Product Description
Page 22 of 62
User Manual QT50 Doc ID 1321 version 2.0 Sept. 2018
Storage
If your actuator cannot be installed immediately, it must be stored it in a dry
place until you are ready to install and connect cables. The actuator does not
come prepared for long time outdoors storage when arriving from Eltorque.
Details on storage temperature is found in
Table 5: System performance
parameters for QT50 actuators
on page
17
.
If the actuator can be mechanically installed, but not cabled, please ensure that
all glands and gland holes are thoroughly tightened to avoid ingress of moist.
The actuator’s IP rating is not valid until correctly installed.
Eltorque cannot accept responsibility for deterioration caused on site if the
actuator has been opened in ways not described as required in this manual. In
principle, the product should be powered within three years after production to
prevent components from derating. All actuators are thoroughly tested before
shipping to give trouble-free operation, if installed and commissioned properly.
Engineering
Electrical installations shall be designed and installed by personnel with
certifications according to applicable laws and regulations. Ensure that all
such work is done according to applicable laws and regulations.
It important to consider the number of actuators in both the power loop and the
signal loop when using bus-based communication. The loop list should be
finalized and approved before installation of the cable is started.
In case of power loss, none of the actuators in that power loop can be remotely
operated. In case of a signal loss, none of the actuators on that signal loop can
be remotely operated. Manual operation is however possible in both scenarios.
Power circuit design
Power consumption
The power consumption varies
depending on whether the actuator is in standby
mode or is running, see Table 5: System performance parameters for QT50
actuators on page 17. Inrush current after loss of power might be high. It is
therefore recommended to design the circuit in accordance with information
given in chapter 7.1. The tripping energy of the fuse must be confirmed to
ensure a trouble-free operation. Eltorque have done calculations and testing and
have a recommendation for the number of actuators on different fuse
characteristics and sizes. Feel free to contact your local Eltorque representative
for more information.
Duty performance
Eltorque actuators may be used according to IEC 60034-1 duty type S2.
Duty performance as defined by EN 15714-2
Industrial Valves – Actuators, chapter 4.7:
For class A - ON/OFF operation, duty performance is defined as the minimum
number of cycles per hour, 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
