Just like the TOPACC, the TOPACC-HC is our top line precision current measuring system for high currents up to 30000 Amperes in both directions, based on the zero-flux principle. This system has also our famous burden resistor built at Hitec Power Protection for the excelent specifications.

Qualities of the TOPACC-HC:

• Available for currents up to 30000 ADC bipolar
• Four-wire  output for minimum distortion by the load circuit
• Small signal bandwidth 500 kHz
• Output voltage of 10 Volt at customer specified rated primary current
• High stability and accuracy
• Temperature coefficient of 0.7 ppm/K
• Linearity better than 2.5 ppm
• Unique peak detection method to ensure perfect operation under all circumstances
• Saturation detection circuit with automatic reset
• Zero-current detection and output valid signalling
• Optional uninterrupted operation through power failures up to 200 mili sececonds
• Can be switched on with main current already present
• No warming-up time