Table of Contents
Advertisement
SPDs on Ungrounded Systems
Caution – Ungrounded systems are inherently unstable and can
produce excessively high line-to-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.
Optional Flush Mount Installation Instructions
Caution: The chassis of the TPS3 11 unit can fall into the wall cavity
if the four screws attaching the faceplate to the chassis are removed.
Use caution not to drop the TPS3 11 unit into the wall during instal-
lation or service.
The TPS3 11 unit is approximately 4.0" deep. The unit will not mount
flush unless there is at least 3.75" of clearance. The unit is designed
to mount flush on a typical "2 x 4" stud wall with drywall.
Depending on the depth of the wall cavity, there are two installation
procedures. The preferred installation utilizes Back Flange Mounting.
The back flange supports the weight of the TPS3 unit and service
procedures are greatly simplified. If this can not be accomplished, an
alternate Front Flange Mount is possible. Please note that the front
flange installation may create servicing difficulties in the future.
Preferred Installation - Back Flange Mounting: Mount as close as
possible to the protected panel. Create a wall opening approximately
6 3/4" tall by 6 1/16" wide. See drawing. (Rotate dimensions 90
appropriate depending on orientation.) Configure an appropriate
backing plate inside the wall cavity 3 7/8" from the wall face such that
the unit will be supported from its back. Note the mounting holes on
the back flange attachments. Be careful not to drop the unit into the
wall. Configure electrical conductor and conduit connection consistent
with the installation instructions on page 5. Preplan connections such
that they are completed prior to fastening the unit to the backing
plate. Install faceplate/cover prior to energizing and testing the unit.
Figure 3: Optional Flush Mount Installation
Flush Mount "F Option" (Preferred Installation)
Supplemental Installation Instructions
for Deep Wall Mounting
(Walls over 4" thick) Using the Enclosed Mounting Feet
Step 1
Prepare Wall and SPD
6
o
Step 2
Insert into Wall
Mount the SPD
Alternate Installation - Front Flange Mounting: This method is not
preferred for installation as servicing is substantially more difficult.
Extra care should be taken to NOT DROP the TPS3 unit into the wall.
Mount as close as possible to the protected panel. Create a wall open-
ing approximately 6 3/4" tall by 6 1/16" wide. See drawing. (Rotate
dimensions 90
as appropriate depending on orientation.) Preplan
o
and pre-connect electrical conductor and conduit connections such
that they are completed prior to fastening the TPS3 unit to the wall.
Note that removing the four screws attaching the front faceplate to
the unit chassis will cause the unit to fall inside the wall.
UL 1283 required language concerning the installation of EMI Filters
a) An insulated grounding conductor that is identical in size and
insulation material and thickness to the grounded and ungrounded
circuit supply conductors, except that it is green with or without one
or more yellow stripes, is to be installed as part of the circuit that
supplies the filter. Reference should be made to Table 250-122 of
the National Electrical Code regarding the appropriate size of the
grounding conductor.
b) The grounding conductor mentioned in item a is to be grounded
to earth at the service equipment or other acceptable building
earth ground such as the building frame in the case of a high-rise
steel-frame structure.
c) Any attachment-plug receptacles in the vicinity of the filter are to
be of a grounding type, and the grounding conductors serving these
receptacles are to be connected to earth ground at the service equipment
or other acceptable building earth ground such as the building frame
as
in the case of a high-rise steel-frame structure.
d) Pressure terminal or pressure splicing connectors and soldering lugs
used in the installation of the filter shall be identified as being suitable
for the material of the conductors. Conductors of dissimilar metals shall
not be intermixed in a terminal or splicing connector where physical
contact occurs between dissimilar conductors unless the device is
identified for the purpose and conditions of use.
Step 3
Mount the Lid
Supplemental Instructions for
Deep Wall Mounting (Walls over 4" thick)
Using the Enclosed Mounting Feet
Wall Cutout
Front View
6 1/16"
Step 4
Wide
6 3/4"
Tall
Hide quick links:
Advertisement
Table of Contents
