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LIQUID RHEOSTAT LOAD CONTROL
LIQUID RHEOSTAT FOR PLANT LOAD BANK

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CRANE RESISTORS

RESISTOR FRAME STACKING

Motion

Motor Power (kW), 40%ED

Motion

2.2

3.7

5.5

7.5

11

15

22

30

37

45

55

75

90

110

132

160

200

Hoisting

1

1

2

2

3

4

4

5

5

6

4+3

4+4

5+5

6+5

5+4+4

5+5+5

6+6+6

Travelling

Traversing

1

1

1

2

3

3

3

4

4

5

 

 

 

 

 

 

 

 

Motion

Control Method

Control Steps

Remark

Hoisting

R

3, 4, 5

2ndary Resistance Control, Tst = 100%

S

4, 5, 6

S.C Brake Control, Tst UP = 110%, Tst Down = 50%

E

4, 5, 6

E.C Brake Control, Tst UP = 135%, Tst Down = 35%

D

3, 4, 5

Dynamic Control, Tst UP = 120%, Tst Down = 35%

T

3, 4, 5

Thyristor control, Tst UP = 200%, Tst Down = 100%

C

3, 4, 5

Direct Control, Tst = 100%

Travelling
&
Traversing

R

3, 4, 5

2ndary Resistance Control, Tst = 70%

P

4, 5, 6

Plugging Control, Tst = 70%, Plugging Tp = 40%

T

3, 4, 5

Thyristor Control, Tst = 100%

C

3, 4, 5

Direct Control, Tst = 70%

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OTHER RESISTORS

HARMONIC FILTRATION RESISTORS

AC to DC and DC to AC conversion by thyristor-driven converters and inverters is a common requirement
in uninterruptible power supplies, motor drives, speed controls and high voltage transmission links between
unsynchronized distribution systems. Such devices act as sources of undesirable harmonic currents. These
can be reduced to acceptable levels by passive filter circuits incorporating inductors, capacitors and resistors.

 

Example:  3phase 24KV for a Subway Station

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Tel:82-32-817-4325 Fax:82-32-817-4329

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