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Maintenance
SPDs require minimal maintenance. Periodic inspection of diagnostic
LED indicators ensures proper operation. Clean SPD as appropriate.
Troubleshooting & Service
Please contact TPS Technical Support at 1.888.333.3545 for service
related issues.
Quality SPDs are designed and tested to withstand severe duty. However,
there are various electrical anomalies against which SPDs cannot protect.
These are generally Sustained Overvoltages also known as Temporary
Overvoltages (TOVs). In this context, Sustained Overvoltages may be
only a few cycles. Failed SPDs tend to be symptoms, not root causes.
There may be larger issues at play. Regardless of cause, SPDs attempt
to protect their load until failure.
Bonding or reference to ground problems are the root cause of many
SPD problems. If the SPD shows problems on startup, there is reasonable
chance of bonding/grounding/misapplication issue. Such problems
permanently damage the SPD. If not corrected, SPD problems will
reoccur.
Tip: Visually confirm N-G bonding. Be aware that a voltmeter
measuring N-G can be misleading. For example, N-G voltage
could read 0V because neutral and ground are at the same
potential purely by happenstance, not because they are
bonded. Visually confirm bonding.
Tip: Experience indicates that regulation-challenged
generators can cause Sustained Overvoltages, as well as
ungrounded generators, and/or usual load transfer systems.
Abnormal N-G Voltage Indicators
This SPD include N-G voltage indicators. If the SPD detects excessive
N-G voltage, the Red Service LED will blink and the Audible Alarm will
cycle. This condition requires immediate attention as the SPD will fail.
Incorrectly bonded distribution systems damage SPDs. If the XO or N-G
bonding jumper is not installed, the electrical system has no reference to
ground. It becomes an ungrounded system. Please see previous section
regarding SPDs on ungrounded systems. Such systems are known to
eventually produce abnormally high L-G voltages. SPDs will attempt
to chase this system-level overvoltage abnormality until the SPD fails.
This effect is accelerated on Wye systems where SPDs are designed
for grounded systems. (SPDs for ungrounded systems generally have
higher MCOV to allow for L-G voltage fluctuations.) Failures of this
nature are not defects in the SPDs workmanship or material. This is
an installation error and is not covered by warranty.
A differential voltage circuit monitors neutral to ground voltage. When
N-G voltage becomes excessive, an amplifier energizes a resistor.
Eventually, that resistor will overheat and cause thermally sensitive
shrink wrap to shrink around the resistor. This does not occur on transient
or instantaneous N-G overvoltages. When the SPD is deenergized, the
shrink wrap covered resistor can be accessed by qualified personnel
under the display plate cover.
Module Replacement & Service
The module is field replaceable. Service should only be performed
by qualified persons. Deenergize SPD, confirm with appropriate
measurement equipment and discharge internal capacitance to ground.
Mark locations and carefully disconnect diagnostic cables, contacts,
connecting conductors, etc. Unbolt module from backplane. Reinstall
in reverse.
There are no user serviceable parts inside the module. Disassembly
is not permitted.
Modules may be returned to the factory for factory service, qualification
and return. Please contact factory at 1.888.333.3545 for assistance.
Display Replacement
The display is field replaceable. Service should only be performed
by qualified persons. Deenergize SPD, confirm with appropriate
measurement equipment and discharge internal capacitance to ground.
Mark locations and carefully disconnect diagnostic cables, contacts,
connecting conductors, etc. Unbolt display and replace. Reinstall in
reverse.
Note that a sealing gasket between the display and the enclosure is
a key component ensuring weather resistance. Replace the gasket
whenever the display is removed.
Preventive Maintenance (Inspection & Testing)
Inspection of the TPS3 SPD unit should be performed periodically,
to maintain reliable system performance and continued transient
voltage surge protection. The large variations in operating conditions
encountered by units in the field make it difficult to set a fixed
maintenance interval, but inspections utilizing the built-in diagnostics
should be performed at least on a weekly or monthly basis.
Corrective Maintenance (Repair)
The Siemens TPS3 unit is designed for years of reliable, trouble-free
operation. Unfortunately, in an extreme case, you may experience an
alarm condition. In this event, no attempt should be made to repair the
TPS3 itself. There are no serviceable parts within the unit. Any SPD that
requires service should be appropriately removed from the electrical
distribution equipment, and replaced by a new SPD of the same model.
Technical Support
1.888.333.3545
Prior to calling Siemens TPS3 Technical Support for assistance or ordering
parts, please have the following information available:
TPS3 model number: ________________________________
Manufacture date: _________________________________
Date of Purchase: ___________________________________
Your order number: _______________________________
Return Shipment Address:
Siemens - Attn: RA #___________
14550 58th Street North
Clearwater, FL 33760
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