This kits are provided for installation of ATVS Tranquell
and Tranquell VII transient-voltage surge suppressors in
Spectra bolt-on and plug-in panels and switchboards. The
catalog numbers and descriptions of the available units
are listed in Table 1. The K suffix denotes field-installable
kits. The catalog number for the mounting and cover kit is
ATVSHK.
5
All TVSS units are 7x (9
equipment width is 27-inch wide Spectra panelboard or
35-inch wide Spectra switchboard
Table 1. Catalog numbers and specifications for Tranquell transient-
Voltage, Vac Configuration
voltage surge suppressor kits.
/8") high and the minimum
System
Surge
Current per
Mode, kA
Installation
WARNING: Danger of electrical shock or injury.
OFF
Turn
switchboard before workin
e
ment or removing any component.
Equipment is to be installed and maintained b
properly trained and qualified personnel only.
The numbers in brackets in the text and circled in the
figures refer to the items in Tables 1 and 2.
1. Confirm the contents of the kit. Figure 1 illustrates the
contents of the kit, with the parts listed in Table 2.
Figure 2 illustrates the hardware included in the kit
([2] in Table 2), with the parts listed in Table 3.
40W, 44W, 45W
5Mounting plate208C4326P11
6Cover for 27W, 31W, 35W208C4331P11
7Cover for 36W, 40W208C4331P21
8Cover for 44W, 45W208C4331P31
9Cover support for 27W, 31W252B1477P44
10-32x
24 Conical spring washer, 1/4"75A105503P1013
25 Conical spring washer, 3/8"75A105503P1023
26 TVSS instruction sheetDEH2231
27 Nut, 1/4-20N245P21B63
28 Nut, 3/8-16N245P25B63
29 Carriage bolt, 1/4-20 x 2"N657P21032B63
30 Carriage bolt, 3/8-16 x 2"N657P25032B63
7
/16"
192A6976P18924
Table 3. Parts list for the hardware package [2].
Figure 3. Top view of a bolt-on interior.
Figure 4. Bolt-on and single-bus plug-in assemblies.
2. Install TVSS-bus cable assembly. (For connecting a
TVSS to a disconnect, go to step 2.)
• Bolt-on and single bus of plug-in assemblies, switchboard
panels, and powerpanel. Before installing, locate the
side of the panel interior for which the dimension
from the nearest vertical bus face to the inner face
of the bus support rail is 2.75 inches, as indicated
in Figure 3. The cable terminals will be mounted
on this side of the bus.
1
For each phase install a
/4-20 x 2" carriage bolt
[29] into a .281-inch square hole of the interior
vertical bus, as shown in Figure 4. Use the
5
uppermost holes in the 7X (9
/8") space that the
TVSS unit can reach. Slide a terminal of the cable
assembly [21] onto each carriage bolt and rotate it
so that the terminal barrel is located below the front
1
edge of the vertical bus. Install a
1
[24] and a
/4-20 nut [27] onto each bolt and
/4" spring washer
tighten to 75 in-lb.
• Plug-in assemblies, switchboard panels, and panelboardswith .281-inch square holes available (double bus). For
each phase, slide a spacer [22] between the vertical
1
bus bars and install a
/4-20 x 2" carriage bolt [29]
into a .281-inch square hole located towards the
front of interior vertical bus, as shown in Figure 5.
5
Use the uppermost holes in the 7X (9
/8") space
that the TVSS unit can reach.
Figure 5. Plug-in assemblies with .281-inch square holes.
Slide a terminal of the cable assembly [21] onto
each carriage bolt and rotate it so that the terminal
barrel is located below the front edge of the vertical
1
bus. Install a
/4" spring washer [24] and a 1/4-20
nut [27] onto each bolt and tighten to 75 in-lb.
• Plug-in assemblies and powerpanels without .281-inchsquare holes (double bus). For each phase, slide a
spacer [22] between the vertical bus bars and
3
install a
/8-16 x 2" carriage bolt [30] into a .406inch square hole located towards the rear of
interior vertical bus, as shown in Figure 6. Use the
5
uppermost holes in the 7X (9
/8") space that the
TVSS unit can reach. Slide a terminal of the cable
assembly [21] onto each carriage bolt. Install a
3
spring washer [25] and a
/8-16 nut [28] onto each
3
/8"
bolt and tighten to 200 in-lb.
2
Page 3
Figure 6. Plug-in assemblies without .281-inch square holes. (Interior
spools are not shown for clarity.)
3. Install barrier. Route the cable assemblies through the
rectangular holes in the barrier [3]. Secure the barrier
7
to the side of the “Z” rail with 10-32x
/16" threadforming screws [23], as shown in Figure 7 and tighten
to 22 in-lb.
4. Mounting plate. Route the cable assemblies through
the oblong slot in the mounting plate [5]. Secure the
mounting plate to the interior “Z” rail with
7
10-32x
/16" thread-forming screws [23], as shown in
Figure 8 and tighten to 22 in-lb.
5. Mount the TVSS unit. Remove the two screws securing
the plastic cover to the TVSS unit and lift off the
cover. Save the screws for later reinstallation. Mount
7
the unit to the mounting plate with six 10-32x
/16"
thread-forming screws [23] and tighten to 22 in-lb.
6. Make cable connections to the TVSS. Trim the cable
assemblies to the minimum required and strip
1
/2
inch from the end of the cable. Connect the cable
assemblies to the lugs provided in the TVSS unit and
tighten the lug screws to 110 in-lb. Insure that the A
location is connected to the top lug, the B location (if
required) to the middle lug, and the C location to the
bottom lug, as shown in Figure 9.
a. Install ground (and neutral cable if required).
Measure the length required for the ground and
1
neutral cables and cut from the cable [1]. Strip
/2
inch from the end of the cable and connect to the
TVSS ground and neutral lugs and panel lugs, as
shown in Figure 9. Tighten the lug screws to 110
in-lb. Reinstall the plastic cover on the TVSS.
b. Install the cable connections from the circuit
breaker to the TVSS. Trim the cable [21] to the
length required and strip the ends as required.
Connect the cable to the appropriate connection
points on the circuit breaker and the TVSS, as
shown in Figure 10. Install the ground and neutral
cables as in step a. above.
Figure 7. Barrier installation.
Figure 8. Mounting plate installation.
Figure 9. Installing the cable connections to the TVSS.
3
Page 4
Figure 10. TVSS with a circuit breaker disconnect.
7. Install the TVSS monitor plate to the filler plate.
Mount the monitor plate, provided with the TVSS, to
the cover plate [6, 7, or 8], as shown in Figure 11.
Secure with two 10-32x
7
/16" thread-forming screws
[23] and tighten to 22 in-lb.
8. Install the filler supports. For 27W, 31W, and 35W
panels, mount four filler supports [9] to the Z rail of
the vertical bus interior, as shown in Figure 12. For
36W, 40W, 44W, and 45W panels, mount two filler
supports [4] to the Z rail, as shown in Figure 13.
7
Secure the supports with 10-32x
/16" thread-forming
screws [23] and tighten to 22 in-lb.
9. Install the filler plate assembly. Plug the cable harness
into the TVSS and monitor panel. Mount the filler
plate assembly to the filler supports, as shown in
Figure 14. Secure with four 10-32x
7
/16" thread-
forming screws [23] and tighten to 22 in-lb.
Figure 11. TVSS monitor plate mounted to the cover.
Figure 12. Filler supports for 27 and 31 wide panelboard or 35 wide
switchboard.
Figure 13. Filler supports for 36, 40, and 44 wide panelboard or 40
and 45 wide switchboard.
4
Page 5
Figure 14. Mounting the filler plate assembly on the supports.
5
Page 6
g
These instructions do not cover all details or variations in equipment nor do they provide for every possible
g
p
contin
information be desired or should
purposes, the matter should be referred to the GE Company.
ency that may be met in connection with installation, operation, or maintenance. Should further
articular problems arise that are not covered sufficiently for the purchaser’s
GE Industrial Systems
General Electric Company
41 Woodford Ave., Plainville, CT 06062