AC Current Amplifier ES/ESM
ESM 500 (500 VA) current amplifier shown in table-top case
Typically, the ES/ESM series of current amplifiers operates over the frequency range 15 Hz to 1500 Hz, depending upon model. The standard amplifiers are available with output power up to 3 kVA, although larger models are available on request.
Typical applications for these amplifiers include:
- Testing thermal trip characteristics of circuit breakers
- Testing of trip characteristics of fuses
- Testing magnetic trip characteristic of circuit breakers
- Calibration and testing of ammeters, powermeters etc.
Complex mains simulation systems involving simulation of line currents AND line voltages across multiple phases (e.g. for testing of power line protection devices such as Distance Protection Relays for the electricity supply industry)
The nominal output power of the ES/ESM-series of current amplifiers can be realised with load power factors from 0.7 (inductive) - 1 - 0.7 (capacitive). The extensive use of negative feedback means that the harmonic distortion, phase shift between output & input and output load regulation are all extremely well specified.