GE Industrial Solutions TR7000 User Manual
GE Digital Energy
Power Quality
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
GE TR7000 Series Wall Mounted Medium and High Exposure
Surge Protective Devices (SPDs)
2020004602 (12/10) Page 1 of 17
TABLE OF CONTENTS
IMPORTANT NOTICE………………………………………………………………………………………………………………………………………..3
Transformer X0 Bond Warning Statement………………………………………………………………………………..3
PRODUCT DESCRIPTION…………………………………………………………………………………………………….…….…………………….4
APPLICATION GUIDELINES…………………………………………………………………………………………………….………….….……….4
SPD Type…………………………………………………………………………………………………………………………………………….4
Maximum Continuous Operating Voltage (MCOV)……..……………………………………………..…………….5
Electrical System Configuration…………………………………………………………………………….………….……..….5
Peak Impulse Rating………………………………………………………………………………………………………………….…….5
UL 1449 Nominal Discharge Current (In)……………………………………………………………………………………5
Short Circuit Current Rating…………………………………………………………………………………………………….…….5
Environmental Ratings……………………………………………………………………………………………………………………5
PRE-INSTALLATION REQUIREMENTS………………………………………………………………………………………………….……….6
System Configuration and Voltage……………………………………………………………………………….…………….6
System Grounding and Bonding……………………………………………………………………………..……….….………6
SPD Installation on Ungrounded Power Systems……………………………………………………………………6
SPD Location / Primary Overcurrent Protection…………………………………………………..…………..……..7
VOLTAGE RATINGS AND POWER SOURCE CONFIGURATIONS………………………………….………..………………..7
NEC COMPLIANT GROUNDING AND BONDING EXAMPLE…………………………………………………………...……….8
INSTALLATION…………..………………………………………………………………………………………………………………………..……………9
Mounting……………………………………….……….……………………..……………………………………………………….…………..9
Dimensions and Recommended Conduit Entry Locations……………………………………………………9
INSTALLATION (cont.)…………………………………………………………………………………………………………………………………...12
Power Connections ………………………………………………………………………………………………………………………12
Wire Routing …………………………………………………………………………………………………………………………………..12
Circuit Breaker ……………………………………………………………………………………………………………………………….12
Remote Alarm Contacts…………………………………………………………………………………………………….…………12
SPD Disconnect Switch………..………………………………………………………………………………………………….……12
Pre-Energization Check………………………………………………………………………………………………………..………12
POWER TERMINALS AND REMOTE ALARM LOCATION DIAGRAM…………………………….………..………..……13
INSTALLATION EXAMPLE DIAGRAM………………………………………………………………………………………………………….14
OPERATION……………….……………..…………………………………………………………………………………………………….……………….15
Line Status Indicators……………………………………………………………………………………………………………………15
Alarm Status Indicators………………………………………………………………………………………………………………..15
Remote Alarm Contacts……………………………………………………………………………………………………………….15
Test / Enable / Disable Switch…………………………………………………………………………………………………….15
Surge Counter LCD……………………………………………………………………………………………………………………..…15
MAINTENANCE………………………………………………………………………………………………………………………………..…………..…16
SERVICING / TROUBLESHOOTING…………………………………………………………..……………………………………..………...16
2020004602 (12/10) Page 2 of 17
Y THAT A PROPER
HEN POWER IS
SFORMER OR ANY OTHER
D PER ARTICLE 250.30
ULT IN ELEVATED
S. THESE
ENT AS
LECTRICAL SHOCK,
IMPORTANT NOTICE
THE ENTIRE CONTENT OF THIS MANUAL MUST BE READ AND FULLY UNDERSTOOD
BEFORE ATTEMPTING ANY INSTALLATION OR ENERGIZATION OF THE SPD.
If there are any questions about the operational status, or integrity of the electrical system prior to
installation of the SPD, please consult a qualified trained electrician before attempting to continue.
If the minimum requirements of this manual are not followed, the SPD could become irreversibly
damaged, and/or the electrical system and connected loads could be left unprotected.
Choosing the right product for the application, along with correct installation methods, as defined
within this manual, will allow the GE TR7000 SPD to provide the best possible protection for many
years.
Failure to comply with the applicable requirements of this manual can void the SPD warranty.
SPECIAL ATTENTION MUST BE GIVEN TO VERIF
NEUTRAL-GROUND (XO) BOND HAS BEEN MADE W
SUPPLIED FROM AN UPSTREAM TRAN
TYPE OF SEPARATELY DERIVED POWER SOURCE.
FAILURE TO PROVIDE THIS BOND, AS REQUIRE
OF THE NATIONAL ELECTRICAL CODE, CAN RES
PHASE TO GROUND SOURCE VOLTAGE POTENTIAL
VOLTAGES CAN CAUSE DAMAGE TO ELECTRICAL EQUIPM
WELL AS SAFETY HAZARDS INCLUDING FIRE, E
SERIOUS INJURY, OR DEATH.
WARNING
2020004602 (12/10) Page 3 of 17
PRODUCT DESCRIPTION:
GE TR7000 Series are Type 2 Surge Protective Devices (formerly called TVSS), designed for
installation on low voltage electrical distribution systems. GE SPDs are designed to protect
electrical equipment loads against the damaging effects of transient voltages that can be
induced or generated as a result of remote lightning, power equipment switching or high
frequency disturbances.
The TR7000 Series SPDs incorporate Metal Oxide Varistor (MOV) technology to achieve superior
transient suppression performance. Integral to the SPD is a patented thermal fusing system that
offers SPD circuit interruption in the event of an abnormal phase overvoltage condition. Other
standard features include surge rated fuses, protection status indicating lights, an audible alarm
with test and disable features, form C alarm contacts for remote monitoring, a surge event
counter, and built in EMI filtering. A surge rated disconnect switch is comes standard on select
models.
The GE TR7000 SPD units described in this manual are enclosed, wall mounted styles that are
UL/cUL Listed, conforming to UL 1283 and UL 1449 3rd Edition where applicable. All published
ratings are in accordance with ANSI / IEEE C62.41.1-2002, C62.41.2-2002 and NEMA LS1-1992
(R2000) recommended guidelines.
Model covered by this manual are:
TR7000 model types ending with the part number suffix of WMN1D, WMN12S, WMN12F, WMN4D,
WMN4S and WMN4X. (Example: TR7277Y200WMN12S)
APPLICATION GUIDELINES:
Determining the surge protection to be provided in a facility or for a particular system or
equipment can be a complex task that should be addressed as early as possible. This is typically
when a new facility is constructed or sensitive electronic equipment has been installed. The
following guidelines are offered for application assistance:
Prior to installing any SPD, ensure that your facility electric supply system is properly
installed and connected in accordance with all applicable national and local codes and
safety procedures. All equipment and systems should be installed in accordance with
manufacturer’s instructions.
Utilize the personnel from your local utility, your engineering department, GE application or
service engineering, or a professional consulting engineering firm for technical guidance or
troubleshooting.
Understand your system, and the capabilities and limitations of SPD and other power
conditioning equipment.
Select the proper GE TR7000 Series SPD unit for your system voltage, configuration, and the
anticipated surge environment. Some of the key parameters for selection are defined below:
SPD TYPE
The SPDs covered in this document are rated and marked accordingly for use on Type 2
applications. Type 2 SPDs can be installed only on the load side of the electrical distribution
system’s main breaker or fuse.
2020004602 (12/10) Page 4 of 17
MAXIMUM CONTINUOUS OPERATING VOLTAGE (MCOV)
This value defines the maximum line-to-line or line-to-neutral continuous AC voltage that can be
safely applied to the protector. MCOV levels for GE TR7000 Series SPDs are set at 115% of nominal
system voltage. For 120-volt AC systems, the MCOV is 125%. If there is a risk that the electrical
system voltage could exceed MCOV, or if any unusually high power frequencies, Temporary Over
Voltages (TOV), or phase swells are anticipated, contact your GE Sales Engineer for further
assistance.
ELECTRICAL SYSTEM CONFIGURATION
Protectors are available for single (split) phase with neutral and ground, three-phase grounded WYE,
three-phase ungrounded WYE, three-phase high-leg delta, and for three-phase ungrounded delta
systems. (See page 7 for power source configurations)
PEAK IMPULSE RATING
Peak surge current capability is an important characteristic for a SPD. The rating per mode should
equal or exceed the maximum surge expected in service. GE TR7000 wall mount SPDs are available
in maximum surge ratings of 65kA, 80kA, 100kA, 125kA, 150kA, 200kA and 300kA.
UL 1449 NOMINAL DISCHARGE CURRENT (In)
The UL Nominal Discharge Current (In) rating should be considered when an SPD is selected for use
within a UL96A Lightning Protection System. UL96A requires a Nominal Discharge Current (In)
rating of 20kA for Type 1 or Type 2 SPDs.
SHORT CIRCUIT CURRENT RATING
GE TR7000 Wall Mounted SPD units are UL certified for use on electrical systems with rated
ampacities up to 200,000 symmetrical amperes when installed behind a circuit breaker rated 60A.
ENVIRONMENTAL RATINGS
NEMA Ratings of 1, 4, 4x, and 12 are available. Please refer to the model number suffix to verify the
correct enclosure for the application. The SPD is designed to operate within an ambient
temperature range of –40C (-40F) to +65C (+149F) with a relative humidity level between 0-95%
non-condensing.
A direct lightning strike, that occurs within close proximity of an installed SPD, can result in
surge currents that exceed the SPD’s energy handling capability. This can result in reduced
life expectancy or pre-mature failure of the SPD. Electrical power system supply voltages in
excess of the SPD MCOV rating, can also cause SPD failure.
Should a condition occur that results in premature failure of the SPD, the suppression
circuitry will short, allowing the integral fusing to interrupt current flow through the SPD
without disrupting power to the protected equipment. In the event of limited available fault
currents, the 60A breaker will operate to remove the SPD. Fault currents of less than 60A will
be interrupted by the integral thermal fusing. In each case the SPD will be removed from the
power system and the load equipment will remain unprotected from subsequent surge
activity until the SPD is replaced.
Increased rate of rise or higher surge current magnitudes can result in increased surge let-
thru levels due to the non-linear clamping characteristics of SPDs. Conditions can occur
where the surge withstand capability of the protected equipment is exceeded even though
the SPD is functioning properly. In such cases, additional SPDs may be required, located
closer to the sensitive load(s). (For additional information, refer to Standard IEEE 1100-2005,
Section 3.4.3)
GE TR7000 Series WYE-connected units have both normal mode (L-N, L-L) and common
mode (L-G, N-G) protection. Protection between neutral and ground is provided on units
designed for WYE-connected applications.
2020004602 (12/10) Page 5 of 17
WARNING
SPD A
ND VOID THE PRODUCT
WARRANTY.
PRE-INSTALLATION REQUIREMENTS:
Prior to energization of the GE TR7000 SPD, it is critical that the following items have been
addressed.
DO NOT ATTEMPT TO ENERGIZE THE SPD OR CONTINUE WITH THE INSTALLATION IF
ALL OF THESE CONDITIONS HAVE NOT BEEN MET, OR ARE UNKNOWN.
1. SYSTEM CONFIGURATION AND VOLTAGE
Check the configuration and voltage supply ratings to ensure that the proper SPD model
number has been selected for your system. The SPD model number can be found on the UL
label affixed to the SPD NEMA Enclosure. The SPD selection can be verified by comparing the
Model Number to the correct electrical system described in the “VOLTAGE RATINGS & POWER
SOURCE CONFIGURATIONS” chart shown on page 7.
THE EQUIPMENT COVERED BY THESE INSTRUCTIONS SHOULD
BE INSTALLED AND SERVICED ONLY BY COMPETENT,
QUALIFIED PERSONNEL UTILIZING PROPER SAFETY PRACTICES
AND PROCEDURES THESE INSTRUCTIONS ARE WRITTEN FOR
SUCH PERSONNEL AND ARE NOT INTENDED AS A SUBSTITUTE
FOR ADEQUATE TRAINING AND EXPERIENCE IN SAFE
PROCEDURES FOR THIS TYPE OF EQUIPMENT.
2. SYSTEM GROUNDING AND BONDING
Verify that a NEC (National Electrical Code) compliant X0 bond has been made at the
upstream transformer or other separately derived system that feeds the SPD. Per NEC
Article 250.30, this bond must be in place on all 3-Phase WYE, 3-Phase Hi-Leg Delta, and
Single Phase Split-Systems. Refer to page 8 for an example of an installation that complies
with these NEC recommendations.
WARNING
FAILURE TO PROVIDE THE X0 BOND WILL DAMAGE THE
Verify that there have not been multiple instances of Neutral to Ground bonds on the
electrical system. These bonds, while either intentional or accidental, result in Ground
currents that can create differential voltage potentials between Neutral and Ground.
Redundant Neutral to Ground connections can result in damage to the SPD and are in
violation of NEC.
3. SPD INSTALLATION ON UNGROUNDED POWER SYSTEMS
Ungrounded power systems are inherently unstable and can produce excessively high lineto-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 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.
2020004602 (12/10) Page 6 of 17
4. SPD LOCATION / PRIMARY OVERCURRENT PROTECTION
Per the National Electrical Code (NEC Article 285), Type 2 SPDs may be placed only on the
load side of the main service breaker or fuse at each utility service entrance or separately
derived power system.
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