System Functional Tests - Guardian 4721 Repair Manual

SECTION 5.1

SYSTEM FUNCTIONAL TESTS

INTRODUCTION
Following standby electric system installation and
periodically thereafter, the system should be tested.
Functional tests of the system include the following:
• Manual transfer switch operation.
• System voltage tests.
• Generator Tests Under Load.
• Testing automatic operation.
Before proceeding with functional tests, read instruc-
tions and information on tags or decals affixed to the
generator and transfer switch. Perform all tests in the
exact order given in this section.
MANUAL TRANSFER SWITCH OPERATION
"V-TYPE" TRANSFER SWITCHES:
1. On the generator panel, set the AUTO-OFF-MANUAL
switch to OFF.
2. Turn OFF the "Utility" power supply to the transfer switch
using whatever means provided (such as a "Utility" main
line circuit breaker).
3. Set the generator's main line circuit breaker to OFF
" ".
Open
LOAD CONNECTED TO
UTILITY POWER SOURCE
Page 96
or
MANUAL
TRANSFER
HANDLE
TRANSFER
SWITCH
OPERATING
LEVER
Figure 1. Manual Operation "V-Type" Switch
PART 5
DANGER: BE SURE TO TURN OFF ALL
!
POWER VOLTAGE SUPPLIES TO THE
TRANSFER SWITCH BEFORE ATTEMPTING
MANUAL OPERATION. FAILURE TO TURN
OFF POWER VOLTAGE SUPPLIES TO THE
TRANSFER SWITCH MAY RESULT IN DAN-
GEROUS AND POSSIBLY LETHAL ELECTRI-
CAL SHOCK.
4. Remove the manual transfer handle from the enclosure.
5. Place open end of the manual transfer handle over trans-
fer switch operating lever.
6. To connect "Load" terminal lugs to the "Standby" power
source, move, the handle upward.
7. To connect "Load" terminals to the Utility" power source,
move the handle downward.
8. Actuate the switch to UTILITY and to MANUAL several
times. Make sure no evidence of binding or interference
is felt.
9. When satisfied that manual transfer switch operation is
correct, actuate the main contacts to their "Utility" position
("Load" connected to the "Utility" power supply.
LOAD CONNECTED TO
STANDBY POWER SOURCE
OPERATIONAL TESTS
AND ADJUSTMENTS
TRANSFER
SWITCH
OPERATING
LEVER
MANUAL
TRANSFER
HANDLE