CMF Current Transformer Metering 0.6 kV
CMF: 600 volt, indoor or outdoor, 10 kV BIL, primary amperes: 50-1200, 25-60 Hz
CMF-S: 600 Volt, indoor or outdoor, 10 kV BIL, primary amperes: 1000 class: 0.15S B-0.5 (IEEE 0.15S class metering accuracy) 60 Hz
CMF
The CMF transformer is used with watt-hour meters, with or without thermal demand attachments. Applicable to single or polyphase low voltage circuits, both single and dual ratio units are available. Many ratings feature high rating factors of 3.0 or 4.0 for broad band metering. A wide range of ratings and accessories (single and dual ratings, high rating factors, primary bar assemblies, and high base) reduce inventory cost and increase application flexibility.
CMF-S
The CMF-S transformer is also used with watt-hour meters, with or without thermal demand attachments. Applicable to single or polyphase low voltage circuits, a single 600:5 ratio unit will perform at the 0.15S metering class from 30A to 1200A for extended range metering. The CMF-S is part of ABB’s AccuRange® current transformer portfolio, transformers that reduce inventory requirements and significantly improve metering accuracy. These units are especially important for metering installations with large variable loads in commercial and industrial applications.