Primary current injection ( ZC-102F )
1. Test set for current supply and measurement
2. Used during commissioning if high accuracy is not required
3. Currents up to 1000 A
4. Insufficient for high-accuracy metering CTs > Sensitive to transient distortion if line frequency test signals are being used
5. ~ 30 kg / 66 lbs
6. Rewiring is required between single tests (for example, ratio, polarity, saturation, winding resistance) > Results must be assessed manually
Primary nominal current injection( ZCHG-12 )
1) Reference transformers and measuring bridges
2) Used in factories, calibration laboratories and on-site mounted on a test truck
3) Performed with very high currents (nominal and overcurrent magnitudes)
4) High accuracy
5) ~ Two tons of equipment
6) The heavy equipment requires several people to set up and perform the test
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