Operational Checks; Alternative Tests; Problem Solving - Eaton AGswitch Instructions Manual

I.B. ATS-AG03
Step 5: Where required, use an accurate voltmeter to
check phase-to-phase and phase-to-neutral
voltages present at the transfer switch normal,
emergency, and/or load terminals.

6.1.4 OPERATIONAL CHECKS

Step 1: Check to ensure that the normal switching
device is in the CLOSED position. This should
have been done in Step 1a Paragraph 6.1.3.
Step 2: Initiate an automatic transfer operation from the
normal to emergency power source
Step 3: Initiate an automatic transfer operation back to
the normal power source
a) After the Time Delay Emergency to Normal
timer (TDEN) and Time Delay Neutral Timer
(TDN) have timed out, the transfer switch
will transfer back to the normal power
source (emergency switching device opens
and normal switching device closes).
b) The Time Delay for Engine Cool-Off (TDEC)
option will allow the engine to run unloaded
for a preset time after transfer to normal
power source is completed.
6.1.5 ALTERNATE TESTS
1. Alternate operational tests may be possible depend-
ing upon the options provided with any given transfer
switch. Refer to the schematic diagram provided
with the transfer switch equipment along with the
specification nameplate to determine the exact
options provided.
2. If the transfer switch is operated manually with the
normal power source connected and available, it will
cycle back to normal power source, since it is the
preferred source. The transfer switch is designed for
safe manual transfer if an automatic transfer is initiat-
ed during the manual transfer.
Effective 7/00

6.2 PROBLEM SOLVING

!
HAZARDOUS VOLTAGES IN AND AROUND TRANS-
FER SWITCH EQUIPMENT DURING THE PROBLEM
SOLVING PROCESS CAN CAUSE PERSONAL
INJURY AND/OR DEATH. AVOID CONTACT WITH
ANY VOLTAGE SOURCE WHILE PROBLEM SOLV-
ING.
!
ONLY PROPERLY TRAINED PERSONNEL FAMILIAR
WITH THE TRANSFER SWITCH EQUIPMENT AND
ITS ASSOCIATED EQUIPMENT SHOULD BE PER-
MITTED TO PERFORM THE PROBLEM SOLVING
FUNCTION. IF AN INDIVIDUAL DOES NOT FEEL
QUALIFIED TO PERFORM THE PROBLEM SOLVING
FUNCTION,THE INDIVIDUAL SHOULD NOT
ATTEMPT TO ANY OF THESE PROCEDURES.
A basic problem-solving effort is the first step to take
prior to calling for assistance. Frequently, the effort will
successfully address most problems encountered. The
problem solving procedure is presented in the following
paragraphs as observed problem symptoms and one or
more possible solution steps. Remember, only qualified
individuals familiar with the transfer switch equipment
and the system in which it is applied should attempt
these problem solving procedures.
If a problem persists after having completed the prob-
lem-solving procedure, contact a Cutler-Hammer repre-
sentative for further assistance. When calling for assis-
tance, the following is the minimum information required
to properly address the need:
1. Style Number of transfer switch
2. Catalog Number of transfer switch
3. Actual location of transfer switch
(type of facility, address etc.)
4. Company name Name and position of individual
representing company
5. Basic description of situation as it exists
6. Any results of problem solving steps taken
and/or readings taken
WARNING
WARNING
Page 21