Specifications

I.B. ATS-I005
Page 30
Effective 6/00
Step 5: Measure the voltage from J5-20 to J5-5. Is
the voltage measured 120 Vac (+/- 10 volts)?
Record the reading.
If YES: Proceed to Step 6.
If NO: Refer to the appropriate wiring dia-
gram or contact Cutler-Hammer.
Step 6: Measure the voltage from P3-4 to P3-5. Is
the voltage measured 120 Vac (+/- 10 volts)?
Record the reading.
If YES: Check motor and bridge rectifier.
If NO: Contact Cutler-Hammer.
6.4 PROBLEM SOLVING (SPB TYPE TRANSFER
SWITCHES)
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 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.
!
WARNING
!
WARNING
If a problem persists after having completed the problem
solving procedure, contact a Cutler-Hammer represen-
tative 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
6.4.1 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: Press the push-to-close button on the normal
switching device. 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.
6.4.2 TRANSFER SWITCH WILL NOT
AUTOMATICALLY TRANSFER TO NORMAL
Step 1: Is Option 29 installed? If so, there would be a