
Electrical equipment should only be installed, operated, serviced and maintained by qualified personnel.
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Hubbell Wiring Devices
No responsibility is assumed by Hubbell for any consequences arising out of the use of this material.
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19
SPD
See Note
(below)
Ground
Phase B
Phase C
Phase A
B
A
C
SPD
See Note
(above)
Ground
Phase B
Phase C
Phase A
B
A
C
Corner Grounded Delta
Ungrounded Delta
Note:
The ground connection of the Delta SPD shall be connected to the system
ground conductor. The neutral conductor is not present on Delta systems.
Note:
Phase B of the electrical system is typically the grounded phase
Customer Connections 320-480 kA
Customer Connections 100-240 kA
Ground
Phases (A, B, C)
Phase A
Phase B
Phase C
Ground
Customer Connections 320-480 kA with Integral Switch
Customer Connections 100-240 kA with Integral Switch
Ground
Phase A
Phase C
Phase B
Phase A
Phase C
Phase B
Ground
SURGE PROTECTIVE DEVICE
Push-to- Test:
= OK
= Replace Module
Surge
Counter
Audible
Alarm
AØ
BØ
CØ
8232-0031 REV 01
SURGE PROTECTIVE DEVICE
Push-to- Test:
= OK
= Replace Module
Surge
Counter
Audible
Alarm
AØ
BØ
CØ
8232-0031 REV 01
SURGE PROTECTIVE DEVICE
Push-to- Test:
= OK
= Replace Module
Surge
Counter
Audible
Alarm
AØ
BØ
CØ
8232-0031 REV 01
SURGE PROTECTIVE DEVICE
Push-to- Test:
= OK
= Replace Module
Surge
Counter
Audible
Alarm
AØ
BØ
CØ
8232-0031 REV 01
Figure
12:
Three-Phase, Three-Wire + Ground, Delta Installation
SpikeShield
®
Modular Panel Surge Protective Device (SPD)
WIRING