Overload Protection Characteristics - Mitsubishi Electric MELDAS MDS-B-SVJ2 Series Specifications And Instruction Manual

9-1 Overload protection characteristics

The servo amplifier has an electronic thermal relay to protect the servomotor and servo amplifier from
overloads. The operation characteristics of the electronic thermal relay when standard parameters
(SV021=60, SV022=150) are set shown below.
If overload operation over the electronic thermal relay protection curve shown below is carried out,
overload 1 (alarm 50) will occur. If the maximum current is commanded at 95% or higher continuously
for one second or more due to a machine collision, etc., overload 2 (alarm 51) will occur.
The HA-FF053/13 and HC-MF053/13 have characteristics different from the other motors.
1000.0
100.0
10.0
Fig. 9-1 (1) Overload protection characteristics of MDS-B-SVJ2-01, -03, -04, -06, -07
1000.0
100.0
10.0
Fig. 9-1 (2) Overload protection characteristics of MDS-B-SVJ2-10, -20
1000.0
100.0
10.0
Fig. 9-1 (3) Overload protection characteristics of HA-FF053/13, HC-MF053/13
Chapter 9 Characteristics
When stopped
1.0
0.1
0 50 100
When stopped
1.0
0.1
0 50 100
When stopped
1.0
0.1
0 50 100
When rotating
95% of amplifier or motor
maximum capacity
150 200 250 300
Motor load rate [%]
When rotating
150 200 250 300
Motor load rate [%]
When rotating
95% of motor maximum
capacity
150 200 250 300
Motor load rate [%]
9-2
350 400
350 400
350 400