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• R180 AVR Automatic Voltage Regulator 1 INTRODUCTION The R180 is a fully solid-state automatic voltage regulator (AVR) which is used for excitation of a brushless alternator powered via a Permanent-Magnet (PMG) exciter or by way of auxiliary windings It takes a 1 and 5A signal from a slump current transformer in U part to offer a voltage stoop which allows the alternator to function in parallel The R180 has an adjunct input, which might be used as a distant potentiometer terminal when connected to a 1 KΩ potentiometer or takes ± four DC with a purpose to exchange the terminal voltage It has an below frequency voltage roll-off function to stop alternator overfluxing within the event of underspeed operation The AVR has a potentiometer for atmosphere the knee-point for only frequency roll-off and a 50Hz/60Hz alternative jumper This jumper makes it easy to choose the AVR frequency for a 50Hz/60Hz alternator 2 TECHNICAL SPECIFICATIONS 1 Sensing enter 3-ph/2-ph - 220/230/240/380/400/415 volts for fifty Hz 3-ph/2-ph - 208/240/277/380/416/440/480 volts for 60 Hz 2 Voltage vary high 300V to 530V three Voltage vary low 180V to 310V 4 Droop 1 and 5A AC in U part five Droop vary 8% stoop at 0 PF 6 AC supply Voltage 277 VAC rms ± 10% Frequency 50/60 Hz - PMG 240 Hz 7 Excitation recent 6A DC continual 9A for 5 seconds (short-circuit operation) 8 Regulation ± 0% at AVR sensing terminals 9 Maximum excitation restrict 6A DC (factory setting) 10 Maximum excitation restrict delay 30 sec (factory setting) 11 Under frequency protection 48 Hz/58 Hz for fifty Hz/60 Hz operation 12 Slope 1 (120%) V/Hz 13 Remote potentiometer 1k Ohm for ± 10% adjustment 14 Accessory Input ± 4 DC for ±15% 15 Loss of sensing Shuts down after 5 sec when sensing open

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