Mitsubishi Q62DAN Manual de usuario descargar pdf (Pagina 21)

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MELSEC-Q

1 GENERAL SPECIFICATIONS AND PRECAUTIONS FOR USE OF I/O

MODULE

(b) Measures against inrush current

Relay life significantly varies depending on its load type the characteristics of its

inrush current.

Take following measures since the inrush current may cause contact welding.

• In case of an increase in inrush current, select a load so that the inrush current

will be within the rated current of the module.

• Connect the relay that can sustain inrush current outside the module.

1) Inductive load

Inrush current of inductive load may flow 20 times as large as the rated

current depending on a load.

[Load of a solenoid]

io 10 to 20 times

0.07 to 0.1

seconds

i: Inrush current

io: Rated current

[Load of a magnetic contactor]

io 3 to 10 times

0.017 to 0.033 seconds

(1 to 2 cycles)

i: Inrush current

io: Rated current

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Mitsubishi Q62DAN Manual de usuario Pagina 21