Specifications

I.B. ATS-I005
Page 28
Effective 6/00
!
WARNING
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 PERFORM ANY OF THESE PROCE-
DURES.
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. All of the steps present-
ed may not apply to all transfer switches, depending
upon the logic. Remember, only qualified individuals
familiar with the transfer switch equipment and the sys-
tem 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. Shop Order Number (SO#) or General Order
Number (GO#) of transfer switch, plus related Item
Number
2. Catalog and/or Style Number of transfer switch
3. Actual location of transfer switch (type of facility,
address, etc.)
4. Company name
5. Name and position of individual representing com-
pany
6. Basic description of situation as it exists
7. Any results of problem solving steps taken and/or
readings taken
6.3.1 TRANSFER SWITCH APPEARS INOPERATIVE
Step 1: Verify that all plugs and sockets are properly
interconnected.
Step 2: Verify that the correct system voltage
appears at NORMAL switch. Measure the voltage at
the breaker lugs.
Step 3: Verify that the voltage selection plug is in the
proper position to match the system voltage.
Step 4: Look for any obviously burned components.
Determine the cause and rectify, if possible.
Replace defective components after the
cause is determined.
Step 5: Manually ratchet the operating handle to the
NORMAL position. Verify whether or not the
system voltage now appears on the load ter-
minals.
If YES: Proceed to check logic for problems
in respective logic instruction book.
If NO: Check all power connections and
the switching mechanism.
6.3.2 IQ TRANSFER DEVICE APPEARS INOPERA-
TIVE
Step 1: Verify that all plugs and sockets on the IQ
Transfer device are properly interconnected.
Step 2: Is 120 Vac (+/- 10 volts ) control power on J7-
1 and J7-2 when the NORMAL source is
available?
If YES: Proceed to Step 3.
If NO: Measure the voltage on transformer
NT1X1 and X2. The voltage should
measure 120 Vac (+/- 10 volts).
Record the reading.
Step 3: Is 120 Vac (+/- 10 volts) control power on J7-
3 and J7-4 when the EMERGENCY source is
available?
If YES: Proceed to Step 4.
If NO: Measure the voltage on transformer
ET1X1 and X2. The voltage should
measure 120 Vac (+/- 10 volts).
Record the reading.
Step 4: Is the source that is being transferred to
available on the IQ Transfer membrane
panel?
If YES: Proceed to Step 5.