Date Code 20001006 Introduction and Specifications 1-5
SEL-351 Instruction Manual
Section 8: Breaker Monitor, Metering, and Load Profile Functions describes the operation
of:
• Breaker monitor
• Demand, energy, and max./min. metering
• Load Profile (in Firmware Versions 1 to 4)
Section 9: Setting the Relay explains how to enter settings and also contains the following
setting reference information:
• Time-overcurrent curves (5 US and 5 IEC curves)
• Relay Word bit table and definitions (Relay Word bits are used in SELOGIC Control
Equation settings)
• Settings Sheets for general relay, SELOGIC Control Equation, global, SER, text
label, and serial port settings
The Settings Sheets are single-sided and can be photocopied and filled out to set the
SEL-351 Relay. Note that these sheets correspond to the serial port SET commands
listed in Table 9.1.
Section 10: Serial Port Communications and Commands describes:
• Serial port connector pinout/terminal functions
• Communications cables
• Communications protocol
• Serial port commands
See SHO Command (Show/View Settings) in Section 10 for a list of the factory
default settings the SEL-351 Relay ships with in a standard relay shipment.
Section 11: Front-Panel Interface describes the front-panel operation of:
• Pushbuttons and correspondence to serial port commands
• Local control switches (local bit outputs LB1 through LB8)
• Rotating default displays
Section 12: Standard Event Reports, Sag/Swell/Interruption Report, and SER describes:
• Standard 15- and 30-cycle event reports
• Sequential events recorder (SER) report
• Voltage Sag/Swell/Interruption (SSI) report (in Firmware Versions 3 and 4)
Section 13: Testing and Troubleshooting describes:
• General testing philosophy, methods, and tools
• Relay self-tests and troubleshooting
Courtesy of NationalSwitchgear.com
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