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For troubleshooting, call technical assistance at 1-800-237-4567 or [email protected]
4
IO-75066
01/2020
ASCO Model 318
Surge Protective Device (SPD)
Installation
Wiring Diagrams
1.
Turn off power prior to installing SPD.
2. Install SPD on a 35mm Din Rail in a suitable enclosure.
3. Connect SPD in parallel with the power source. (See Connection
Wiring Diagrams). Keep wire lengths as short as possible to maximize
performance.
4. Use #6-#14 AWG wire for terminal connections. Maximum torque to be
applied to terminal screws is 14.75 in-lb [1.67 N-m].
5. The Model 318 has optional remote status contacts. The contacts may
be wired using either the normally open “NO” or normally closed “NC”
positions depending on the application. See Remote Output Diagram.
The contacts are rated 125VAC, 3 Amps maximum.
6. Turn on power and verify operation.
Figure 1:
Single Phase
Figure 2:
Split Phase
Figure 3:
WYE
Figure 4:
Delta
A
C
B
Ground (GRN)
Phase A (BLK)
Phase B (BLK)
Phase C (BLK)
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
GRN
GRN
C
N
Ground (GRN)
A
B
Neutral (WHT)
Phase B (BLK)
Phase A (BLK)
Phase C (BLK)
BLK
BLK
BLK
BLK
BLK
BLK
WHT
WHT
BLK
BLK
WHT
BLK
Phase A (BLK)
Phase B (BLK)
Neutral (WHT)
Ground (GRN)
BLK
WHT
GRN
WHT
Phase A (BLK)
Ground (GRN)
Neutral (WHT)
BLK
WHT
BLK
WHT
GRN
