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IB140058EN
Instructional Booklet
Page
18
Effective: March 2016
O&M Manual for 30-1000 Amperes
Manual Transfer Switch
Section 6: Testing and Problem Solving
6.1 Testing
After the ATS equipment is initially installed or during planned out-
ages, the installation should be tested to ensure that all equipment
operates properly. This attention to detail will help avoid unex-
pected malfunctions. Mechanical and/or electrical tests should be
performed.
The frequency of subsequent testing should be based on recom-
mendations of the generator set manufacturer.
For mechanical operations, refer to Section 5 in this instruction
book
6.2 Problem Solving
A basic problem solving effort is the first step to take prior to call-
ing for assistance. Frequently, the effort will successfully address
most problems encountered. In addition, several problem solving
procedures are presented here which are specific to the type of
switches or circuit breakers used in this equipment.
If a problem persists after having completed the problem solving
procedure, contact a Eaton representative for further assistance.
When calling for assistance, the following is the minimum informa-
tion required to properly address the need:
1. 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 company.
6. Basic description of the situation as it exists.
7. Any results of the problem solving steps taken and/or read-
ings taken.
6.2.1 Transfer Switch Appears In-inoperative
Step 1:
Verify that the correct system voltage appears at NOR-
MAL switch. Measure the voltage at the breaker lugs.
Step 2:
Manually ratchet the mechanism to the NORMAL posi-
tion. Verify whether or not the system voltage now
appears on the load terminals
Step 3:
Verify that the voltage selection plug is in the proper
position to match the system voltage.
Step 4:
Look for any obviously overheated components. Deter-
mine the cause and rectify, if possible. Replace defective
components after the cause is determined.
WARNING
HIGH VOLTAGES ASSOCIATED WITH OPERATIONAL TRANSFER
SWITCH EQUIPMENT PRESENT A SHOCK HAZARD THAT CAN
CAUSE SEVERE PERSONAL INJURY OR DEATH. USE EXTREME
CAUTION TO AVOID TOUCHING ELECTRICAL CONNECTIONS
WHENEVER INSPECTING OR TESTING THE EQUIPMENT.
IN ADDITION, IMPROPER OPERATION OF THE GENERATOR SET
PRESENTS A HAZARD THAT CAN CAUSE SEVERE PERSONAL
INJURY OR DEATH. OBSERVE ALL SAFETY PRECAUTIONS IN YOUR
GENERATOR SET OPERATIONS AND INSTALLATION MANUALS
WARNING
HAZARDOUS VOLTAGES IN AND AROUND ATS EQUIPMENT DUR-
ING THE PROBLEM SOLVING PROCESS CAN CAUSE SEVERE PER-
SONAL INJURY AND/OR DEATH. AVOID CONTACT WITH ANY
VOLTAGE SOURCE WHILE PROBLEM SOLVING.
WARNING
ONLY PROPERLY TRAINED PERSONNEL, FAMILIAR WITH THE ATS
EQUIPMENT AND ITS ASSOCIATED EQUIPMENT, SHOULD BE PER-
MITTED TO PERFORM THE PROBLEM SOLVING FUNCTION. IF AN
INDIVIDUAL IS NOT QUALIFIED TO PERFORM THE PROBLEM SOLV-
ING FUNCTION, THE INDIVIDUAL SHOULD NOT ATTEMPT ANY OF
THESE PROCEDURES.
