7023 Compensated Current Transformer

• High-voltage bushing
• Operating voltage: up to 300 kV (line to neutral)
• Partial discharge: < 10 pC @ rated voltage
• Rated current: up to 4000 A
• Wide measurement range
• Negligible current division errors
• Burden compensation

The 7023/4000 series of high-voltage current transformers was designed for current input into MI's 300 kV Loss Measurement System. This design meets both IEC and IEEE standards for testing power transformers. The bushings contain insulating gas, and are fitted with a 4-20 mA output pressure indicator or pressure transducer for continuous monitoring. The CT's primary window winding connects through a copper bar, rated to carry currents up to 4000 A.

Operating voltage up to 300 kV and 4000 A

• The wide voltage and current operating range gives test facilities the flexibility for testing all power transformer and shunt reactor sizes with one setup.

Wide measurement range

• Provides continuous testing capability. No changing taps during the tests. High accuracy is maintained throughout the entire range.

Burden compensation

• Minimizes CT ratio errors to negligible levels. No need lead length compensation.

Partial discharge: < 10 pC

• Low level ensures the test setup has negligible impact on any measurement or where partial discharge is tested.

Operating Current Rating (at 50/60 Hz)

• 4000 A

Operating Voltage (max) (Line to Neutral @ 50/60Hz)

• 300 kV

Withstand Voltage (Line to Neutral @ 50/60Hz)

• 330 kV

Partial Discharge

• < 10 pC @ 300 kV

CT Nominal Ratio

• 2000:1

Ratio Error (for magnitude and phase shift)

• ≤ 20 ppm

Operating Temperature Range

• -5 °C to 40 °C

Operating Relative Humidity Range

• Up to 95 %, non-condensing

Operating Environment

• Indoor Use Only

Overall Height: mm | in

• 3280 | 129.1