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Instruction manual
Electric Actuators Type EA15-250
3.6.4 Overload protection
The supply unit of the actuator has an overload protection that protects the DC motor and the power supply from overheating. The
overload protection is activated as soon as the load exceeds the torque range. The actuator motor resumes as soon as the load is in
the torque range and the temperature/current has gone down.
3.6.5 Safety position
During a power outage, the actuator remains in its current position. If the actuator is fitted with the “fail-safe return unit” accessory,
it can automatically move to a predefined safety position (OPEN or CLOSE), in case of a power outage.
3.6.6 Heating element
The integrated heating element prevents condensation or icing inside the housing. It starts heating from a preset value. The value
depends on the ambient temperature, at which the actuator is operated, and can be set manually. The default setting is <0 °C / <32
°F. When the heating element is active, the dot on the 7 segment display is illuminated.
3.6.7 Emergency manual override
The integrated emergency manual override is used to run the actuator manually into another position. The integrated emergency
manual override allows the operation of the actuator to be maintained for a short time if there is no current applied, e. g. during
putting into operation or during a power outage.
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