xxii
SEL-787 Relay
Instruction Manual
Date Code 20081022
Preface
Safety and General Information
Wire Sizes and
Insulation
Wire sizes for grounding (earthing), current, voltage, and contact connections
are dictated by the terminal blocks and expected load currents. You may use
the following table as a guide in selecting wire sizes.
You should use wire with 0.4-mm thick insulation for high voltage
connections to allow for contact between adjacent wires. If possible, use
0.4-mm insulated wires for all connections.
Instructions for
Cleaning and
Decontamination
Use a mild soap or detergent solution and a damp cloth to carefully clean the
SEL-787 chassis when necessary. Avoid using abrasive materials, polishing
compounds, and harsh chemical solvents (such as xylene or acetone) on any
surface of the relay.
Technical Assistance
Obtain technical assistance from the following address:
Schweitzer Engineering Laboratories, Inc.
2350 NE Hopkins Court
Pullman, WA 99163-5603 USA
Phone: +1.509.332.1890
Fax: +1.509.332.7990
Internet: www.selinc.com or selindustrial.com
E-mail: info@selinc.com
Connection Type
Minimum Wire Size
Maximum Wire Size
Grounding (Earthing) Connection
18 AWG (0.8 mm
2
)
14 AWG (2.5 mm
2
)
Current Connection
16 AWG (1.5 mm
2
)
12 AWG (4 mm
2
)
Potential (Voltage) Connection
18 AWG (0.8 mm
2
)
14 AWG (2.5 mm
2
)
Contact I/O
18 AWG (0.8 mm
2
)
14 AWG (2.5 mm
2
)
Other Connection
18 AWG (0.8 mm
2
)
14 AWG (2.5 mm
2
)
Use of this equipment in a manner
other than specified in this manual
can impair operator safety
safeguards provided by this
equipment.
!
WARNING
Summary of Contents for SEL-787
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