Instruction manual

App. - 15
A
PPENDI
X
(10) 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. It is
recommended to use an unbalanced torque-generated machine, such as a vertical motion shaft, so that
unbalanced torque is not more than 70
of the rated torque. When you carry out adhesion mounting of
the servo amplifier, make circumference temperature into 0 to 45
(32 to 113 ) or use it with 75 or
less of effective load torque.
Servo amplifier MR-J3 series has solid-state servo motor overload protection. (The motor full load current
is 115
rated current.)
1000
100
10
1
0.1
0 200 300
Load ration
[
]
100
In operation
In servo lock
Operation time [s]
1000
100
10
1
0.1
0 200 300
Load ratio
[
]
In operation
100
Operation time [s]
In servo lock
1000
100
10
0.1
0
200 300
Load ratio [ ]
100
In operation
1
In servo lock
Operation time [s]
MR-J3-10B(1)-RJ006 MR-J3-20B(1)-RJ006
MR-J3-40B(1)-RJ006
MR-J3-60B(4)-RJ006 to
MR-J3-100B(4)-RJ006
MR-J3-200B(4)-RJ006
MR-J3-350B(4)-RJ006
10000
1000
100
10
1
0200100
300
In operation
Load ratio [ ]
In servo lock
Operation time [s]
10000
1000
100
10
1
0200100
300
In operation
In servo lock
Load ratio [ ]
Operation time [s]
MR-J3-500B(4)-RJ006
MR-J3-700B(4)-RJ006
MR-J3-11KB(4)-RJ006 to
MR-J3-22KB(4)-RJ006