Omron G5 R88D-KE Series, User Manual

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4 System Design
4 - 26
OMNUC G5-series (Pulse-train Input Type) AC Servomotors and Servo Drives User’s Manual
This section explains the criteria for selecting the connection components required to improve noise
resistance.
Understand each component’s characteristics, such as its capacity, performance, and applicable range
when selecting the connection components.
For more details, contact the manufacturers directly.
When selecting a no-fuse breaker, consider the maximum input current and the inrush current.
Maximum Input Current
• The momentary maximum output of Servo Drive is approximately three times the rated output,
and can be output for up to 3 seconds.
Therefore, select no-fuse breakers with an operation time of at least 5 seconds at 300% of the
rated current ratio. General or low-speed no-fuse breakers is suitable.
• Select a no-fuse breaker with a rated current greater than the total effective load current of all the
motors (when multiple Servo Drives are used). (The rated current of the power supply input for
each motor is provided in 4-2-2 Main Circuit and Motor Connections on page 4-14.)
• Add the current consumption of other controllers, and any other components when selecting.
Inrush Current
• The following table lists the Servo Drive inrush currents.
• With low-speed no-fuse breakers, an inrush current 10 times the rated current can flow for 0.02
second.
• When the power of multiple Servo Drives are turned ON simultaneously, select a no-fuse breaker
with a 20-ms allowable current that is greater than the total amount of the inrush current in the
following table.
4-3-2 Selecting Connection Components
No-fuse Breaker (NFB)
Servo Drive model
Inrush current (Ao-p)
Main circuit
power supply
Control circuit
power supply
R88D-KP01H 14 28
R88D-KP02H 14 28
R88D-KP04H 14 28
R88D-KP08H 29 28
R88D-KP10H 29 28
R88D-KP15H 29 28
R88D-KP20H 29 14
R88D-KP30H 22 14
R88D-KP50H 22 14