© 2020 ASCO Power Technologies. All Rights Reserved
7
IO-70060
05/2020
For access to self-service tools and chat support visit se.com/us/en/work/support or call 1-888-778-2733 for technical assistance
ASCO 425 Surge Protective Device (SPD)
Electrical
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
Confirm the surge protective device voltage rating on the module or
nameplate label is not less than the operating voltage.
Failure to follow these instructions will result in death or serious injury.
Prior to mounting the SPD, verify that the device has the same voltage
rating as the power distribution system in which it is installed. Compare the
nameplate voltage or model number on the SPD with the nameplate of the
electrical distribution equipment.
The specifier or user of the device should be familiar with the configuration
and arrangement of the power distribution system in which the SPD is to be
installed. The system configuration of any power distribution system is based
strictly on how the secondary windings of the transformer supplying the ser-
vice entrance main or load are configured. This includes whether or not the
transformer windings are referenced to earth via a grounding conductor. The
system configuration is not based on how any specific load or equipment
is connected to a particular power distribution system. See Table 1 for the
service voltage of each SPD.
Electrical
Voltage Rating
Table 1:
Model 425 Service Voltages
Voltage Codes
P
10
W
A
J
A
Per Phase
kA Rating
System
Modes of
Protection
(Default)
Connection
Type
Monitoring
Options
Enclosure
UL 1449
Type1/Type 2
Accessory/
Option(s)
kA Rating
Per Phase
425
Model 425
Product Line
J = NEMA 4X Non-Metallic
(Polycarbonate)
Size - 8.3” x 3.6” x 3.0”
W = Wire Leads
A = LEDs/Audible Alarm/Relay
1 = UL 1449 Type 1
2 = UL 1449 Type 2,
0 = No Trailing Accessory/Option
X = Yes Trailing Accessory/Option
10 = 100kA
DANGER
Common Systems
120S = 120/240V Split Phase - 1Ø, 3W+Ground
120Y = 208Y/120V Wye - 3Ø 4W+Ground
230Y = 400Y/230V Wye - 3Ø 4W+Ground
240H = 240/120V High Leg Delta (B High)
240D = 240V Delta - 3Ø 3W+Ground
277Y = 480Y/277V Wye - 3Ø 4W+Ground
347Y = 600Y/347V Wye - 3Ø 4W+Ground
480D = 480V Delta - 3Ø 3W+Ground & HRG Wye
600D = 600V Delta - 3Ø 3W+Ground & HRG Wye
Other Systems - Confirmation Encouraged
127S = 127/254V Split Phase - 1Ø 3W+Ground
127Y = 220Y/127V Wye - 3Ø 4W+Ground
220Y = 380Y/220V Wye - 3Ø 4W+Ground
240S = 240/480V Split Phase, or Two legs of Wye
240Y = 415Y/240V Wye - 3Ø 4W+Ground
240C = 240V B Corner Ground Delta, 3Ø 3W+Ground
254Y = 440Y/250V Wye - 3Ø 4W+Ground
277S = 240/480V Split Phase, or Two legs of Wye
300Y = 520Y/300V Wye - 3Ø 4W+Ground
480C = 480V B Corner Ground Delta, 3Ø 3W+Ground
600C = 600V B Corner Ground Delta, 3Ø 3W+Ground
