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Page 61
SECTION 3.4
DIAGNOSTIC TESTS
“V-TYPE” PREPACKAGED
TRANSFER SWITCHES
GENERAL
Test numbers in this section correspond to the
numbered tests in Section 3.3, "Troubleshooting Flow
Charts". When troubleshooting, first identify the
problem. Then, perform the diagnostic tests in the
sequence given in the flow charts.
TEST 21- CHECK VOLTAGE AT TERMINAL
LUGS E1, E2
DISCUSSION:
In automatic mode, the standby closing coil (C2) must
be energized by standby generator output if transfer
to the "Standby" source is to occur. Transfer to
"Standby" cannot occur unless that power supply is
available to the transfer switch.
DANGER: BE CAREFUL! HIGH AND
DANGEROUS VOLTAGES ARE PRESENT AT
TERMINAL LUGS E1 AND E2 WHEN THE
GENERATOR IS RUNNING. AVOID CONTACT
WITH HIGH VOLTAGE TERMINALS OR
DANGEROUS AND POSSIBLY LETHAL
ELECTRICAL SHOCK MAY RESULT. DO NOT
PERFORM THIS VOLTAGE TEST WHILE
STANDING ON WET OR DAMP GROUND,
WHILE BAREFOOT, OR WHILE HANDS OR
FEET ARE WET.
PROCEDURE:
1. If the generator engine has started automatically (due to
a utility power source outage) and is running, check the
position of the generator main circuit breaker. The circuit
breaker must be set to its "On" or "Closed" position.
When you are sure the generator main circuit breaker is
set to "On" or 'Closed", check the voltage at transfer
mechanism terminal lugs E1 and E2 with an accurate
AC voltmeter or with an accurate volt-ohm-milliammeter
(VOM). The generator line-to line voltage should be
indicated.
2. If the generator has been shut down, proceed as follows:
a.On the generator control panel, set the Auto-
Off-Manual switch to OFF.
b.Turn OFF all power voltage supplies to the
transfer switch. Both the utility and standby
power supplies must be positively turned off
before proceeding.
c. Check the position of the transfer mechanism
main contacts. The moveable LOAD contacts
must be connected to the stationary UTILITY
source contacts. If necessary, manually actuate
the main contacts to the "Utility" power source
side.
d.Actuate the generator main line circuit breaker
to its "On" or "Closed" position. The utility power
supply to the transfer switch must be turned
OFF.
PART 3
Figure 1. The “V-Type” Transfer Mechanism
- DIAGNOSTIC 1
- SPECIFICATIONS 2
- REPAIR MANUAL 3
- GENERAL 7
- INFORMATION 7
- SECTION 1.1 8
- SECTION 1.2 10
- SECTION 1.3 12
- SECTION 1.4 13
- SECTION 1.5 19
- FLASHING GREEN LED = 20
- NO UTILITY SENSE 20
- 4 FLASHING RED LEDS= 20
- EXERCISER NOT SET 20
- SECTION 1.6 21
- SECTION 1.7 22
- GENERAL INFORMATION 24
- AC GENERATORS 25
- SECTION 2.1 26
- SECTION 2.2 29
- SECTION 2.3 31
- SECTION 2.4 35
- “V-TYPE” 45
- PREPACKAGED 45
- TRANSFER 45
- SWITCHES 45
- SECTION 3.1 46
- SECTION 3.2 50
- SECTION 3.3 59
- SECTION 3.4 61
- DC CONTROL 71
- SECTION 4.1 72
- SECTION 4.2 76
- SECTION 4.3 90
- INTRODUCTION 97
- MANUAL SWITCH 97
- TEST 42 - TRY A MANUAL START 97
- DIAGNOSTIC TESTS 98
- (V-TWIN ONLY) 100
- SECTION 4.4 101
- OPERATIONAL 121
- SECTION 5.1 122
- DISASSEMBLY 125
- SECTION 6.1 126
- ELECTRICAL 129
- Page 130 130
- DRAWING #0E9014 (1 OF 2) 130
- Page 131 131
- DRAWING #0E9014 (2 OF 2) 131
- SCHEMATIC, 7 KW HOME STANDBY 132
- Page 134 134
- DRAWING #0E9016 (1 OF 2) 134
- Page 135 135
- DRAWING #0E9016 (2 OF 2) 135
- Page 136 136
- DRAWING #0E9017 (1 OF 2) 136
- Page 137 137
- DRAWING #0E9017 (2 OF 2) 137
- Page 138 138
- DRAWING #0E7687A 138
- Page 139 139
- DRAWING #0E7815A 139
- Page 140 140
- DRAWING #07687 140
- Page 141 141
- DRAWING #0E7815 141
- Page 142 142
- ELECTRICAL FORMULAS 143
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