I.B. ATS-CP01
Page 19
Effective 5/98
·
The normal relay closes certain contacts while
opening others. This starts the return to the normal
power source and normal transfer switch operation.
·
During this sequence, the normal power source
switch is closed and the emergency power source
switch is opened. This completes the make before
break transfer.
·
Simultaneously, the normal relay initiates the shut
down of the engine driven generator.
·
Transfer of the load back to the normal power
source is now complete.
Test Mode
A test begins when either the “TEST” button is used or
when the plant exerciser (if available) initiates a test.
·
The engine start contact is closed signaling the gen-
erator to start.
·
When the emergency power source voltage reaches
its operating range and the intelligence determines
the sources are in phase, the transfer begins. This
operating sequence closes the emergency switching
device then opens the normal switching device.
!
WARNING
OVERLAPPING CONTACTS
Alternate and Normal Sources
must be Synchronized
7805C60H02
THIS PRODUCT CONTAINS A SPECIAL CON-
TACT ARRANGEMENT (OVERLAPPING CON-
TACTS). MISUSE CAN RESULT IN DEATH,
SEVERE PERSONAL INJURY OR PROPERTY
DAMAGE.
(THIS LABEL IS APPLIED TO THE DEAD FRONT
COVER.)
Do Not Use Without
Reading Manual
Operating Instructions
MANUAL CLOSE BUTTON
FOLLOW THE INSTRUCTIONS
OUTLINED IN THE NEXT
WARNING LABEL.
(THIS LABEL IS APPLIED TO
THE COVER OF THE MANUAL
CLOSE BUTTON ON EACH
SWITCHING DEVICE.)
!
WARNING
Manual Operation Instructions
1. Disconnect Logic Connectors
2. Open both switching devices
3. Verify “OPEN” flags
4. Verify source availability
5. Close switching device on available
source by inserting a small tool in
center of “Manual Close Button” label
on switching device.
7805C60H01
THESE INSTRUCTIONS ONLY PERTAIN TO
MANUALLY CLOSING A SINGLE SWITCHING
DEVICE. ATTEMPTING TO CLOSE BOTH
SWITCHING DEVICES CAN CAUSE SEVERE
INJURY OR DEATH.
(THIS LABEL IS APPLIED TO THE DEAD FRONT
COVER.)
Attempting to close both
switching devices simultaneously
can cause severe injury
or death.
Follow Manual Operation Instructions Below
Figure 5-2 Switching Device Closing Precautions
