Control Instrumentation Supplier to the South African Electrical Industry
Analogue Meters AC /DC Max Demand & Rectified
AC meters measure alternating current (AC) voltage, current, power, and frequency, displaying root-mean-square (RMS) values for accuracy. Common types include digital panel meters, analog moving-iron meters, and clamp meters for non-invasive current measurement, with typical ranges spanning 60-500VAC/50A to 1000V/1000A
DC meters measure voltage, current, and power in direct current circuits, widely used in solar PV installations, EV charging, and battery management systems. They range from portable multimeters to panel-mounted digital displays that measure ranges like 0-1000V DC and amperage via shunts. Common applications include monitoring kWh consumption, battery charging rates, and solar panel output
A maximum demand meter (MDI) measures the highest average electrical power consumption (or) of a site over a specific interval, typically 30 minutes. Used for utility billing and infrastructure, it helps manage peak load, prevents overloads, and determines penalty charges based on maximum energy demand
Meters with a moving coil and a rectifier are intended for measurement of AC currents or voltages in the frequency range from 40 Hz to 65 Hz (higher frequency range on request), where low meter consumption is required. The meters measure the mean value of rectified current or voltage. The scale is expressed in rms values at the sine form of the measured quantity. Distortion or deviation from the sine form of more than 1% entails additional errors. The scale is interchangeable. The accuracy class is 1.5.