User`s manual

3-11
3
Installation and wiring
3. Installation and wiring
(5) Recommended wire size and wiring accessories
• Select optimal breakers by taking their breaking capacity into account.
• Use an earth leakage breaker (ELB) to ensure safety.
• Use an appropriate copper wire with a heat resistant temperature of 75˚C or more.
• Tighten the terminal screws to the specified torque. Insufficient tightening may
result in a short circuit or fire.
• Select the sensitivity current of the earth leakage breaker (ELB) by taking account of
the total wiring length needed to connect between the robot driver and power
supply and also between the robot driver and robot. When the total wiring length is
shorter than 30 meters, use a 15mA sensitivity current (per one robot driver).
Use an earth leakage breaker compatible with inverters. Conventional breakers may
malfunction by high harmonics generated from an inverter. Contact the breaker
manufacturer for details.
• Refer to the following table when selecting wiring size and wiring accessories for
robot drivers.
Robot
driver
model
Main circuit
power cable
L1, L2, L3
(+)1, (+), RB, (–)
Control power
cable
L1C, L2C
Earth leakage
breaker (ELB) *
Electromagnetic
contactor (MC) *
RD*-05 1.25mm
2
or more 0.5mm
2
or more EX30 (5A) H10C / HK10
RD*-10 1.25mm
2
or more 0.5mm
2
or more EX30 (5A) H10C / HK10
RD*-20 1.25mm
2
or more 0.5mm
2
or more EX30 (5A) H10C / HK10
RDP-25 1.25mm
2
or more 0.5mm
2
or more EX30 (10A) H10C / HK10
* : ELB and MC models listed in the above table are manufactured by Hitachi Industrial
Equipment Systems Co., Ltd.
(Hitachi standard ELB products manufactured from December 1987 are compatible with
inverters.)