Toshiba 18 - 1250 A Instruction Manual page 92

TE Series
Appendix 5 (cont.) External OL Relay Applications
Digital Solid State Soft Starters 18 – 1250A
SPECIAL MOTOR APPLICATIONS
Multiple Motors
When more than one motor is connected downstream from the TE
Series starter, the internal electronic overload protection cannot provide
proper protection of the individual motors. Codes require the use of
separate OLRs for each motor, which would need to be external
devices.
In these instances the TE Series Over Load protection should be turned
off, deferring protection to the separate OLRs. Care should be taken to
ensure that the External OLR is properly wired into the starter control
circuit to facilitate shutdown of the motor. The TE Series provides a
PTC input that can be wired to the NC auxiliary contact of the external
OLR so that a trip will still shut down the TE Series and be annunciated
on the display. Multiple OLRs would then be wired in series for the
same effect. See section 4.7.2.a for details on using the PTC input.
Disconnect
or
Circuit
Breaker
R / S / T /
TE Starter
L1 L2 L3
Solid State
.
Over Load
.
Bypass
Contactor
"BP"
U / V / W /
T1 T2 T3
External
Over Load 1
MTR
1
85
120VAC CONTROL POWER
Start / Run
Command
.
1 2 3
TE-TB-1
(24VDC)
G
External
Over Load 2
MTR
2
A1 A2
VMX-TB-2
External
External
OL 1
OL 2
9 10
TE-TB-1
(PTC Input)
TE...-BP Series
Control Wiring