ASCO POWER TECHNOLOGIES 450 User manual

Surge Protective Devices Installation & Operation Manual
Model 450
Model 451
Model 452
Model 453
450/451
452/453

© 2020 ASCO Power Technologies. All Rights Reserved
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2
IO-70075
08/2020

© 2020 ASCO Power Technologies
All Rights Reserved
Model 450/451/452/453 Surge Protective Device (SPD)
Table of Contents
IO-70075
3
Precautions
Introduction
Unpacking and Preliminary Inspection
Storage
Identication Nameplate
SPD Location Considerations
Environment
Audible Noise
Mounting
Service Clearance
Equipment Performance
Electrical
Voltage Rating
Terminals, Wire Size, and Installation Torque
Branch Circuit Overcurrent Protection
Location of Surge Protective Device (SPD)
Grounding
General
Solidly-Gounded Power Systems
Delta and Resistance-Grounded Power Systems
Installation
Conduit Location and Recommendations
Wiring
UL Conditions of Acceptability
Dimension and Weights
Wiring Diagrams
Wiring Diagrams With Circuit Breaker Connection Switch
UL 1283 Required Language - EMI Filters
Operation
LED Status Indicators
Audible Alarm
Surge Counter
Dry Contacts
Maintanance and Troubleshooting
Preventative Maintenance
Troubleshooting
Remplacement Parts
5
6
6
6
6
6
6
6
6
7
7
7
7
9
9
10
11
11
12
12
13
13
13
14
15
17
18
19
19
20
21
21
21
22
22
22
22
WARNING: This product can expose you to chemicals including DINP, which is known
to the State of California to cause cancer, and DIDP which is known to the State of
California to cause birth defects or other reproductive harm. For more information go
to: www.P65Warnings.ca.gov.

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Safety Information
Important Information
Read these instructions carefully and look at the equipment to become
familiar with the device before trying to install, operate, service or maintain it.
The following special messages may appear throughout thisbulletin or on the
equipment to warn of potential hazards or to call attention to information that
clarifies or simplifies a procedure.
The addition of either symbol to a “Danger”or “Warning” safety label
indicates that an electrical hazard exists which will result inpersonal
injury if the instructions are not followed.
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messagesthat follow this
symbol to avoid possible injury or death.
DANGER
DANGER indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
WARNING
WARNING indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION
CAUTION indicates a hazardous situation which, if not avoided,
could result in minor or moderateinjury.
NOTICE
NOTICE is used to address practices not related to physical injury. The safety
alert symbol shall not be used with this signal word.
Please Note
Electrical equipment should be installed, operated, serviced, and maintained only
by qualified personnel. No responsibility is assumed by ASCO Power Technologies
for any consequences arising out of the use of this material.
A qualified person is one who has skills and knowledge related to the
construction, installation, and operation of electrical equipment andhas received
safety training to recognize and avoid the hazards involved.

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ASCO 450/451/452/453 Surge Protective Device (SPD)
Precautions
Precautions
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe
electrical work practices. See NFPA 70E, NOM-029-STPS or CSA Z462.
• This equipment must only be installed and serviced by qualied electri-
cal personnel.
• Turn o󰀨 all power supplying this equipment before working on or inside
equipment.
• Always use a properly rated voltage sensing device to conrm power is o󰀨.
• Replace all devices, doors and covers before turning on power to this
equipment.
• This equipment must be e󰀨ectively grounded per all applicable codes.
Use an equipment-grounding conductor to connect this equipment to the
power system ground.
Failure to follow these instructions will result in death or serious injury.
NOTICE
LOSS OF BRANCH CIRCUIT POWER / LOSS OF SURGE
SUPPRESSION
• Perform periodic inspection of the surge protective device status
indicator lights as part of the preventative maintenance schedule.
• Promptly replace the surge protective device when an alarm state
exists.
• Use dry contacts to signal an alarm state to the central supervisory
system for unmanned, inaccessible, or critical installations.
• Use multiple surge protective devices to achieve redundancy for critical
applications.
Failure to follow these instructions can result in equipment damage.
At end-of-life conditions, Surge Protective Devices (SPDs) can lose their
ability to block power system voltage and attempt to draw excessive current
from the line. This SPD is equipped with overcurrent and overtemperature
components that will automatically disconnect the surge suppression ele-
ments from the mains should the surge suppression elements reach end of
life. Tripping of the branch circuit breaker or fuse feeding the SPD can occur
when the surge suppression elements reach end of life.
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Do not energize the surge protective device until the electrical system is
completely installed, inspected and tested.
• Ensure all conductors are connected and functional.
• Verify the voltage rating of the device and system prior to energizing.
• Perform high-potential insulation testing, or any other tests where surge
protective device components will be subjected to voltages higher than
their rated turn-on voltage, with the neutral and surge protective device
disconnected from the power source
Failure to follow these instructions will result in death or serious injury.
DANGER

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08/2020
ASCO 450/451/452/453 Surge Protective Device (SPD)
Introduction
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe
electrical work practices. See NFPA 70E, NOM-029-STPS or CSA Z462.
• This equipment must only be installed and serviced by qualied
electrical personnel.
• Turn o󰀨 all power supplying this equipment before working on or inside
equipment.
• Always use a properly rated voltage sensing device to conrm power is
o󰀨.
• Replace all devices, doors and covers before turning on power to this
equipment.
• This equipment must be e󰀨ectively grounded per all applicable codes.
Use an equipment-grounding conductor to connect this equipment to the
power system ground.
Failure to follow these instructions will result in death or serious injury.
Proper installation is imperative to maximize the ASCO 450/451/452/453
surge protective device’s e󰀨ectiveness and performance. Read the entire
instruction bulletin before beginning the installation. These instructions
are not intended to replace national or local electrical codes. Check all
applicable electrical codes to verify compliance. Installation of modular surge
suppressors should only be performed by qualied electrical personnel.
Inspect the entire shipping container for damage or signs of mishandling
before unpacking the device. Remove the packing material and further
inspect the device for any obvious shipping damage. If any damage is found
and is a result of shipping or handling, immediately le a claim with the
shipping company.
The device should be stored in a clean, dry environment. Storage
temperature is -40°F (-40°C) to +140°F (+60°C). All of the packaging
materials should be left intact until the device is ready for installation.
English, Spanish, and French versions of all safety labels (Danger, Warning,
and Caution) are provided.
DANGER
Introduction
Unpacking and Preliminary
Inspection
Storage
Safety Labels
Surge Protective Device
(SPD) Location
Considerations
Environment
Audible Noise
Mounting
Note: For troubleshooting, call technical
assistance at 1-800-237-4567 or
[e-mail]
The device is designed to operate in an ambient temperature range of
-25° C (-13° F) to +60° C (140° F) with a relative humidity of 0 to 95% non-
condensing.
The device background noise is negligible and does not restrict the location
of the installation.
This device is designed to be installed as component assemblies intended
for installation within electrical equipment. See page 15 for mounting
dimensions and weight

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08/2020
ASCO 450/451/452/453 Surge Protective Device (SPD)
Electrical
Electrical
Service Clearance
Equipment Performance
Service clearance is needed at the front of the unit; 36 inches minimum is
the required distance for clearance pursuant to the NEC
To obtain the maximum system performance, locate the device as close
to the circuit being addressed as possible to minimize the interconnecting
wiring length. For every foot of wire length, approximately 160 Volts (6
kV / 3 kA, 8/20 microsecond) is added to the suppressed voltage. The
Voltage Protection Rating (VPR) is located on the device nameplate and is
measured six inches from the enclosure sidewall, according to UL® 1449
test standards.
Voltage Rating
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Conrm the SPD voltage rating on the module or nameplate label is the
same as 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 specier or user of the device must be familiar with the conguration
and arrangement of the power distribution system in which any SPD is to
be installed. The system conguration of any power distribution system is
based strictly on how the secondary windings of the transformer supplying
the service entrance main or load are congured. This includes whether
or not the transformer windings are referenced to earth via a grounding
conductor. The system conguration is not based on how any specic load
or equipment is connected to a particular power distribution system. See
Table 1 for the service voltage of each SPD.
DANGER

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08/2020
ASCO 450/451/452/453 Surge Protective Device (SPD)
Electrical
Table 1: Voltage Ratings

Voltage Codes
P
Per Phase
kA Rating
System

Modes of
Protection

Connection
Type

kA Rating
Per Phase

Series/
Product Line
120S = 120/240V Split Phase - 1Ø,
3W+Grnd, (Fig 1)
120Y = 208Y/120V Wye - 3Ø 4W+Grnd,
(Fig 2)
240H = 240/120V High Leg Delta (B High),
(Fig 3)
277Y = 480Y/277V Wye - 3Ø 4W+Grnd,
(Fig 2)
347Y = 600Y/347V Wye - 3Ø 4W+Grnd,
(Fig2)
480D = 480V Delta - 3Ø 3W+Grnd, (Fig4)
& HRG Wye
120N = 120V Single Phase (Fig 5)
127N = 127V Single Phase (Fig 5)
127S = 127/254V Split Phase - 1Ø
3W+Grnd, (Fig 1)
127Y = 220Y/127V Wye - 3Ø 4W+Grnd
(Fig 2)
220Y = 380Y/220V Wye - 3Ø 4W+Grnd
(Fig 2)
230Y = 400Y/230V Wye - 3Ø 4W+Grnd
(Fig 2)
240N = 240V Single Phase (Fig 5) - Not
split phase
240S = 240/480V Split Phase, or Two legs
of Wye, (Call)
240Y = 415Y/240V Wye - 3Ø 4W+Grnd
(Fig 2)
240C = 240V B Corner Grnd Delta, 3Ø
3W+Grnd (Fig 6)
240D = 240V Delta - 3Ø 3W+Grnd (Fig 4)
254Y = 440Y/254V Wye - 3Ø 4W+Grnd
(Fig 2)
277N = 277V Single Phase (Fig 5)
277S = 240/480V Split Phase, or Two legs
of Wye, (Call)
300N = 300V Single Phase (Fig 5)
300Y = 520Y/300V Wye - 3Ø 4W+Grnd
(Fig 2)
480N = 480V Single Phase (1 Hot, 1 Neu,
1 Grnd) (Fig 5)
480C = 480V B Corner Grnd Delta, 3Ø
3W+Grnd (Fig 6)
600C = 600V B Corner Grnd Delta, 3Ø
3W+Grnd (Fig 6)
600D = 600V Delta - 3Ø 3W+Grnd (Fig 4)
& HRG Wye
450 = Component SPD,
UL Recognized
Standard Modes
451 = Component SPD,
UL Recognized
10 Modes
452 = Component SPD,
UL Recognized
Standard Modes
453 = Component SPD,
UL Recognized
10 Modes
10 = 100kA
15 = 150kA
20 = 200kA
25 = 250kA
30 = 300kA
31 = 300kA
40 = 400kA
45 = 450kA
50 = 500kA
60 = 600kA
80 = 800kA
90 = 900kA
1K = 1000kA
A = All Standard Modes for that Product
Line & Voltage Code
L = Delete L-N (Reduce kA Rating)
G = Delete L-G (Reduce kA Rating)
N = Delete N-G
C = Compression
Lugs or
Terminals
R = Internal Rot.
Disc.

Monitoring
Options
N
Enclosure

UL 1449
Type1/Type 2

Accessory/
Option(s)
A = LED(s)/Aud. Alarm/
Relay
C = LED(s)/Aud. Alrm/
Relay/
Surge Counter
1 = Type 1
2 = Type 2
(Includes
UL1283
Filter)
0 = No Accessory/
Option
X = Yes Accessory/
Option
Figure 1
SPLIT
2 Phase, 1 Neutral,
1 Ground
Phase B (Black)
Phase A (Black)
Neutral (White)
V
V
}
}
Ground (Green)
Figure 2
WYE
3 Phase, 1 Neutral,
1 Ground
}
Phase A (Black)
Phase B (Black)
Neutral (White)
Phase C (Black)
Ground (Green)
A
C
N
V
B
Figure 3
HI-LEG DELTA
(B High) 3 Phase,
(B HIGH), 1 Neutral,
1 Ground
Phase A (Black)
Phase B (Orange)
Neutral (White)
Phase C (Black)
Ground (Green)
}
V
Figure 5
SINGLE POLE
1 Phase, 1 Neutral,
1 Ground
V
}
Neutral (White)
Phase A (Black)
Ground (Green)
Figure 4
DELTA & HRG WYE
3 Phase, 1 Ground
Phase A (Black)
Phase C (Black)
Phase B (Black)
Ground (Green)
}
V
Figure 6
CORNER GROUND
DELTA (B grounded)
2 Phase, 1 Ground
Phase A (Black)
Phase C (Black)
Ground (Green)
V
}

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08/2020
ASCO 450/451/452/453 Surge Protective Device (SPD)
Electrical
Terminals, Wire Size, and
Installation Torque
Branch Circuit Overcurrent
Protection
Terminals are provided for phase (line), neutral, and equipment ground
connections. When equipped with a disconnect switch the 450/451/452/453
terminals accept a range of 6 AWG to1/0 AWG copper wire. For units in-
stalled without a disconnect switch terminals will accept 14 AWG to 2/0 AWG
copper wire
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Use conductors rated for the Overcurrent Protection Device (OCPD) per
applicable codes.
• Use conductors rated for the application per applicable codes.
Failure to follow these instructions will result in death or serious injury.
UL 1449 Type 1 SPDs have been designed and approved for line side
applications prior to the main service disconnect without supplemental
overcurrent protection.
Type 1 SPDs can also be used in Type 2 applications (load side of OCPD).
When either Type 1 or Type 2 SPDs are used on the load side, they must be
installed per local codes.
Since the current drawn by the SPD device during standby operation is
negligible, the SPD device can be connected to a dedicated, separate
branch circuit or connected to a suitable existing branch circuit.
• When connecting to a separate, dedicated branch circuit, the OCPD
setting must be selected to protect the conductors feeding the SPD
device.
• When connecting to an existing branch circuit, the conductors connected
to the SPD device must have an ampacity not less than the setting of the
existing OCPD. (No larger than 60 A).
During overvoltage surge diversion, current will ow through the SPD device.
The branch circuit OCPD must pass this current without tripping for the SPD
device to function properly.
DANGER
Table 2: Terminal Torque
Non Disconnect Connection Torque
Power Connection Torque
AØ, BØ, CØ, N and Ground 18 in-lb ( 2.0 Nm)
Disconnect Connection Torque
Power Connection Torque
AØ, BØ, CØ, N and Ground 18 in-lb ( 2.0 Nm)

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Location of Surge Protective
Device (SPD)
To load(s)
Phases
Neutral
Ground
Ground bus
Neutral bus
SPD
Phase A
Phase B
Phase C
Neutral
Ground
Panel
Interconnect wiring
– Minimize length
– Avoid sharp bends
ASCO 450/451/452/453 Surge Protective Device (SPD)
Grounding
Locate the SPD as close as possible to the circuit being addressed to
minimize the wire length and optimize SPD performance. Avoid long wire
runs so that the device will perform as intended. To reduce wire impedance
from surge currents, the phase, neutral, and ground conductors must be
routed within the same conduit and tightly bundled or twisted together to
optimize device performance. Avoid sharp bends in the conductors. See
Figure 1.
Figure 1: SPD Wiring for Wye and High-Leg Delta Congurations
Figure 2: SPD Wiring for Delta Congurations
To load(s)
Phases
Ground
Phase A
Phase B
Phase C
Ground
SPD
Interconnect wiring
– Minimize length
– Avoid sharp bends

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General
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Connect the Surge Protective Device ground terminal to the building
grounding grid structure.
• Use an appropriately sized equipment grounding conductor.
• When using metallic raceway or conduit:
– Do not use isolated bushings to interrupt the metallic raceway or
conduit.
– Maintain electrical continuity at all raceway and conduit connections
using appropriate bonding devices.
• Do not use a separate isolated ground for the ASCO 450/451/452/453
Surge Protective Device.
• Verify proper equipment connection to the grounding system.
• Verify ground grid continuity by performing regularly scheduled
inspections and testing as part of a comprehensive electrical
maintenance program.
Failure to follow these instructions will result in death or serious injury.
The ASCO 450/451/452/453 has SPD elements connected from phase to
ground. It is critical that there be a robust and e󰀨ective connection to the
building grounding structure. The grounding connection must utilize an
equipment grounding conductor run with the phase and neutral (if present)
connection of the power system.
For proper over-voltage suppression by the ASCO 450/451/452/453 SPD,
use a single-point ground system where the service entrance grounding
electrode system is connected to, and bonded to, all other available
electrodes, building steel, metal water pipes, driven rods, etc. (for reference,
see IEEE 142-2007). The ground impedance measurement of the electrical
system should be as low as possible, and in compliance with all applicable
codes.
Grounding DANGER
ASCO 450/451/452/453 Surge Protective Device (SPD)
Grounding

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ASCO 450/451/452/453 Surge Protective Device (SPD)
Grounding
Delta and
Resistance-Grounded
Power Systems HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Ungrounded power systems are inherently unstable and can produce
excessively high line-to-ground voltages during certain fault conditions.
During these fault conditions any electrical equipment, including an
SPD, may be subjected to voltages which exceed their designed rat-
ings. This information is being provided to the user so that an informed
decision can be made before installing any electrical equipment on an
ungrounded power system.
• Resistance-grounded power systems must be maintained in an over-
damped state to limit voltage overshoot and duration during operation.
• Verication and adjustment of correct power system damping should be done:
– Periodically as part of normal system maintenance.
– Following power system modications.
Failure to follow these instructions will result in death or serious injury.
The ASCO 450/451/452/453 product is intended for use on resistance-
grounded power systems where the power system has been set for, and
is maintained in, an over-damped state. For the power system to be over-
damped, the current through the grounding resistor during a bolted phase-
to-ground fault must be signicantly greater than the total charging current of
the system.
Periodic engineering evaluation of the power system is required to determine
the worst-case charging current of the system and to adjust the grounding
resistance accordingly. As the power system is modied, the value of the
grounding resistor must be evaluated and adjusted to maintain the system in
the over-damped state.
Solidly-Grounded
Power Systems HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Do not connect devices rated for use on solidly-grounded power sys-
tems to resistance-grounded (for example, High Resistance Ground) or
ungrounded power systems.
• Verify that the service entrance equipment is bonded to ground in accor-
dance with all applicable codes.
• Verify that the neutral terminal of the power system transformer feeding
the device is bonded to system ground in accordance with all applicable
codes.
Failure to follow these instructions will result in death or serious injury.
SPDs rated for use on solidly-grounded power systems must not be
connected to resistance-grounded or ungrounded power systems. Such a
connection can result in damage to the SPD.
Always verify the power system grounding conguration prior to application
of power to the device. Conrm that all ground bonds are installed at both
the service entrance equipment and power system transformer prior to
application of power.
DANGER
DANGER

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Installation
Wiring
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe
electrical work practices. See NFPA 70E, CSA Z462 or NOM-029-STPS.
• This equipment must only be installed and serviced by qualied electrical
personnel.
• Turn o󰀨 all power supplying this equipment before working on or inside
equipment.
• Always use a properly rated voltage sensing device to conrm power is o󰀨.
• Replace all devices, doors and covers before turning on power to this
equipment.
• This equipment must be e󰀨ectively grounded per all applicable codes. Use
an equipment-grounding conductor to connect this equipment to the power
system ground.
Failure to follow these instructions will result in death or serious injury.
The recommended conduit entry is at the bottom or either side of the device
enclosure. Use a conduit seal that is appropriate for the enclosure rating.
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe
electrical work practices. See NFPA 70E, CSA Z462 or NOM-029-STPS.
• This equipment must only be installed and serviced by qualied electrical
personnel.
• Turn o󰀨 all power supplying this equipment before working on or inside
equipment.
• Always use a properly rated voltage sensing device to conrm power is o󰀨.
• Replace all devices, doors and covers before turning on power to this
equipment.
• This equipment must be e󰀨ectively grounded per all applicable codes. Use
an equipment-grounding conductor to connect this equipment to the power
system ground.
• Conrm the SPD voltage rating on the module or nameplate label is the
same as the operating voltage.
• Do not touch the bottom located terminals which are energized with the
switch in either the ON or OFF positions.
Failure to follow these instructions will result in death or serious injury.
DANGER
DANGER
Conduit Location and
Recommendations
ASCO 450/451/452/453 Surge Protective Device (SPD)
Installation

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ASCO 450/451/452/453 Surge Protective Device (SPD)
Wiring
The ASCO 450/451/452/453 either comes with terminal lugs, internal or
external rotary disconnect switch.
ASCO 450/451/452/453 SPD:
Follow steps 1 through 7 to make wiring connections to units with either
rotary disconnect switch or terminal block connection:
1. Turn o󰀨 all power supplying this equipment before working on or inside
any enclosure containing this equipment.
2. Conrm SPD is rated for your system by comparing voltage
measurements to the Line Voltage (L-L, L-N) on the product label.
3. Identify proper location for surge protective device. Locate as close
as possible to the panel being addressed so the wires are as short as
possible. Mount unit securely.
Note: The surge protective device must be installed in an accessible
location as described in the NEC.
4. Install in accordance with national and local electrical codes
for overcurrent protection recommendations and wire ampacity
considerations.
Note: Use on solidly grounded systems unless the SPD model is
designed for installation on ungrounded/HRG systems.
Note: See “Terminals, Wire Size, and Installation Torque” and Table 2
on page 9 for acceptable wire size and installation torque.
5. Twist conductors 1/2 turn or more for every twelve inches of length. Do
not loop or coil wires. Be sure to maintain adequate wire bending space
per NEC.
6. If the remote signaling contacts of the diagnostic display panel are to
be used, refer to the section, “Dry Contacts”, on page 21 for wiring
instructions.
UL Conditions of Acceptability For use only in equipment where the acceptability of the combination is
determined by Underwriters Laboratories®. When installed in the end-use
equipment, the following are among the considerations to be made:
1. A suitable electrical enclosure shall be provided in the end-use product.
2. The device is intended for factory and eld installations with the suitability
of the connections (including spacing’s between factory connectors)
determined in the end-use application.
3. The Voltage Protection Rating (VPR) shall be determined in the end-
product where applicable.
4. The SPD unit has been subjected to the following tests of UL 1449,
4th Edition:
a. Surge Testing (VPR)
b. Nominal Discharge Current Test (20 kA)
c. Dielectric Voltage Withstand
d. Current Testing (200 kA Short Circuit Current, Intermediate Protective
Devices (OCPD) or external enclosures.
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• On a high-leg delta installation, the high-leg of the power system must
be connected to the B phase lug of the SPD.
Failure to follow these instructions will result in death or serious injury.
DANGER

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15
IO-70075
08/2020
ASCO 450/451/452/453 Surge Protective Device (SPD)
Dimension and Weights
Dimension and weights
ASCO 450/451/452/453
Series
Model 450/451 H/W/D (in. / mm.) Weight (lbs. / kg.)
Standard 6.50 x 11.00 x 4.50 in.
(165 x 279 x 114mm.)
4.20 lbs.
(1.90 kg.)
With optional disconnect
switch on aluminum
backplane
10.75 x 10.88 x 4.50 in.
(273 x 276 x 114mm.)
6.50 lbs.
(2.95 kg.)
Model 452/453 H/W/D (in. / mm.) Weight (lbs. / kg.)
Standard 9.00 x 11.00 x 4.50 in.
(229 x 279 x 114mm.)
7.35 lbs.
(3.33 kg.)
With optional disconnect
switch on aluminum
backplane
14.75 x 12.90 x 5.25 in.
(375 x 328 x 133mm.)
10.30 lbs.
(4.67 kg.)
Figure 3: 450/451 Dimensions (in./mm.)
7. Replace all devices, doors, and covers before turning on power to
the equipment. If the SPD is properly installed and functioning, the
green LED indicators on the display will be lit and the service LED
extinguished.
If you have any questions pertaining to the installation of this device, contact
us at [phone] or [e-mail]

© 2020 ASCO Power Technologies. All Rights Reserved
For troubleshooting, call technical assistance at 1-800-237-4567 or [e-mail]
16
IO-70075
08/2020
Figure 4: 452/453 Dimensions (in./mm.)
ASCO 450/451/452/453 Surge Protective Device (SPD)
Dimension and Weights

© 2020 ASCO Power Technologies. All Rights Reserved
For troubleshooting, call technical assistance at 1-800-237-4567 or [e-mail]
17
IO-70075
08/2020
ASCO 450/451/452/453 Surge Protective Device (SPD)
Wiring
Wiring Diagrams Figure 5: Split-Phase Three-Wire Grounded Installation
Figure 6: Three-Phase, Four-Wire, Grounded Wye Installation
Figure 7: Three-Phase, Four-Wire, High-Leg Delta Installation

© 2020 ASCO Power Technologies. All Rights Reserved
For troubleshooting, call technical assistance at 1-800-237-4567 or [e-mail]
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IO-70075
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Wiring Diagrams With
Circuit Breaker
Connection Switch
Figure 8: Split-Phase, Three-Wire, Grounded Installation Circuit Breaker
Connection
Figure 9: Three-Phase, Four-Wire, Grounded Wye Installation with Circuit
Breaker Connection
Figure 10: Three-Phase, Four-Wire, High-Leg Delta Installation with Circuit
Breaker Connection
ASCO 450/451/452/453 Surge Protective Device (SPD)
Wiring

© 2020 ASCO Power Technologies. All Rights Reserved
For troubleshooting, call technical assistance at 1-800-237-4567 or [e-mail]
19
IO-70075
08/2020
ASCO 450/451/452/453 Surge Protective Device (SPD)
Operation
UL 1283 required language
concerning the installation of
EMI Filters (standard on Type
2 models)
Operation
A. An insulated grounding conductor that is identical in size and insulation
material and thickness to the grounded and ungrounded circuit supply
conductors, except that it is green with or without one or more yellow
stripes, is to be installed as part of the circuit that supplies the lter. Ref-
erence should be made to Table 250-122 of the National Electrical Code
regarding the appropriate size of the grounding conductor.
B. The grounding conductor mentioned in item a is to be grounded to earth
at the service equipment or other acceptable building earth ground such
as the building frame in the case of a high-rise steel frame structure.
C. Any attachment-plug receptacles in the vicinity of the lter are to be of a
grounding type, and the grounding conductors serving these receptacles
are to be connected to earth ground at the service equipment or other
acceptable building earth ground such as the building frame in the case
of a high-rise steel-frame structure.
D. Pressure terminal or pressure splicing connectors and soldering lugs
used in the installation of the lter shall be identied as being suitable for
the material of the conductors. Conductors of dissimilar metals shall not
be intermixed in a terminal or splicing connector where physical contact
occurs between dissimilar conductors unless the device is identied for
the purpose and conditions of use.
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe
electrical work practices. See NFPA 70E, CSA Z462 or NOM-029-STPS.
• This equipment must only be installed and serviced by qualied
electrical personnel.
• Turn o󰀨 all power supplying this equipment before working on or inside
equipment.
• Always use a properly rated voltage sensing device to conrm power is
o󰀨.
• Replace all devices, doors and covers before turning on power to this
equipment.
• This equipment must be e󰀨ectively grounded per all applicable codes.
Use an equipment-grounding conductor to connect this equipment to the
power system ground.
Failure to follow these instructions will result in death or serious injury.
DANGER
Figure 11: Internal Mount Display Dimensions
9296_R1
Service
SilenceTest Count Reset
Surge Counter
Full Protection
When One (1)
LED Per Phase
Is Illuminated.
400 SERIES
Surge Protective Device
Ø 0.5 (4 PL.)
Ø 0.180 THRU
(4PL.)
R 0.375 (4 PL.)

© 2020 ASCO Power Technologies. All Rights Reserved
For troubleshooting, call technical assistance at 1-800-237-4567 or [e-mail]
20
IO-70075
08/2020
LED Status Indicators The SPD diagnostic display panel shows the status of each phase of the
SPD with diagnostically controlled green/red LEDs. If a unit is operating
correctly, all of the phase LEDs will be illuminated green. To test the integrity
of the diagnostics for each phase, push the button below the phase LEDs on
the diagnostic display panel. The green LED will turn red and the alarm will
sound, if the alarm is enabled. Releasing the test button will complete the
test; the red LED will turn green and the alarm will shut o󰀨.
If an inoperable condition occurs on any phase, the audible alarm sounds
and the corresponding phase LED on the diagnostic display panel is
extinguished and the service light will illuminate. This indicates that the
device needs service by qualied electrical personnel.
The audible alarm can be silenced, until a qualied person is able to
evaluate and service the SPD, by pressing the alarm silence button. The
alarm will silence and the LED above the button will be lit. The red service
LED will continue to be illuminated until the inoperative condition had been
cleared.
Figure 12: Diagnostic Display Panel
Phase A, B & C: Green LED indicators—one per phase. Green is good.
Out indicates problem. Every suppression element in this SPD is monitored.
(N-G indicates on Phase A)
Service LED (Red): LED illuminates in the event of problems. This indicator
is logic-connected to the Phase LEDs. Should a Phase LED go out the
Service LED will illuminate and the Audible Alarm will sound.
Test: Tests red Service LED and Audible Alarm, and changes state of Dry
Contacts.
Alarm Silence: Turns Audible Alarm o󰀨. (Alarm is deactivated when the
Silence LED is illuminated.)
Surge Counter Count: (if equipped) Increments optional surge counter by
one. (+1)
Surge Counter Reset: (if equipped) Resets optional surge counter to zero.
(0)
Silence
9294_R1
Test Count Reset
Surge Counter
Service
Full Protection
When One (1)
LED Per Phase
Is Illuminated.
400 SERIES
Surge Protective Device
ASCO 450/451/452/453 Surge Protective Device (SPD)
Operation