2.10
SEL-351A Relay Instruction Manual Date Code 20080213
Installation
Making Rear-Panel Connections
Making Rear-Panel Connections
Refer to Figure 2.12–Figure 2.25 for wiring examples of typical applications.
Refer to Table 1 .1 and Figure 2.2, Figure 2.5, and Figure 2.6. Notice the two
types of rear-panel hardware connections. Reference is made to the model
numbers in discussing rear-panel connection differences in the following text.
Required Equipment
and General
Connection
Information
Models 0351A0W (Plug-In Connectors)
Wiring Harness
The SEL-WA03510W Wiring Harness includes all connectors necessary for
relay installation. All connectors requiring special termination come prewired
from the factory. Refer to the SEL-WA03510W Model Option Tables, which
are available from the factory.
The SEL-WA03510W Wiring Harness includes the following connectors (not
prewired):
➤ (2) 8-position female plug-in connectors for output contacts
OUT101–ALARM.
➤ (2) 6-position female plug-in connectors for optoisolated inputs
IN101–IN106.
➤ (1) 8-position female plug-in connectors for EIA-485/IRIG-B
Serial PORT 1.
These connectors accept wire size AWG 24 to 12. Strip the wires 0.31 inches
(8 mm) and install with a small slotted-tip screwdriver. Secure each 8 position
connector to the relay chassis with the screws located on either end of the
connector. The 8-position connectors are coded at the factory to prevent
swapping connectors during installation. Refer to Figure 2.7 for the standard
input/output connector coding.
The wiring harness includes the following prewired connectors:
➤ (1) CT shorting connector for current inputs IA, IB, IC, and IN.
➤ (1) connector for voltage inputs VA, VB, VC, and VS.
➤ (1) connector for POWER inputs (+ and –).
➤ (1) spade connector for ground (GND) connection (chassis
ground).
These prewired connectors (and the serial port connector) are unique and may
only be installed in one orientation.
Tools: Small slotted-tip screwdriver, wire strippers
Parts: SEL-WA03510W Wiring Harness
Courtesy of NationalSwitchgear.com
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