MINISTAB Y THREE-PHASE 400V 50/60 HZ
IREM AVRs are designed to deliver the declared power permanently (24/7) under the worst operating conditions, i.e. at full load, at minimum input voltage and max input current and at the declared ambient temperature.
3PH AUTOMATIC VOLTAGE STABILISERS Y MODELS
The voltage regulator of Y series consists in a fully electronic control circuit, a servomotor, a variable auto transformer and a series transformer (booster) on each phase.This system allows an independent regulation of the output voltage on each phase.
The control circuits are connected across the output of the regulator between phase and neutral. when the output voltage between phase and neutral varies from the pre-set value, an unbalance is detected by the control circuit: the signal is amplified and operates the servo driven motor of the variable auto transformer which gives the additive or subtractive voltage to the series transformer, necessary to have the correct output value.
The regulation of the output voltage is true RMS, therefore the voltage regulator is unaffected by possible harmonic distortion present on the supplying line. This type of voltage regulator has the advantage of having no mobile contacts or brushes in series to the line, as the regulation is directly made by the series transformers.