ERICO TDX50 Series - Manual

Installation Instructions
TDX50 Series
34600 Solon Road HBCR1591 REV 5
Solon, Ohio 44139
(440) 248-0100
www.erico.com
This CRITEC TDX50 Surge Protection Device (SPD) is a high-performance Transient Voltage Surge
Suppressor (TVSS), designed to provide protection for sensitive electronic loads connected to distribution
panelboards or switchboards or where the SPD is directly connected to the electronic device. Maximum
protection will only be achieved if the SPD is properly installed. Please read the installation instructions
carefully and follow the instructions.
DANGER: Electrical shock or burn hazard. The installation of this TVSS device should
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 line voltage does not exceed TVSS voltage
requirement.
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 line 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 side rating
label. The (MCOV) maximum continuous
operating voltage specifications must not be
exceeded.
2. Identify proper location for SPD. Locate as
close as physically possible to panel being
protected. Mount top and bottom SPD
flanges securely. Mount as close to the
electrical connection as possible avoiding
excess distance and avoiding the need for
sharp bends in the wires. (Note: Refer to
installation diagram on SPD.) Use
appropriate conduit fittings 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.