ERICO TDX150 Series - Manual

34600 Solon Road HBCR1581 REV4
Solon, Ohio 44139
(440) 248-0100
www.erico.com
Installation Instructions
TDX100 & TDX150 Series
The CRITEC TDX100 and TDX150 Series of Surge Protection Devices (SPD) are high-performance transient voltage surge
suppressors (TVSS), designed to provide protection to service panels, load centers or where the SPD is directly connected to
the electronic device requiring protection. Maximum protection will only be achieved if the SPD is properly installed. Please
read the following installation instructions carefully and follow the instructions.
DANGER: Electrical shock or burn hazard. The installation of this TVSS device should only be made by
qualified personnel. Failure to lockout electrical power during installation or maintenance can result in
fatal electrocution or severe burns.
CAUTION: Check to make sure system voltages do not exceed the TVSS voltage requirement and the
correct TVSS voltage/model has been selected.
CAUTION: This unit must be installed in accordance with the National Electrical Code (ANSI/NFPA-70)
and applicable local codes, and must be installed on the load side of the main over-current protection.
CAUTION: Do not install on ungrounded electrical systems.
NOTICE: Do not cut wires until the SPD is mounted and minimum wire lengths have been verified. All connection leads
should be cut to minimum possible length; never coil or push aside excess length.
INSTALLATION INSTRUCTIONS
1. Verify system voltage by measuring L -N, L-G, L-L
and N-G of the system. Confirm that the SPD is
correctly rated for the system to which it is to be
connected by comparing the measured voltages to
the SPD voltage ratings shown on the product label.
The (MCOV) maximum continuous operating voltage
specifications must not be exceeded.
2. Identify proper location for the SPD. Locate the unit
as close as physically possible to the panel being
protected and as close to the electrical connection as
possible so as to avoid excess lead lengths and the
need for sharp bends in the wires. (Note: Refer to
installation diagram on SPD.). Mount top and bottom
SPD flanges securely. Use appropriate cable glands
to preserve the SPD/panel NEMA enclosure rating.
3. Connect proper ground. An insulated grounding
conductor that is identical in size and insulating
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. The TDX is supplied with 914mm (3ft) long of
#10AWG, in accordance with Table 250-122 of the
National Electrical Code, for this purpose. The
housing of the TDX unit is bonded to the grounding
conductor for equipment safety ground purposes as
per National Electrical Code. The grounding
conductor 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.
Attach the grounding conductor to the panel’s ground
bus for proper operation. Wire length should be
minimized to improve performance. There is no
minimum wire length requirement.
Note: For isolated ground systems, bond the
grounding conductor from the TDX unit to the non-
isolated equipment ground, not the isolated
equipment ground.
4. Connect neutral conductor. The TDX units are
supplied with 10AWG leads. The white Neutral
conductor is 914mm (3ft) long. Wire length should be
minimized to improve performance. There is no
minimum wire length requirement. Measure and trim
the neutral conductor to be as straight and short as
possible. Connect the neutral conductor of the SPD to
the neutral lug on the panel.
5. Connect phase conductors. The phase wires may
be connected without regard to phase A, B*, C
orientation. With the POWER OFF, connect each
black phase lead via:
a. 30 Amp circuit breakers. Use a multi -pole circuit
breaker, do not connect to individual single-pole
breakers for each line.
b. or 30 Amp fused disconnected switch.
c. or if installed in compliance with Article 240-21,
the NEC “tap rule”, over-current protection may
be omitted.