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Zenith ZBTS T-series 100-1200A, INSTALLATION AND OPERATING INSTRUCTION
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9. Maintenance
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9.1 Maintenance Principle
Warning
Due to hazardous voltage and current, ABB
recommends that ABB certified technician or
qualified electrician must perform the instal-
lation and maintenance. Appropriate personal
protective equipment (PPE) shall be used
when performing maintenance on the By-
pass-isolation automatic transfer switches
panel. Failure to comply with these instruc-
tions may result in death or serious injury.
Bypass / Isolation automatic transfer
switches 100-1200A, powered by TruONE,
are designed so that the contacts last
their designed lifetime without any rou-
tine maintenance needs. If there are ab-
normal conditions such as a fault or over-
load without adequate protection, or
extreme environment conditions, a failure
of ATS components may occur. Fortu-
nately, all critical modules, including con-
troller, power module, HMI, and solenoid
mechanism, as well as accessories are
readily replaceable.
On the other hand, when the contacts
have seen a damaging fault event, or have
met the end of their endurance lifetime,
the whole switch should be replaced –
which can be done easily by replacing the
complete draw-out ATS or draw-out By-
pass switch. Note that the number of op-
erations can be viewed by using Ekip Con-
nect software.
9.1.1 Routine Inspection
ABB recommends a routine (such as an-
nual) inspection to, e.g. check electrical
termination temperatures, ensure unit is
clean, check voltage levels, test transfers,
number of operations, etc. to ensure ev-
erything is in proper working order.
9.1.1.1 Recommended Annual Inspection
Includes:
• Review event log
• Check number of operations and other
switch status figures
• Visual inspection both inside and out-
side of enclosure for damage or debris
• Test transfer of load
• Observe voltage levels of both sources
within expected range
• Cable lug torque verification
Warning
Hazardous voltage may be present. Discon-
nect all power sources before performing
work inside the Bypass-isolation automatic
transfer switches panel. Failure to do so may
result in serious injury or death.
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