vii
Date Code 20100129
Instruction Manual
SEL-751A Relay
Preface
Safety and General Information
The following figure shows the LED location specific to the SEL-751A (see
for the complete rear-panel drawing).
SEL-751A LED Locations
i4333a
Fiber-Optic Serial Port LED
Arc-Flash Detection LEDs
for Self-Test
Fiber-Optic Ethernet
Port LEDs
LED Safety Warnings and Precautions
➤
Do not look into the end of an optical cable connected to an
optical output.
➤
Do not look into the fiber ports/connectors.
➤
Do not perform any procedures or adjustments that are not
described in this manual.
➤
During installation, maintenance, or testing of the optical
ports only use test equipment classified as Class 1 laser
products.
➤
Incorporated components such as transceivers and laser/LED
emitters are not user serviceable. Units must be returned to
SEL for repair or replacement.
Summary of Contents for 751A
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