Wound primary current transformers

Wound primary current transformers have their own primary winding with terminals: the current to be measured flows through the winding instead of through a window. This allows small primary currents from 1 A to 40 A to be measured accurately – as WALO for metering and as calibrated WALO-E for billing.

from Thu 29/10

WALO

1 A – 40 A

from €97.91incl. VAT

from Fri 06/11

WALO-E

1 A – 40 A

from €160.41incl. VAT

WALO or WALO-E?

Type	Primary current	Secondary	Class	Rated output	Application
WALO	1 A – 40 A	1 A, 5 A, 333 mV	0.5 or 1	1.5 – 5 VA	operational metering, energy monitoring
WALO-E	1 A – 40 A	1 A, 5 A	0.5 (calibrated)	1.5 – 5 VA	billing to third parties

Frequently asked questions

What is a wound primary current transformer?

A current transformer with its own primary winding and primary terminals. The measured current flows through this winding, so the transformer measures even small currents from 1 A accurately.

Is there a calibrated version?

Yes, the WALO-E is conformity-assessed (class 0.5, secondary 1 A or 5 A) and suitable for billing to third parties.