Holt Model HCS-1 P/N ...50 amp alternating current shunt HCS-1 AC Shunt Set 84506 Thermo Voltage Converter 100 Amp AC Shunt Contact Holt Instrument Return to Home Page The Model HCS-1 is a primary standard shunt resistor designed for the accurate measurement of altemating currents in the frequency range from 50Hz to 1OKHz. It utilizes the triaxial construction used in the Holt HCS-1 shunt series to enable the user to route the potential leads of the measurement system in space which is competely free of the magnetic fields of the current Circuit. The four terminal impedance of the HCS-1H shunt resistor is approximately 2 milli ohms at DC rising typically 1.0% at 50 KHz. An auxiliary compensation unit PIN 886847 may be used with the HCS-1 shunt to provide an effective 4 terminal transfer impedance to 1 milli ohm +/- 0.1%. See below for the technical specifications of the 96846. MODEL HCS-1 P/N 50 Amp AC Shunt TECHNICAL SPECIFICATIONS Current Range:  20 to 100 amps Frequency Characterisitics:  When used with the compensation box, the maximum AC-DC difference at any frequency from 60Hz to 10KHz will not exceed 1%. Input impedance:  Less than 7 milli ohms at D.C. and less than 20 milli ohms at 20KHz. Connectors:  Current Terminals: Superior Electric Type PP100G 5/16 Diameter Pins mounted on with center-to-center spacing adjustable. Physical: Per Dwg #96846 Accessory:  Compensation Unit P/N 86847 Connectors:  Input UHF female, Output UHF male coaxial Transfer Impedance:  This unit is adjusted to match a particular 50 amp shunt Model HCS-1H and is serial number coded to that shunt. The transfer function is E0 = 0.001 lin (1 +/- 0.25%) to 1OKHz. Calibration Data Supplied:  Four terminal resistance at 100Hz and the frequency response referred to 100 Hz for the following frequencies and currents. The correction factor for the shunt does not exceed the magnitude shown below. FREQUENCY Current Amps 1KHz 2KHz 10 KHz 30 +/- 0.04% +/- 0.8% +/- 0.25% 50 +/- 0.04% +/- 0.8% Specifications subject to change without notice. Click to return to top