Current Technology ISM Series User manual

Electrical Transient
Suppression Filter Systems
Installation, Operation
and Maintenance Manual
PN 750-0072-010 B00
ISM
SURGE
PROTECTION
Integrated Suppression Module
TM

2
CURRENT TECHNOLOGY®ISMTM INTEGRATED SUPPRESSION MODULE
Guide to Installation and Assistance ............................. 3
Pre-Installation Checklist ..................................... 5
Installation Methods ......................................... 6
Service Configurations ....................................... 7
Plan Your Installation ........................................ 9
Conductor Sizing and Overcurrent Protection ....................... 9
Neutral to Ground Filter Jumper ............................... 10
Mounting................................................ 11
Electrical Connections ...................................... 11
Before Applying Power Checklist ............................... 12
Verify Proper Operation ..................................... 13
Connecting Form “C” Dry Contacts ............................. 14
Troubleshooting ........................................... 15
Installation Assistance ...................................... 15
Operation/Maintenance ..................................... 16
Options ................................................. 16
Standards and Listings...................................... 16
Appendix................................................ 17
Dimensional Specifications ................................... 17
Warranty, 15-Year Limited ................................... 19
Table of Contents
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The ISMTM (Integrated Suppression Module) is an electrical transient suppression filter system that protects today’s
facilities from costly downtime and equipment damage caused by routine or catastrophic electrical disturbances.
The ISMTM contains individual thermally fused and protected MOVs, surge-rated copper busing, robust filtering and
advanced remote communications capabilities.

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CURRENT TECHNOLOGY®ISMTM INTEGRATED SUPPRESSION MODULE
Guide to Installation
and Assistance
Thank you for choosing Current Technology’s ISM Surge Suppression System.
We look forward to fulfilling your facility wide surge suppression filter system
needs.
Should you have questions about installing the ISM surge
suppression system please call Monday through Friday 8:00 a.m.
to 5:00 p.m. (EST): 800.238.5000 or 804.236.3300. Or email us at
[email protected]
This manual provides guidelines for the proper installation of the ISM surge
suppression system. Proper product selection and compliance with these
guidelines will help your new suppression system provide years of reliable
service. If installers are unsure about the facility’s electrical configuration or
have other installation related questions, it is recommended they consult a
master electrician or other qualified electrical professional.
When shortcuts are taken or installation procedures are not followed, the ISM
system may be damaged or may not provide adequate protection. Improper
installation may also void the warranty. It is extremely important to follow these
installation procedures carefully.
Today’s sophisticated electronic equipment requires superior suppression filter
systems. By selecting Current Technology®devices, you have taken a critical
step toward decreasing downtime and ensuring longer product life for your
equipment.
The ISM Surge Suppression System is designed to be connected to your
electrical distribution system to protect connected sensitive electrical and
electronic equipment against the harmful effects of lightning strikes, internally
generated transients and high frequency noise. The reliable ISM is listed as a
Type 4 component assembly suitable for use in Type 1 or Type 2 applications
per UL 1449 3rd Edition.
The Current Technology®ISM combines easy and flexible installation with many
special features to deliver more performance than any other device in
its class.

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CURRENT TECHNOLOGY®ISMTM INTEGRATED SUPPRESSION MODULE
Guide to Installation &
Assistance
(Continued)
W A R N I N G !
HAZARDOUS VOLTAGES PRESENT: Improper installation or
misapplication may result in serious personal injury and/or damage
to electrical systems. Read the complete installation instructions
before proceeding with installation. Remove all power to the
electrical panel before installing or servicing the surge protective
device (SPD).
W A R N I N G !
IMPORTANT SAFETY INSTRUCTIONS: All work must be performed
by licensed and qualified personnel. The electrical system must be
properly grounded in accordance with the U.S. National Electrical
Code, state and local codes or other applicable codes for this SPD
to function properly. This device is suitable for installation where the
available short circuit current is 200,000 rms symmetrical amperes
at 600VAC or less.
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The ISM offers a full range of monitoring options when connected to an
optional monitoring package from the most sophisticated power quality
monitoring features offered in any surge suppression product. These features
include the following:
• Display of true RMS phase voltages
• Display of neutral-to-ground voltage
• Counting of swells, surges, sags and outages
• Display of percent available protection remaining
The Integrated Suppression Module incorporates individual thermally fused
and protected MOVs, thus preventing individual component failure from
rendering the protection mode useless. Instead, the failed component safely
removes itself from the circuit and all remaining protection is allowed to
continue operating as designed.

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CURRENT TECHNOLOGY®ISMTM INTEGRATED SUPPRESSION MODULE
Before Beginning
Confirm that the voltage(s) and service configuration shown on the ISM product
label are consistent with the voltage and service configuration of the system
to which it is being attached. Verify that the power system operating frequency
is between 47-63 Hz. A model number is printed on the label that is included
with the ISM. Each model number corresponds to the voltage and service
configurations per sample model number scheme in Table 1:
Pre-Installation Checklist ✓
W A R N I N G ! THE ISM WARRANTY IS VOIDED if the unit is
damaged as a result of improper installation or the installer’s failure
to verify the following conditions prior to installation.
W A R N I N G ! Do not HIPOT the ISM unit or the electrical system
to which the ISM unit is connected without disconnecting the ISM
conductors including phases, neutral and ground.
kA Rating
Available ISMTM kA Ratings:
050, 080, 100, 125, 150, 200,
250, 300
Voltage*
208 120/208
240 120/240
380 220/380
480 277/480
600 347/600
Configuration*
1G 1-Phase, Grounded
2G 2-Phase, Grounded, Split-Phase
3Y 3-Phase, Grounded, Wye
3R 3-Phase, Grounded,
High-Resistance
3H 3-Phase, Grounded,
High-Leg Delta
3D 3-Phase, Grounded, Delta
Filter
F EMI/RFI Filter (Type 1 SPD)
F3 UL1283 Filter (Type 2 SPD)
No Filter if Blank
Stand-Alone Options
(Ordered As Separate Items)
DTS DTS-2 Diagnostic Test Set
HPI HPI Cable
Stand-Alone Monitoring Options
M1X LED/Phase + Audible Alarm,
Dry Relay Contacts
M2X M1 + Surge Counter
M3X Advanced Monitoring,
Character Display, Modbus RTU
M4EX M3 + Ethernet, Modbus TCP
M5X Advanced Monitoring,
Graphics Display, Modbus RTU
M6EX M5 + Ethernet, Modbus TCP
E.g.: ISM-300-240-3D-F
SAMPLE MODEL NUMBER SCHEME (ISM)
An area on the back cover of this manual is allocated to log your ISM
model number, purchase date, installation date, and installer
*Consult factory for additional Voltage/Configuration options.
ISM — 300 — 240 — 3D — F
Model
kA Rating
Voltage
Configuration
Filter Option
Table 1: Sample Model Number Scheme (ISM)

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CURRENT TECHNOLOGY®ISMTM INTEGRATED SUPPRESSION MODULE
W A R N I N G !
Discontinue installation if (1) your conditions are inconsistent with
the checklist above or (2) your conditions cannot be verified. Call
Thomas & Betts Power Solutions’ Technical Support at 800.238.5000
if you have any questions.
Check to ensure that a proper neutral-ground bond is installed between the
neutral and ground terminals at the transformer upstream from all 3-Phase
WYE, 3-Phase High-Leg DELTA, or 1-Phase SPLIT-PHASE ISM devices
(see NEC article 250.) Lack of a proper bond will damage the ISM and void
the warranty.
Confirm that the environmental conditions are consistent with the
following ranges:
• Ambient Temperatures: The ISM must be installed in an area with a
temperature between -40° and +140°F (-40° and +60°C).
• Humidity: The ISM must be installed in an area with relative humidity
between 5% and 95% non-condensing.
• Altitude: The ISM must be installed in a location where the altitude is
below 13,000 feet.
Pre-Installation Checklist ✓
This device features an internal protection that will disconnect the
surge protective component at the end of its useful life but will
maintain power to the load now unprotected. If this situation is
undesirable for the application, follow the manufacturer’s instructions
for replacing the device.
The ISM is a Type 4 component assembly which is suitable for use in both
Type 1 and Type 2 SPD applications. It may be installed on the line or load
side of the main service disconnect. The ISM is a one-port SPD and is to be
connected in parallel with the electrical system. It may be connected via a
circuit breaker, molded case switch, fused switch, or connected directly to the
bus of the panelboard or switchboard it is protecting. If direct bus connection
is used, Current Technology®
, recommends that the ISM be installed with a
disconnect switch.
End-use regulatory compliance is the responsibility of the end user.
Consult the factory for regulatory Conditions of Acceptability.
Installation Methods
(For the design engineer and the
installer)
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continued

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CURRENT TECHNOLOGY®ISMTM INTEGRATED SUPPRESSION MODULE
Figure 2
3-Phase, 3-Wire DELTA
Figures 1-4 show the electrical relationship between the ISM and these four
basic service configurations: WYE, DELTA, High-Leg DELTA and SPLIT-PHASE.
Service Configurations
Figure 1
3-Phase, 4-Wire WYE
B
N
CA
N
G
XoBOND
EARTH
GROUND
C
B
A
N
G
LOAD
ISM Unit
TM
NBAGC
LOAD
ISM Unit
TM
BA GC
G
EARTH
GROUND
CA
B
C
B
A
G

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CURRENT TECHNOLOGY®ISMTM INTEGRATED SUPPRESSION MODULE
Figure 3
3-Phase, 4-Wire High-Leg DELTA
Figure 4
1-Phase, 3-Wire SPLIT-PHASE
N
G
XoBOND
EARTH
GROUND
N
G
LOAD
ISM Unit
TM
NB*A GC
CA
N
B*
C
B
A
*NOTE: HIGH LEG MUST BE B PHASE
N
L2 L1
L2
L1
N
G
Xo BOND
EARTH
GROUND
N
G
LOAD
ISM Unit
TM
NA GC
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9
CURRENT TECHNOLOGY®ISMTM INTEGRATED SUPPRESSION MODULE
Plan Your Installation ✓
Conductor Sizing and
Overcurrent Protection
Model Use conductor lengths
less than 10 feet
Max Torque
(in-lb)
ISM-050 #6 AWG 45
ISM-080 #6 AWG 45
ISM-100 #6 AWG 45
ISM-125 #2 AWG 50
ISM-150 #2 AWG 50
ISM-200 #2 AWG 50
ISM-250 #2 AWG 50
ISM-300 #2 AWG 50
NOTE: Table 2 conductor sizing recommendations ensure that the effective
clamping voltage of the ISM at the point of connection is kept to a minimum
in order to maximize protection. Use solid or stranded copper or aluminum
conductor with strip length of 0.5".
Overcurrent Protection: When used as a Type 1 SPD, the ISM does not
require upstream over current protection for safe operation, however, the
design may require or the installer may choose to connect the ISM to a circuit
breaker, molded case switch or fused disconnect.
If a breaker or molded case switch is used for connecting the phase
conductors, Current Technology®recommends a 100 amp rating.
Table 2: Maximum Recommended Conductor Size
W A R N I N G ! The performance of the ISM will be severely
limited if the conductors are too long, are of too small a wire gauge,
have too many bends, or have sharp bends.
These factors should be addressed during the design of an installation to
ensure that there is a suitable place reserved for the stand-alone ISM next
to its point of connection to the panelboard it is protecting. The selected
mounting location should ensure short conductor runs and a minimum of
bends. If bends are required they should be sweeping bends. Do not make
sharp 90° bends for aesthetic purposes.
Conductor Length and Sizing: Conductor length must be kept as short as
possible and avoid sharp bends. The following conductor sizes for phase,
ground and neutral connections are recommended.

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CURRENT TECHNOLOGY®ISMTM INTEGRATED SUPPRESSION MODULE
Removal is accomplished by pulling the green jumper from the connector on
the ISM.Once removed, the jumper should be placed in the clear vinyl pocket
containing the unit test data for future use if desired (Figure 5).
Connector on ISMTM
Neutral to Ground Jumper
Removed from ISMTM
W A R N I N G ! Prior to proceeding, ensure the SPD unit does not
have voltage applied to its input terminals.
ISM models equipped with an EMI filter system (“-F” suffix), and have a
neutral connection, come with a green jumper wire that loops out of the
3-pin connector on the ISM and connects a filter neutral to ground. In certain
medical applications, or circuits which employ GFCI protection, this Neutral to
Ground filter connection should be removed.
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Neutral to Ground Filter
Jumper
Figure 5