Moeller. Wiring manual. Automation and Power distribution

All about Motors

Star-delta switching of three-phase motors

Moeller Wiring Manual 02/05

8-41

8

When the set changeover time has elapsed,

K1/17–18 opens the circuit of Q13 and after

50 ms closes the circuit via K1/17–28 of Q15 .

Star contactor Q13 drops out. Delta contactor

Q15 closes and switches motor M1 to full

mains voltage. At the same time, normally

closed contact Q15/22–21 interrupts the

circuit of Q13, thus interlocking against

renewed switching on while the motor is

running. The motor cannot start up again

unless it has previously been disconnected by

pushbutton 0, or in the event of an overload by

the normally closed contact 95–96 of the

overload relay F2, or via the normally open

contact 13–14 of the motor-protective

circuit-breaker or circuit-breaker.

Automatic star-delta starters SDAINL EM

Pushbutton Two-wire control

K1: Timing relay approx. 10 s

Q11: Mains contactor

Q13: Star contactor

Q15: Delta contactor

Two-way pushbutton

Control circuit device

I = ON

0 = OFF

L1

(Q11/1)

-F2

95

96

0

-S11

13

14

A1

A2

N

-F0

44

21

22

2

13

14

I

-Q11

-Q15

-K1

A1

A2

A1

A2

A1

A2

-Q15

-Q13

43

44

43

-Q11

-Q13

-F0

95

96

-F2

13

14

-S14

13

14

13

14

-Q1

-Q11

14

13

22

21

-Q13

-Q11

-S14

MCS

2

4

1

SW

Q

HAND

-K1

22

21

16

15

18

-Q13

1

L1

(Q11/1)

Q11

21

22

44

14

Q11

96

F2

0

I

14

13

14

13

21

22

A

B

-S11

-Q11

P >

All about Motors

Star-delta switching of three-phase motors

Moeller Wiring Manual 02/05

8-42

8

For connection of further control circuit

devices a section “Control circuit devices

for star-delta starting”, page 8-49

Method of operation

Pushbutton I energizes star contactor Q13, the

normally open contact Q13/14–13 applies

voltage to mains contactor Q11: Q11 closes

and applies mains voltage to motor M1 in star

connection. Q11 and Q13 maintain

themselves via normally open contact

Q11/14–13 and Q11 additionally via

Q11/44–43 and pushbutton 0. Timing relay

Q11 is energized at the same time as mains

contactor K1. When the set changeover time

has elapsed, K1 opens the circuit of Q13 via

the changeover contact 15–16 and closes the

circuit of Q15 via 15–18. Star contactor Q13

drops out.

Delta contactor Q15 closes and switches

motor M1 to full mains voltage. At the same

time, normally closed contact Q15/22–21

interrupts the circuit of Q13, thus interlocking

against renewed switching on while the motor

is running.

The motor cannot be started up again unless it

has previously been disconnected by

pushbutton 0, or in the event of an overload,

by the normally closed contact 95–96 of the

overload relay F2, or via the normally open

contact 13–14 of the motor-protective

circuit-breaker or circuit-breaker.

All about Motors

Star-delta switching of three-phase motors

Moeller Wiring Manual 02/05

8-43

8

Automatic reversing star-delta starter SDAIUL

Reversing

Rating of switchgear

Q11, Q12 = I

e

F2, Q15 = 0.58 x I

e

Q13 = 0.33 x I

e

The maximum motor output is limited by the

upstream reversing contactor, and is lower

than with automatic star-delta starters for only

one direction of operation

Standard version: relay current = motor rated

current x 0.58

For other arrangements of overload relay

a section “Star-delta starters with overload

relay”, page 8-37

M

3

-M1

U1

V1

W1

W2

U2

V2

L1

L3

L2

2

6

4

-Q12

-F2

96

97

95

98

26

4

-Q15

1

5

3

-F1

1

5

3

2

6

4

1

5

3

2

6

4

-Q11

-Q1

PE

2

6

4

13

1 3 5

14

21

22

-Q13

1

5

3

2

6

4

I > I > I >

All about Motors

Star-delta switching of three-phase motors

Moeller Wiring Manual 02/05

8-44

8

Reversing after actuation of pushbutton 0

Three-way pushbutton

Control circuit devices

I = Clockwise

0 = Stop

II = Anticlockwise

L1

(Q11/1)

-F2

0

-S11

A1

A2

N

-F0

44

13

14

II

-Q11

-K1

A1

A2

-Q15

-Q13

43

44

43

-Q11

-Q1

-Q11

I

21

22

95

96

21

22

-Q12

13

14

13

14

-Q12

-K1-K1

-Q12

13

14

13

14

II

I

21

22

21

22

A1

A2

-Q15

-Q13

21

22

-Q12

A1

A2

A1

A2

21

22

21

22

18

17

28

17

0

Q12

13

14

Q11

96

F2

13

14

21

22

I

13

14

A

B

C

13

Q12

II

13

14

21

22

21

22

-S11

All about Motors

Star-delta switching of three-phase motors

Moeller Wiring Manual 02/05

8-45

8

For connection of further control circuit

devices a section “Control circuit devices for

star-delta starting”, page 8-49

Method of operation

Pushbutton I energizes contactor Q11 (e.g.

clockwise), pushbutton II energizes contactor

Q12 (e.g. anticlockwise). The contactor first

energized applies voltage to the motor

winding and maintains itself via its own

auxiliary contact 14–13 and pushbutton 0. The

normally open contact 44–43 fitted to each

mains contactor energizes the star contactor

Q13. Q13 energizes and switches on motor

M1 in the star connection. At the same time,

timing relay K1 starts. When the set

changeover time has elapsed, K1/17–18

opens the circuit of Q13. Q13 drops out.

K1/17–28 closes the circuit of delta contactor

Q15.

Delta contactor Q15 energizes and switches

motor M1 to the delta configuration, i.e. full

mains voltage. At the same time, normally

closed contact Q15/22–21 interrupts the

circuit of Q13, thus interlocking against

renewed switching on while the motor is

running. Motor direction can be changed,

either after pressing pushbutton 0, or by direct

actuation of the reverse button, depending

upon the circuit. In the event of an overload,

disconnection is effected by the normally

closed contact 95–96 of the overload relay F2.

Reversing without actuation of pushbutton 0

Three-way pushbutton

Control circuit devices

I = Clockwise

0 = Stop

II = Anticlockwise

L1

(Q11/1)

-F2

0

-S11

A1

A2

N

-F0

44

13

14

II

-Q11

-K1

A1

A2

-Q15

-Q13

43

44

43

-Q11

18

17

-Q1

-Q11

-K1

-Q11

I

21

22

95

96

21

22

-Q12

13

14

13

14

-Q12

13

14

13

14

II

I

21

22

21

22

A1

A2

-K1

-Q15

-Q13

21

22

-Q12

A1

A2

A1

A2

21

22

21

22

28

17

21

22

13

14

96

14

13

14

13

Q11

F2

0

I

A

B

13

Q12

14

Q12

II

-S11

21

22

21

22

14

13

C

Moeller Wiring Manual 02/05

8-46

All about Motors

8

Star-delta starting with motor-protective circuit-breaker PKZ2

With I

cc

> I

cn

short-circuit proof installation required.

L1 L2 L3

L1

-Q1

L2 L3

T1 T2 T3

L1 L2 L3

T1

13 21

14

-Q11 -Q15

-Q13

22

13

21

14 22

T2 T3

1U

1V

1W

2V

2W

2U

-M1

L1 L2 L3

135

246

T1 T2 T3

Q13

A1

13 21

14

A2

22

L1

U F 690 V

U F

500 V

L2 L3

T1 T2 T3

1.13 1.21

1.14 1.22

A1

A2

A1

A2

M

3

I>> I>> I>>

I>> I>>I>>

I > I > I >

All about Motors

Star-delta starting with motor-protective circuit-breaker PKZ2

Moeller Wiring Manual 02/05

8-47

8

2 x RMQ-Titan, M22-… with indicator light M22-L…T0-1-8 rotary switch

L1

(Q11/1)

-F0

1.13

1.14

21

22

13

14

13

14

13

44

43

A1

A2

-Q1

-S11 -Q11

-Q11

-K1

A1

A2

A1

A2

A1

A2

-Q11

22

21

22

15

18

16

21

-Q13

-Q15

10 s N Y

N

-Q13

-K1

A2

0

I

S11

14

13

22

21

1413

2221

A B

Q1

0I

1.14

Q11 Q11 Q11

43 A214 44

01

S11

Q11

44

Q1

1.14

1

2

3

4

Q11

14

All about Motors

Star-delta starting with motor-protective circuit-breaker PKZ2

Moeller Wiring Manual 02/05

8-48

8

S11 RMQ-Titan, M22-…

Q1

PKZ2/ZM-…

dQ15

S/EZ-PKZ2

yQ13

DIL0M U

e

F 500 V AC

yQ13

S/EZ-PKZ2 U

e

F 660 V AC

K1

ETR4-11-A t t y (s) 15–40

Q11

S/EZ-PKZ2 N Motor

protection

(y) + d

F0

FAZ Setting l

Moeller Wiring Manual 02/05

8-49

All about Motors

8

Control circuit devices for star-delta starting

Automatic star-delta starters SDAINL

Three-wire control

Illuminated pushbutton Two two-way pushbuttons

Two-way pushbutton with

indicator light

Spring-return switch

T0-1-15511 with automatic

return to position 1.

Spring-return switch

T0-1-15366 with automatic

return to position of rest.

Two-wire control

Changeover switch T0-1-15521

with fleeting contact in the

intermediate position

e.g. selector switch

Rotary switch T

Position switch AT

Float switch SW

Pressure switch MCS

F2 Q11 Q11 Q11

Q11

21

2213

14

13

14

21

22

96 13

X1 X2

14

-S11

44

A2

0I

F2

-S11 -S11

2113

14

13

14

13

14

13

14

22

21

22

21

22

21

22

0

A

B

A

B

I0I

96

Q11

14

Q11

44

22

96 13

13

21

14

13

14

21

22

A2 14 44

F2

-S11

Q11 Q11 Q11 Q11

AB C

1

0

Q11

13

14

Q11

96

F2

1

0

1

2*

1

3

4

S11

Start

Q11

13

14

Q11

96

F2

0

1

2*

1

3

4

I

0

1

I

S11

Start

Q11

13

14

Q11

96

F2

2*

1

3

4

I ON

0

OFF

0

1

S11

Q11

14

Q11

44

F2

S14

96

All about Motors

Control circuit devices for star-delta starting

Moeller Wiring Manual 02/05

8-50

8

Three-phase reversing contactor DIUL

reversing star-delta starter SDAIUL

Two-way pushbutton

1)

without

self-maintaining circuit (inching) for

use only with reversing contactors

Three-way pushbutton with indicator light. Reversing

after actuation of pushbutton 0

Spring-return switch

1)

T0-1-8214, without

self-maintaining circuit

(inching)

Automatic return to 0 only for

reversing contactors

Changeover switch

1)

Switch T0-1-8210 remains

in position 1 or 2

Spring-return switch

T0-2-8177 with automatic

return to position 1 or 2

Position switch

Connected by removing the links

between the contactor terminals

Q11/13 and Q12/22 and between

Q12/13 and Q12/22 and interposing

the position switches.

1)

Overload relay always with manual reset

-S11

22

21

14

13

22

21

14

13

III

B

A

13

Q12

13

Q11

96

F2

13

-S11

22

21

14

13

22

21

14

13

22

21

14

13

I

A

B

D

E

C

Q11

A2 21 96

Q12

21 II

Q11

14

Q12

13

Q12F2

0

2

3

4

0

12

1

Q12

13

F2

96

Q11

13

FS 4011

0

12

FS 684

0

12

2

1

2

3

4

5

6

01

7

8

Q11F2

96 13

Q12

13

Q12

14

STARTSTART

FS 140660

0

12

START START

Q11/13

Q12/22

Q12/13

Q11/22

Moeller. Wiring manual. Automation and Power distribution

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