TR 7576 Six channel temperature scanner with 4 to 20 mA remote output Transformer Protection Relay

Transformer protection relay for cast resin/dry type transformer


Type: Temperature Scanner

Sub Type:

Weight: 4.00 KG

Tax: 18.00 %

In Stock

Delivery in 2-4 days in major cities and 3-7 days in remote area.
Worldwide delivery available.

100% Secure Payments, 7 Days Easy Return Policy.

Item Specifications :

Condition : A brand new unused, undamaged item that is fully operational and functions as intended.

Warranty : 1 Year Manufacturer.

Warranty Service : Repair or Replacement.


Package Contain : 

1 Temperature Scanner 

1 Test Report

1 user manual with technical details.


Product Descriptions :

Six channel temperature scanner.
Temperature indication range : – 50 to 250 °C.
Four relay outputs for Fault, Fan, High (Alarm) & Very High (Trip).
Independent set of setpoints for 4th Channel.Fan exerciser function.
4-20mA output for remote temperature indication /
Aux. Supply : 85-270 VAC/DC (Optionally 20-50 VAC/DC).


Standard Features:

Single scanner unit to measure six temperatures. Four output relays for Alarm (High), Trip (V.High), Fan & Fault ( to warn against sensor open or short circuit condition of sensor connection).

Auto fan exerciser Memorizes max. temperature even after power fail conditions.

TR-7576, comes with Analog output (4-20mA) for remote indication, 

The model TR-7576 is designed for safe operation of medium voltage cast resin / dry type transformer.

It is suitable for control room as well as marshalling box installations and is built for long and trouble-free operation under extreme conditions of service associated with transformer.

Three numbers of user settable set-points can be used to control the cooling fan, to warn the user of high temperature and to shut down the transformer in case of excessive heating.

Six nos. of Pt-100 RTD sensors allow the user to monitor the temperatures of six windings located suitably in transformer.

TR-7576 has one analog output signal (4-20mA). This can be configured to represent the temperature of any of the six channels or the temperature of the hottest channel.


Technical specifications :

Inputs : 6 nos. of  RTD sensors (Pt-100, IEC-60751)

No. of Set-points : Three (Alarm, Trip & Fan On.) Temperature indication range:        -20  to 250 0C

Set point range : 20 to 220 0C

Accuracy 1 0C        

Dead Band (relay differential) : Fan & Trip : 8 0C,  Alarm : 5 0C (Factory set)

Display Speed : 4 seconds (Factory set)

Display :1 Seven Segment 1/2" displays for displaying channel number 3 Seven Segment 1/2" displays for displaying Temperature Mechanical     

Overall Dimensions : 215 (H) x 265 (W) x 130 (D) mm   

Mounting : Wall mounting by 3 nos. M6 Screws         

Weight :3.5 kg approx. (unpacked)

Enclosure: M.S. Sheet Box, powder coated, with acrylic viewing window (IP-52)

Electrical Supply Voltage : 90 - 270 VAC/DC (Optionally 20 - 50 VAC/DC)

Outputs : Four relay contacts (N/O contact ) - Fault, Fan, Alarm & Trip  One analog 4-20mA output in TR-7576 (corresponding to 0 to 200 0C  max. load 300 ohms, linearity 0.5% w.r.t. local indication)

Contact Racting :  For resistive load, 5A @ 230VAC & 0.5A @ 125VDC For inductive load, 5A @ 230VAC (cosΦ = 0.4) & 0.3A @ 125VDC (L/R=7msec). Optionally, 0.3A @ 230VAC & 0.3A @ 220VDC.     

Relay operations : Fault : Will energize after few seconds of power-on and de-energinze on detecting fault condition. Fault relay will remain on in normal conditions. Fan : Will energize if any channel's tmeperature reaches fan set point . This relay will also turn on as per fan exerciser set timings, if this  Fnction is enabled. Alarm  : Will energize if any channel's temperatrure reaches alarm set point.  Trip : Will energize if any channel's temperature reaches trip set point.     

Terminals : Screwed Caged suitable for 2.5 sq. mm solid conductors.

Insulation : Insulation resistance shall be 100 Mohm or more when 500 VDC is applied between each terminal shorted together and earth. Controller will withstand 2 KV rms at 50/60 Hz. for 1 min., applied between all relay & supply terminals shorted together & earth.

Power consumption : Max. 15VA     

Environmental Operating conditions

 Amb. Temp : -20  0C to 70 0C,        

R.H. :  95% Max non-condensing.    

Storage Temp. : -20 0C to 85 0C    

Test conditions:  Amb. Temp.  : 27 0C    5 0C,                

R.H.  :  20 - 80% non-condensing.        

Vibration :  10-150 Hz, 0.004" displacement



Our offered controller is manufactured by our adroit professionals using quality tested components and modern technology. we kindly request buyers to communicate with us if there are any issue. we will help to solve all of your issue. Every care is taken for packing so that the item reaches to the buyer safely and undamaged.