ERICO TDS50-240V - Manual (Page 2)

TRANSIENT DISCRIMINATING SUPPRESSOR
INSTALLATION INSTRUCTIONS
www.erico.com Page 2 of 2 Doc: HBCR1361.DOC, Rev: 2
Failure to follow this practice may result in the Suppressed
Voltage Ratings for the unit not being achieved.
The wiring diagram following shows one method of connecting
the TDS unit. It is generally wired in parallel with the circuit to
be protected, and may be fed from a breaker (see section 8).
L N E ( 4 - 6 m m ) B u n d l e / t w i s t t o g e t h e r S u p p l y K e e p a s s h o r t a s p r a c t i c a l S e e s e c t i o n 8 f o r f u s i n g d e t a i l s N L
L
N
E
Conductor size
10 to 14 AWG
(2.5-6mm )
2
Bundle/twist
together
Protected
Equipment
Supply
Keep as short
as practical
See section 8
for fusing details
N L
7. GROUND FAULT CIRCUIT INTERRUPTION (GFCI)
Where GFCI protectors (RCDs/ELCBs) are used, it is
preferable that the TDS 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.
8. FUSING AND ISOLATION
Overcurrent protection must be installed in the upstream circuit
of every TDS to provide protection to the unit itself, the load
and the wiring in case of fault situations. Where the “protected
circuit” upstream fuse/circuit breaker rating exceeds 100A,
then HRC overcurrent protection rated at 100A or less should
be fitted at the line end of the “T” tap.
NOTE: Operation of the tap overcurrent protection
under excessive surge conditions may occur removing
protection from the circuit. Status Alarms should be
monitored for this occurrence.
9. STATUS INDICATION
TDS modules have Status Indicator(s) on the front panel.
When power is applied and full surge capacity is available, the
Status Indicator(s) will be illuminated. Should power be applied
and an indicator fail to illuminate, the TDS should be replaced,
as optimum protection is no longer provided.
10. MAINTENANCE & TESTING
Before removing a TDS module from service, ensure that the
power has been removed from the module. Replacement of a
TDS module should only be undertaken by qualified
personnel.
NOTE: TDS 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 TDS 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-
275V) should be used.
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 TDS module input wiring.
The DAR module provides a fully isolated dry contact alarm
output. One DAR can be used per TDS, or up to 16 TDS50-
120Vs or TDS50-240Vs can be connected in series to one
DAR to provide a common dry contact alarm output. When
using the TDS50-120/240V up to 8 units can be series
connected.
It is recommended that the DAR unit be powered from the
output/load side of the TDS being monitored, however the
DAR can be powered from other circuits. This allows for
example, one DAR unit to be connected to separate TDS
modules 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 TDSs. Visual
inspection of the DAR and TDS Status Indicator is
required to clarify this situation.
12. USE OF OTHER INTERFACES
ERICO, Inc. DAR-275Vs are recommended for the interfacing
of equipment to the TDS opto-coupler alarm output circuit. The
direct connection of other equipment to the TDS opto-coupler
alarm output circuit may not provide sufficient isolation or
exceed the opto-coupler specifications. This may damage the
TDS and/or the connected equipment. Warranty may be
voided under such circumstances. However, the specifications
for TDS alarm output has been provided for those who desire
to use the TDS opto-coupler output directly.
The TDS 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. Refer to instructions supplied with the
DAR.
NOTE: In connecting to the TDS opto-coupler alarm
output, do not reverse the +/- connections or exceed
the maximum permissible ratings (30Vdc) as damage
may occur
L N E ( 4 - 6 m m ) B u n d l e / t w i s t t o g e t h e r S u p p l y K e e p a s s h o r t a s p r a c t i c a l S e e s e c t i o n 8 f o r f u s i n g d e t a i l s N L