20
TPS4 Surge Protection Devices |
Installation Guide / User Manual
21
Installation Guide / User Manual
| TPS4 Surge Protection Devices
Protection Loss
When the SPD detects a Protection Loss this animation will be shown. It will
remain on screen until acknowledged by an operator. Any subsequent events
that occur while the disconnection event animation is on screen will be
registered and queued for acknowledgment. Along with displaying the
disconnection animation, the Audio alarm will sound, and the dry contacts will
change state. A corresponding LED will also change state during a Protection
Loss. A loss of protection means that either the SPD has detected the loss
of a system phase or that one of the protection modes has permanently
disconnected and requires attention. As long as a fault state exists the dry
contacts will remain disengaged and the corresponding LEDs will be in a non-
green state. If the Protection Loss event was caused by a phase loss, returning
the phase will return the system to a GOOD state.
However, if the Protection Loss event was caused by a Mode disconnection, the
SPD will stay in the faulted state indefinitely. Pressing the CENTER button will
acknowledge the event and clear the alarm state. The Main Screen will be
showing the details for the Protection Loss.
Neutral to Ground Fault Event
When the SPD detects a Neutral to Ground Fault Event (NGF) this animation will
be shown. It will remain on screen until acknowledged by an operator. An NGF
is detected when greater than 20 volts has been detected between Neutral and
Ground. Any subsequent events that occur while the NGF event animation is on
screen will be registered and queued for acknowledgment. Along with displaying
the NGF animation, the Audio alarm will sound. Pressing the CENTER button will
acknowledge the event and clear the alarm state. The Main Screen will be
showing the details for the NGF.
The SPD may be exposed to a NGF for several minutes. The NGF animation
will be displayed as soon as a NGF has been detected. If an operator is able to
acknowledge the event while a NGF condition still exists, the screen to the left
will be displayed.
Power Outage
Should the SPD be subjected to a full power outage this animation will be
shown once power is restored. It will remain on screen until acknowledged
by an operator. Any subsequent events that occur while the power outage
event animation is on screen will be registered and queued for acknowledgment.
Along with displaying the power outage animation, the Audio alarm will
sound, and the dry contacts will change state. Pressing the CENTER button
will acknowledge the event and clear the alarm state. The Main Screen will
be showing the details for the Power Outage.
This SPD’s timekeeping is equipped to survive several days of a power outage.
When power returns the SPD will record the date and time of the power loss and
when power was restored. Should the SPD be exposed to an extended power
outage the SPD’s timekeeping may have been affected. It is highly recommended
that the time and date be updated.
Due to the nature of installations, were power may be cycled several times. The
Power Outage alarm is suspended. It is automatically engaged after the SPD has
been continually powered for 1 hour.
Maintenance
SPDs require minimal maintenance. Periodic inspection of
diagnostic LED indicators ensures proper operation. Clean
SPD as appropriate.
Troubleshooting & Service
Please contact Siemens Technical Support at 800-333-7421
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. Remove entire TPS4 unit from the Panel.
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
800-333-7421 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 TPS4 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 TPS4 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 TPS4 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
800-333-7421
Prior to calling Siemens TPS4 Technical Support for
assistance or ordering parts, please have the following
information available:
TPS4 model number: __________________________________
Manufacture date: ____________________________________
Date of Purchase: _____________________________________
Your order number: ___________________________________
Return Shipment:
Contact Siemens Customer Support, 866-663-7324 to
setup an RMA.