
B-63943EN/02 3.INSTALLATION
- 43 -
Notes
(1) For a better surge absorbing effect, the wiring shown by heavy
line must be as short as possible.
Wire Size: The wire diameter must be 2 mm
2
or
greater.
Wire length: The sum of the length (a) of the wire for
the connection of surge-absorbing element
1 and that (b) of surge-absorbing element 2
must be 2 m or less.
(2) If conducting dielectric strength tests by applying overvoltages
(1000 VAC and 1500 VAC) to the power line, remove
surge-absorbing element 2. Otherwise, the overvoltages would
activate the element.
(3) The nonfuse breaker (5A) is required to protect the line when a
surge voltage exceeding the capacity of the surge-absorbing
elements is applied and the surge-absorbing elements are
short-circuited.
(4) Because no current flows through surge-absorbing elements 1
and 2 during normal operation, the nonfuse breaker (5A) can be
shared by other electric devices on the machine. It can be used
with the control power supply of the servo unit power supply
module or with the power supply for the fan motor of the spindle
motor.