Page 418 - Industrial Power Engineering and Applications Handbook

13/392 Industrial Power Engineering and Applications Handbook

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sw

m
I
r
LL

C

m
I
+
r

OK On Off
trip
Figure 13.52 Simple DOL starter

Figure 13.54 DOL starter with CT-operated over-current relay
(i) For a high-rating motor or
(ii) For a heavy-duty motor (irrespective of rating)

O V D h l

L Figure 13.53 - DOL starter with provision for remote
control and starting and/or running
interlocks
Figure 13.54 - DOL starter with CT-operated
overcurrent relay
(i) For a high-rating motor or
(ii) For a heavy-duty motor (irrespective
of rating)
Figure 13.55 - Reversing DOL starter
Figure 13.56 - Star-delta starter
.
Figure 13.57 - Auto transformer starter
Figure 13.58 - Primary resistance starter
Figure 13.59 - Dual-speed starter
Figure 13.60 - Three stage stator-rotor starter
Running
Figure 13.61 - Schematic for panel space heater and
interlock
internal illumination
ICI
I 3 Figure 13.62 - Schematic for instrument wiring
trip Note
All control schemes shown with auxiliary contactors and timers
Figure 13.53 DOL starter with provision for remote control can be easily replaced with PLCs and microprocessor-based controls.
and starting and/or running interlocks Refer to Section 13.2.3 for more details.