Motor Control Gear

1st Edition
Motor Control Gear

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Order no.: V 0082
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0.12.0

V 0082 Content I
Contents
Circuit symbols to DIN 40713 and DIN 40703 and examples ................................. 4
Extract from DIN 40714 and DIN 40715 ................................................ 9
Connection and conductor references in installations conforming IEC 445 and DIN 42 400. ...........11
Code letters to designate the nature of apparatus according to DIN 40 719, sheet 2 Table 1 ..........12
Code letters to designate general functions according to DIN 40 719, sheet 2 Table 2 ...............14
Table of boards for experiments 1.1 to 2.20 in Manual V 0082 ................................15
1 Controls with switches ........................................18
1.1 Motor protection switch .....................................................18
1.2 On/off switch .............................................................22
1.3 Reversing switch ..........................................................26
1.4 Star-delta switch ..........................................................30
1.5 Star-delta reversing switch ...................................................34
1.6 Dahlander pole-changing switch ...............................................38
1.7 Pole-changing switch for motor with separate windings ..............................42
1.8 Instrument selector switch ...................................................46
2 Controls with contactors .......................................52
2.1 Presentation of circuit diagrams ...............................................52
2.2 Simple contactor circuit with self-holding and overcurrent relay .........................54
2.3 Simple contactor circuit with self-holding, overcurrent relay and fault signalling .............59
2.4 Contactor circuit with auxiliary contactor (stored fault signal). ..........................64
2.5 Contactor circuit with time relay, delayed pick-up .................................. 70
2.6 Contactor circuit with time relay, drop-out delay ................................... 75
2.8 Limiting control with limit switch (mechanical) ..................................... 85

II Content V 0082
2.9 Limiting control with limit switches (proximity type) ................................. 90
2.9.a. Open-circuit principle
2.9.b Closed-circuit principle
2.10 Reversing contactor control with contactor interlocking .............................. 99
2.11 Reversing contactor control with interlocking via contactor and pushbutton ...............105
2.12 Star-delta switching .......................................................111
2.13 Automatic star-delta switching. ...............................................117
2.14 Automatic star-delta switching for two directions of rotation. ..........................122
2.15 Pole-changing for two speeds (Dahlander). ......................................128
2.16 Pole-changing circuit for two speeds (for motor with two separate windings) ..............135
2.17 Automatic control of a three-stage rotor starter. ...................................141
2.18 Current-impulse-operated contactor circuit .......................................148
2.19 Control of an installation for reactive current compensation. ..........................153
2.20 Counter-current braking (‘plugging’) with brake monitor. .............................163
3 Bibliography ...............................................168