Diversified Electronics CT Series Data Sheet

OPERATION

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The CT Current Transformers are of the inserted primary type with the
secondary toroidally wound over a core of oriented electrical steel. The
windings are carefully insulated. The entire transformer is then dipped in
PVC insulation compound which insures maximum protection against
moisture, acids, alkaline, oils and abrasive particles. The securely fastened
24” 14 AWG leads are identified to the extent that the secondary current
leaving the CT through the white lead is in phase with the primary cur­rent when the primary conductor enters the CT from the side identified
by the black dot. To prevent shock and transformer damage, it is impor­tant that the secondary leads always form a continuous circuit when the
current is flowing in the primary.

An External CT may be used to extend the range of the AC Current Monitors.

DIMENSIONS (INCHES)

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SEE CHART

• 600 Volt Insulation

• 25 - 400 Hz Operation

• 25/5 to 2500/5 Amperes

• Optional Mounting Bracket (Add Suffix-B to part number)

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GROUP

SIZE

1
2
3
4
5

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A B C I II III IV

1-1/4 3-3/4 2-3/4 5-1/4 4 2-1/8 0.281 x 0.5
1-1/4 3-7/8 1-1/4 4-1/2 3-7/8 7/8 0.250 x 0.375
1-1/4 3-1/2 1-1/4 4-1/2 3-7/8 7/8 0.250 x 0.375
1-7/8 4 1-1/4 4-1/2 3-7/8 7/8 0.250 x 0.375
3-3/8 6-1/2 1-11/16 7-7/8 6-1/2 1-1/8 0.281 x .5

WIRING

SPECIFICATIONS

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MODEL RATIO CAPACITY ACCURACY

CT-25/5 25/5 2 V.A. 6.00% 1 3 lb. 5 oz.

CT-50/5 50/5 2 V.A. 6.00% 2 1lb. 6 oz.

CT-100/5 100/5 2 V.A. 3.00% 3 1lb. 4.5 oz.

CT-200/5 200/5 2 V.A. 1.50% 3 15 oz.

CT-500/5 500/5 2 V.A. .60% 3 1 lb. 1 oz.

CT-1000/5 1000/5 2 V.A. .30% 4 3 lb.

CT-2500/5 2500/5 5 V.A. .10% 5 3 lb. 4 oz.

NOTES:

1. The current ratio in the table is the ratio of current in the pri­mary/secondary with one turn on the primary. The ratio can be
increased by adding turns on the primary.

2. The transformers may be installed at some distance from the
load. However, the interconnecting conductor resistance must
not cause the VA rating of the transformer to be exceeded.

3. CTs should not be operated at twice the rated currents. For
example, CT-25/5 should not operate above 50/10 amps. With
current too high overheating will occur.

GROUP

SIZE

WEIGHT

// CT Series

Current Monitors

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