IMO Precision Controls Jaguar VXS - 9.5 Protection Circuits

57
9.5 Protection Circuits
Typical Single-phase Protection
Typical Three-phase Protection
NOTES
1 Screening and filtering for EMC is omitted
for clarity.
2 Observe correct polarity and connections.
KEY
DBR Braking resistor F Control circuit fuses
O/L Series-connected thermal overload sensor
RTS Resistor temperature sensor
TT Thermal trip switch
CAUTION When using an external braking resistor, it is essential that a series-connected
thermal overload trip circuit is installed and that it opens the main power supply switch
if a braking overload occurs.
Single-phase Supply System
INPUT
CONTACTOR
VXSxx-1
INVERTER
NL
TT
O/L
DBR
RTS
F
C
M
F
U
V
W
DB
(+)
L
N
P24
THR
L1 L3L2
TT
O/L
DBR
RTS
F
C
M
F
Three-phase Supply System
INPUT
CONTACTOR
VXSxx-3
INVERTER
U
V
W
DB
(+)
L1
THR
P24
L2
L3