Figure 8: Display – Horizontal
Dry Contacts Feature
TPS4 01 units are equipped with dry contacts. This feature
provides Normally Open (N.O.) and Normally Closed (N.C.)
circuits, which can be used for remote indication of a failed
transient voltage surge suppressor. There is only one dry
contact output consisting of two electrically isolated sets of
NC- C-NO contacts. This dry contact output changes from
“normal” to “alarm” if any problem occurs inside the SPD
(i.e.: loss of power to any phase, any thermal protector inside
the SPD opens, or any fuse inside the SPD opens). The dry
contact terminal block is located on the back of the module,
opposite side of bus tabs. This connector is designed for low
voltage or control signals only. Maximum voltage should not
exceed 240 volts and maximum current should not exceed
5 amperes. These contacts may be used to provide a signal
to an emergency management system or computer interface
board. The relay contact pin arrangement is outlined in the
table below.
The Normally Closed (N.C.) configuration is recommended
because it will detect a wiring defect, such as a cut wire(s),
where Normally Open (N.O.) will not.
Figure 9: Dry Contact Connection Configuration
Operation
TPS4 surge protective devices require minimal attention after
installation. TPS4’s contain diagnostic circuits which monitor
the suppressor’s status continuously and automatically. All
phase indicators and controls are located on the display
panel of the unit. Display panels are formatted for horizontal
mounting orientation.
TPS4 Control & Diagnostic Display Panel
TPS4s are equipped with a status indicating LED for each
phase on the panel. When all LED’s are green, the suppressor
is on-line and functioning properly. If a fault condition
occurs, the audible alarm will sound, the Red Service LED
will illuminate and the LED representing the affected phase
will extinguish, indicating that the unit needs service. The
audible alarm can be silenced by pressing ALARM SILENCE
on the touchpad. The audible alarm and Dry Contact
can be tested by depressing TEST. If a fault alarm occurs,
see Corrective Maintenance (Testing and Repair) for
further information.
Display Panel with Surge Counter
The surge counter provides a means to display the total
number of transient voltage surge events since the counter
was last reset. The counter includes Eprom memory, which
retains counter memory in the event of a power loss. The
RESET touchpad will reset the counter to zero. The COUNT
touchpad increments the counter by one (1) and tests the
circuitry for proper operation. If a fault alarm does occur,
see Corrective Maintenance (Testing and Repair) for
further information.
Phase A, B & C: Green LED indicators—one per phase.
Green is good. Extinguished green LED indicates loss
of protection. Every suppression element in this SPD
is monitored. N-G suppression element monitoring is
logic-connected to Phase A.
• Service LED (red): LED illuminates in the event of
problems. This indicator is logic-connected to the Phase
LEDs. Should a Phase LED go out, the Service LED will
illuminate and the Audible Alarm will sound.
• Test: Tests red Service LED and Audible Alarm, and
changes state of Dry Contacts.
• Alarm Silence: Turns Audible Alarm off. (Alarm is
deactivated when the Silence LED is illuminated.)
• Surge Counter Count: (if equipped) Increments optional
surge counter by one (+1).
• Surge Counter Reset: (if equipped) Resets optional surge
counter to zero (0).
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TPS4-01 Surge Protection Device |
Installation Guide / User Manual
