Busbar Shunts

General Details

Busbar Shunts

Busbar Shunts designed for switchgear applications. High accuracy at +/- 0.25%. Busbar Shunts have multiple blades for a cooling effect and can be mounted directly to a bus bar.

Typical applications include battery chargers, electroplating, heavy industry, mining, solar generators, and wind power.

Available options include Certificates of Calibration or Certificates of Conformance, if required.

Advantages of Direct current (DC) instrument shunts are that the units are used to extend the range of ammeters whenever the current to be measured is too large to be passed through the instrument–usually currents over 50 amperes. The DC shunt, therefore, is a diverter which is used to “shunt” the majority of the current around the indicating instrument. Essentially, the DC shunt is a specially-designed resistor which delivers a millivolt output (to a millivolt meter or instrument) in proportion to the current flowing through the resistor.

The Crompton Instruments product range represents one of the largest product offerings of power measurement, control, and protection instrumentation, for switchgear and generator set manufacturers, panel builders and OEMs.

Crompton Instruments products offer proven reliability across a diverse array of industries including power generation, process control, test and measurement, utility, marine, defence and energy management applications. To meet the challenges of ever decreasing lead times and industry developments, design and manufacturing processes are constantly reviewed and updated.

By combining local knowledge with over 100 years of research, product development and manufacturing capabilities, Crompton Instruments products provide the highest standards of performance and user convenience


  • Accuracy ±0.25%
  • Designed for Switchgear applications
  • Heat is conduced away from the blades to the terminal blocks and to the bus bar
  • Low resistance contact with the bus bar
  • Mounted directly to a bus bar
  • Multiple Blades allow for cooling



  • None (DC Shunts cannot have any approval as they are not Stand Alone Units- they must be used together with a Meter)



Busbar Shunts

Type A – Solid End Block – 1,5000 to 6,000 Amps, 50 or 100 mV DC

A model


Busbar Shunts

Type R – Multi Fin Design – 1,000 to 2,000 Amps,  50 or 100 mV DC

R model


Busbar Shunts


Type H – Multi Fin Design – 2,500 to 30,000 Amps, 50 or 100 mV DC

H model


Type K Shunt

Type K – Multi Fin Design – 600 to 10,000 Amps, 50 or 100 mV DC

K model


Type M Shunt


Type M – Single Fin Design – 300 to 1,000 Amps, 50 or 100 mV DC

M model


Type G Shunt

Type G – Multi Fin Design – 3,000 to 10,000 Amps, 50 or 100 mV DC

G model



Busbar Shunts

Busbar Shunts

  • None (DC Shunts cannot have any approval as they are not Stand Alone Units- they must be used together with a Meter)