Maintenance; Maintenance Principle; Routine Inspection - ABB Zenith ZBTS T Series Installation And Operating Instruction

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Zenith ZBTS T-series 100 – 600 A, I N S TA L L AT I O N A N D O P E R AT I N G I N S T R U C T I O N
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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.
Avertissement
En raison de la tension et du courant dange-
reux, ABB recommande qu'un technicien certi-
fié ABB ou un électricien qualifié effectue
l'installation et la maintenance. Un équipe-
ment de protection individuelle (EPI) appro-
prié doit être utilisé lors de l'entretien du pan-
neau des Commutateurs de Transfert
Automatiques à Isolation de Dérivation. Le
non-respect de ces instructions peut entraî-
ner la mort ou des blessures graves.
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.
Avertissement
Une tension dangereuse peut être présente.
Débranchez toutes les sources d'alimentation
avant d'effectuer des travaux à l'intérieur du
panneau des commutateurs de transfert au-
tomatique d'isolation de dérivation. Le
non-respect de cette consigne peut entraîner
des blessures graves ou la mort.
Bypass/Isolation Automatic Transfer
Switches 100–600 A, 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