For more information visit: www.cutler-hammer.eaton.com
IB01602007E
Instruction Bulletin
Page
24
Effective: June 2003
O&M Manual for
Non-Automatic Transfer
Switches (30 – 1200 Amperes)
Section 6: Testing and Problem Solving
6.1 Testing
After transfer switch equipment is initially installed or during
planned outages, the installation should be tested to ensure
that all equipment operates properly. This attention to detail
will help to avoid unexpected malfunctions. Mechanical and/
or electrical tests should be performed.
The frequency of subsequent testing should be based on
recommendations 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
calling 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 Cutler-Hammer representative
for further assistance. When calling for assistance, the
following is the minimum information 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 situation as it exists.
7. Any results of problem solving steps taken and/or
readings taken.
6.2.1 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 overheated components.
Determine the cause and rectify, if possible.
Replace defective components after the cause
is determined.
Step 5: Manually ratchet the mechanism to the NORMAL
position. Verify whether or not the system voltage
now appears on the load terminals.
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 TOUCH-
ING 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 TRANSFER
SWITCH EQUIPMENT DURING THE PROBLEM SOLVING
PROCESS CAN CAUSE PERSONAL INJURY AND/OR
DEATH. AVOID CONTACT WITH ANY VOLTAGE SOURCE
WHILE PROBLEM SOLVING.
WARNING
ONLY PROPERLY TRAINED PERSONNEL FAMILIAR WITH
THE TRANSFER SWITCH EQUIPMENT AND ITS ASSOCI-
ATED EQUIPMENT SHOULD BE PERMITTED 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 PROCEDURES.
