Maintenance - ABB Zenith ZTG 30 Operation, Maintenance And Installation Manual

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8. Maintenance

Warning
Any maintenance should be conducted by
trained and authorized personnel only.
Appropriate personal protective equipment
(PPE) shall be used when performing mainte-
nance on the ATS panel.
Hazardous voltage may be present. Discon-
nect all power sources before performing
work inside the ATS panel.
Failure to do so may result in serious injury
or death.
Maintenance Principle
The Zenith ZTG(D) series 30-1200 A, 200-
480 Vac automatic transfer switches,
powered by TruONE, are designed so that
the contacts last their designed lifetime
without any routine maintenance needs. If
there are abnormal conditions such as a
fault or overload without adequate
protection, or extreme environment
conditions, a failure of ATS components
may occur. Fortunately, all critical
modules, including controller, power
module, HMI, and solenoid mechanism, as
well as accessories are readily
replaceable. Refer to section 11 for
replacement parts.
On the other hand, when the contacts
have seen an event, or have met the end of
their lifetime, the whole switch should be
replaced – which can be done easily by
replacing the complete TruONE power
panel within the enclosure.
In the case you suspect a failure may be
due to manufacturer defect and covered
under warranty, see section 1.3.
Refer to section 7 technical data for ATS
contact endurance and note that the
number of operations can be viewed in
the information menu from the HMI.
Routine Inspection
ABB recommends a routine (such as
annual) inspection to, e.g. , check
electrical termination temperatures,
ensure unit is clean, check voltage levels,
test transfers, # of operations, etc. to
ensure everything is in proper working
order.
Recommended annual inspection
includes:
- Review event log
- Check number of operations and other
switch status figures
- Visual inspection both inside and
outside of enclosure for damage
or debris
- Temperature measurement of terminals
is within expected range
- Test transfer of load
- Observe voltage levels of both sources
within expected range
- Cable lug torque verification
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