Guardian 5240 - De-Energized; Utility Restored, Transfer Switch De-Energized

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.
Page 61
NEUTRAL
CONNECTION
INSIDE SWITCH
XB
NO
C1
COM
XA
VR1
NC NC
COM
C2
VR2
NO
TR
194
23
1
7
4
79
36
9
F2
CIRCUIT 10
BLACK (MAIN 1)
12VDC TRANSER
COIL
RED (MAIN 2)
NEUTRAL (WHITE)
NEUTRAL (WHITE)
23
OPEN
F1
N2
N1
194
23
BLACK
RED
N2
N1
194
240VAC TO
TO GENERATOR
OUTPUT
PANEL
MAIN DISTRIBUTION
LC-CIRCUIT BREAKER (LOADS)
F1,F2-5A, 600V FUSE
XA,XB-LIMIT SWITCHES
TS-TERMINAL STRIP
TR-TRANSFER RELAY
C2-GENERATOR COIL & RECTIFIER
LEGEND
C1-UTILITY COIL & RECTIFIER
T1
T2
T1 T2
E2
E2
E2
E2
E1
E1
N1A
N1A
N2A
N2A
B
B
B
B
B
E1
E1
E1
N1AN1A
N1A
194
23
E1
E2
205
205
126
126
E2
N1A
N2A
N2A
A
N2A
240VAC
OUTPUT
GENERATOR
TS TO
CONTROL PANEL
CIRCUIT BREAKER
A
B
AT S
ATS-AUTOMATIC TRANSFER SWITCH
LC
CIRCUIT 9
CIRCUIT 6
CIRCUIT 5
CIRCUIT 2
CIRCUIT 1
CIRCUIT 3
CIRCUIT 4
CIRCUIT 7
CIRCUIT 8
CIRCUIT 11
CIRCUIT 12
CIRCUIT 13
CIRCUIT 14
CIRCUIT 16
CIRCUIT 15
16 CIRCUIT LOAD CENTER 12 CIRCUIT LOAD CENTER 10 CIRCUIT LOAD CENTER
8 CIRCUIT LOAD CENTER
UTILITY
GENERATOR
GROUND
DC
Figure 8. Utility Restored, Transfer Relay De-energized.
“V-TYPE” PREPACKAGED
TRANSFER SWITCHES
SECTION 3.2
OPERATIONAL ANALYSIS
PART 3