Jim Chookagian Specification

Listing Results Jim Chookagian Specification

Frequently Asked Questions

• What is the voltage drop across the primary winding of transformer?

  The voltage drop across the primary winding of a current transformer is normally very low. At rated primary current it is only a couple of volts and at short-circuit current a few hundred volts. If a high frequency current or voltage wave passes through the primary winding can, due to the winding inductance, high voltage drops occur.

• What information is required when ordering an IMB transformer?

  Current Transformer IMB The following information is required with your order: • Quantity • Standard/Customer specification • Frequency • Highest voltage for equipment • Rated insulation level Test Voltages • Lightning impulse 1.2/50 µs • Power frequency dry/wet • Switching surge 250/2500 µs (For Um ≥ 300 kV, wet) Currents

• What is the rated dynamic current of current transformer?

  Rated dynamic current (I dyn ) The dynamic short-time current is according to IEC, I dyn = 2.5 x I th and according to IEEE, I dyn = 2.7 x I th Reconnection The current transformer can be designed with either primary or secondary reconnection or a com- bination of both to obtain more current ratios.

• Why choose the IMB transformer?

  For revenue metering and protection in high voltage networks, the oil-paper insulated current transformer IMB is the most sold transformer in the world. • Designed for widely shifting conditions, from polar to desert climate