Type 2J4-4 Transformer Set
The Type 2J4-4 Uniload Voltage Transformer Test Set is generally
used in combination with the Type KVTS Voltage Transformer Testing
System in accuracy testing of voltage transformers. Transformers with primary ranges
from 120 through 14,400 volts can be tested. When combined with the Type
2J6 Transformer Set, this can be extended to 36,000 volts.
The Type 2J4-4 Uniload Voltage Transformer Test
Set shall consist of three major parts, as follows:
A Type WP-14000-4 Precision Multirange Voltage
Transformer Standard with primary ranges of 120; 240; 288; 300; 480; 600; 2,400; 4,200;
4,800; 7,200; 8,400; 12,000; and 14,400 volts. Secondary: 120 volts.
A Type LP-14000-4 Heavy-Duty Supply Transformer
(similar in size and appearance to the WP-14000-4).
A rubber-tired carriage which supports the
WP-14000-4 and LP-14000-4 and provides mobility to the complete Uniload Test Set.
For convenience and safety, a connection
arrangement which prevents incorrect connections during tests shall be used for selecting
the proper voltage range on the supply transformer and the precision standard.
The Type LP-14000-4 Supply Transformer shall mount
on top of the Type WP-14000-4 Voltage Transformer, with an interlocking feature for
rigidity. Handles shall also be provided on each transformer for an added convenience
should one wish to use the transformers separately and away from the carriage.
B. Accuracy and Burden
When the Type WP-14000-4 Precision Standard
Transformer is used with its calibrated secondary burden the ratio of this voltage
transformer shall be well within ±0.02% and the phase angle shall be well within ±2
minutes. The transformer shall be wound so that it has practically the same ratio and
phase angle accuracy on all ranges.
The transformer standard shall be able to be
calibrated by itself without a standard of comparison by means of the Knopp One-to-One
D. Dimensions and Weight
The equipment shall measure approximately 23 in.
(58.4 cm) Wide (not including handles), 15 in. (38.1 cm) Deep, and 40 in. (101.6 cm) High.
The net weight shall be approximately 500 lbs. (226.8 kg).