3TX7402-3SY2 データシートの表示（PDF） - Siemens AG

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3TX7402-3SY2

Power Contactors 3TF

Siemens AG 

Auto Transformer starter

b) Auxiliary circuit for momentary-contact control

a) Main Circuit

Please refer page no. 70 for selection of switchgear for autotransformer starting method

Internal connection diagram for DC coil circuits

S0 = ‘OFF’ Push button

S1 = ‘ON’ Push button

K1 = Star contactor

K2 = Transformer contactor

K3 = Main contactor

K5 = Contactor relay

(2NO + 2NC)

K4 = Time relay (7PU6020)

F1 = Main circuit fuses

F2 = Overload relay

F3 = Control circuit fuse

K1 : Sizes 3 to 6,

3TF46 to 3TF51

K1 : Sizes 8 to 12

3TF52 to 3TF56

K2 : 3TF30 10 OB.. for 3TF52-55

3TF32 00-OB.. for 3TF56

The control circuits indicated by dotted lines are to be wired by customer.

K1 : Size 12

3TF57

K2 : 3TC44 17 4A..

16

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