2 ST 1, STR 1
The Installation, Service and Maintenance Instructions are drawn up according to requirements of EC Executive
Nr. 89/392/EEC "Uniform requirements for machines and devices from the point of view of safety and health
care", to save life and health of users and to avoid material damages and exposure environment to danger.
1. General data
1.1 Purpose and applications
Electric linear thrust actuators (hereinafter EA) of ST 1 or STR 1 types with constant speed are high-
powered electric-mechanical products, designed for direct installations onto controlled devices (regulating bodies
-valves, etc.). EA of ST 1 types are provided for remote control of closing bodies, and EA of STR 1 types for
automotive control of regulating bodies in both directions of their movement. They can be equipped with means
of measuring and control of technological processes where an unified analogue direct current or voltage signal is
an information bearer on their input and/or output. They can be used in heating, energy, gas, air-conditioning
and other technological systems, which they are suitable for, regarding their features. They are connected with
controlled devices with a flange according to DIN 3358 or using a pillars and flanges.
1. Do not count with tight closing performed by control signals of EA STR 1.
2. It is forbidden to use EA as a lifting mechanism!
3. Switching of actuator by a semiconductor switches have to be consulted with producer.
1.2 Safety instructions
EA of ST 1 and STR 1 types are reserved technical devices with higher rate of danger, with possibility of
installation in areas specially danger regarding casualties caused by electric current. Electric actuators are
according to directive LVD 2014/35/EU and standard EN/IEC 61010-1 within valid edition.assigned for
installation category II (overvoltage category).
Product influence to environment
Electromagnetic compatibility (EMC): the product complies with the requirements of the Directive
2014/30/EU of the European Parliament and of the Council on the approximation of the laws the
Member States relating to the electromagnetic compatibility and with the requirements of standards as
well EN/IEC 61000-6-4+A1, EN/IEC 61000-6-2, EN/IEC 61000-3-2 and EN/IEC 61000-3-3 within valid
edition.
Vibrations caused by the product: product influence is negligible
Noise produced by the product: The maximum allowable noice level (A) of the product measured in a
place of operation is 78 dB (A).
Requirements for professional qualification of people performing installation, service and
maintenance
Electric connection can be performed only by an acquainted person, i.e. an electrical engineer with
professional education of electrical engineering at an apprentice school or a technical school
(secondary, complete secondary or university education) and whose qualification was verified by an
educational facility authorised to verify professional qualification.
Instructions for stuff training
Service can be performed only by workers professionally qualified and trained by the producer or
contracted service centre!
Warning for safety use
Product protection
EA ST 1, STR 1 does not have own short-circuit protection, therefore there must be included suitable
protective device into the supply power ( circuit breaker, or fuse), which serves at the same time as main switch.
Type of equipment from a connection point of view: The equipment is designed for permanent
connection.
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