Instrument transformers and sensors
High-accuracy current transformer
600 V indoor or outdoor, 10 kV BIL, 60 Hertz
Primary amperes: 600 and 1000
Secondary amperes: 5
2.0 for B-0.5
3.0 for B-0.2 (for 600:5)
Class: meets 0.15% accuracy from 1% through rating factor
Available with primary bar and without primary bar
The CMF-S transformer is 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, for
example, will meter at 0.15% accuracy from 6 A - 1200 A for
extended range metering.
The CMF-S is part of ABB’s AccuRange
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.
The urethane insulating material is permanently molded
to the core and coil assembly, resulting in a compact unit with
improved mechanical, thermal, and dielectric characteristics.
Secondary terminals and cover
Large compression-type secondary terminals are supplied with
a short circuit device and a clear rectangular snap-on cover,
suitable for locking with a meter seal. This clear plastic cover
allows a visual check of connections and is keyed to a short
circuit device to ensure proper installation. Terminals also serve
as a post-type connector by looping wire under the screw head.
The base is constructed of corrosion-resistant aluminum and
secured to the encapsulated base support by four symmetrically
Extended range metering
AccuRange current transformers deliver high accuracy and sta-
ble performance over a wide load swing, making them a great
fit for variable load applications. Accuracy is guaranteed to be
0.15% from 1% of nominal current through rating factor. These
units deliver savings through improved accuracy metering and
The CMF-S has a 3.06" primary opening suited for circuits
requiring more than one cable lead. The large opening can
accommodate the conductors required for full current capacity,
even at high rating factors. The opening is large enough to ac-
commodate four 500 MCM or three 750 MCM insulated cables.
A removable primary bar can be supplied with either a slot-hole
or 4-hole NEMA pattern.
Test reports are stored electronically and can be e-mailed in
various formats at the time of shipment.
This unit can be tested to all applicable IEEE, CSA, or IEC stan-
dards as requested. This unit is tested in accordance with IEEE
C57.13.6-2005 for high accuracy instrument transformers.
Note: dimensions are in inches and [mm].
FOR #14 TO #3 WIRE
(approximate weight 8.5 lbs)
FOR POTENTIAL TAP FOR #14
TO #6 WIRE
Primary Rating factor
No primary bar
With primary bar
Bar-type (top view)
(approximate weight 10.5 lbs)
FOR #14 TO #3 WIRE
For more information please contact:
Medium Voltage Distribution Components
3022 NC 43 North
Pinetops, NC 27864
Phone: +1 252 827 3212
+1 252 827 4286
Bar-type (side view)
HOLES FOR #10 SCREW
The information contained in this document is for general information purposes
only. While ABB strives to keep the information up to date and correct, it makes
no representations or warranties of any kind, express or implied, about the
completeness, accuracy, reliability, suitability or availability with respect to the
information, products, services, or related graphics contained in the document for
any purpose. Any reliance placed on such information is therefore strictly at your
own risk. ABB reserves the right to discontinue any product or service at any time.
Copyright 2012 ABB.
All rights reserved.
1VAP428182-DB April 2015 Rev. I