Asco 950 User manual

Surge Protective Devices Installation & Operation Manual
Model 950
SPD
Fuse
Box

© 2020 ASCO Power Technologies
All Rights Reserved
Model 950 Surge Protective Device (SPD) and Fuse Box
Table of Contents
IO-70071
2
Precautions
Introduction
General Information
Product Family Outline
Overcurrent Protection (OCP)
Service Guidelines
System Grounding and Bonding
Unpacking & Preliminary Inspection
Environmental Specications
SPD Component Specications
Fuse Box Component Specications
Storage Environment
Equipment Performance
Pre-Installation and Installation Planning
Operating Environment
Typical Installation Location
Installation
Mounting, Dimensions & Weight
Audible Noise
Service Clearance
Overcurrent Protection
Voltage Rating
Wire Size
Optional Monitoring Package
Operation
Maintenance
Troubleshooting and Service
Dimensional Drawings
SPD Component Mechanical Drawings
Fuse Box Component Mechanical Drawings
4
6
6
6
7
7
9
9
9
9
9
9
9
10
10
10
10
12
12
12
12
13
13
13
14
14
14
15
15
16
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 Model 950 Surge Protective Device (SPD) and Fuse Box
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.
• Conrm that 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.
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• This Surge Protective Device (SPD) + Three Phase Fuse Box is for use
by those who understand and accept its benets and risks.
• The loss of SPD protection is a symptom of system level overvoltage
problems. Ungrounded distribution systems are designed to ‘oat’ and
‘move’ with respect to ground. An SPD that has lost protection may
escalate the initial distribution system anomaly, resulting in equipment
shutdown, single-phasing, loss of production, etc.
• In the event of sustained overvoltages caused by electrical distribution
system anomalies, the SPD component will fail short-circuited and draw
follow-on available electrical fault current. This will result in the clearing
of the dedicated upstream overcurrent protection (OCP) provided by the
Fuse Box.
• The two components of the 950 are to be installed together as one unit.
• The Fuse Box component is REQUIRED to be installed on the lineside
of, and in-line with, the medium voltage SPD component as dedicated
OCP and to disconnect the SPD from the electrical system in the event
of SPD failure.
• The entire 950 is to be installed in parallel with the electrical system.
• ASCO recommends that the Model 950 not be installed unless this infor-
mation is understood and acceptable to the end-user.
Failure to follow these instructions will result in death or serious injury.
DANGER
DANGER

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ASCO Model 950 Surge Protective Device (SPD) and Fuse Box
Precautions
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
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.

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ASCO Model 950 Surge Protective Device (SPD) and Fuse Box
Introduction
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Proper installation is required to maximize performance. Please follow
steps outlined herein.
• Read this Installation, Operation & Maintenance Manual in its entirety
prior to beginning installation.
• These instructions are not intended to replace national or local codes.
Follow all applicable electrical codes.
• Installation of the Model 950 should only be performed by qualied
electrical personnel familiar with 1kV to 5kV systems.
Failure to follow these instructions will result in death or serious injury.
Thank you for choosing an ASCO Surge Protective Device (SPD). This is a
high quality, high energy surge current diversion system designed for use
with equipment that is sensitive to damaging transient voltage surges.
Proper installation is important to maximize performance. Please follow
steps outlined herein.
This Installation, Operation & Maintenance Manual should be read in its
entirety prior to beginning installation. These instructions are not intended
to replace national or local codes. Follow all applicable electrical codes to
ensure compliance. Installation of the Model 950 should only be performed
by qualied electrical personnel familiar with 1kV to 5kV systems.
ASCO’s Medium Voltage SPDs are extensively tested in accordance with
industry standards such as ANSI/IEEE C62.11.
This unit is a Single-port Parallel-connected Device + Three Phase Fuse
Box designed for installation on medium voltage (1000V up to 4160V) switch
gear at service entrance and downstream applications for IEEE Category C,
B, or A locations.
DANGER
Introduction
General Information
Product Family Outline
Note: 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
Model 950 – Medium Voltage Surge Protective Device + Three Phase Fuse
Box
The 950 consists of a Medium Voltage Parallel SPD and stand-alone, Three
Phase Fuse Box. The 950 is designed for Oil & Gas, Water/Wastewater,
Chemical, Large Industrial & Heavy Duty Applications at Service Entrance,
Distribution locations as well as Individual Equipment. The Three Phase
Fuse Box component of the 950 is REQUIRED to be installed on the line-
side of, and in-line with, the medium voltage SPD component as dedicated
overcurrent protection and to disconnect the SPD from the electrical system
in the event the SPD reaches end of life. The 950 comes available in 5
voltages & 120 or 240kA per phase. See Model Number Decoder in Table 1.

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Overcurrent Protection (OCP)
Service Guidelines
ASCO Model 950 Surge Protective Device (SPD) and Fuse Box
General Information
Unlike most traditional SPDs, this device does NOT feature internal
overcurrent and overtemperature protection that will disconnect a󰀨ected
surge suppression components at the end of their useful life. This unit
is provided with an external fuse box to provide dedicated OCP. When
the SPD and fuse box are installed according to this manual and the
SPD reaches the end of its useful life the OCP fuses in the fuse box will
disconnect the SPD from the system, but maintain power to the load –
now unprotected. If this situation is undesirable for the application, follow
the instructions for replacing the device.
Service of this unit consists of replacing fuses in the fuse box. If the event
that a fuse needs replacing please contact the factory for troubleshooting
assistance.
THERE ARE NO USER SERVICEABLE PARTS INSIDE THE MAIN SPD
ENCLOSURE. Opening the 12 in. x 12 in. door does not gain access to
serviceable components and will void the limited warranty.

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ASCO Model 950 Surge Protective Device (SPD) and Fuse Box
General Information
Figure 1: Typical Parallel Connected SPD + Fuse Box
Table 1: Model Number Decoder
Front View of Switchgear
Side View of SPD + FB
Side View of Switchgear
Front View of SPD + FB

Voltage Codes
P A
Per Phase
kA Rating
System
Modes of
Protection
(Default)
Connection Type
(Default)

Monitoring
Options

Enclosure UL 1449 Type

Accessory/
Option(s)

kA Rating
Per Phase
950
Model 950
Product
Line
G = NEMA 4
SPD: steel
fuse box: polycarbonate
R = NEMA 3R
SPD: steel
fuse box: polycarbonate
diagnostics: steel 3R
W = Wire leads
N = None (default)
R =
LEDs and dry contact relays
(R enclosure only)
(120kA only)
0 = No trailing accessory/option
Code
Service
voltage
Maximum continuous
operating voltage (MCOV)
10XD = 1000V 1200VAC
15XD = 1500V 2000VAC
20XD = 2000V 2400VAC
25XD = 2500V 3400VAC
30XD = 3000V 4000VAC
36XD = 3600V 4800VAC
41XD = 4100V 5600VAC
12 = 120kA
per
phase
24 = 240kA
per
phase
Not applicable
W N

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ASCO Model 950 Surge Protective Device (SPD) and Fuse Box
Grounding and Bonding
System Grounding and Bonding
Environmental Specications
SPD Component Specications
Fuse Box Component
Specications
Storage Environment
Equipment Performance
Unpacking & Preliminary
Inspection
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Medium voltage systems are ungrounded. Ungrounded systems are
inherently unstable and can produce excessively high line-to-ground
voltages during certain conditions. During these conditions, any elec-
trical equipment including an SPD may be subjected to voltages which
exceed their design ratings. 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.
Failure to follow these instructions will result in death or serious injury.
Inspect the entire shipping container for damage or signs of mishandling.
Remove the packing materials and further inspect the unit for any obvious
shipping damages.
If any damage was found and is a result of shipping or handling, immediately
le a claim with the shipping company and forward a copy to ASCO.
Relative Humidity Range: 0 - 95% Non-condensing
Operating Frequency: 50, 60Hz
Operating Temperature: -40°F (-40°C) to +185°F (+85°C)
NEMA 4 (IP66) Heavy Gauge Steel Enclosure Standard
Standard Size: 12 x 12 x 6 in. (305 x 305 x 152 mm.)
Weight: 65 lbs. (29.5 kg.) to 75 lbs. (34.5 kg.)
NEMA 4X Polycarbonate with Stainless Steel Lockable Latches
Standard Size: 18” x 16” x 10” (457mm x 406mm x 254mm)
Weight: 35 lbs. (15.9kg)
Store unit in a clean, dry environment. Storage temperature range is -40°F
(-40°C) to +185°F (+85°C). Avoid exposure to high condensation.
To obtain optimum surge suppression, locate the SPD as close as possible
to the circuitry being surge-limited to minimize the wire length. Minimizing
the wire length reduces the impedance between the circuitry and the SPD.
Refer to the Voltage Protection Rating (VPR) values on the SPD nameplate.
These VPR values were obtained by testing the SPD with six-inch long
leads (per UL1449). For every additional foot of wire beyond six inches, the
e󰀨ective VPR increases by approximately 160 volts.
DANGER

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ASCO Model 950 Surge Protective Device (SPD) and Fuse Box
Pre-Installation and Installation Planning
Pre-Installation and Installation
Planning
Installation
Operating Environment
Typical Installation Location
The SPD component of this unit uses a NEMA Type 4 (IP66) heavy gauge
steel enclosure. The SPD comes pre-wired. Install SPD with the conduit hub
facing downward to maintain the enclosures rating and avoid water getting
in the connected conduit. The fuse box component uses a NEMA Type 4X
polycarbonate enclosure with 2 – 1 ¼” threaded hubs included to enter and
exit the enclosure. Before installing, ensure that the enclosure type and
application are appropriate with regard to moisture, dirt, excessive dust,
ammable materials or atmospheres, corrosive vapors, etc.
Model 950 is designed for an ambient temperature range of -40°F (-40°C) to
+185°F (+85°C) with a relative humidity of 0% to 95% (non-condensing).
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Install the 950 on the load-side of the main overcurrent protection
device. When selecting the installation location verify that there is
enough space for both the fuse box and SPD to be installed and that
their combined weight can be supported.
Failure to follow these instructions will result in death or serious injury.
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Pre-plan the installation and read and understand all instructions.
• 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.
• Conrm that the Surge Protective Device voltage rating on the module
or nameplate label is not less than the operating voltage.
• Mount unit in such a way that the SPD component conduit hub is facing
downward (for weather resistance).
Failure to follow these instructions will result in death or serious injury.
DANGER
DANGER

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ASCO Model 950 Surge Protective Device (SPD) and Fuse Box
Installation
NOTICE
HAZARD OF PERFORMANCE OPTIMIZATION
• Mount SPD as close to panel or equipment as possible to keep leads short.
• Coordinate the installation and location of Model 950 to include the SPD
and fuse box components.
• Ensure leads are as short and straight as possible (cut excess wire),
including ground by planning the installation that will result in the
shortest possible overall lead length.
Failure to follow these instructions can result in equipment damage.
• Read all Instructions.
• All electrical connections should be performed by a qualied electrician
or technician.
• Meet all National and Local codes.
• Mount SPD as close to panel or equipment as possible to keep leads
short.
• Coordinate the installation and location of Model 950 to include the SPD
and fuse box components.
• Model 950 should be installed as close as possible to the point of
connection with the electrical distribution system.
• Excessive overall wire length, from the SPD, through the fuse box to the
point of connection with the electrical distribution system will adversely
a󰀨ect the performance of the SPD.
• Ensure leads are short and straight as possible (cut excess wire),
including ground by planning the installation that will result in the shortest
possible overall lead length.
• Unit mounting should be in such a way that the SPD component conduit
hub is facing downward (for weather resistance).
1. Remove power from panel. Conrm panel is deenergized and locked out.
2. Identify connection, SPD & fuse box locations for shortest leads.
3. Mount SPD and fuse box on a surface capable of supporting 100lbs
(45.4kg) using the hardware and conduit provided along with any other
conduit and ttings as needed, SPD must be mounted with the conduit
hub facing downward.
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.
5. Thread the 3 Phase and 1 Ground conductors from the SPD through
the 6” conduit and the top hub of the fuse box and connect to the Phase
and Ground lugs inside the fuse box, remember to keep the leads as
short as possible.
6. 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.
7. Thread the 3 Phase and 1 Ground conductors from the bottom of
the fuse box to Phase A, B, C and Ground in the switchgear. Each
conductor from the SPD will be labeled A, B, or C. Connect A, B & C
Phase conductors from the SPD to Phase A, B, & C in the fuse box and
at the point of connection with the electrical system.
8. Label or mark conductors from the fuse box as appropriate.
9. 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.
HAZARD OF ELECTRIC SHOCK, EXPLO-
SION, OR ARC FLASH
• Prior to energizing, verify that the system is
clear of deciencies.
• Maintain a safe distance from SPD and Fuse
box when power is applied as a precaution
against misapplication.
Failure to follow these instructions will result
in death or serious injury.
DANGER
Figure 2: Typical Installation (Front View)
Note: If you have any questions pertaining to the
installation of this device, chat support is available
at se.com/us/en/work/support or call
1-888-778-2733 for technical assistance

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ASCO Model 950 Surge Protective Device (SPD) and Fuse Box
Installation
Model 950 background noise is negligible or non-existent, and does not
restrict the location of installation.
Service clearance is needed at the front of the unit. There are no user
serviceable parts inside the main SPD enclosure. The fuse box fuses can
be replaced as needed. Note that if a fuse has blown, the SPD component
likely needs replacing.
SPDs draw very little current under normal conditions and conduct for a brief
duration upon encountering a transient surge current. This device does NOT
feature an internal overcurrent or overtemperature disconnecting means.
Supplemental overcurrent protection is provided in the form of the fuse box.
Mounting, Dimensions & Weight
Audible Noise
Overcurrent Protection
Service Clearance
MOUNTING, DIMENSIONS & WEIGHT
• Model 950 is a stand alone unit that can be connected anywhere in
the distribution system and is intended for external mounting on a at
vertical surface.
• The surface must be capable of supporting 75 lbs. (34.5 kg.) + 35 lbs.
(15.9 kg.).
• The enclosure dimensions of the SPD are 12 x 12 x 6 in. (305 x 305 x
152 mm.) and the fuse box are 18 x 16 x 10 in. (457 x 406 x 254 mm.).
Failure to follow these instructions can result in injury.
NOTICE
LEAD LENGTHS & MAXIMIZING SPD PERFORMANCE
• Model 950 must be located as close to the circuit as possible to
minimize parasitic losses. Surges are high current, high frequency
events that cause substantial voltage drops across conductors. Use the
shortest & straightest possible leads. Pre-plan installations so that the
closest connection points are used.
• This SPD is provided with 2 feet (0.61 meters) of #6 AWG and the
fuse box is provided with 8 feet (2.4 meters) of #6 AWG conductor for
all three phases and ground. Once a suitable location for the 950 has
been determined, cut the provided wire to the appropriate length for
connection to the fuse box and to the switchgear. Do NOT coil or pigtail
excess wire. Do NOT cut pre-installed conductors until after installation
is thought through.
• Voltage drops for normal phase conductors might be 2-3V per hundred
feet. In surge applications, voltage drops might be 100-160V per foot
(depending on surge current). These voltage drops add to clamping
voltage, thus hurting performance. Make every e󰀨ort to keep leads short
and straight.
Failure to follow these instructions can result in equipment damage.
CAUTION

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ASCO Model 950 Surge Protective Device (SPD) and Fuse Box
Voltage Rating
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.
Model 950 comes pre-wired with 2 feet (1.3 meters) of #6 AWG stranded
leads for all three phases and ground for SPD to fuse box connection and 8
feet (2.4 meters) of #6 AWG stranded leads for all three phases and ground
for fuse box to switchgear connection.
The Model 950 Monitoring Package is an option we o󰀨er that allows for
on-site or remote monitoring of suppression circuits, Indicator lights for each
phase, and Dry Contacts for each phase. This option is available on 120kA
models only. See Figure 3 & 4.
Voltage Rating
Wire Size
Optional Monitoring Package
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• The Three Phase Fuse Box component of the Model 950 is REQUIRED
to be installed on the line-side of, and in-line with, the medium voltage
SPD component as dedicated overcurrent protection and to disconnect
the SPD from the electrical system in the event of SPD failure.
Failure to follow these instructions will result in death or serious injury.
DANGER
Figure 3: Model 950 SPD Component with Optional Monitoring

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12.37
10.01
8.00 0.31
13.52
12.77
10.00
8.54
6.29
1.25
2.75
GREEN ON
Protection
A
B
C
GREEN OFF
Phase Loss
or
Grounded
Phase
900 SERIES
Surge Protective Device
ASCO Model 950 Surge Protective Device (SPD) and Fuse Box
Operation
Figure 4: Component Optional Monitoring Mechanical Drawings (Dimensions - in.)
Maintenance
Troubleshooting and Service
Operation
Model 950 requires minimal maintenance. We recommend periodic
inspection of fuses during any scheduled shutdown periods. Keep the SPD
free of dirt and debris.
The ASCO 950 surge protector has little to troubleshoot. Only a
nonfunctional SPD will open the fuses. Opened fuses should be replaced
with the same make, model and amperage. Do not replace with fuses
under 15A, due to the possibility of inadvertent nuisance tripping. Do NOT
replace opened fuses with ones rated 200A and higher as this will not
properly disconnect the SPD from the electrical system. If a fuse is opened
or a service condition is believed to exist please contact ASCO Power
Technologies.
For application questions, chat support is available at:
se.com/us/en/work/support or call 1-888-778-2733 for technical assistance
Model 950 does not have operational indicators. When an upstream
overcurrent protection fuse within the fuse box opens, the SPD should be
evaluated for proper operation.
Front View
Side View

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12.24
6.30
2.42
0.95
0.3120
10.00
13.50 12.75
Figure 5: Model 950 SPD Component Mechanical Drawings (Dimensions - in.)
ASCO Model 950 Surge Protective Device (SPD) and Fuse Box
Dimensions
Front View
Side View

18.91
[480.26]
14.00
[355.60]
MOUNTING
DIM.
18.75
[476.25]
MOUNTING
DIM.
11.32
[287.45]
10.97
[278.70]
1.63
[41.30]
7.36
[186.99]
BUSSMANN
5.5CAV15E
5.5 KV
15 AMP
QTY. 3
CONDUIT HUB 1 1/4”
CONDUIT HUB 1 1/4”
0.73
[18.42]
16.91
[429.46] 0.84
[21.32]
19.69
[500.13]
IO-70071 RevC 01-20
While every precaution has been taken to ensure accuracy and
completeness in this literature, Schneider Electric assumes no
responsibility, and disclaims all liability for damages resulting from
use of this information or for any errors or omissions.
14550 58th Street North
Clearwater, Florida 33760
se.com/us/en/work/support
1-888-778-2733
Figure 6: Model 950 Fuse Box Component Mechanical Drawings (Dimensions - in. / mm.)
Inside View (Door Removed)
Side View
Fuse Detail