5 – Installing your metering equipment (in Retail Stores)

 

Wattics energy management solution for retail stores

Step-by-step procedures for monitoring and benchmarking of HVAC, lighting and power outlets within/across stores.

 

At this stage, you have done your site survey, put together your project proposal based on the electrical diagram, and you know which circuits you are going to monitor. If all went according to plan your Internet point(s) are ready and the MCB(s) that you will need to power up your meter(s) have been installed already.

This fifth post illustrates how to install your electrical meters and 3G routers.

1 – Gathering information for your project proposal
2 – Preparing your project proposal
3 – Preparing your quote
4 – Preparing your installation
5 – Installing your metering equipment

 

 

Installation steps below should be followed for 3-phase 4-wire (three phases with a neutral) Wye/Star electrical systems typical to European member states, UAE, Malaysia, China and more. Separate installations steps will be shared for other electrical systems and if other equipment is deployed.

  • WattREV 6-channel powermeter + CTs
  • WattVIM 1-channel powermeter + CTs
  • 3G WattROUTER

Get started

 

On installation date, your electrician will come on site with meter(s), CTs and other equipment supplied by Wattics or through Wattics partners.

The electrician will locate the rooms where to find the distribution board(s) and circuits of interest. He will open the cabinets to check the electrical installation, this is where the CTs will be deployed.

 

Prepare your meter installation report

Before the actual electrical wiring starts it is good practice that you plan and document which CT will be used for which circuit, and how they will connect them back to the meter.

The first step is to choose CTs with the most suitable primary rating for the circuit being monitored (e.g. a CT with a 300A primary rating for a circuit fed through a 250A circuit breaker).

You can then label all the CT heads to facilitate deployment and not get mixed with all the CTs around (e.g. a CT head labeled 4-3 will be clamped to Line 3 of your circuit number 4).

The labeling of the CT leads is also useful to avoid getting the leads mixed when pulling them through the distribution board, and to quickly identify where to connect the CT leads back at the meter terminals (e.g. a CT lead labeled 4-3 will be clamped to the meter input terminal I16 when using the WattREV-6 meter – see table below).

 

 

You can now fill in your meter installation report now that your CTs are labelled.

 

 

A WattREV-6 Meter Installation Report template is available for download here

A WattVIM-1 Meter Installation Report template is available for download here

 

Start the installation

 

  • Installation must take place according to the documentation, using suitable equipment and tools.
  • Devices must be installed without voltage applied and by qualified personnel.
  • General safety regulations and nationally applicable accident prevention guidelines must be observed.
  • Electrical installation must be carried out according to the relevant safety guidelines

Depending on your project proposal you may either need to deploy WattREV-6 or WattVIM-1 meters.

 

WattREV-6 installation steps

STEP 1: Provide voltage references to your meter

Wire the meter voltage reference inputs to a Type C 6AMP 3P breaker to provide voltage reference for power calculation. Make sure the breaker is in the OFF position.

Note: the breaker must be fed from the same transformer as the circuits being monitored to ensure that the correct voltage references are applied for power calculations.

 

STEP 2: Supply your meter

Wire the meter L and N voltage supply inputs to the breaker L1 and N output terminals or short the V1 and VN reference voltage lines to the L and N voltage supply lines.

or
 

STEP 3: Prepare the meter for CT connections

Carefully attach the meter to the din rail pre-mounted within the Board compartment or outside within an enclosure. This process can also be done once all the CTs are wired, in the case wiring is made easier with the meter outside its compartment.

You can now remove the two current measurements terminal blocks from the meter (see below cover and terminal).

 

STEP 4: Deploy the CTs

The next step is to clamp the CTs to the electrical circuits and wire them back to the meter current measurements terminal blocks.

The wiring of each successive CT to the meter must happen as follows with extreme precautions:

  • Power down the circuit (working with live circuits may be possible if all safety precautions are taken)
  • Position the CT next to the circuit to be clamped (e.g. CT head label 2-1 is located inside the cable compartment next to Line 1 of Plantroom circuit 2)
  • Pull the CT lead back to the meter via pre-mounted cable glands, trunken and other covers.
  • Wire the two CT lead wires to the correct meter terminal input. Take the positive (white or red) lead wire and insert it into the correct upper circular opening of the current measurement terminal (see image below). A tiny screwdriver should be inserted into the upper square opening and pressed down to allow the lead wire to be inserted properly.

    Repeat the above step to install the negative lead wire (black or brown) of the lead in the lower circular opening.
    White/Red wire = + (positive)
    Black/Brown wire = – (negative)

    Repeat for all CTs and place the terminal block back into the meter module when all wiring is complete.

  • Clamp the CT heads to the circuit paying attention to the labels
  • Power the circuit back up if it was powered off (after all CTs have been deployed)

At this stage, the meter is wired to the circuit breaker and all CTs are clamped and wired back to the meter.

STEP 5: Switch on the breaker

Switch on the breaker to supply power to the new meter. The meter will power up and will after a few seconds emit a red LED light (L1).

 

STEP 6: Configure your meter

The meter has a total of 18 current measurements terminal inputs called channels, that have been used to monitor up to 6 three-phase circuits (see installation report). You must configure your meter channels to the correct primary rating size of the CTs wired to them (e.g. 300A). This procedure is executed via the meter display:

    • Press the meter display’s left and right arrows together to go back to top menu

    • Select the Settings menu, enter the password 0000, then scroll left until you reach the CT TYPE submenu. There you need to set the correct AMPERE size of the CTs connected to each meter channel. For example, if you used a WattCT-250-333 CT to monitor the three phases of your circuit 5, you need to set a value of 250 for the meter channels I11, I14 and I17.

  • Press the OK button to register the meter channel AMPERE value, and move on to the next channel until you are done.

 

WattVIM-1 installation steps

Will be completed shortly

 

Common installation steps

STEP 7: Provide network access to your meter

Connect an Ethernet cat5 cable to a live Internet point.

STEP 8: Submit your installation report

Submit your installation report to Wattics via:

http://www.wattics.com/installation-reports/

Wattics will use your installation report to double check that data is being received from your meter and correctly showing in your dashboard. From then on you will be able to log in to your Wattics Dashboard at http://dash.wattics.com and get started!

 

 

Please contact us at support@wattics.com if you have any difficulty with configuring your system.

 

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Anthony Schoofs

Chief Technical Officer at Wattics
Anthony drives Wattics' innovation on energy efficiency for industrial and grid environments. Anthony is also behind WSNbuzz.com, a blog covering technology advances within the smart grid and IoT markets, and was listed in 2011 amongst the top 100 IoT thinkers. Anthony was recently awarded the Globe Sustainability Research Award for his contribution to advancing knowledge on sustainability.