Guardian 4389 Repair Manual page 59

"V-TYPE" PREPACKAGED
TRANSFER SWITCHES
UTILITY RESTORED, TRANSFER SWITCH DE-ENERGIZED
After the preset time interval expires the circuit board will open the Wire 23 circuit to ground. The transfer relay
de-energizes, it's normally closed contacts close, and utility source voltage is delivered to the utility closing coil
(C1), via Wires N1A and N2A, closed Transfer Relay Contacts 1 and 7, and Limit Switch XA1.
E1
N1A
E1
N1A
126
N1A
B
126
NO O NC
XA
COM
B
VR1
A
N2A
B
LEGEND
ATS-AUTOMATIC TRANSFER SWITCH
C1-UTILITY COIL & RECTIFIER
C2-GENERATOR COIL & RECTIFIER
F1,F2-5A, 600V FUSE
LC-CIRCUIT BREAKER (LOADS)
TR-TRANSFER RELAY
TS-TERMINAL STRIP
XA,XB-LIMIT SWITCHES
PART 3
194
194
A
23
9 9
TR
6
B
23
205
N2A
N1A
E1
N2A
205
B
N1A
N2A
E1
NC C NO
E2
COM
VR2
C1 C2
T1 T2
T1
B E2
T2
E2
UTILITY
DC
GROUND
GENERATOR
Figure 8. Utility Restored, Transfer Relay De-energized.
194
23
OPEN
F2
N2
F1
N1A N1
E1
E2
E1
E2
NEUTRAL
CONNECTION
INSIDE SWITCH
E2
BLU
VIO
YLW
BRN
BRN/WHT
YLW/WHT
GRY
PNK
LC
SECTION 3.2
OPERATIONAL ANALYSIS
194
12Vdc TRANSER
COIL
23
TS TO
GENERATOR
CONTROL PANEL
N2
240VAC
OUTPUT
N1
BLACK
TO GENERATOR
RED
OUTPUT
CIRCUIT BREAKER
NEUTRAL (WHITE)
NEUTRAL (WHITE)
240VAC TO
RED (MAIN 2) MAIN DISTRIBUTION
PANEL
BLACK (MAIN 1)
15A/120V CIRCUIT 6
15A/120V CIRCUIT 5
20A/120V CIRCUIT 2
30A/240V CIRCUIT 1
CUSTOMER
CIRCUIT
CONNECTION
30A/240V CIRCUIT 3
15A/120V CIRCUIT 4
15A/120V CIRCUIT 7
15A/120V CIRCUIT 8
Page 57