Nameplate Marking Of Voltage Transformers

The voltage transformer model consists of the following parts, with letters and symbols representing the content:
First letter: J - Voltage transformer;
The second letter: D - single-phase; S - three-phase
The third letter: J - oil immersion; Z - pouring;
Fourth letter: Number - Voltage level (kV).
For example, JDJ-10 represents a single-phase oil immersed voltage transformer with a rated voltage of 10kV.
The rated primary voltage is the primary voltage value used as the performance reference for the transformer.
The rated secondary voltage is the secondary voltage value used as the performance reference for the transformer. Rated transformation ratio, the ratio of rated primary voltage to rated secondary voltage.
Accuracy level, determined by the transformer system, whose error should be within the specified limit under specified usage conditions. The impedance of the secondary circuit is usually expressed in apparent power (VA). Rated load, the load value that can be used to determine the accuracy level of the transformer.