12.CHARACTERISTICS

12.CHARACTERISTICS

12.1 Overload protection characteristics

An electronic thermal relay is built in the servo amplifier to protect the servo motor and servo amplifier from overloads. The operation characteristics of the electronic thermal relay are shown below. Overload 1 alarm (AL.50) occurs if overload operation performed is above the electronic thermal relay protection curve shown below. Overload 2 alarm (AL.51) occurs if the maximum current flew continuously for several seconds due to machine collision, etc. Use the equipment on the left-hand side area of the continuous or broken line in the graph.

In a machine like the one for vertical lift application where unbalanced torque will be produced, it is recommended to use the machine so that the unbalanced torque is 70% or less of the rated torque.

(1) MR-J2S-10A to MR-J2S-100A

HC-KFS series HC-MFS series HC-SFS series HC-UFS series

1000

 

 

 

 

 

 

 

 

 

 

 

 

During rotation

100

 

 

 

 

 

 

time[s]

 

 

During stop

 

 

 

Operation

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

0

50

100

150

200

250

300

Load ratio [%]

Fig 12.1 Electronic thermal relay protection characteristics 1

(2) MR-J2S-200A to MR-J2S-350A

HC-SFS series HC-RFS series HC-UFS series

1000

 

 

 

 

 

 

 

 

 

 

 

 

During rotation

100

 

 

 

 

 

 

time [s]

 

 

 

 

 

 

 

Operation

10

 

 

 

 

 

 

 

 

During stop

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

0

50

100

150

200

250

300

Load ratio [%]

Fig 12.2 Electronic thermal relay protection characteristics 2

12 - 1

Page 188
Image 188
Mitsubishi Electronics MR-J2S- A instruction manual Overload protection characteristics, MR-J2S-10A to MR-J2S-100A