BECKWITH ELECTRIC M-2601, Instruction Book

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Introduction – 1
1–1
1
Introduction
1.0 Description ................................................................................ 1–1
1.1 Accessories ............................................................................... 1–2
1.0 Description
The Beckwith M-2601/02/03 Series of Autodaptive
®
Regulator Controls (ARC) are unique
microcontroller-based solutions to regulator control
requirements. Using conventional inputs, the control
accomplishes regulator control, based on voltage.
The unit has a user-defined Bandcenter and
Voltage Regulation Quality Factor (VRQF) that
permits optimization of the tapchanging process,
as well as a variety of configuration setpoints to
allow maximum flexibility.
The ARC senses voltage and current which permits
the control of voltage through the regulator. The
control utilizes nonlinear integrating algorithms
which adapt to system operating conditions to
reduce the number of tapchanger operations while
maintaining the desired VRQF.
The ARC is protected from noise and transients
likely to be found in typical regulator control
applications. The control is designed to withstand
the application of 1500 V ac for one minute between
any terminal and ground connection, and meets
or surpasses the requirements of ANSI/IEEE
C.37.90.1-1989, which define surge withstand
capability.
Interrogation of the control and setting changes
are made through an optically-isolated RS-232
communications port mounted on the front of the
unit. Using the M-2802 SLIMcom™
software, with
a computer running Microsoft
®
Windows 95/98,
the user can configure and monitor operation of
the unit. Two passwords are available to the user
and are accessed through the communications
port. All setpoints are stored in nonvolatile memory
which is unaffected by control voltage disturbances.
Two operation counters are provided. One counter
may be reset; the other may be preset. The control
has adjustable bandcenter, over and undervoltage,
runback, and line drop compensation.
Nine LEDs are used to indicate Regulator RAISE
and LOWER
(Fast, Intermediate and Slow)
command status, CPU OK, REV PWR, and
NEUTRAL LIGHT.
The basic control settings allow regulation of the
voltage at a remote location while assuring that
the customer nearest the regulator is protected
against overvoltage.
The control has a VT User Correction Voltage
setting, and the capability to correct for current
transformer and voltage transformer phasing
connections without making wiring changes. This
feature allows phase angle corrections in 30°
increments from 0° to 330°.