
Chapter 1 Specifications Check
28
Note 1 Rush current at the power connection continues for 5 msec. Note that the value of in-rush current
differs depending on the impedance of the power supply line.
Note 2 Leak current varies depending on the capacity of connected motor, cable length and the surrounding
environment. Measure the leak current at the point where a ground fault circuit interrupter is to be
installed when leakage protection is conducted.
Regarding the leakage breaker, it is necessary to have a clear purpose for selection such as a fire
protection or protection of human body.
Note 3 Power supply is not necessary if PIO is not to be used.
Note 4 EtherNet/IP can also communicate (teletype procedure communication) with EtherNet.
1.2.1 Selection of the Circuit Breaker
For the selection of the circuit breaker, perform it according to the following items.
Select the breaker that does not trip with the rush current. (Refer to the Operation
Characteristic Curve described in the catalogue of each manufacturer.)
For the rated breaking current, select the current value which can break the current even
when a short circuit occurs.
Rated Interrupting Current > Short Circuit Current = Power Source Current [Refer to 1.2
Basic Specifications]
Consider margin for the rated current on the circuit breaker.
Circuit Breaker Rated Current > Power Source Current [A]
×
Safety Margin (Reference 1.2 to 1.4)
1.2.2 Selection of the Leakage Breaker
Regarding the leakage breaker, it is necessary to have a clear purpose for selection such
as a fire protection or protection of human body.
Leak current varies depending on the capacity of connected motor, cable length and the
surrounding environment. Measure the leak current at the point where a ground fault
circuit interrupter is to be installed when leakage protection is conducted.
Summary of Contents for MSEL
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Page 44: ...Chapter 1 Specifications Check 36 ...
Page 102: ...Chapter 4 Home Return Absolute Reset 94 ...
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