Operation
TPS3 surge protective devices require minimal attention after installation.
TPS3’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
either for horizontal or for vertical mounting orientation as required
for each application.
TPS3 Control & Diagnostic Display Panel
TPS3’s 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 Option
The surge counter option 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).
Figure 9: Display - Horizontal
(Shown with Surge Counter)
Figure 10: Display - Vertical
(Shown with Surge Counter)
Dry Contacts Feature
TPS3 01, 05, and 06 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 11: Dry Contact Connection Configuration
NO
DRY CONTACTS
NC NC C NO
C
Prior to installing SPD, install, rotate and tighten box lug terminals to the
top of the SPD phase connection tabs, pointing toward breaker location.
Mount the SPD using supplied hardware, per previous instructions.
Connect the neutral connection by wire or bracket as appropriate.
Install conductors: Identify each panelboard buss as Phase A, B and C.
When the SPD is installed, the SPD’s Phase Tabs will have near proximity
above energized panelboard busses. The SPD’s phase connections must
correspond to buss phases. Connect conductors from the SPD’s Phase
Tabs to corresponding circuit breaker connections. For example, when
energized, the SPD Phase Tab for Phase A must be located above the
panelboard buss for Phase A. The SPD Phase Tab for Phase B must be
located above the panelboard buss for Phase B. The SPD Phase Tab
for Phase C must be located above the panelboard buss for Phase C.
Conductors must be as short and straight as possible. Use gentle radius
on any bends. Do not kink wires. Prevent wires from encroaching
breaker locations.
Torque all connections to the values specified on the installation and
maintenance instruction label affixed to the rear of the dead front.
Replace dead front supports and trim.
Energize breaker and confirm proper SPD operation.
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