3TF5102-0D データシートの表示（PDF） - Siemens AG

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3TF5102-0D

Power Contactors 3TF

Siemens AG 

Contactors for Hoisting Duty

AC slipring motors are most commonly used for the hoisting applications. AC2 duty pertains to starting

and switching off the slipring motors. In case of hoisting duty breaking current is the starting current

and frequency of switching is high.

The table shows the making and breaking capacity at normal and

at hoisting application where Ie indicates the rated full load

current.

During Normal operation at full load

Hoisting application at full load

During Normal operation at

partial load

Making

2.5 * Ie

2.5 * Ie

less than 2.5 * Ie

Breaking

Ie

2.5 * Ie

Less than Ie

Application

AC-2 operation is the typical duty for starting and switching off

fully-loaded slipring motors in the starting phase. The rating of

the contactor, to switch the motors, is selected primarily on the

basis of rated make & break capacity and desired electrical

endurance.

Standard

The contactors comply with the “Regulations to low voltage

switchgear” of DIN VDE 0660 and IS/IEC 60947-4-1.

Range

Operator safety

• Arc Chamber Interlock

It prevents the contactor from switching ON, if the arc chamber

is not fitted properly. Thus avoids accidents to plant and

personnel.

• Finger touch proof terminals

It protects against accidental contact with live parts which

ensures operator safety.

Hoisting duty contactors are available from 110A to 400A

(AC2/AC3 rating).

Benefits and features

Long life

• “Hoisting Duty “Contactors are provided with new design of

contacts (AgSnO2 instead of AgCdO) resulting in high

electrical and mechanical life.

• They are electrically superior in taking care of excessive stresses

coming on contactors during their operations in crane

applications.

Reliability

• The “Hoisting Duty” Contactors have vacuum impregnated coils

which are suitable for high frequency switching and high

vibrations. This helps in reducing coil failures.

High performance

• No duration upto 55°C

Contactors are suitable for operation in service temperature

upto 55°C without derating. This avoids selection of higher

rated contactor, thereby reducing cost.

Selection and ordering data

Hoisting duty contactors –

For high switching frequency / inching applications with AC

coils, 2NO+2NC aux. contacts

Contactor

size

6

8

10

12

Rated current Ie (A)

AC2/AC3 at 415V

110

170

250

400

Type

3TF50 00-0A..

3TF52 00-0A..

3TF54 00-0A..

3TF56 00-0A..

Std. pkg.

(nos.)

1

• Side mounted auxiliary contact blocks are screw mounted and

not snap fitted to withstand vibrations and high frequency

operation.

Coil voltages:

Coil voltage - 50Hz

110V

Code

F0

(Other coil voltages are also available)

230V

P0

415V

R0

25

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