9328900990 Rev L BE1-951 Introduction i
INTRODUCTION
This instruction manual provides information about the operation and installation of the BE1-951
Overcurrent Protection System. To accomplish this, the following information is provided:
• General information, specifications, and a Quick Start guide.
• Functional description and setting parameters for the inputs and outputs, protection and control
functions, metering functions, and reporting and alarm functions.
• BESTlogic programmable logic design and programming.
• Documentation of the preprogrammed logic schemes and application tips.
• Description of security and user interface setup including ASCII communication and the human-
machine interface (HMI).
• Installation procedures, dimension drawings, and connection diagrams.
• Description of the front panel HMI and the ASCII command interface with write access security
procedures.
• A summary of setting, metering, reporting, control, and miscellaneous commands.
• Testing and maintenance procedures.
• Description of BESTCOMS graphical user interface (GUI).
• Appendices containing time overcurrent characteristic curves and an ASCII command-HMI cross
reference.
Optional instruction manuals for the BE1-951 include:
• Distributed Network Protocol (DNP) 3.0 (9328900992)
• Modbus™ (9328900991).
WARNING!
To avoid personal injury or equipment damage, only qualified personnel should
perform the procedures in this manual.
NOTE
Be sure that the relay is hard-wired to earth ground with no smaller than 12 AWG
copper wire attached to the ground terminal on the rear of the unit case. When
the relay is configured in a system with other devices, it is recommended to use a
separate lead to the ground bus from each unit.
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