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Date Code 20081022 Instruction Manual SEL-787 Relay
Preface
Safety and General Information
The following figure shows the LED location specific to the SEL-787 (see
Figure 2.9 for the complete rear-panel drawing).
LED Location Specific to the SEL-787
Environmental
Conditions and
Voltage Information
The following table lists important environmental and voltage information.
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.
PORT 2
T
PORT 1A PORT 1B
Fiber-Optic (LED) Ports
Condition Range/Description
Indoor/outdoor use Indoor
Altitude Up to 2000 m
Temperature
IEC Performance Rating
(per IEC/EN 60068-2-1
and IEC/EN 60068-2-2)
–40 to +85°C
UL/CSA Safety Rating
–40 to +70°C
Relative humidity 5 to 95%
Main supply voltage fluctuations Up to ±10% of Nominal voltage
Overvoltage Category II
Pollution Degree 2
Atmospheric pressure 80 to 110 kPa
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