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Page 20
SECTION 6: TESTING AND PROBLEM
SOLVING
6.1 TESTING
After the transfer switch equipment is initially installed or
during planned outages, the installation should be test-
ed to ensure that all equipment operates properly. This
attention to detail will help to avoid unexpected malfunc-
tions. Mechanical and/or electrical tests should be per-
formed as described in this section.
The frequency of subsequent testing should be based
on recommendations of the generator set manufacturer.
Use the test buttons to check the electrical operation of
the switch.
!
HIGH VOLTAGES ASSOCIATED WITH OPERA-
TIONAL TRANSFER SWITCH EQUIPMENT PRESENT
A SHOCK HAZARD THAT CAN CAUSE SEVERE
PERSONAL INJURY OR DEATH. USE EXTREME
CAUTION TO AVOID TOUCHING ELECTRICAL CON-
NECTIONS WHENEVER INSPECTING OR TESTING
THE EQUIPMENT.
IN ADDITION, IMPROPER OPERATION OF THE GEN-
ERATOR SET PRESENTS A HAZARD THAT CAN
CAUSE SEVERE PERSONAL INJURY OR DEATH.
OBSERVE ALL SAFETY PRECAUTIONS IN YOUR
GENERATOR SET OPERATIONS AND INSTALLA-
TION MANUALS.
6.1.1 MECHANICAL AND/OR ELECTRICAL TESTING
NOTICE
Since Option 4 (Time Delay Engine Cool-Off) as
described in Section 3 is standard, an engine start
signal will be present for a period of time when the
switch is first energized. The period of time is equal
to the timer setting. To avoid starting the engine
during this time period, turn the generator controls
to the OFF position.
Energize the transfer switch equipment as described in
Paragraphs 6.1.2 through 6.1.6. Insure that all safety
precautions are taken and that all WARNINGS and
CAUTIONS are observed.
WARNING
6.1.2 NO VOLTAGE STEPS
With no voltage available on either power source, pro-
ceed as follows:
Step 1: Check to make sure that both the normal and
emergency power switching devices are in the
OPEN position. The switching devices can be
put into the OPEN position by use of the manu-
al operator and stopping in the NEUTRAL posi-
tion.
Step 2 The generator engine start controls should be
in the OFF position to prevent an undesired
start.
Step 3 All timing circuits are factory set per
I.B. ATS-AT201. They can be changed upon
energization by following the instructions in
I.B. ATS-AT201.
Step 4 Check all transfer switch loads to ensure that
they are ready to be energized.
6.1.3 CONNECTING POWER SOURCES
Step 1: Close the normal power source upstream pro-
tection device.
a) The normal power switching device
should close.
Step 2: Connect the engine start battery cable.
Step 3: With the emergency generator in the OFF posi-
tion close the emergency power source
upstream protective device, assuming such a
device used.
NOTICE
At this point and prior to making any attempt to
energize the transfer switch equipment, the engine-
driven generator should be operated. If necessary,
the voltage regulator on the generator should be
adjusted according to the manufacturer's recom-
mendations. The automatic transfer switch equip-
ment will respond only to the rated voltage and fre-
quency indicated. on the switch rating nameplate.
Step 4: Reclose any generator engine-start controls
opened as a result of actions taken in Step 4,
Paragraph 6.1.2
I.B. ATS-AG03
Effective 7/00
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