Specifications

BE3-GPR
(Request bulletin UEG)
Features
PROTECTION
Stand-alone Generator Version:
• Under/Overvoltage: 27/59
• Under/Overfrequency: 81O/U
• Underfrequency: 81U
• Neutral Ground Fault: 51N or Three Phase Time Over-
current with Voltage Restraint: 51/27R
Paralleled Generator Version:
• Adds Reverse Power (32R)
Optional Protective Functions:
• Sync Check with Dead Bus (25)
• Loss of Excitation (40)
• Phase Balance (47)
PROGRAMMABILITY
• Front panel LCD display and pushbuttons
• Basler BESTCOMS software
• Output contacts can be programmed to energize or
de-energize to trip
• Trip, Reset, and Time delays for each function can be
programmed
INPUTS
• Available reset input allows relay to automatically reset
when fault goes away or to maintain output until an
input is received.
• A disable input contact disables the relay to avoid
nuisance tripping during generator build-up.
WATCHDOG TIMER
• Monitors microprocessor
• Energizes output relay if problem occurs
COMMUNICATIONS
• Send or receive ASCII characters in serial data format
• Communicate with PC running terminal emulation
setup program
• Basler BESTCOMS software is available for enhanced
HMI communications and metering of generator
parameters.
Functional Description
The BE3-GPR Generator Protective Relay offers multiple
protective features in a single economical package. Its micro-
processor-based design provides high accuracy, reliability, and
repeatability through exact set point adjustment and precise
generator system protection.
•Low sensing burdens mean that the BE3-GPR does not
require dedicated VTs and CTs.
•Optional protection features allow for customizing the
BE3-GPR to meet individual system requirements.
•One set of three phase current and voltage sensing inputs
provides all common protective functions except
generator differential, 87G. The voltage sensing circuits
may be configured internally for three-phase three wire,
three-phase four wire, or single-phase circuits. A fourth
voltage input for bus voltage is optional.
•Each protective function is brought out to its isolated
Form C output contact.
•The BE3-GPR is extremely easy to set up from the front
panel or with an IBM compatible PC.
•The LCD display makes calibration quick, easy, and
accurate without the need to bench test the relay to verify
settings.
•Mounting configuration choices include semi-flush and
behind the panel.
Application
The BE3-GPR Generator Protective Relay meets utility
grade specifications and is suitable for any generator applica-
tion, as well as many utility and cogeneration facility intertie
applications. It offers a limited number of precision settings to
make setup fast, easy, and accurate.
4 BE3 PROTECTIVE DEVICES
16