OnLine Power Phase Stabilizer - Manual (Page 10)

On-Line Power
6002-032 REV H 1-1
SECTION 1 - OPERATION
1-1 INTRODUCTION
This manual provides installation, operation and maintenance information for the Power-Reg and Ultra-Reg
voltage regulator units as well as for the Constant Power 18 (CP 18) and Phase Stabilizer power conditioner
units. A detailed description of each product is provided in the following subsections.
All components used are of the highest quality and specifically selected to achieve the highest level of
performance. These units are UL listed and conform to National Electric Code (NEC) and Occupational Safety
and Health Act (OSHA) standards.
The Power-Reg, Ultra-Reg, Phase Stabilizer and CP 18 have tapped electronic voltage regulators. Six taps are
on each primary winding of the transformer. Each tap is controlled by a silicon-controlled rectifier (SCR) switch
and can become active at any time. Input line-to-line voltage and line current are monitored for each phase.
Peak voltage is compared with a desired reference. Depending on this comparison, the regulation logic
activates the proper SCR switch when the phase current becomes zero. This changes the primary-to-
secondary turns ratio which corrects output voltage to the desired nominal. The correction process starts in
less than one cycle. See Illustration 1-1.
REGULATED SYSTEM RESPONSE
ILLUSTRATION 1-1
CORRECTED
IN 1 CYCLE
CORRECTED
IN 1 CYCLE
POWER-REG, ULTRA-REG, CP18:
REGULATED TO +/- 3% OF NOMINAL TYPICAL
PHASE STABILIZER:
REGULATED TO +/- 2% OF NOMINAL TYPICAL
SAG
SURGE
500
480
-480
420
0
480
-480
0
INPUT
OUTPUT