19 Fan starting up for 5 minutes fan cyclic test function expressed in every “h” hours. hours is displayed Press the arrows 0-199 000: inhibited function to change the value (disabled func- “H”: number of hours. from 1 to 199°C tion) NT133-3...
  • Page 20 If ENTER is not pressed within 60 seconds, the previous programming is restored. NOTE 2 If the thresholds have not been correctly programmed, ERR indication is displayed. Press PRG to start over the programming. NOTE 3 By pressing MODE key you return to the previoius step. NT133-3...

  • Page 21: Rs485 Modbus Rtu Output

    DATA TRANSMISSION ON MODBUS RS485 RS485 Modbus RTU interface of NT133-3 allows to read the data shown in the table at page 24-25 and to write the ones shown in the table at page 22. Monitoring unit is always in slave mode.

  • Page 22: Function Code

    CT2: from 0.8 (8) to 5.2 (52) RAMETERS CT3: from 0.8 (8) to 5.2 (52) TC: from 1 to 60 NUM PT100: 1 or 2 NUM CT: from 1 to 3 NUMBER OF FREE: not stored INPUTS FREE: not stored FREE: not stored NT133-3...

  • Page 23: Programming Remote Note

     PUMP-ON thresholds must be higher than PUMP-OFF thresholds In case you try to load these thresholds in a wrong way, NT133-3 monitoring unit won’t proceed with the programming and data storage; therefore in the coming readings you will read the data relevant to the previous programming.

  • Page 24: Modbus Mapping

    L2 pump-on threshold PUMP ON L3 L3 pump-on threshold PUMP OFF PT100-1 PT100-1 pump-off threshold PUMP OFF PT100-2 PT100-2 pump-off threshold PUMP OFF L1 L1 pump-off threshold PUMP OFF L2 L2 pump-off threshold PUMP OFF L3 L3 pump-off threshold Transformer gradient NT133-3...
  • Page 25 NOTE 3: ALARM HISTORICAL SITUATION REGISTER Alarm historical situation register contains information relevant to the alarm intervention storage of the channel that is referred. TRIP ALARM PUMP — Every bit represents a flag that is active when its value is 1. NT133-3...

  • Page 26: Crc Calculation

    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.

  • Page 27: Troubleshooting

    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.

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