Page 1
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
INSTALLATION INSTRUCTIONS
1. Verify system voltage by measuring L-N, L-G, L-L
2. Identify proper location for the SPD. Locate the unit
3. Connect proper ground. An insulated grounding
should be cut to minimum possible length; never coil or push aside excess length.
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.
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-
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.
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
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.
34600 Solon Road HBCR1581 REV4
Solon, Ohio 44139
(440) 248-0100
www.erico.com
Page 2
Installation Instructions
* Not e: SPDs connected to High Leg Delta systems
have one of the phase wires identified by an orange
marking. This lead must be connected to the high leg
(normally Phase B) of the power system.
The TDX units are supplied with 10AWG leads.
Phase conductors are 610mm (2ft) long. Wire length
should be minimized to improve performance. There
is no minimum wire length requirement.
6. Connect Remote Monitoring. Form C dry contacts
(N/O, N/C & Common) are located behind the lower
mounting plate (end opposite from AC connection
gland). To make connection to the terminals provided
for this purpose, temporarily remove the mounting
plate, drill/punch at exact center and install an
insulated (plastic) cable gland (1/2") that:
a. Preserves the SPD/panel NEMA enclosure rating.
b. Does not foul the internal PCB or components.
Wire to alarm terminals through gland and replace
mounting plate. Permissible wire size is #24-16 AWG
(0.2 - 1.5mm2)
Circuits internal to the SPD may be at line voltage, do
not attempt to connect alarm circuits unless power to
the SPD has been isolated.
Contacts are rated at 400Vac, 3A maximum.
Terminals marked "NO" (Normally Open) and "C"
(Common) are switched together while the SPD is
operating with full capacity. Terminals "NC" (Normally
Closed) and "C" are switched together if power is
removed or the SPD displays reduced surge capacity.
7. Nearby Attachment-Plug Receptacles
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 in the case of a high-rise steel-frame
structure.
8. Connector and Lugs
Pressure terminals 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 spl icing connector
where physical contact occurs between dissimilar
conductors unless the device is identified for the
purpose and conditions of use.
9. Activate unit. When the power is applied, the
diagnostic lights will indicate that the unit is
operational and protection is being provided. If the
status lights do not illuminate, please recheck any
supply fuse as well as the phase, neutral and ground
connections.
10. Flush Panel Mounting . For flush panel mounting,
please order the flush cover plate and follow the
instructions supplied.
11. Alarm Conditions. The status indicators will
extinguish and the audible alarm will sound if the
surge capacity is reduced. This may also occur if
power is lost to particular phases. Please check the
status display, power connection s and supply fuses if
this condition occurs. If power is being correctly
supplied to all phases and the alarm condition
remains, the unit requires prompt replacement.
Operating Voltage (MCOV)
12. Problem Diagnostics. If problems continue after
checking the electrical connections, contact your local
ERICO representative.
34600 Solon Road HBCR1581 REV4
Solon, Ohio 44139
(440) 248-0100
www.erico.com
Page 3
Installation Instructions
WARNING. Several “Delta” and “No-neutral” power systems exist and are often confused.
Failure to correctly identify and use the correct SPD may cause an electrical shock or burn hazard.
L3L1L2 (B)
L3
L1L2L3
L1L2L3
240V TDX100 120/240D
TDX150 120/240D
208V 480V 600V
208V 480V 600V
TDXxxx 120/208 can be used, cap neutral. TDXxxx 277/480 can be used, cap neutral. Cap neutral.
IMPORTANT
DESCRIPTION
Single Phase
(Split)
1Ø 3W+G
Three Phase Wye
3Ø Wye 4W+G
Three Phase Wye
3Ø Wye 3W+G
(No Neutral)
Three Phase
High Leg Delta
3Ø 4W+G
∆
CONFIGURATION
L1
N
L2
G
L1
N
L2
L3
G
G
L2 (High Leg)
L1
N
G
TYPICAL VOLTAGE SPD
120/240V
L-L
240V
120V
L-N
120V
L-G
120/208V 277/480V 347/600V
L-L
120V 277V 347V
L-N
120V 277V 347V
L-G
208V 480V 600V
L-L
120V 277V 347V
L-G
L-L
L1-N
L2-N
L3-N
240V
240V
120V
208V
120V
120/240V TDX100 120/240
TDX150 120/240
120/208V TDX100 120/208
TDX150 120/208
277/480V TDX100 277/480
TDX150 277/480
347/600 TDX100 347/600
TDX150 347/600
208V TDX100 240D
TDX150 240D
480V TDX100 480D
TDX150 480D
600V TDX100 347/600
TDX150 347/600
(1)
(1)
(2)
(2)
(3)
(3)
Three Phase
Grounded Corner
Delta
3Ø 3W+G
∆
("Grounded B Phase")
Three Phase
Ungrounded Delta
3Ø 3W+G
∆
(1)(2)(3)
L-L
L1-G
L2-G
L3-G
G
L-L
L-G
G
240V 480V
240V 480V
240V 480V
240V 480V
0V 0V
240V 480V
240V 480V
0- 240V 0-480V
240V TDX100 240D
TDX150 240D
480V TDX100 480D
TDX150 480D
Contact Factory
34600 Solon Road HBCR1581 REV4
Solon, Ohio 44139
(440) 248-0100
www.erico.com
Page 4
TDX Series 10 Year Limited Warranty.
This Product has a limited warranty to be free from defects in materials
and workmanship for a period of ten (10) years from the date of dispatch
from the Manufacturer. This warranty includes, but is not limited to,
damage due to over-voltages, damage due to an abnormally high number
of surges and damage due to direct or indirect lightning strikes.
THE PURCHASER ACKNOWLEDGES THAT LIGHTNING IS A
NATURAL EVENT WITH STATISTICAL VARIATION IN
BEHAVIOR AND ENERGY LEVELS WHICH MAY EXCEED
PRODUCT RATINGS, AND THAT 100% PROTECTION IS NOT OFFERED AND
CANNOT BE PROVIDED FOR. IN ADDITION, THE PURCHASER ACKNOWLEDGES
THESE RISKS AND HAS DETERMINED THAT THEY ARE ACCEPTABLE FOR THE
APPLICATION OF THE PRODUCT. THE PURCHASER IS SOLELY RESPOSIBLE FOR
ENSURING THAT THE PRODUCT IS INSTALLED IN STRICT ACCORDANCE WITH
THE MANUFACTURER’S INSTRUCTIONS, AMERICAN NATIONAL STANDARD
ANSI/IEEE C62.41.2 AND ALL RELEVANT NATIONAL ELECTRICITY AND SAFETY
STANDARDS.
The Manufacturer’s liability is limited to the repair or replacement of the product (at the
Manufacturer’s sole option) which, in the Manufacturer’s judgment, has not been abused,
misused or altered. The supply of replacement Products may be conditional upon the
Manufacturer performing a site power quality audit and implementation by the Purchaser of
any resultant recommended corrective measures.
EXCEPT AS STATED IN THE FIRST PARAGRAPH ABOVE, THE MANUFACTURER
MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AND
SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE.
The scope of this warranty does not provide for claims against the Manufacturer for
consequential damages or loss of operations or service or profits. This warranty does not
indemnify the Purchaser from any consequential claims by a third party for damages or loss of
operations or service or profits. The giving of, or failure to give, any ad vice or
recommendations by the Manufacturer shall not constitute liability.
Customers should contact their nearest Manufacturer’s agent to obtain a Return Material
Authorization (R.M.A.) which must be clearly marked on the outside of the shipping container
as well as on the unit being returned. It should then be forwarded, freight brokerage, and duty
prepaid, to: ERICO, Inc. 34600 Solon Road • Solon, Ohio • (440) 248-0100 along with a note
describing the problem. Proof of purchase should also accompany the request for warranty
repair or replacement. Return freight is customer collect.
34600 Solon Road
Solon, Ohio 44139
(440) 248-0100
www.erico.com
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