GE
Grid Solutions
Model JCM-0C
Indoor Current Transformer
600 V, 10 kV BIL, 200 & 400 A With Integral Primary Bar
Application
Designed for indoor service. Designed to provide high accuracy in applications with high
metering secondary burdens. Suitable for operating meters and instruments, on both
single-phase two-wire circuits and polyphase circuits.
Weight
(Approximate)
Transformer, without base 5.8 lbs
Low base, add 0.25 lbs
High (EEI) base, add
Insulation Level
0.6 kV; BIL 10 kV full wave
1.0 lbs
Frequency
50-60 Hz
Reference Drawings
Outline 0121C33704
JCM-0C Dimensions
thermoplastic polyester resin. This tough material has excellent electrical
evenly distributed around the core for maximum accuracy and resistance
Secondary terminals are tin plated brass, compression type with a 0.275”
Construction and Insulation
The core and coil are enclosed in a case molded with GE Valox
and mechanical properties over a wide temperature range, has low
water absorption and is resistant to oil and a variety of chemicals.
Core and Coils
The core is made from high quality grain oriented silicon steel, annealed
under rigidly controlled factory conditions. The secondary winding is
made of heavy enameled copper wire. The secondary windings are
to stray fields from adjacent conductors.
Terminals
diameter cross-hole for wiring and a 1/4-28 clamp screw. A shorting
device is provided and interlocked to the terminal cover. The terminal
cover is made of a clear plastic. Provision is made for sealing the cover.
Polarity
The H1 polarity mark is molded into the case, above the win- dow at one
end. The X1 polarity mark is also molded into the case adjacent to the
secondary terminal. Both H1 and X1 are also marked with white dots.
Primary Bars
Formed from copper tube, they are tin-plated. They are non-removable
and have a potential connector that can be attached above or below the
bar at either end. Primary bars conform to ANSI C12.11.
Nameplate
The nameplate is laser engraved aluminum. It is attached to the top of
the unit and has provision for attaching the user’s identifying tag. The
nominal current rating is marked on both faces of the unit in large
numerals.
Mounting
The transformer can be mounted in any position and may be suspended
from the bus-bar or cable. It has provision for attaching two optional
bases. Bases are made from stainless steel. The high base increases the
transformer height by 2 inches and meets the dimensions specified in
ANSI C12.11.
Maintenance
These transformers require no maintenance, other than occasional
cleaning, if installed where air contamination is severe.
ITI-Model-JCM-OC-Spec-EN-2018-01-Grid-AIS-1398. © Copyright 2018. General Electric Company
and Instrument Transformers LLC reserve the right to change specifications of described products
at any time without notice and without obligation to notify any person of such changes.
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