ERICO TDF-20A-240V - Manual (Page 2)

TRANSIENT DISCRIMINATING FILTER
www.erico.com Page 2 of 2 Doc: HBCR1351.DOC, Rev: 4
5. MOUNTING
TDFs are designed to clip to 35mm DIN rails (standard
EN50022). Unless otherwise mechanically restrained, use
horizontal DIN rails with the TDF module spring clips to the
bottom and the label text the correct way up.
NOTE: TDFs must be installed in an enclosure or panel that:
• prevents the TDF unit temperature from exceeding
122°F (50°C)
• provides adequate electrical and safety protection
• prevents the ingress of moisture and water
• allows TDF status indicators to be inspected
6. GROUND FAULT CIRCUIT INTERRUPTION (GFCI)
Where GFCI protectors (RCDs/ELCBs) are used, it is
preferable that the TDF modules be installed prior to these
devices (i.e. upstream). If this is not done, nuisance tripping of
the GFCIs may occur during transient activity.
7. CONDUCTOR TERMINATION
Each TDF terminal is designed to accept wire sizes from 10 to
18 AWG (1.5mm² to 6mm²) solid or stranded conductor. The
wire insulation should be stripped back 5/16" (8mm).
NOTE: Do not use greater than 9inlbs (1Nm) of torque when
tightening the terminals. For UL compliance, where two
wires may need to be terminated into one terminal, the
permissible wire size is 18AWG each.
8. FUSING AND ISOLATION
Overcurrent protection must be installed in the upstream circuit
of every TDF to provide protection to the unit itself, the load
and the wiring in case of fault situations. The current rating of
the breaker or fuse used should be determined according to
below. However, the current rating should be less than the
rating of the wiring. For example, if a 20A TDF were installed in
a circuit with wiring that can carry 15A, then a 15A overcurrent
device must be installed upstream to protect both the TDF and
wiring from overload.
MAX FUSE SIZES: TDF RATING FUSE RATING
3A 4A
10A 10A
20A 20A
9. STATUS INDICATION
TDF modules have a single Status Indicator on the front panel.
When power is applied and full surge capacity is available, the
Status Indicator will be illuminated. Should power be applied
and the indicator fail to illuminate, the TDF should be replaced,
as optimum protection is no longer provided.
10. MAINTENANCE & TESTING
Before removing a TDF module from service, ensure that the
power has been removed from the module. Replacement of a
TDF module should only be undertaken by qualified
personnel.
NOTE: TDF units should be inspected periodically, and also
following any periods of lightning or transient voltage
activity. Check the Status Indicator and replace the module if
it is not illuminated as detailed in Section 9 STATUS
INDICATION.
11. DINLINE ALARM RELAY (DAR)
The TDF status monitoring circuit which provides the visual
Status Indicator, also provides a low voltage opto-coupler
alarm output circuit. Should voltage free alarm contacts be
required, the ERICO Inc, DINLINE ALARM RELAY (DAR)
should be used.
The DAR module provides a fully isolated dry contact alarm
output. One DAR can be used per TDF, or up to 16 TDFs can
be connected in series to one DAR to provide a common dry
contact alarm output.
Ensure that the voltage rating of the alarm wiring is rated in
accordance with the other voltages present in the equipment.
This would normally be the same voltage rating as that used
for the TDF module input wiring.
It is recommended that the DAR unit be powered from the
output/load side of the TDF being monitored, however the
DAR can be powered from other circuits. This allows for
example, one DAR unit to be connected to separate TDFs
which are protecting a three phase circuit.
NOTE: Depending upon the usage of the DAR output
contacts, failure of power to the DAR may be interpreted as a
failure of one or more TDFs. Visual inspection of the DAR
and TDF Status Indicator is required to clarify this situation.
12. USE OF OTHER INTERFACES
ERICO, Inc. DAR units are recommended for the interfacing
of equipment to the TDF opto-coupler alarm output circuit. The
direct connection of other equipment to the TDF opto-coupler
alarm output circuit may not provide sufficient isolation or
exceed the opto-coupler specifications. This may damage the
TDF and/or the connected equipment. Warranty may be
voided under such circumstances. However, the specifications
for TDF alarm output has been provided for those who desire
to use the TDF opto-coupler output directly.
The TDF alarm opto-coupler output is available on terminals 3
and 5. Terminal 3 is the positive and 5 is the negative side.
This output is an open collector transistor output of the opto-
coupler. When the opto-coupler is driven on, it should be
arranged to have 2mA flowing through it. For use with 24Vdc
circuits, a 12k
Ω
current limiting burden resistor is required. For
use with 12Vdc circuits, a 5.6k
Ω
current limit resistor is
required. For use with 5Vdc circuits, a 2.2k
Ω
current limit
resistor is required.
NOTE : In connecting to the TDF opto-coupler alarm output,
do not reverse the +/- connections or exceed the maximum
permissible ratings (30Vdc) as damage may occur.