TVSSFES-155

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March, 2001 Page 1 of 6

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INSTRUCTIONS:THE Wall Mounting Series

TRANQUELLHigh Exposure

TRANSIENT VOLTAGE SURGE SUPPRESSOR

WARNING: The equipment covered

by these instructions should be

installed and serviced only by

competent 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.

PRODUCT DESCRIPTION

The GE TRANQUELL High Exposure WallMount devices are Transient Voltage Surge

Suppressors (TVSS), which provide metal

oxide varistor protection in each mode,

combined with thermal fuses, surge-rated

fuses, indicating lights, an audible alarm with

test and disable features, Form C contacts for

remote monitoring, surge counter, built in

disconnect switch and EMI filtering. These

units are intended solely for wall mount

installations on low voltage electrical

distribution equipment. The THE is available

in both a molded Poly-Fiberglass NEMA 4X

enclosure and a Painted Steel enclosure. The

TVSS is UL and cUL Listed E108159,

conforming to UL standards 1283 and 1449Second Edition, August 15, 1996. All ratings

are in accordance with ANSI / IEEE C62.41-

1991 and NEMA LS1-1992 recommended

practices.

APPLICATION GUIDELINESDetermining the surge protection to be

provided in a facility or for a particular system

or equipment can be a complex problem which

should be addressed as early as possible, such

as when a facility is constructed or sensitive

equipment is installed. Often, solutions aresought after problems occur. The following

guidelines are offered for application

assistance.

1. 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 manufacturers

instructions.

2. Utilize the personnel from your local

utility, your engineering department, GE

application or service engineering, or a

competent consulting engineering firm for

technical guidance or troubleshooting.

3. Understand your system, and the

capabilities and limitations of surge

protectors and other power conditioning

equipment.

4. WARNING: Only competent, trainedpersonnel using proper safety

procedures should install surge

protection equipment. Improper

installation can defeat the protective

function of a surge protector, as well as

cause serious bodily injury, death or

property damage.

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5. Select the proper TRANQUELL HighExposure Series unit for your system

voltage, configuration, and the anticipated

surge environment.

MCOV (Maximum Continuous Operating Voltage)This value, defines the maximum line-to-

line or line-to-neutral continuous voltageto be applied to the protector. If sustained

voltage could exceed MCOV, or if any

unusually high power frequencies or

Temporary OverVoltages (TOV) are

anticipated, contact your GE Sales

Engineer for assistance.

ConfigurationProtectors are available for single phase

with neutral and ground, for three-phase

wye with neutral and ground, or for three-

phase delta with ground. (see figure 1)Connections

It is important to minimize lead lengths for

optimum protection. Larger wire sizes

and twisted connections will further

enhance the level of protection. The

recommended installation wire size for the

TRANQUELLHigh Exposure TVSS is 6-awg minimum.

Peak Impulse RatingPeak surge current capability is an

important characteristic for a TVSS. Therating per mode should equal or exceed

the maximum surge expected in service.

6. No protector can survive a direct lightning

strike. A strike close to any protector,

which subjects the device to surge current

or energy duty in excess of its capability,

can also fail the protector. Power

frequency overvoltages in excess of the

Maximum Continuous Operating Voltage

capability or temporary power frequency

overvoltages, which exceed the magnitude

or duration of the protectors Temporary

OverVoltage characteristics, can fail the

unit. Should the TRANQUELL HighExposure TVSS be subjected to any of the

above excess duty conditions, it will

normally fail as a short circuit. Fuse

protection will remove the short circuit

from the line, and indicators will signal

damage to the unit.

7. Increased rate of rise and higher surge

current magnitudes both result in some

increase in discharge voltage. Conditions

can occur where the withstand capability

of the protected equipment is exceededeven though the surge protector is doing its

job and clamping the surge. In these cases

additional low voltage protection may be

required, located as close as possible to the

sensitive equipment.

8. TRANQUELLHigh Exposure Series wye-connected units have both, normal mode

(line-to-neutral and line-to-ground) and

common mode (neutral-to-ground)

protection. Protection between neutral andground is provided on units designed for

wye-connected applications. On grounded

neutral systems, common mode protection

is needed if the neutral-to-ground bond is

made more than 10 feet from the surge

protector. This will minimize neutral-to-

ground potential during a transient,

avoiding high transient voltages, which

could reduce protection and cause possible

damage to the system or to the equipment.

Common mode protection may also beused when the neutral-to-ground bond is

within 10 feet. TRANQUELL HighExposure Series delta-connected units

have normal mode (line-to-ground)

protection.

9. Should the TRANQUELL High ExposureSeries fail, it will fail shorted. The TVSS

has a fuse in each phase that will remove a

failed protector from the circuit without

interrupting power to the protected

equipment. A special current-limiting fuse

is utilized to withstand expected surge

currents yet still disconnect the protector in

the event of a failure. WARNING: For

this reason, in the event of fuse

operation, replace both the fuse andthe

protection module. DO NOT ATTEMPT

TO REPLACE THE FUSE ONLY.

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VOLTAGE RATINGS & POWER SOURCE CONFIGURATIONS

ModelNominal Voltage

(50/60Hz)System Configuration Source Configuration

THE120S

(all model types)

120/208-240V Single Phase, 3W+G

THE120Y

(all model types)

THE277Y

(all model types)

120/208V

277/480V

Three Phase Wye, 4W+G

THE240D

(all model types)

THE480D

(all model types)

240V

480V

Three Phase Delta, 3W+G

A

B

C

EARTH

THE240H

(all model types) 120/240V Three Phase Delta Hi-Leg, 4W+G

B

ACN

Figure 1

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INSTALLATION

WARNING: POWER MUST BE PROVEN DISCONNECTED BEFORE STARTING

INSTALLATION, INSPECTION OR MAINTENANCE! FAILURE TO

DO SO MAY CAUSE SERIOUS INJURY, DEATH AND/OR

PROPERTY DAMAGE.

Figure 2

TVSS Wiring Locations

Notes:*On all models that are THE240H types, Phase B will be the High Leg connection

point.

** On all models that are THE120S types, Phase B will be located and marked at the

Phase C location show above. There will be no Phase C on this model type.

*** Neutral will not be provided on THE240D and THE480D model types.

Neutral Phase APhase BPhase C

Ground

Surge Counter

Sensitivity

Remote Alarm

Contacts

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WARNING: The TVSS device must be

installed in accordance with all national and

local electrical codes. Refer to the nameplate

to verify that the ratings are appropriate for the

installation.

1. The TRANQUELL High Exposure WallMount TVSS is designed to be installed

adjacent to the primary electrical service

distribution panel. These instructions shall

be considered as the general guidelines to

insure that the TVSS is installed safely,

while providing the maximum amount of

surge protection available. Before making

connections to the unit, verify that the unit

model number and nameplate voltage

rating are appropriate for connection to theintended power source. (Refer to Figure 1).

2. Although the TVSS is rugged, reasonable

care must be taken to avoid damage to the

unit during handling and installation.

3. Depending on the type specified, the TVSS

will come housed in a Painted Steel, or

Poly-Fiberglass enclosure. The enclosure

can be easily punched or drilled for

installation purposes. .

4. The unit should be installed using the

stainless steel mounting brackets supplied

with the fiberglass enclosure, or with the

existing mounting feet on the painted steel

enclosure. The TVSS enclosure can be

secured to any smooth, flat surface and

oriented in any vertical or horizontal

position that allows easy access to the

disconnect switch and panel door.

5. The TVSS should be installed as close as

possible to the electrical power source. Ifconduit must be used, non-metallic conduit

is recommended in order to maintain

optimum performance.

6. All TRANQUELLHigh Exposure units are

suitable for installations on supplies

capable of delivering up to 200,000

symmetrical rms amperes. The TVSS

should be installed on the protected side of

the main overcurrent protector.

7. Extreme care must be taken to ensure that

power wiring connections are correct, and

that sound neutral and ground locations areprovided. Improper connections may result

in higher transient voltages, which could

result in damage to the system and/or to the

equipment being protected. Refer to

Figure 2 for wire connection locations.

(These locations are also marked on the

TVSS unit.)

8. All Phase, Neutral, and Ground

connections shall be done with number 6

awg stranded copper wire minimum.

Larger wire gauges will enhance TVSS

performance. The TRANQUELL High

Exposure TVSS incorporates lugs that will

accommodate up to 2/0 wire gauge sizes.

9. All phase, neutral and grounding wires

routed between the electrical distribution

equipment and the TVSS should be made

as short as possible. TVSS wiring

installations should also be such that sharp

bends are avoided. Excessive wire length,

sharp wire angles, and mechanical splicejoints will degrade the performance of the

TVSS significantly.

10. Two terminal strips are provided on the

back of the TVSS assembly. One is for

connecting remote status monitoring

equipment. The 3 position terminal strip is

used for this feature. (Refer to Figure 2).

Terminal contacts are provided as .187

kwik disconnect tab types and are labeled

COM (COMMON), NO (NORMALLYOPEN), and NC (NORMALLY CLOSED).

They are rated for 125VAC, maximum-

switched current 2A; maximum-switched

power 60W or 125VA.

11. The other terminal strip, a 4-position type,

is used for adjusting the sensitivity of the

surge counter. The surge counter

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sensitivity jumper setting is pre-set at the

factory to provide high sensitivity to any

transient surge activity that has been

suppressed by the TVSS. The default

jumper location on the terminal strip is

between COMMON and S3. In order

to reduce the sensitivity, connect thejumper between the COMMON stab

contact and the tab contact marked S1

(for medium sensitivity) or to S2 (for

low sensitivity).

12. When energized the power panel will now

have surge-suppressed and EMI-filtered

power.

OPERATION

WARNING: POWER MUST BE PROVEN

DISCONNECTED BEFORE INSPECTION

OR MAINTENANCE IS ATTEMPTED.

FAILURE TO DO SO MAY CAUSE

SERIOUS INJURY, DEATH AND/OR

PROPERTY DAMAGE.

The TRANQUELL High Exposure TVSS is a

solid-state device that utilizes ZnO varistors.

There are no gaps, no moving parts.

When the TVSS is in service under normal

conditions, the green LED indicating lights areilluminated to indicate that the fuses are not

blown and surge protection is active.

The surge counter will respond to and record

surges via a current transformer in the neutral

circuit (or, in a delta configuration, the ground

circuit). The counter may be reset to zero if

desired.

Should a fuse blow, its green indicating LED

will extinguish, the red alarm LED will be

illuminated, the audible alarm will sound, and

the remote contacts will indicate this change of

status. The audible alarm may be silenced by

pressing the switch into the DISABLE

position. The red alarm LED will continue to

be illuminated after the audible alarm is

disabled.

A fuse will blow if the surge protector fails

shorted. Whenever the TVSS indicates an

alarm condition, it is recommended that the

protection module be replaced. Always check

the system for overvoltage conditions before

installing a new surge protector.

GE-ACT Communications, Inc.

GE Industrial Systems

2501 Pecan Street

Bonham, Texas 75418 USA

TRANQUELL is a registered trademark of

General Electric Company

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TVSSFES-155