Power-Tronics XR8 User Manual

13
Parallel Configuration for Connection C
To use the XR8 Universal Voltage Regulator in a parallel configuration either with another generator
or with a buss such as a utility, use the diagram below for proper hookup with the XR8 configured for
Connection C.
NOTE: Power-Tronics products parallel using the Reactive Droop compensation method. This allows our products to
parallel with existing systems easily while also allowing islanded operation with the flip of a switch. When initially installing
the droop resistor, set it for approximately 7Ω before final adjustment later. If the droop is excessive when load testing,
reduce the resistance a bit at a time until satisfactory droop is achieved.
CT should be sized at 25-35VA burden!
XR8 Professional Series
Universal Voltage Regulator
120VAC
MAX
Secondary
Voltage!
100K, 2W
Unit/Parallel
Switch
Reactive Droop
Adjustment
10Ω, 100W
CT Rating:
XXX/5A @ 25-35VA
Transformer
Rating:
XXX:120V
@ 500VA
Regulator On/Off
Switch
Rate for:
Primary Voltage
@ 10A
Setup Tips:
• Isolation Transformer is
recommended for best
results even if 120/139V is
present on generator.
• Size CT as closely to rated
generator output amperage
as possible for best
paralleling results. An
oversized CT will result in
poor paralleling or loss of
control!
• If generator terminal voltage
rises, or if generator exports
VARS excessively under
load, reverse CT leads.
• If the reactive droop
resistor/rheostat gives
erratic results or
inconsistent resistance,
lightly sand the exposed
wire with 400 grit sandpaper
to improve connection
between wire and slider.

Power-Tronics XR8 Specifications

General

Brand	Power-Tronics
Model	XR8
Category	Controller
Language	English