R452 - Leroy Somer

Application

The R 452 regulator is of a shunt type. It is designed to fit as standard on alternators from the LSA 46.2 to the LSA 54, and is used to replace R 448 or R 449 AVRs for any application with high load impacts, leading to load reconnection difficulties for the generator set. It can be supplied with power either by a power VT, or by the AREP excitation system, or by a single-phase or 3-phase PMG.
Using the R 726 external module, the regulator can control the power factor (2F) and can match the alternator voltage to the mains voltage (3F).

Description

The electronic components mounted in a plastic casing are sealed with opaque elastomer. Connection is via 2 connectors (male ''Faston'' lugs 6.3). The regulator includes:


A main terminal block (10 terminals)
A secondary terminal block (5 terminals)
A frequency selection terminal block (3 terminals)
A droop potentiometer
A voltage potentiometer
A stability potentiometer - Integral
An underspeed potentiometer
A maximum excitation potentiometer
A LAM potentiometer
A kU/F potentiometer
A stability potentiometer - (proportional)
A stability potentiometer - (derivative)
A sensing selection jumper (Single/3-phase with an external module) - A response time jumper
A frequency selection jumper
An external voltage setting jumper
A LAM (load adjustment module) jumper
Two fuses (F1 and F2) are connected to this regulator; they are mounted in the alternator on terminal block C. Type: gG 10/38 16A 500V.