Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

4.5 SERVOPACK Overload Characteristics and Allowable Load Moment of Inertia4.5 SERVOPACK Overload Characteristics and Allowable LoadMoment of Inertia4.5.1 Overload CharacteristicsSERVOPACKs have a built-in overload protective function that protects the SERVOPACKs and servomotorsfrom overload. Allowable power for the SERVOPACKs is limited by the overload protective function as shownin the figure below.The overload detection level is set under hot start 1 conditions at a servomotor ambient temperature of 40°C(104°F).100001000BOperating time (s)100105A41Rated torqueApprox.Rated torque + Maximum torque2Motor torqueMaximum torqueNote: The overload protection characteristics of A and B in the figure are applicable when theSERVOPACK is combined with one of the following servomotors.A: SGMAH or SGMPH servomotor with a capacity of maximum 400 W.B: SGMAH or SGMPH servomotors with a capacity more than 400 W and SGMGH, SGMSH,SGMDH, and SGMUH servomotors.TERMS1 Hot StartA hot start indicates that both the SERVOPACK and the servomotor have run long enough at the rated load to be thermallysaturated.4-19