ABB Zenith
33
ZTSCT / ZBTSCT Operation & Maintenance Manual
Maintenance and Testing
A preventive maintenance program will insure high reliability
and long life for the transfer switch. The preventive mainte-
nance program for the transfer switch should include
the following items:
Inspection and Cleaning
The switch should be inspected for any accumulation of
dust, dirt, or moisture, and should be cleaned by vacuum-
ing or wiping with a dry cloth or soft brush. do not use a
blower since debris may become lodged in the electrical
and mechanical components and cause damage.
Remove the transfer switch barriers and check the condition
of the contacts. Any surface deposits must be removed
with a clean cloth (do not use emery cloth or a file). If
the contacts are pitted or worn excessively, they should be
replaced. A general inspection of mechanical integrity should
be made to include loose, broken or badly worn parts.
Servicing
All worn or inoperative parts must be replaced using ABB
Zenith recommended replacement parts. Please refer to
the Replacement Parts manual for specific part information
and ordering procedures. Please contact the ABB Zenith
Technical Services Department for the Replacement
Parts manual.
The operating mechanism of the transfer switch is lubri-
cated with Lubriplate 105. The lubricant applied at the
factory provides adequate lubrication for the lifetime of
the switch. Should debris contaminate the mechanism,
clean and apply additional Lubriplate.
ABB Zenith can provide complete preventative mainte-
nance services. Please contact the ABB Zenith Technical
Services Department for additional information.
CDT battery replacement - lithium batteries may last up
to 10 years, however it is recommended that battery
replacement be included in a 3-5 year service cycle. The
battery maintains the exerceser memory only and does
not otherwise affect the operation.
Testing
A manual operator handle is provided with the transfer
switch for maintenance purposes only. Manual operation
of the switch must be checked before it is operated electri-
cally.
Both power sources must be disconnected
before manual operation of the switch.
Insert
the handle and operate the transfer switch between the
Source 1 and Source 2 positions. The transfer switch
should operate smoothly without binding. Return the
switch to Source 1 position, remove the handle, and
return it to the holder provided.
After completing the inspection, cleaning and servicing
of the transfer switch, reinstall the switch cover, and close
and lock the cabinet door. Reclose the circuit breakers
feeding the utility and generator sources to the switch.
Initiate the electrical transfer test by activating the TS
test switch. P timer will time out and the microcontroller
will send an engine start signal. When the W time has
elapsed, the switch will complete its transfer by closing
into Source 2.
Deactivating the test switch will start retransfer to Source 1.
The switch will complete its retransfer to Source 1 after
the time delay of the T timer. The U engine overrun
timer allows the engine generator to run unloaded for
a preset cool down period.
NOTE
:
A periodic test of the transfer switch
under load conditions is recommended
to insure proper operation. (See National
Electric Code articles 700 and 701).
CAUTION
Due to hazardous voltage and current,
ABB
Zenith
recommends that an
ABB
Zenith Certified technician
or a qualified electrician must perform the
installation and maintenance of the switch.
WARNING
Both power sources must be disconnected
before manual operation of the switch.
WARNING
When performing a hi-pot or dielectric test
on the power section, DISCONNECT the
control panel plugs from the microprocessor
to avoid potential damage.
