3RV1121-4AA10 データシートの表示（PDF） - Siemens AG

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3RV1121-4AA10

Power Contactors 3TF

Siemens AG 

Accessories and ordering data

Surge suppressor (Varistor) for 3TF46-56

1. Mechanical interlocking kit

Mechanical interlock is required when the supply from two

different sources is available. Also the same is required for the

application involving reversing of motor. Here two contactors

are mechanically interlocked with the help of mechanical

interlock kit. This ensures closing of only one contactor at a

time. Thus prevents a short circuit upon load changeover from

one contactor to another.

For Contactor

AC3 Rating

Contactor

9 to 38A

3TF30 to 35

45/63/70A

3TF46/47/47-7

75/85A

3TF48/49

110/140A

3TF50/51

170/205A

3TF52/53

250/300A

3TF54/55

400 A

3TF56

110/170 A

3TF50/52

170/250 A

3TF52/54

MLFB

3TX4 091-1A #

3TX7 466-1YA0

3TX7 486-1YA0

3TX7 506-1YA0

3TX7 526-1YA0

3TX7 546-1YA0

3TX7 566-1YA0

3TX7 526-1YA09

3TX7 546-1YA09

Std. pkg.

(nos.)

10

2

2

2

2

2

2

1

1

#: W/O base plate (not required)

2. Surge suppressor

It is used to reduce the effect of switching overvoltages created

during the opening of inductive circuits. Typically they are

mounted outside the body of the contactor, and are connected

in parallel with the coil terminals. Various techniques for the

suppression of switching overvoltages can be employed. For

example: RC element, Varistor etc.

Coil Voltage

AC

DC

Less than 48V

24 - 70V

48 - 127V

70 - 150V

127 - 240V

150 - 250V

240 - 400V

–

400 - 600V

–

Type

3TX7 462-3GY1

3TX7 462-3HY1

3TX7 462-3JY1

3TX7 462-3KY1

3TX7 462-3LY1

Std. pkg.

(nos.)

10

Surge suppressor (RC Element) for 3TF30-3TF35

Coil Voltage

AC

DC

24 - 48V

24 - 70V

48 - 127V

70 - 150V

127 - 240V

150 - 250 V

240 - 400V

–

400 - 460V

–

Type

3TX7 402-3RY2

3TX7 402-3SY2

3TX7 402-3TY2

3TX7 402-3UY2

3TX7 402-3VY2

Std. pkg.

(nos.)

10

3. Connector

The 3TS90 connector is used to mount the motor protection

circuit breaker 3VU on the contactor 3TF with screw terminals.

It enables mechanical and electrical connection between

contactor and motor protection circuit breaker.

RC Element:

RC element

The effective increase in the capacitance of

the coil circuit reduces the amplitude and rate

of rise of switch off overvoltage spikes to such

an extend that no rapid restriking occur.

Varistor:

Varistor

Varistor limit the maximum value of the

overvoltage because they become highly

conductive above a threshold value. Until this

threshold value is reached shower discharge

occurs for small duration.

Selection table:

Surge suppressor (Varistor) for 3TF30-3TF35

Coil Voltage

AC

DC

24 - 48 V

24 - 70V

48 - 127V

70 - 150V

127 - 240V

150 - 250V

240 - 400V

–

400 - 600V

–

Type

3TX7 402-3GY1

3TX7 402-3HY1

3TX7 402-3JY1

3TX7 402-3KY1

3TX7 402-3LY1

18

Std. pkg.

(nos.)

10

Range:

Size

of

connector

MPCB

MLFB

Current

Rating

Contactor

MLFB

AC3

Current

Rating

I

3VU13 0.16 to 3TF30 / 31 9 / 12 A

20A

II

3VU13 6 to 25A 3TF32 / 33 16 / 22A

MLFB of

Connector

3TS90 01-8K

3TS90 02-8K

Std.

pkg.

(nos.)

1

1

Benefits:

Direct mounting of 3VU MPCB on 3TF contactor eliminates the

need of power wiring and ensures secure connection. In addition,

the assembly time and size of the feeder is reduced which results

in cost saving. The overall assembly also looks contemporary.

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