Product Description
User Manual QT50 Doc ID 1321 version 2.0 Sept. 2018
Page 23 of 62
rated torque for at least 5 % at each end of travel, with a cumulative operating
time not exceeding 15 minutes in one hour." (EN 15714-2, chapter 4.7.2.2, a.).
For class B - inching/positioning, duty performance is defined as the minimum
number of starts per hour, where "one start consists of a movement of at least 1°
in either direction, with a load of at least 30 % of the rated torque. The cyclic
duration factor (i.e. the ratio between the running period and total period)
shall be not less than 25 % (e.g. 1 s. running and 3 s. resting)" (EN 15714-2,
chapter 4.7.2.2, b.)
For classes C and D - modulating and continuous modulating, duty performance
is defined as the minimum number of starts per hour, where "one start consists
of a movement of at least 1°. in either direction, with a load of at least 30 % of
the rated torque" (EN 15714-2, chapter 4.7.2.2, c.).
Duty performance as defined by IEC 60034-1
Rotating electrical machines, chapter 4.2:
Duty type S2: "Operation at constant load for a given time, less than that
required to reach thermal equilibrium, followed by a time de-energized and at
rest of sufficient duration to re-establish machine temperatures within 2 K of the
coolant temperature." (IEC 60034-1, chapter 4.2.2)
Endurance
QT50 actuators may be used classes A and B – 10 000 cycles per lifetime.
Endurance is defined according to EN 15714-2, chapter 4.1 and Annex A.
For classes A and B - ON/OFF operation and inching/positioning, endurance
defines the minimum number of cycles to be endured per life time, where "one
cycle consists of nominal 90°. angular travel in both directions (i.e. 90° to open +
90° to close), based on an average load of at least 30 % of the rated torque with
the ability to transmit 100 % of the rated torque for at least 5 % at each end of
travel, with a cumulative operating time not exceeding 15 minutes in one hour."
(EN 15714-2, chapter 4.1.2, b.)
For class B - inching/positioning, duty performance is defined as the minimum
number of starts per hour, where "one start consists of a movement of at least 1°
in either direction, with a load of at least 30 % of the rated torque.
The cyclic duration factor (i.e. the ratio between the running period and total
period) shall be not less than 25 % (e.g. 1 sec running and 3 sec resting)" (EN
15714-2, chapter 4.7.2.2, b.)
Shielding considerations
Shielded cables and appropriate cable glands should be used if the actuator is
installed near to or connected in the same network as equipment emitting high
levels of disturbances. Communication interface considerations
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