Sharp CP-SR421 Instrukcja Użytkownika Pobierz pdf (Strona 266)

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101

11. Options and peripheral devices

11 - 49

(2) Selection example

Indicated below is an example of selecting a leakage current breaker under the following conditions.

Servo motor

HG-KR43

2 mm

× 5 m2 mm

× 5 m

Ig1 Iga Ig2 Igm

Servo amplifier

MR-J4-40B

Use a leakage current breaker designed for suppressing harmonics/surges.

Find the terms of Equation (11.1) from the diagram.

Ig1 = 20 •

1000

= 0.1 [mA]

Ig2 = 20 •

1000

= 0.1[mA]

Ign = 0 (not used)

Iga = 0.1 [mA]

Igm = 0.1 [mA]

Insert these values in Equation (11.1).

Ig  10 • {0.1 + 0 + 0.1 + 1 • (0.1 + 0.1)}

 4 [mA]

According to the result of calculation, use a leakage current breaker having the rated sensitivity current

(Ig) of 4.0 [mA] or more.

A leakage current breaker having Ig of 15 [mA] is used with the NV-SP/SW/CP/CW/HW series.

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