3 Phase and Single Phase Setup guide

It is possible to setup three phase and single phase assets on the same Eniscope, please see below example guide:

So in this example, we want to monitor:1) Main Incomer (3phase)2) Walk-in Freezer (3phase)3) Cookline (3phase)4) Lights (single phase)5) Fridge (single phase)6) AC (single phase)7) Heater (single phase)

In order to do this, we wire the voltage reference as "Three Phase":

Physical installation

The Voltage reference on the Eniscope comprises of L3, L2, L1, N

So the wiring is a normal 3phase reference.

Now comes the important part:

L1 on the Eniscope (phase 1) is linked to position 1 on each RJ12 cable plugged into a meter, L2 (phase 2) is linked to position 2 on each RJ12, and L3 (phase 3) is linked to position 3 on RJ12. 

Going back to our basic principles we know Three power from the grid is provided with each phase coming in 120 degrees from the (360degrees total) other so it is important that the single-phase assets you wish to monitor are referenced to the correct phase otherwise calculated values other than current will be wrong. 

For example, the Power equation is based on:

So having the correct phase reference is essential as the phase angle affects all calculated values.

So if the single-phase asset is powered from the main incomer phase 2 wire, then the CT placed on the asset wire can only go to position 2 on any free metering points of the RJ12. If we put it on point 1/3 on the RJ12 are values other than current/voltage will be incorrect due to different phase angles.

Let's return to our Main example:

Lights powered from L1 (phase 1) of the main incomer

Fridge powered from L2 (phase 2) of the main incomer

AC powered from L3 (phase 3) of the main incomer

Heater powered from L2 (phase 2) of the main incomer

So for Lights, we can use RJ12 position 1 on any meter free to monitor.

But we cannot use positions 2 or 3 as these are linked to phases with different angles causing incorrect values.

And again for the Fridge, we can use position 2 of any RJ12 that is free but not 1 or 3

So now we understand the requirements we can plan the installation order:

Eniscope:

Meter 1 RJ12 = 3phase Main incomer (all positions used)

Meter 2 RJ12 = 3phase Walk in Freezer (all positions used)

Meter 3 RJ12 = 3phase Cookline (all positions used)

Meter 4 RJ12 position 1 = Lights

Meter 4 RJ12 position 2 = Fridge

Meter 4 RJ12 position 3 = AC

Meter 5 RJ12 position 1 = Empty

Meter 5 RJ12 position 2 = Heater

Meter 5 RJ12 position 3 = Empty

Once physically installed you can now setup the Eniscope hub metering point.

Eniscope Hub settings

For the Eniscope Hub, you only need to set the Meters 'Phase Configuration' to "Three Phase" during setup (we can create single-phase data views in Admin at a later stage). Select single phase or 2 phase forces the remaining phases to zero (i.e. single phase selection forces phase 2&3 readings all to zero in device readings), we don't want to lose valuable metering point options so keep to 3phase. Also give a good descriptive name to explain each Metering point and CT in use.

Note: the CTs per meter must all be the same size. You can not for instance have RJ12 positions 1 and 2 as 30A and position 3 as 60A.

Returning to our example:

We can see all meters have been added and a good descriptive name to explain each CT and meter.

Admin.eniscope.com

Add Equipment

Although only for reference, we recommend that you fill in 3 Phase in the "advanced configuration" box, this allows you to keep record of the CT sizes used onsite during the install.

Also be sure to give a good descriptive name for each metering point you add clearly stating which CT refers to which asset.

Returning to our example:

We can now see all 5 meters added and named clearly so we know what CTs are in use.

Add Dataview

For the data view single-phase setup, you need to select the 'CT1' option. Then repeat for CT2 and CT3 (so you have 3 data views for 3 single phases).

If the meter is a 3phase device: you need to select the 'System' option.

Returning to our example:

We can now see data views set up for our example.

Take note the sections in red which clearly reference the single phase position or if 3phase for each dataview.

You now have all the important settings for setting up single and 3phase circuits for view in analytics.