内容提示: ©2006 Newage International Limited 1 TD_AS440 AVR_07.06_01_GB AS440 AUTOMATIC VOLTAGE REGULATOR (AVR) SPECIFICATION INSTALLATION AND ADJUSTMENTS General description AS440 is a half wave phase controlled thyristor type AVR and forms part of the excitation system for a brush-less ...
threshold. A manual adjustment is provided for factory setting of the under frequency roll off point, (UFRO). This can easily be changed to 50 or 60 Hz in the field by push-on link selection. Over excitation conditions are limited to a safe period by a protection circuit within the AVR....