Engg. Manual TR-7570

Power Electronics & Control145/2, G. I .D.C. Estate , Naroda,

Ahmedabad - India : 382 330Tel: +91(79)2281 3432, 2281 7892

Fax: +91(79) 2282 1397emai l : pecon@vsnl .com

P E C O NR

electronics

TRANSFORMER PROTECTION RELAY

(WINDING TEMPERATURE SCANNER)

ENGINEERING MANUAL

FOR

TR-7570

Do

c. N

o.:

03052603

TABLE OF CONTENTS

ON RECEIPT ....................................................................................................... 1

INITIAL CHECKING ............................................................................................. 1

PUSH BUTTON OPERATIONS ............................................................................ 2

OPERATOR INTERFACE..................................................................................... 3

PROGRAMMING OF THE CONTROLLER ............................................................ 4 SET MODE............................................................................................................ 4

FUNCTION MODE ............................................................................................... 5

INSTALLATION ................................................................................................... 7

OPERATION........................................................................................................ 8 Normal Operation ................................................................................................. 8 Standby Mode ...................................................................................................... 8 Temperature and Channel Display ....................................................................... 8 LED Indicators ..................................................................................................... 8 Fault Conditions................................................................................................... 9 Display Messages ................................................................................................ 9 Relay operation .................................................................................................... 9

DEFAULT SETTINGS & SETTING LIMITS ......................................................... 10

ENGINEERING SPECIFICATIONS ..................................................................... 11 Technical Specifications .................................................................................... 11 Mechanical ......................................................................................................... 11 Electrical ............................................................................................................ 11 Environmental .................................................................................................... 11

LIST OF ATTACHMENTS Annexure - 1: Front Layout Details Fig. 1a - to -1f Operator’s Interface Fig. 2a - to -2f Programming mode Fig. 3 Relay Operation Annexure - 2: Mechanical Dimensions Annexure – 3: Connection diagram for TR-7570 Drawing for RTD sensor S-02

ENGINEERING MANUAL FOR TR-7570*

ON RECEIPT Ensure that the packing contains:

Controller TR-7570 1 No. Sensor (RTD Pt-100) with approx. 1 meter lead length 3 No. Mounting kit (Rubber mounting and screws) 1 Set Engineering Manual 1 No.

Check for apparent damage that might have been caused during transit. In such an event, report back to us.

INITIAL CHECKING Please go through this manual carefully. Factory Default Settings are listed on page 10 and

Engineering Specifications are given on page 11. TR-7570 is fully set & programmed to meet generally required demands for protection of your transformer.

For making connections, open the front cover of the controller by unscrewing two screws provided at right hand side top and bottom corners on face of the controller.

Make either 240VAC or 110 VAC supply available. If available supply is 240VAC, connect it at terminal 28 & 30 and if it is 110VAC, connect it at terminal 29 & 30.

Protective earth is to be connected at earthing stud provided externally on the enclosure. RTD sensors (S-02) are to be connected at terminals 1 to 12. First RTD is to be connected as

follows: White lead at terminal 1 Red leads at terminals 2 & 3. Connect other two sensors in similar sequence on terminals marked for RTD 2 & 3. Leave

RTD – 4 connections open. Switch on the power to the controller. Sign on message t r. 7 5 7 0 will flash across the front

display. In case, in an unlikely event, if the display shows scrolling characters instead of the above

message, please switch off the power supply and switch it on after a few seconds. The display marked channel will start showing sequentially 1,2,3 corresponding to selection of

RTDs 1,2,3 and the display marked temperature will show their respective temperature in oC. As the signal coming from RTD is filtered using normalizing technique, the temperature display will rise slowly and initially may take around a minute to stabilize.

If any of the RTD connections are not proper or if the RTD is defective, Fault LED will light up & the temperature display for that particular channel will show one of the following messages: o P n. (OPEN) if any one or more of the leads are open circuited or if the RTD itself is open circuited. U d r. (UNDER-RANGE) if the temperature is below -50oC or the RTD leads are wrongly connected or the RTD sensor is short-circuited.

If necessary, make proper connections before proceeding further.

* This manual is effective for supplies made Sept, 2003 onwards.

Power Electronics & Control

PUSH BUTTON OPERATIONS

To perform the necessary operations and programming, six pushbuttons (keys) are provided. Some of the keys are dual function keys and are used to perform different tasks in different modes. For actual operation and programming of the controller, graphical / pictorial diagrams and flowcharts are provided which clearly indicate the functions of these keys. Generally, these keys can be defined as follows,

1) Func. / Esc. key: This key (Func.) takes the controller to the function mode and (Esc) out of the function mode or set mode.

2) Set / Reset key: This key (Set) takes the controller to the set mode. When in maximum or current maximum mode, this key (Reset) is used to reset the recorded maximum temperature readings. Reset key is duplicated on front cover.

3) Increment key (Up): a) When in normal mode, this key will take display to the next channel. b) In Function or in Set mode during programming, this key will increment the value.

i) When pressed and released within 1 sec., it increments the value by 1. ii) When kept pressed for more than 3 seconds, it increments the value at faster

rate, till the key is released. 4) Auto / Manual key:

a) In normal mode or maximum mode, this key toggles the controller between Auto or Manual (Hold) mode.

b) In programming mode, this key is ineffective. 5) Max / Enter Key:

a) In normal mode, this key (Max) is used to show recorded maximum or current maximum temperatures. Max key is duplicated on front cover as Max Temp. key.

b) In function mode, set mode or in programming mode, this key (Enter) is used for acknowledging the operation or entering the data.

6) Decrement key (Dn): a) When in normal mode, this key will take display to the previous channel. b) In Function or in Set mode during programming, this key will decrement the value.

i) When pressed and released within 1 sec., it decrements the value by 1. ii) When kept pressed for more than 3 seconds, it decrements the value at faster

rate, till the key is released.

Note: Max (maximum) and Reset (Reset) keys are duplicated on the front cover for ease and convenience of the operator, during normal operation of the controller.

Page 3

OPERATOR INTERFACE

The operator can check the following parameters and perform limited operations on the controller.

a. Change between auto and manual mode. Refer Fig. 1.a. Explanation: In Auto mode, the controller will display the current temperatures of all the channels sequentially. In Manual mode the display is locked to show the current temperature of the selected channel. The channel can be changed using Up / Dn keys.

b. Change to maximum and current maximum modes and reset the recorded maximum temperatures for fresh readings. Refer Fig. 1.b. Explanation: In Maximum mode, the display shows the recorded maximum temperature of each channel. In this mode, controller can be taken to Auto / Manual mode also. In Current Maximum mode, the display is dynamically held to the channel having highest temperature. Therefore, the controller will necessarily be in Auto mode and will display the highest temperature on the transformer. Recorded maximum values can be erased from the memory for fresh recording of maximum temperature, by keeping Rst pushbutton pressed for more than 3 Seconds. This is possible only when the controller is in maximum or current maximum mode.

c. Check Fan, High & Very high relay operation set values and their operating differentials using Set mode. Refer Fig. 1.c Operator Interface (Set mode) and Fig. 3 Relay operation.

d. Check, the following parameters, using function mode. Refer Fig. 1.d - to - 1.f Operator interface (Function mode). - display speed, - time delays for relay operation (also refer Fig. 3 Relay operation), - relay grouping, - remote output selection, - Maximum temperature recording parameters. Explanations: - Display speed is the time in seconds for which one particular channel / winding temperature is displayed. However, the controller is scanning all the channels / windings and performing its assigned tasks in background at much higher speed. - Time delay for relay operation is the time in seconds for which the controller verifies the conditions for respective relay operation. - Relay grouping relates the relay operations with channels. This check indicates which relays (Fan, High & Very high) operate with each individual channel. - Remote output selection: The output for remote temperature monitoring is available for any one channel or for the channel having the highest temperature. This check shows this setting. - Maximum temperature recording parameters: Record Maximum above - This check shows the temperature above which the controller will start memorizing the maximum temperature of the winding. Record Maximum in steps of - This is the resolution of the reading being recorded after the maximum temperature rises more than the above set parameter.


PROGRAMMING OF THE CONTROLLER

TR-7570 is fully pre-programmed for safe operation of the transformer and to protect it from excessive heating. However, fan operating set point and high & very high levels can be changed to suit specific design requirement. These parameters can be changed and set to required levels using the SET mode. Generally no other settings need alterations. Although, TR-7570 offers complete programmability and parameters such as relay grouping, time delays for relay operation, add/delete channels etc. etc. can also be changed.

TR-7570 can be taken to programming mode by putting the “Prog” switch into “ON” position. This switch is provided between terminals 24 and 25. When in “OFF” position, it allows the operator to view the set points but does not allow him to make any changes. For changing the parameters, this switch is to be put in “ON” position. In this mode,

1) P r G message is displayed 2) Fault LED blinks 3) Fault relay turns on and off at approx. 5 Seconds interval.

Caution: During this mode, the controller does not have control over the relays. Therefore one must ensure to switch the controller back to normal mode after doing necessary programming.

Following parameters can be changed using SET mode. • h - High relay (set point and differential) • H - Very High relay (set point and differential) • F - Fan relay (set point and differential) Following parameters can be changed using FUNCTION mode. • Display Speed (Function 1) • Time delays for relay operation (Function 2) • Relay Grouping (Function 3) • Add/Delete Channels (Function 4) • Remote Output Channel (Function 5) • Put Maximum recording settings (Function 7) • Calibration of channels (Function 8) • Restore factory calibration values (Function 9)

SET MODE Refer graphical flow chart, Fig. 2.a Programming (Set mode) to execute this mode. • h - High relay

o Set point (xxx oC) o Differential (Hysteresis / Dead band) (d.xx oC.)

• H - Very High relay o Set point (xxx oC) o Differential (Hysteresis / Dead band) (d.xx oC.)

• F - Fan relay o Set point (xxx oC) o Differential (Hysteresis / Dead band) (d.xx oC.)

Note: 1) Range of settings is listed on page 10 in section Default settings and Setting Ranges 2) An interlock has been provided which inhibits to set set-point less then the differential value. Similarly the differential value cannot be set more than the set-point value.

Page 5

FUNCTION MODE

Following functions are used to set necessary parameters

F 1: Change Display Speed. This function allows changing the period of time for which the controller displays winding

temperature (actual or maximum) of each channel in auto mode or in maximum mode.

F 2: Change time delays for High, Very High & Fan This function allows changing the time delays in operation of relays for High, V. High and

Fan. This delay is the time the controller reconfirms the conditions before energizing the corresponding relays.

F 3: Relay Grouping The controller offers the flexibility of programming the relay operation with selected channels.

In simple words, the controller can be programmed to give fan control, alarm, and trip signal from any one or more channels. Alarm and trip signals refer to High and V. high setpoints respectively. Note: Only Fan, High and Very High relays can be assigned to any of the channels. Fault relay is completely independent and operates as per the conditions described in section “Fault Conditions” on page 9.

F 4: Add / Delete Channels This function allows adding or deleting a channel from control action. Note that, all channels

cannot be deleted and “E r r” message is displayed in case, attempt is made to select the last undeleted channel.

F 5: Remote Output Channel / Max. Ch. The controller provides signal for remote indication of temperature for any one of the

channels. This can also be configured for the channel having the highest temperature of the transformer. This function allows making this selection.

F 7: Maximum Temperature Recording Parameters The Maximum temperatures are recorded in NVRAM, so that they are available even after

power failure. The NVRAM has limited erase and write capabilities. The capabilities are enough for a long life of the controller. However, to enhance the life of NVRAM, it is recommended that this erase and write cycles are minimized. One of the ways to minimize the erase / write cycles is to avoid storing unnecessarily low values which may not be meaningful. Therefore, the threshold setting of 100 oC or 120oC can be used. To further reduce the erase / write cycles, the resolution (steps) can be 2oC or 4oC or even higher, depending on the user’s choice.

For this, the user is prompted to feed these two values. Record Maximum temperature above (xxx oC): Minimum temperature for storing: This is the temperature at which the controller will start memorizing the maximum temperature. Kindly note that maximum temperature facility is available for temperatures from 0 to 300 OC. It is just that the recorded value below this setting will not be available after power failure. Record Maximum temperature in steps of (S.xx oC): This is the resolution of the reading being recorded. The default value is 2oC. This means that the maximum temperature will be recorded only if the new maximum temperature reading is greater by 2oC from the earlier recorded maximum temperature. This is effective once the temp. increases beyond the “Record Maximum temp. above” setting described in point no. 1.


F 8: Calibration of channels Usually there is no need for re-calibration of the controller. However, in case of need, it can

be calibrated with ease. All four channels need to be calibrated individually. For this, Select channel no 1 and press Enter. A message S h t (short) is displayed. Short all the three terminals of the respective

RTD/Channel and press Enter. r 5 0. 0 is displayed. Connect 150.0 ohm ± 0.1% ¼ W resistor between terminal no. 1 & 2

meant for this RTD and short terminal no 2 & 3. Press Enter.

This completes the calibration for channel 1. The controller will complete the necessary calculations & manipulations internally.

Repeat the similar procedure for other channels. After completing the calibration of all the channels, press Esc. The controller will restart and

show P r G message after sign on message.

F 9: Restore factory calibration values With this function original factory calibration can be restored.

Important Note: 1. At any stage in Set mode or Function mode, if no key is pressed for about 60

seconds, the controller will return to display Program message. 2. After making all the necessary settings,

a. Put the Prog. switch into Off position. The controller will go to normal mode of operation.

b. Verify these settings using Operator interface.

Page 7

INSTALLATION

The controller is designed for indoor / marshalling box application. Anti-vibration mountings, along with necessary screws, have been provided with the controller. Make appropriate arrangements for fixing this controller in marshalling box referring dimensional & mounting details given in Annexure-2.

RTD sensors are to be installed in the transformer windings. For this, kindly refer our application note AN-202 Installation of RTDs on CRT.

TR-7570 has a provision to accept four RTD signals from the transformer. In its standard configuration, TR-7570 comes with three RTD sensors for three phase winding signals & is programmed to accept only three sensors. Usually, these three numbers of RTDs are installed in three L.V. phase windings of the transformer. If customer desires, a fourth RTD can be used to monitor core temperature. In that case, appropriate programming change to include the fourth channel has to be made.

The leads from these RTDs have to be brought to TR-7570 for termination on terminals 1 to 12 as shown in Annexure - 3 (Typical connection diagram for TR-7570). Care should be taken to connect RTD leads in proper sequence to the controller. All external leads are to be taken inside the controller, by puncturing rubber grommets provided on the bottom side of the controller. Alternatively, suitable cable glands can be provided for this by removing these rubber grommets. Do not leave sensor leads in hanging and loose conditions. Tie them properly and rigidly so that they are securely in place. Excess lead length should be accommodated in the controller rather than in the transformer enclosure. In case the sensor leads are required to be cut, do not solder the free ends of the sensor leads – provide suitable end ferrules.

Control Relay contacts are available on terminals 13 to 24. They should be wired in external control circuit appropriately. Schematic and indicative wiring scheme is depicted in Annx – 3.

Auxiliary power of appropriate rating is to be given on terminals 28, 29 & 30. At a time the controller can accept only one power i.e. either 240 VAC or 110 VAC. These power connections should be made very carefully. For safety of the transformer, ensure to maintain power to TR-7570 all the time, whenever the transformer is energized. Further, in case of insufficient power, the controller will go into a standby mode and stop its normal operation, thereby jeopardizing the safety of the transformer. Therefore, ensure to have proper supply of specified rating.

Earthing connection should be made at earthing stud provided on the controller body. Signal for remote indication is available at terminals 25 & 26. After making connections, close the front cover of the controller. On switching on power, sign on message t r. 7 5 7 0 will flash across the display and the

controller will start with Normal mode. In this mode, the controller will display temperature of the three phase windings sequentially. Normally, the controller should be left in this mode.

Operator can check and monitor maximum temperature or reset these maximum temperatures with the help of push buttons provided on the front cover.

Caution: Never mount TR-7570 inside the transformer enclosure, as the temperature inside the enclosure is likely to be more than the permissible max. ambient temperature limit (50 OC) for the controller.


OPERATION

Normal Operation During normal operation, TR-7570 measures temp. of all the three windings and displays

them sequentially in oC. It constantly compares these temperatures with set values for fan operation & for giving alarm (high) and trip (Very high) signals for the transformer. Before giving these signals, TR-7570 verifies these conditions for set period of time delay, thereby avoiding false or nuisance operation of the relays. During normal operation, with proper power supply and all healthy sensor conditions, fault relay will remain energized.

Standby Mode The controller will go into standby mode in case of insufficient auxiliary power for its safe

operation. The controller will revert back automatically to its normal operating mode, as soon as the power supply normalizes. In standby mode, the state of the fault relay is purely governed by available power level and cannot be defined.

Temperature and Channel Display Temperature of the winding is displayed in oC directly on the 3-digit display marked

“Temperature”. This temperature display is also used for giving messages like o P n., U d r. & o v r. for conditions corresponding to, sensor (RTD) open, sensor short / under-range and over-range respectively. The corresponding channel (RTD) number is displayed on adjacent single digit display marked “Channel”.

Both these displays are also used for viewing & setting all the parameters like display speed, relay set points, relay differentials, etc. etc.

LED Indicators Eight LEDs are provided to indicate the following:

1) Function LED adjacent to Func / Esc key a) Steady glowing LED indicates that:

i) The controller is in function mode. ii) The display is not showing actual temperature.

2) Auto/Manual LED adjacent to Auto/Manual key a) Steady glowing LED indicates that the controller is in auto mode.

3) Set LED indicated as “Set” a) Steady glowing LED indicates that:

i) The controller is in set mode ii) The display is not showing actual temperature.

4) Maximum LED indicated as “Max.” a) Steady Glowing of LED indicates that

i) Display is showing maximum temperature of each individual channel. b) Blinking of LED indicates that

i) Display is showing the channel which has the highest temperature. 5) Fault LED

a) Steady Glowing of LED indicates that i) Any one or more channels have Open circuited sensor(s) or ii) Any one or more channels have Short circuited sensor(s) or

Page 9

iii) Any one or more channel’s sensor is wrongly connected or iv) Any one or more channel’s temperature is under-range or over-range.

b) Blinking LED indicates that i) Programming Mode is on ii) The transformer is unprotected iii) The Fault relay will turn on and off.

6) Fan LED a) Glowing of LED indicates that:

i) Fan Relay / Switch is in energized state ii) In Function no 3 it indicates this relay is included in relay grouping of the channel.

7) High LED a) Glowing of LED indicates that:

i) High relay/switch is in energized state ii) In Function no 3 it indicates this relay is included in relay grouping of the channel.

8) V. High LED (Very high LED) a) Glowing of LED indicates that:

i) Very High relay/switch is in energized state ii) In Function no 3 it indicates this relay is included in relay grouping of the channel.

Fault Conditions When power is applied to the controller, the fault relay energizes. The fault relay will

de-energize: • If the auxiliary power to the controller fails (also termed as Electric fail fault) or • any one or more channels have Open circuited sensor or • any one or more channels have Short circuited sensor or • any one or more channel’s sensor is wrongly connected or • any one or more channel’s Temperature is under-range i.e. below -50 oC or • any one or more channel’s Temperature is over-range i.e. above 300 oC.

Display Messages O P n. - OPEN indicates that

the Sensor is open circuited. U d r. - Under-range indicates that

the temperature measured is under-range i.e. below -50oC or the sensor is short-circuited or the sensor is wrongly connected.

O v r. - Over-range indicates that the temperature measured is over-range i.e. above 300 oC.

Relay operation • Fault Relay: Normally energized and to de-energize on fault conditions • High Relay: To energize when temperature rises above set High limit. The contacts of

this relay are usually used for generating over temperature alarm for the transformer. • Very High Relay: To energize when temperature rises above set Very High limit. The

contacts of this relay are usually used for tripping the transformer on account of excessive temperature rise of the transformer.

• Fan Relay: To start cooling fan when transformer temp. rises above set level for this operation.


DEFAULT SETTINGS & SETTING LIMITS

Channel Status Channel 1 / RTD 1: Undeleted (On) Channel 2 / RTD 2: Undeleted (On) Channel 3 / RTD 3: Undeleted (On) Channel 4 / RTD 4: Deleted (Off)

Relay grouping Channel 1 / RTD 1: will operate High, Very High and Fan relays Channel 2 / RTD 2: will operate High, Very High and Fan relays Channel 3 / RTD 3: will operate High, Very High and Fan relays Channel 4 / RTD 4: will not operate any relay.

Default setting Setting Limit

Set Point 90 oC 0 - 300 oC.

Differential (d.) 8 oC 0 - 300 oC. Fan Relay

Time Delay (t.) 5 Seconds. 1 - 60 seconds.


Differential (d.) 4 oC 0 – 300 oC. High Relay



Differential (d.) 8 oC 0 - 300 oC. Very High Relay


Above temp. 100 oC. 0 - 300 oC. Record Max. Temp. In steps of (S.) 2 oC. 1 - 20 oC.

Display Speed 4 Seconds 1 - 60 seconds

Remote O/p. for 2nd Channel Channel 1,2,3 or 4 or Current Max. Temp.

Note

• These are the settings usually provided on the controller when it is shipped out of the factory. Against specific orders, the controllers are shipped with the specified settings.

• These settings can be changed over indicated limits. • Any other deviation from standard supply will be indicated in the test report.

Page 11

ENGINEERING SPECIFICATIONS

Technical Specifications Temperature Sensor: RTD (Pt-100 DIN 43760) No. of Sensor Inputs: Four No. of Set-points: Three (High, V.High & Fan.) Indication Range: -50 to 300 OC Set point range 0 to 300 OC Resolution: 1 OC Accuracy: ± 1 OC Display Scan Speed: User Settable (1 - 60 Seconds.) Display: Seven Segment 1/2" red LEDs

One for displaying Channel no. Three for displaying Temperature

Indications: Red LEDs to indicate a) Function Mode b) Set Mode c) Max. Temp. Display Mode d) Auto / Manual mode. e) "Fault" Relay energized. f) "High" Relay energized g) "V. High" Relay energized h) "Fan" Relay energized

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. without packing. Enclosure: IP-52, M.S. Sheet steel powder coated enclosure with acrylic

viewing window

Electrical Supply Voltage: Either one of the following

(1) 240 / 110 VAC (+/- 10 %) 50 / 60 Hz. (2) 90 - 270 VAC/DC (AC supplies 40 – 400 Hz.) (optional) (3) other user specified voltages (optional)

Outputs: Four 1C/O Relay contacts One analog o/p (4-20mA in 250 ohms load) (optional). Contact Rating: 5A at 240VAC Res. load, 100W at 220 VDC. Terminals: Screwed Caged suitable for one 2.5 sq. mm. wire. Insulation: Insulation resistance will be 100Mohm or more when 500 VDC is

applied between each terminal in turn and earth. Controller will withstand 2 KV rms at 50/60 Hz. for 1 min., applied between all relay & supply terminals shorted together and earth.

Power consumption: Max. 15VA

Environmental Operating conditions: Temp.: -20 to 50 oC. R.H.: 95% Max non -condensing.

Temperature

CChannel

Set

Max.

Fault High V. High Fan

Auto

Manual

Press RESET for more than 3 secs.to RESET Max. Temp

R

electronicsPECON

Max.

Enter

Set

Reset

Transformer Protection Relay TR-7570

Power Electronics & Control,.Ahmedabad-382 330.

Func.

Esc.

+

-

24

0V

11

0V

Aux. Supply

N

RTD 1 RTD 2 RTD 3 RTD 4 Fault High Very High Fan Remoteo/p.

~ ~

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 24 25 26 28 29 3022 23

ANNEXURE - 1FRONT LAYOUT DETAILS(View on Opening the Front Cover)

Status Indication LEDsPush-button Keys

Increment Key (Up)

Decrement Key (Dn)

Terminals for External Connections.DIP Switch to selectProgramming mode

NOTE:Terminal 27 does not existProgramming Mode ON

Programming Mode OFF

Prog.

Prog.

Prog.

Fig - 1.a Operator Interface (Manual Mode)

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electronics

TR-7570

x x x x

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

ON

Prog.

ON

Prog.

ON

Blinking LED

Steady On LED

Off LED

xxx LED (On or OFF)

Keep Key Pressed forspecified time in Secs.

Programming mode OFF.

Programming mode ON.

(t)s

x x x x

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

X X X - Actual Temperature CO


C - Channel / RTD number(Normal mode)

ON

X X X

Manual

Auto

C

X X XC

(Manual Mode)

Manual Mode :The display is locked to show the temperatureof manually selectable channel.

ChangeChannel

ChangeChannel

Note :1. All timings are indicative and

approximate.

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electronics

x

x

x

x

x

x

x

x

x

Temperature

Temperature

Channel

Channel

Set

Set

Max.

Max.

Fault

Fault

High

High

V. High

V. High

Fan

Fan

Auto

Auto

Prog.

Prog.

Func.

Func.

Co

Co

X X X - Max. Temp. Deg. C

X X X - Actual Temp. Deg. C

ON

ON

(3)s

(3)s

x x x x

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co



ON

C X X XC

X X XC

X X XC

x x x

x

x

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

ON

Reset Maximum Message

x x x x

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

ON

Reset Maximum Message

Max.

Max.

Max.

Auto

Manual

Reset

Reset

After Reset

After Reset

Norm

al M

ode

Fig - 1.b Operator Interface (Maximum Mode)

(Maximum mode)

C - Channel with highest Temperature.(Current Maximum Mode)

ChangeChannel

Toggle betweenAuto / Manual Mode

TR-7570

Blinking LED

Steady On LED

Off LED

xxx LED (On or OFF)




(t)s

Prog.

ON

Prog.

ON

Notes :1.The controller can be taken out of Set

mode any time using Esc key.2. Any key operation other than indicated

will be ignored by the controller.3. If no key is pressed for 60 secs, the

controller will return to normal mode.

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electronics

x x x x

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co



(SET mode)

ON

X X XX X XC X X

x xx xx xx x

Temperature TemperatureChannel Channel

Set Set

Max. Max.

Fault FaultHigh HighV. High V. HighFan Fan

Auto Auto

Prog.

Func. Func.

Co

Co

X X X - High Set Value CO X X X - Differential C - High

O

ON

Prog.

ON

X X X X X

x xx xx xx x


Set Set

Max. Max.


Auto Auto

Prog. Prog.

Func. Func.

Co

Co

X X X - Very High Set Value CO X X X - Differential C - V. High

O

ON ON

X X X X X

x xx xx xx x


Set Set

Max. Max.


Auto Auto

Prog. Prog.

Func. Func.

Co

Co

X X X - Fan Set Value CO X X X - Differential C - Fan

O

ON ON

Enter Enter

Enter Enter

Enter Enter

Set

Fig - 1.c Operator Interface (SET Mode)

TR-7570

Blinking LED

Steady On LED

Off LED

xxx LED (On or OFF)




(t)s

Prog.

ON

Prog.

ON

Notes :1.The controller can be taken out of

Function mode any time using Esc key.2. If no key is pressed for 60 secs, the


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x x x x

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co



ON

X X XC

Fig - 1.d Operator Interface (Function Mode)

x

x

x

x

x

x

x

x

Temperature

Temperature

Channel

Channel

Set

Set

Max.

Max.

Fault

Fault

High

High

V. High

V. High

Fan

Fan

Auto

Auto

Prog.

Prog.

Func.

Func.

Co

Co

(Function mode)

(Function mode)

ON

ON

x x x x

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

X X - Display Speed Secs.

Fn. 1- Display Speed.


ON

X X

Enter Enter

Func.

X

Continued To Next Page

X = Either 0 or last enteredFunction number

TR-7570

Blinking LED

Steady On LED

Off LED

xxx LED (On or OFF)




(t)s

ChangeFunction No.

ChangeFunction No.

Esc.

Prog.

ON

Prog.

ON

P E C O NR

electronics

Fig - 1.e Operator Interface (Function Mode)

Continued from Prev. Page

TemperatureChannel

xx x x

xx x x xx x x xx x x

xx x x

Set

Max.


Auto

Prog.

Func.

Co

(Function mode)

ON

x x x x x


Set Set

Max. Max.


Auto Auto

Prog. Prog.

Func. Func.

Co

Co

X - Channel numberFn. 3 - Relay Grouping X - Channel number

ON ON

X X

Enter Enter Esc.

Esc.

Relay controlled by this channel areindicated by glowing of respective LEDs


X X X X


Set Set

Max. Max.


Auto Auto

Prog. Prog.

Func. Func.

Co

Co

X X - Delay in Secs for High Relay.Fn. 2- Time Delay for Relay Operations. X X - Delay in Secs for V. High Relay.

ON ON

Enter

Enter

Enter

Enter

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

ON

X X - Delay in Secs for Fan Relay.

X X

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

ON

ChangeFunction No.

ChangeFunction No.

ChangeChannel no.




TR-7570

Blinking LED

Steady On LED

Off LED

xxx LED (On or OFF)




(t)s

(Function mode)

Prog.

ON

Prog.

ON

P E C O NR

electronics

Fig - 1.f Operator Interface (Function Mode)

x x x x

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

(Function mode)

ON

x xx x x x x x


Set Set

Max. Max.


Auto Auto

Prog. Prog.

Func. Func.

Co

Co

X - Channel numberFn.5 - Remote O/p Selection. Channel with Highest Temp.

ON ON

X

Enter Enter

- means MAX.

OR


x x x x

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

(Function mode)

ON

x xx x x x x x


Set Set

Max. Max.


Auto Auto

Prog. Prog.

Func. Func.

Co

Co

X X X - Record Maximum Above Deg. C X X - Record Maximum in Steps of Deg. C

ON ON

Enter Enter Enter

X X X X X




TR-7570

Blinking LED

Steady On LED

Off LED

xxx LED (On or OFF)




(t)s

ChangeFunction No.

Prog.

ON

Prog.

ON

P E C O NR

electronics

(SET mode)

X X X X X XX X X


Set Set

Max. Max.


Auto Auto

Prog.

Func. Func.

Co

Co

X X X - High Set Value CO X X X - High S.P. Differential C

O

ON

Prog.

ON

X X X X X X


Set Set

Max. Max.


Auto Auto

Prog. Prog.

Func. Func.

Co

Co

X X X - Very High Set Value CO X X X - V. High S.P. Differential C

O

ON ON

X X X X X X


Set Set

Max. Max.


Auto Auto

Prog. Prog.

Func. Func.

Co

Co

X X X - Fan Set Value CO X X X - Fan S.P. Differential C

O

ON ON

Enter Enter

Enter Enter

Enter Enter

Set

Fig - 2.a Programming mode (SET Mode)

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

Program message

(Programming mode)

ON

ChangeXXX

ChangeXXX

ChangeXXX

ChangeXXX

ChangeXXX

ChangeXXX

Return after saving new set values

TR-7570

Blinking LED

Steady On LED

Off LED

xxx LED (On or OFF)




(t)s

Notes :1. The new set values are saved for future

use only if the the whole cycle iscompleted.

2. The controller can be taken out of Setmode any time using Esc key.

3. Any key operation other than indicatedwill be ignored by the controller.

4. If no key is pressed for 60 secs, thecontroller will return to displayProgram message.

Prog.

ON

Prog.

ON

P E C O NR

electronics

Fig - 2.b Programming mode (Function Mode)

Temperature

Temperature

Channel

Channel

Set

Set

Max.

Max.

Fault

Fault

High

High

V. High

V. High

Fan

Fan

Auto

Auto

Prog.

Prog.

Func.

Func.

Co

Co

(Function mode)

(Function mode)

ON

ON

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

X X - Display Speed Secs.



ON

X X

Enter

Enter

X


X = Either 0 or last usedFunction number

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

Program message

(Programming mode)

ON

ChangeFunction No.

ChangeValue XX

TR-7570

Blinking LED

Steady On LED

Off LED

xxx LED (On or OFF)




(t)sFunc.

Esc.

ChangeFunction No.


Function any time using Esc key.2. If no key is pressed for 60 secs, the

controller will return to displayProgram message.

Prog.

ON

Prog.

ON

P E C O NR

electronics

X X X X


Set Set

Max. Max.


Auto Auto

Prog. Prog.

Func. Func.

Co

Co

X X - Delay in Secs for High Relay.Fn. 2- Time Delay for Relay Operations. X X - Delay in Secs for V. High Relay.

ON ON

Enter

Enter

Enter

Enter

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

ON

X X - Delay in Secs for Fan Relay.

X X

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

ON


TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

(Function mode)

ON

x x x


Set Set

Max. Max.


Auto Auto

Prog. Prog.

Func. Func.

Co

Co

X - Channel numberFn. 3 - Relay Grouping X - Channel number

ON ON

X X

Enter

Enter

Esc.

Esc.

Relay controlled by this channelare indicated by glowing ofrespective of LEDs

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

Restart message

ON

Y

Enter

To change Ybetween

h means highH means Very HighandF means Fan

To toggle the status ofLED corresponding to Y

ChangeValue XX

ChangeValue XX

ChangeValue XX

ChangeFunction No.


ChangeFunction No.

Change Channel

Controller restarts & displays PRGafter flash on message.

Fig - 2.c Programming mode (Function Mode)

TR-7570

Blinking LED

Steady On LED

Off LED

xxx LED (On or OFF)




(t)s




Prog.

ON

Prog.

ON

P E C O NR

electronics

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

(Function mode)

ON

Temperature Temperature

Temperature

Channel Channel

Channel

Set Set

Set

Max. Max.

Max.

Fault Fault

Fault

High High

High

V. High V. High

V. High

Fan Fan

Fan

Auto Auto

Auto

Prog. Prog.

Prog.

Func. Func.

Func.

Co

Co

Co

X - Channel number X - Channel number

X - Channel number

Fn.4 - Add / Delete Channels

ON ON

ON

X

X

X

Enter

Enter


Esc.

Toggle betweenmessageon and off

Select Channel

Esc.

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

Restart message

ON

Fig - 2.d Programming mode (Function Mode)

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

(Function mode)

ON

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

X - Channel numberFn.5 - Remote O/p Selection.

ON

X

Enter

Enter

OR

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

Channel with Highest Temp.

ON

- means MAX.

Change between Channel 1,2,3, 4and Highest temperature Channel

SelectFunction No.

Save newValue


SelectFunction No.

TR-7570

Blinking LED

Steady On LED

Off LED

xxx LED (On or OFF)




(t)s





Prog.

ON

Prog.

ON

P E C O NR

electronics

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

(Function mode)

ON


Set Set

Max. Max.


Auto Auto

Prog. Prog.

Func. Func.

Co

Co

X X X - Record Maximum Above Deg. CFn.7- Max. Temp. Recording Parameters X X - Record Maximum in Steps of Deg. C

ON ON

Enter Enter Enter

X X X X X


SelectFunction No.

ChangeValue XXX

ChangeValue XX

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

(Function mode)

ON


Set Set

Max. Max.


Auto Auto

Prog. Prog.

Func. Func.

Co

Co

X - Channel number X - Channel numberFn.9 - Default Calibration

ON ON

Enter

Enter Enter

Toggle betweenYes & Nol

Will return withoutmaking any changes

Will return with factorycalibration values


SelectFunction No.

Fig - 2.e Programming mode (Function Mode)

TR-7570

Blinking LED

Steady On LED

Off LED

xxx LED (On or OFF)




(t)s




Prog.

ON

Prog.

ON

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

(Function mode)

ON

Temperature

Temperature

Temperature

Channel

Channel

Channel

Set

Set

Set

Max.

Max.

Max.

Fault

Fault

Fault

High

High

High

V. High

V. High

V. High

Fan

Fan

Fan

Auto

Auto

Auto

Prog.

Prog.

Prog.

Func.

Func.

Func.

Co

Co

Co

X - Channel number

Resistor Value - 100.0 ohms

Fn. 8 - Calibration

ON

ON

ON

X

Enter

SelectChannel no.

Short the three terminalsfor RTD - X

Put a 150.0 (0.1%) resistorbetween first and second terminal for RTD-XShort second and third terminal for RTD-X

Enter

Enter

EnterEsc.

Esc.

TemperatureChannel

Set

Max.


Auto

Prog.

Func.

Co

Restart message

ON

Fig - 2.f Programming mode (Function Mode)

P E C O NR

electronics

TR-7570

Blinking LED

Steady On LED

Off LED

xxx LED (On or OFF)




(t)s

Notes :

2.The controller can be taken out ofFunction any time using Esc key.

3. If no key is pressed for 60 secs, thecontroller will return to displayProgram message.

1. As this is a very important and criticaladjustment, care should be taken not topress any key other than depicted as itmay lead to wrong calibration.



Prog.

ON

Prog.

ON

oC

d = differential / hysterysis in relay operation - oCt = time delay in relay operation - seconds

Set point : 180 Cd = 8 Ct = 7 Sec

o

o


o

o


o

o

Tra

nsfo

rme

rW

ind

ing

Te

mp

era

ture

180172

160156

9082

d for Very High Relay

d for High Relay

d for Fan Relay

Fan

Rela

yH

igh

Rela

yV

ery

Hig

hR

ela

y

time

time

time

time

t

t t tt

t

tt

t

t t

P E C O NR

electronicsFig - 3 Relay Operation (For Default Settings)

TR-7570

Off

On

Off

On

Off

On

X X= =

235 (+5/-0)

15

0 (

+5

/-0

)

M6 Threads

MOUNTING DETAILSFRONT VIEW

BOTTOM VIEW

130

A

SIDE VIEW

ControllerMounting Slot

Anti VibrationRubber

6 mm X 30 mm LongFixing Screw

Mounting Plate ofPurchaser

(Max. 6 mm thick)

27

17

2

DETAIL-A

Plain Washer75 55 35 Earthing Stud

(1/4" x 3/4" SCREW)

3 x 25.4 Dia (1")Hole for cable gland

C

X X= =

235 (+5/-0)

15

0 (

+5

/-0

)

M6 Threads

MOUNTING DETAILSFRONT VIEW

BOTTOM VIEW

130

A

SIDE VIEW

ControllerMounting Slot

Anti VibrationRubber

6 mm X 30 mm LongFixing Screw

Mounting Plate ofPurchaser

(Max. 6 mm thick)

27

17

2

DETAIL-A

Plain Washer75 55 35 Earthing Stud

(1/4" x 3/4" SCREW)

3 x 25.4 Dia (1")Hole for cable gland

C

TR-7570Transformer Protection Relay

P E C O NR

electronics

Power Electronics & ControlAhmedabad : 382 330

265

21

5

30

40

Note : - All dimensions are in m.m.- Mounting assembly shown atonly one bracket

Front CoverFixing Screw(Open for makingconnectionsand settings)

Nut andPlain Washer

ANNEXURE - 2DIMENSIONAL & MOUNTINGDETAILS OF TR-7570

~

~

Fault AlarmTripCoil

Contactorfor Fan

Terminal block

Use2.5 mm2 Teflon covered

copper wiresfor extension

RTD embededinside the coil

CR / DRY TYPE TRANSFORMER

RTD RTD RTD

To terminal block

ANNEXURE - 3

CONNECTION DIAGRAMFOR

WTI-SCANNER TR-7570

PECON - WTI/SCANNERTR-7570

1 2 3 4 5 6 7 8 9 10 11 12

13141516171819202122

2423

302928

Sr.No. Item Type No. Qty. Location.

1 WTI/Scanner TR-7570 1 Marshalling Box

2 RTD Pt-100 S-02 3Embended in

Trafo. windings

3

4

Remote Indicator

Alarm / Hooter

RWTI-400

AL-03

1

1

Optional on RTCC

Annunciator / RTCC

TemperatureChannel

Set

Max.


CAux. Supply(fused)

For Aux supply 240 VACConnect Neutral at Terminal 30Connect Line at Terminal 28

For Aux Supply 110 VACConnect Neutral at Terminal 30Connect Line at Terminal 29

Note : Fault relay is normally in energized state.It de-energizes on Fault condition.

SU

PP

LY

Note : 1) Numbers in are terminal nos. on TR-7570.

Terminal no 27 does not exist

2) Remote output can be programmed for either one of the channels

or to correspond to the maximum temperature being monitored

1 2 3

RTD-1 CONNECTIONSTO TR-7570

White Red

25 26

+

-4-20 mA Remote Indicator(RWTI-400 or Equivalent)

Aux.Supply

Pt-100

Red

White

Red

Power

Electronics

& Control

Title

Date Scale Drg. no.

RTD Sensor S-02

PEC/02041201NTS01/08/1999Ahmedabad

P E C O N

R

electronics

Re

d

Re

d

Wh

ite

Pt -

10

0

RTD Sensor S-02

40 mm max.

4 mm

3 mm dia Ceramic, Pt-100 elementinside heat shrink sleeve

Extention leads teflon over teflon insulated silver platedcopper wires 24/7/32 AWG terminated on Bootlace ferrules(Standard lead length is 1000 mm )+25 mm

Pt-100 Temperature - resistance characteristic (DIN 43760)

Temp. Deg. C. 0.00-25.00 50.00

90.15 100.00 119.40

100.00

138.50

150.00 200.00

175.84157.31Resistance Ohms

Note :1) RTD Sensor S-02 is suitable over -50 to +200 temperature range2) Sensor S-02 is Class B IEC 751

permissible error = ± [ 0.3 + (.005 x t) ]where t is the temperature in .

3) Longer lead lengths are available for specific needs.

O

O

O

C

CC

These sensors are tested for :

1) Dimensions

2) Calibration at 50 , 100 C & at 180 C

3) Dielectric Strength : 2KV rms for 1 min.

OC

O O

Doc. No.: 02041201

Documents

Engg. Manual TR-7570