Current transformers for meters
Metering CTs for energy meters with CT connection · 1 A or 5 A secondary
37 types for energy meters with CT connection, 1 A – 6000 A primary, 1 A or 5 A secondary – with the matching CT-operated meters below. Class 0.2, 0.2 S, 0.5, 0.5 S, 1 to 3, rated output 0.2–60 VA.
Products
Matching CT-operated meters (7)
DMC6 MID and ECM6 MID connect to the secondary side of the transformers; the ratio is set on the meter. ECM6 MID: class B to EN 50470-3.
Frequently asked questions
How do I match transformer and meter?
Secondary current equal to the current input of the meter (1 A or 5 A), primary current just above the highest operating current, ratio set on the meter. A three-phase meter needs three transformers of the same ratio, one per phase. Choosing a current transformer →
Which class for a meter?
For billing third parties the metering point operator sets the class and the transformers must be calibrated. For monitoring and cost centres class 1 is usually enough, with a lot of partial load class 0.5 or 0.5S. Accuracy classes →
What do I need for billing?
Calibrated (conformity-assessed) transformers and an MID meter – in the shop the ALO-E and WALO-E series with the CT-operated meters DMC6 MID or ECM6 MID. Calibration and MID →
How much rated output does the transformer need for a meter?
Meter consumption plus the loss of the measuring lead – the VA calculator works it out from lead length and cross-section. VA calculator →
One meter for several feeders?
A summation current transformer adds the secondary currents of 2 to 9 main transformers into one 1 A or 5 A output for a single meter. Summation current transformers →
Overview, buying guide and all designs: Current transformers