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TE Series Digital Solid State Soft Starters 18 – 1250A
86
Appendix 5 (cont.) External OL Relay Applications
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.
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.
TE Starte
r
.
Bypass
Contacto
r
"BP"
Disconnect
o
r
Circuit
Breake
r
Solid State
.
Over Load
.
G
R
/
L1
T
/
L3
S /
L2
U
/
T1
W
/
T3
V
/
T2
Slow
Over Load
1 2 3
A1 A2
120VAC CONTROL POWER
TE...-BP Series
Control Wiring
TE-TB1
(24VDC)
VMX-TB-2
Fast
Over Load
9
10
TE-TB1
(PTC Input)
Slow
OL
Fast
OL
2S2W
MTR
MS
MF
MS
MF
2S2W Starte
r
(Logic not shown for clarity)
MS
MF
External 2-Speed 2-Winding (2S2W) Starte
r
6 7
MF
TE- TB1
(
Ramp 2 )