IAI America SSEL - Manual (Page 55)

33
Part 1 Installation
B. Motor power
100 VAC or
200 VAC
Circuit
breaker
Clamp filters
Surge protector
Earth
leakage
breaker
Noise
filter
Class D grounding
(former Class 3
grounding)
24-VDC
power
supply
Brake
release box
PIO connector
Brake power input connector
Controller
AC power input
connector
A. Control power
6. Power Auxiliary
Select and install appropriate power auxiliaries according to the illustration and explanations provided below.
If your product requires CE Marking certification, take proper actions by referring to “CE Marking.”
6.1 Example of Configuration of Power Auxiliaries
[1] Circuit breaker
Install a circuit breaker or earth leakage breaker in the AC power-supply line (primary side) of the controller in
order to prevent damage due to power switching and short current. One circuit breaker or earth leakage breaker
can be used to protect both the motor power supply and control power supply.
x While the actuator is accelerating or decelerating, the controller current increases to three times the
rated current. Select an appropriate circuit breaker that will not trip when this higher current flows. If the
circuit breaker you have selected trips, change it to one with the next higher level of rated current.
x Select a circuit breaker that will not trip due to rush current. [Refer to the graph of operating
characteristics in the manufacturer’s catalog.]
x The rated cutoff current of the selected circuit breaker must be enough to cut off any short-circuit current,
should it flow, without fail.
Rated cutoff current > Short-circuit current = Power-supply capacity on primary side / Power-supply
voltage
x The rated current of the selected circuit breaker should have an ample allowance.
Rated current of circuit breaker > (Rated motor power-supply capacity [VA] + Control power-supply
capacity [VA]) / AC input voltage x Safety factor (rough guide: 1.2 to 1.4)
Rated current of circuit breaker > (Rated motor power-supply capacity [VA] + Control power-supply
capacity [VA]) / AC input voltage x Safety factor (rough guide: 1.2 to 1.4)
[2] Earth leakage breaker
Install an earth leakage breaker on the AC power-supply line side (primary side) of the controller to cut off earth
leakage current. One earth leakage breaker may be used to serve both the motor power and plant power.
x You must select an appropriate earth leakage breaker that can meet your specific purpose, be it fire
protection, protection of human life, or the like. Also measure the earth leakage current at the location
where the earth leakage breaker is to be installed.
x The earth leakage current changes according to the capacity of the motor to be connected, lengths of
cables, and surrounding environment. So that proper earth leakage protection can be provided, measure
the earth leakage current at the location where the earth leakage breaker is to be installed.
x Use an earth leakage breaker of harmonic type.