EcoStruxure Transformer Sensor Installation Guide

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Introduction

IMPORTANT: Schneider Electric strictly advise against installations on live transformers.
This document is a template guide for the installation of the EcoStruxure Transformer Expert Sensor. It is provided for general information only and is not intended to be a replacement for organizational Standard Operating, Safe Work and Workplace Health and Safety Procedures.
Schneider Electric recommends that the following information be adapted for use by each organization as needed.
 
Before going through this article, please visit EcoStruxure Transformer Sensor Planning Guide to select the right product. An animated overview of the installation process is provided below:

 

EcoStruxure Transformer Sensor Installation Guide 

Step 1 Plan a Safe Work Site

Ascertain and ensure work complies with all relevant site management procedures.

Step 2 Confirm Proposed EcoStruxure Transformer Sensor Location

See EcoStruxure Transformer Expert Site Planning Work Instruction Guide.

Step 3 Confirm EcoStruxure Transformer Sensor Packing List

  1. EcoStruxure Transformer Expert
  2. ETE Adapter (1⁄2” female BSPP to 3⁄4” male BSPP/NPT machined connector with bleed valve)
  3. DIN rail mount power supply (HDR-15-24):
    • Input: 85 – 264 VAC (120 – 370 VDC)
    • Output: 24 VDC
  4. Low voltage power cable with M12 connector
  5. External temperature sensor with 10m cable and M12 connector
  6. In-line cable ties for affixing external temperature sensor

Note : If you are installing an add on hydrogen sensor with ETE please also visit Installation: H2Scan Dual Sensor.

Step 4 Confirm EcoStruxure Transformer Sensor Specification

Prior to installation, ensure the sensor is undamaged.

Ensure the EcoStruxure Transformer Sensor has not been damaged in transport or during a previous installation attempt. In particular, check the Teflon end-tip for signs of damage and that it is secure and tight. If there are any signs of damage, or if the tip or shaft is loose or out of shape, do not proceed with the installation. Contact Schneider Electric at support.dts@se.com for a replacement.

Prior to installation ensure the sensor is the right length.

The probe of EcoStruxure Transformer Sensor only needs to reach within 50 mm of tank oil flow in 75mm valve stems and 35 mm for 50mm valve stems to have sufficient oil flow to report accurate data. It should not extend more than 20 mm into the transformer tank (beyond the tank’s internal wall) to ensure that the sensor tip is not exposed to excessively high magnetic fields.

 

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Before installation, double-check the length of the supplied EcoStruxure Transformer Sensor against the length of the transformer pipe. If the sensor is likely to penetrate too far into the tank, consider using a male-to-female ½” spacers to extend the length of the mounting assembly. These spacers are commonly available. Alternatively, a different probe length can be sourced from your supplier or Schneider Electric.

Step 5 Installation of EcoStruxure Transformer Sensor

The EcoStruxure Transformer Expert probe can be inserted in either the top or bottom oil via a gate valve in the tank or pipe leading to or from the radiator. The external temperature sensor should be attached on the opposite side. Therefore if the probe is inserted in the bottom oil then the external sensor should be attached at the top around a pipe or on the tank, so that it can get a reading of the top oil temperature.

 

  1. Ensure that the valve is closed or, if there is no valve, that excessive oil leakage will be avoided. Remove the plug from the transformer valve pipe.

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2. Following internal workplace practices, wipe the sealing surfaces and internal thread clean.

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  1. If required, install additional adapters (threaded flange plate, reducing bush, etc.) until a female, ¾” BSPP/NPT thread is available on the valve. See examples in attached hardware list at the bottom of the article.

  2. Inspect the two O-rings inside the provided ETE adapter for any signs of damage. Lubricate the O-rings with oil.

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  1. Using a sealing compound (or PTFE tape), screw the adapter (male, ¾” BSPP/NPT) into the female thread on the pipe, flange plate or bush. After tightening, ensure the bleed valve in the adapter is facing upwards. Examples from 2 different transformer valves are shown below.

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Example 1: DN25 Flange Plate

                                                

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Example 2: No Flange Plate

  1. Insert the EcoStruxure Transformer Sensor into the adapter by pushing firmly until the Teflon end-tip is past the two O-rings (approx. 70 mm). Ensure that the tip of the probe is clear of the valve opening mechanism.

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  1. At the adapter, open the bleed valve by loosening the screw. The bleed valve screw requires a 2.0 mm (5/64”) hex screwdriver.
    Note : Ensure the integrity of O-ring (BS-002) under the screw.

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  1. Open the transformer valve. Allow the valve and adapter to fill with oil and any trapped air to escape. Tighten the bleed valve screw by applying nut over the screw until it is in contact with the body and then use hex key to tighten the screw. This is to prevent the escape of excess oil.

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  1. Push the probe further through the adapter and into the transformer pipe, stopping just before the thread on the sensor.

Note that the probe should not extend further than 20 mm beyond the internal wall of the transformer tank.
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  1. Apply suitable thread tape to the male ½” BSPP thread on the EcoStruxure Transformer Sensor unit. Screw the sensor into the adapter and adjust the angle of the sensor so that the M12 connectors are angled downward. This prevents the pooling of water around the connectors and allows the cables to enter with a sufficient drip angle.

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Example 1: DN25 Flange Plate

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Example 2: No Flange Plate

Step 6 External Temperature Sensor

The EcoStruxure Transformer Expert probe can be inserted in either the top or bottom oil valve in the tank or pipe leading to or from the radiator. The external temperature sensor should be attached on the opposite side. Therefore if the probe is inserted in the bottom oil valve then the external sensor should be attached at the top around a pipe to the radiator or on the tank, so that it can get a reading of the top oil temperature. In the example below we are connecting the external temperature sensor to a radiator pipe.

  1. Using the supplied in-line cable ties, attach the external temperature sensor to a suitable radiator pipe at the top of the transformer. Ensure that the exposed metal pad of the sensor is in direct contact with the pipe to guarantee a good thermal connection.

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  1. Route the external temperature sensor cable to the main EcoStruxure Transformer Expert unit. Secure with split conduit or cable ties in accordance with internal company procedures.

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  1. Screw the male 5-pin M12 connector of the external temperature sensor into the EcoStruxure Transformer Expert unit.       
 

Step 7 Power Supply

The EcoStruxure Transformer Expert is provided standard with an 85 – 264 VAC (110 – 370 VDC) to 24 VDC, DIN rail mount power supply and low voltage cabling with a pre-installed 5-pin M12 connector.

  1. Install the DIN rail mount power supply into a suitable power panel/switchboard in accordance with electrical installation rules and internal company procedures. Connect the live and neutral terminals on the power supply to any mains supply in the voltage range: 85 – 264 VAC or 110 – 370 VDC. Schneider Electric recommends that the supply be connected through a 6A circuit breaker.
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  1. Route the provided low voltage power cable from the low voltage side of the DIN rail power supply to the EcoStruxure Transformer Sensor, in accordance with your organization’s electrical work standards. ENSURE THE RED CORE ON THE PROVIDED CABLE IS CONNECTED TO THE +V TERMINAL ON THE POWER SUPPLY AND THE BLACK CORE IS CONNECTED TO THE -V TERMINAL (SEE PICTURE BELOW). The cable should be enclosed in a flexible conduit where possible.

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  1. Screw the female 5-pin M12 connector of the power cable into the EcoStruxure Transformer Sensor. If a power cable other than the supplied low cable has been used, ensure that the +V on the power supply is connected to Pin 1 on the M12 connector and -V on the power supply is connected to Pin 3 on the M12 connector.

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Step 8 Powering Up the EcoStruxure Transformer Sensor

  1. Once the sensor is fully installed, switch on power to the device. Always delay 2 minutes after turn-on before turning off and delay 20 seconds after turn-off before turning on.

  2. Wait for 5 to 10 minutes to give the logger time to complete its first upload.

  3. On a phone, laptop, or tablet, go to http://install.aurtra.net/ and enter the 7-digit Logger ID of the installed device. The Logger ID can be found near the connectors (see below).

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  1. The http://install.aurtra.net/ website will confirm if the unit has successfully uploaded and will provide the initial temperature and moisture reading from the sensor. Please note that this record will only last for 1 hour after the upload has occurred. If the test is unsuccessful, see the Troubleshooting guide below.

  2. If the installation was successful, data will be available on the Schneider Electric website (https://www.aurtra.net/) within 30 hours of powering up the EcoStruxure Transformer Sensor.

  3. Authorized users will receive an email containing their account information which can be used to login and view the data pertaining to their transformer.

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Having trouble with the installation? Installation Troubleshooting
 
 
Once the installation is done please proceed to create the asset in the dashboard and configure it.
 
The documents related to installation are attached at the bottom of this article.
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