Measuring 3 phase usage with a clamp meter?

[jouleflow]

Good morning,


I have a 3 phase supply into my workshop Hager dist board. I need to measure my usage for business accounts.
My Electrician mentioned clamping around the swa cable with a ct clamp would be a simple metering option, but I'm not sure if I understood him correctly.
Is this possible, or do I need him to fit a hard wired meter.
If anyone has a solution for the uk please reply.

Thanks

Greg.

 

[Electro-tech]

Depending on what Hager DB you have, Hager does a meter that fits alongside the Main Incomer. Probably expensive. I can't see a clamp or C T's working around a shielded SWA cable. You can put a CT around each phase coupled to a remote meter.

 

[davesparks]

What size supply is coming in to the DB? This may determine whether installing a whole current meter or a CT meter would be cheaper

 

[jouleflow]

What size supply is coming in to the DB? This may determine whether installing a whole current meter or a CT meter would be cheaper

About 80A max

 

[Rockingit]

About 80A max

You can a 3ph meter for under £150 that will do this either with/out CT coil options

 

[Vortigern]

Whats wrong with your bill to monitor energy prices? Maybe your supplier can fit a monitor for you?

 

[Petej999]

Good morning,


I have a 3 phase supply into my workshop Hager dist board. I need to measure my usage for business accounts.
My Electrician mentioned clamping around the swa cable with a ct clamp would be a simple metering option, but I'm not sure if I understood him correctly.
Is this possible, or do I need him to fit a hard wired meter.
If anyone has a solution for the uk please reply.

Thanks

Greg.

Wont work due to the steel armouring on the SWA watt meter use CTs around the single cores in the DB in conjunction with a suitable wattmeter

 

[brianmoooore]

Wont work due to the steel armouring on the SWA

Wouldn't work with a CT around the whole cable even if the armour wasn't there

 

[davesparks]

Wont work due to the steel armouring on the SWA watt meter use CTs around the single cores in the DB in conjunction with a suitable wattmeter

A wattmeter will not help here, it needs a watthour meter.

 

[Electro-tech]

Or even maybe a Kilo-watt hour meter.