Toshiba 18 - 1250 A Instruction Manual page 93

TE Series
Appendix 5 (cont.) External OL Relay Applications
Digital Solid State Soft Starters 18 – 1250A
SPECIAL MOTOR APPLICATIONS
2S2W Motors
2 speed / 2 winding motor applications require a separate OLR sized for
each set of windings. These would need to be external OLRs.
Disconnect
or
Circuit
Breaker
R / S / T /
TE Starter
L1 L2 L3
Solid State
.
Over Load
.
Bypass
Contactor
"BP"
U / V / W /
G
T1 T2 T3
MS
Slow
Over Load
2S2W
MTR
In this example:
The TE Series is used ahead of an existing 2S2W starter, which
already has separate OLRs for each speed. Dry Aux. contacts of the
2S2W starter are used to provide a Run command to the TE Series so
that all existing controls can be used. In addition, another dry Aux. of the
Fast contactor is used to select Ramp 2. When started in Slow, Ramp 1
(default) is used. If started in Fast, different ramp settings are necessary
so Ramp 2 is used. (See section 4.2.5.a for Dual Ramp info.)
Either OLR will trip the TE Series, which will display [ Ptc] and light
the "Overload" LED.
86
120VAC CONTROL POWER
2S2W Starter
(Logic not shown for clarity)
.
MF
MS MF
1 2 3
6 7
TE-TB1
TE- TB1
(24VDC)
( Ramp 2 )
External 2-Speed 2-Winding (2S2W ) Starter
MF
Fast
Over Load
A1 A2
VMX-TB-2
MS
MF
Slow
Fast
OL
OL
10
9
TE-TB1
(PTC Input)
TE...-BP Series
Control Wiring