Instrument Transformer, Div of GE 20X, 20 Data Sheet

GE

Energy Connections

Model 20 Wound Primary
Model 20X Auxiliary Transformer

Current Transformers

Frequency

50-400 Hz.

Insulation Level

600 Volt, 10 kV BIL full wave.

Continuous Thermal
Current Rating Factor

1.33 at 30 °C. amb., 1.0 at 55 °C. amb.

Terminals are brass studs No. 8-32 with
one flatwasher, lockwasher and regular
nut, for ratios up to 25:5 and 1/4-20
studs for higher ratios.

Order mounting bracket kit No.
0221B00541

Approximate weight 8 lbs.

The Model 20 is a low ratio primary current transformer, suitable for primary currents up to 50 amperes.
It is rated for metering and relaying applications. The table lists the most common current ratings. Other ratios are available.

* 1/4-20 stud terminals

Model 20X Auxiliary Transformer

ANSI Metering Class: 0.3 B1.8
The Model 20X is an auxiliary transformer for use in the secondary of main current transformers to change the ratio for metering
applications. Since the Model 20X is used in the secondary of another current transformer it has no voltage rating. It is given a 2500 volt
60Hz high potential test. It is designed to be used on circuits not to exceed 600 volts to ground or between windings.

** The circuits of up to five secondaries may be totalized. Equal or unequal line current
transformers can be summed with this transformer. Advise the ratios of the line current
transformers to be totalized for unequal ratios. Output terminals are X1-X2.

Grid-AIS-L4-ITI_Model_20-1221-2017_05-EN. © Copyright 2017. 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.