JLD series combined transformer

The combined transformer is used to separate the protection and measurement device from high voltage, and convert the current and voltage to be measured on the high voltage line into a power device with a certain accuracy of the current and voltage signals for the protection and measurement device.

Product features:

Small volume: the volume is basically consistent with the same grade current transformer;

Good anti-ferroresonance performance: The voltage part adopts a new type of open T-type core to avoid the occurrence of ferroresonance;

Excellent anti-lightning impulse and system overvoltage performance: The voltage primary coil is divided into multiple line segments and connected in parallel with the capacitive screen inside the main insulation to increase the longitudinal capacitance of the primary winding and improve the product's ability to withstand lightning impulse overvoltage and system overvoltage;

Low product temperature rise: the primary winding is relatively thin and high compared with the traditional structure, the total heat dissipation area is large, the product temperature rise is low, and the product performance is reliable;

The product covers a small area and reduces the substation investment.

Product parameter