Energy & Current

An energy meter measures both Current and Voltage to calculate Power and Energy. Sometimes it is sufficient to only measure the current, for example to monitor the on/off state of a piece of equipment, or to monitor for faults.


Common applications are:

  • Runtime monitoring – keep track of equipment usage and performance

  • Fault detection – monitor for broken light bulbs or unusual load conditions

  • Slave control – let the on/off state of one machine control other equipment

  • Diagnostics – estimate power usage on known loads

Electrical current can be measured in two ways; using a shunt or measuring the magnetic field.

> Shunts

> AC current sensing with a CT

> DC current sensing with a CT

> Non electrical/Mechical current (fluid/gas)


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