Kohler MPAC 1500 Manual page 89

SINGLE LINE DIAGRAM
U
LEGEND
ATS -- AUTOMATIC TRANSFER SWITCH
EBSM -- EXTERNAL BATTERY SUPPLY MODULE
G1 -- GENERATOR #1
G2 -- GENERATOR #2
K1 -- NORMAL RELAY
K2 -- EMERGENCY RELAY
LED1 -- LIGHT EMITTING DIODE (BATTERY 1 REVERSED)
LED2 -- LIGHT EMITTING DIODE (BATTERY 1 REVERSED)
LED3 -- LIGHT EMITTING DIODE (BATTERY SUPPLYING POWER)
MLB -- MAIN LOGIC BOARD
P(#) -- CONNECTOR
PIOM -- PROGRAMMABLE INPUT/OUTPUT MODULE
MLB -- MAIN LOGIC BOARD
TB(#) -- TERMINAL BLOCK
SW -- SWITCH
U -- UTILITY
OPERATION
WHEN UTILITY FAILS ATS2 STARTS G1. ATS1 TRANSFERS TO THE EMERGENCY POSITION. IF G1 FAILS ATS2
WILL START G2 AND ATS2 WILL TRANSFER TO EMERGENCY. IF G1 RETURNS THEN ATS2 WILL RE--TRANSFER
BACK TO NORMAL. ATS1 WILL RE--TRANSFER BACK TO NORMAL AFTER THE UTILITY RETURNS. WHEN THE
UTIITY IS AVAILABLE, THE BATTERY SUPPLY MODULE WILL PROVIDE POWER TO THE CONTROLLER ON ATS2.
THE 3 SOURCE SYSTEM DISABLE INPUT AND OUTPUT WILL PREVENT ATS2 FROM STARTING EITHER GENSET
WHILE THE UTILITY SOURCE IS AVAILABLE.
THE BATTERY SUPPLY MODULE USES UP TO TWO BATTERY INPUTS (9--36VDC) AND PROVIDES A 12V
OUTPUT THAT POWERS THE ATS CONTROLLER. THIS IS CONNECTED TO THE CONTROLLER BY SNAPPING IT
TO AN EXISTING I/O MODULE OR THROUGH A HARNESS TO P3 ON THE CONTROLLER (WHEN AN I/O
MODULE IS NOT USED). THE BATTERY SUPPLY MODULE WILL CONTINUALLY PROVIDE POWER TO THE
CONTROLLER UNLESS THE ON/OFF INPUT ON THE BATTERY SUPPLY MODULE IS ENABLED.
THE ON/OFF INPUT ON TB1 OF THE BATTERY SUPPLY MODULE CAN BE USED IN CONJUNCTION WITH THE
NORMALLY OPEN CONTACT OF A PROGRAMMABLE OUTPUT FROM AN INPUT/OUTPUT MODULE TO TURN THE
BATTERY SUPPLY MODULE OFF WHEN A SOURCE IS AVAILABLE.
Figure 5-27 Three-Source System Transfer Switch and Source Connections
TP-6714 4/10
ATS1
N E
ENGINE START
L
N/C
LOAD
G1
N
NOTE: THE CLOSED IN EMERGENCY AUXILLIARY
CONTACT THAT IS USED IN THE ENGINE START CIRCUIT
OF THE ATS MUST BE REMOVED FROM THE CIRCUIT
WHEN USED WITH THIS THREE SOURCE CONTROL SCHEME.
REFERENCE ATS WIRING DIAGRAM FOR CONNECTIONS.
Note: ATS2 requires an external battery module
to maintain power to the controller.
G2
ATS2
E
ENGINE START
L
TO G2
GM28627B
Section 5 Setup 89