Tescom STS 1000A 3 Pole, User Manual

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Many thanks for choosing our product in order to protect your equipment
STS automatic static transfer switch (STS), is a device that enables automatic or
manual transfer between two AC power supply sources, ensuring a transfer time of less
than ¼ of a cycle.
The use of STS static transfer switches within an electrical distribution system
provides a means of secure protection against any potential disruption of the power supply,
due to interruptions of the supply source or failure of the distribution lines caused by
environmental phenomena or human error.
The STS series is available in 100-150-200-250-300-400-600-800-1000 Ampere models;
The range is available in three or four pole formats for either three-phase or three-phase plus
neutral switching installations.
The STS provides a guaranteed means of switching between two alternative and
independent power sources thus ensuring a continued supply of power to any critical load.
The switching can either be AUTOMATIC should the incoming supply fall outside the
predefined window of operation (user-defined), or MANUAL should an operator want to
force switching between the two input supply sources from the mimic display panel or via a
remote connection.
ATTENTION
This manual contains instructions for the installation, start up and use of the product.
Read the manual carefully before installing the product.
The manual contains important information with regards to use of the device; therefore it must be read
carefully and should be consulted before activating the STS.
All the installation and maintenance operations inside the device must be conducted exclusively by trained
personnel.
Do not insert any objects in the ventilation slots or in any other openings.
To reduce the risk of electric shock, install the device in sites with controlled ambient temperature and relative
humidity, free of open flames and corrosive substances.
The device has two power input lines. Even if only one of the sources is active, the voltage level inside the
system is dangerous.
When the device is in manual BY-PASS status, the voltage level inside the system is dangerous.
SAFETY REGULATIONS
Always ensure that the ground connection is the first connection to be made during the installation of the
system, this terminal is identified by the following symbol:
THE STS MUST NOT BE OPERATED WITHOUT A GROUND CONNECTION.
The STS must only be operated with all external and internal panels fastened as specified and with the front
door closed.
Do not perform any maintenance activities inside the STS even if only one power source is connected to it.
For maintenance, close either the SW4-1 or SW4-2 by-pass switch and then open all of the other switches.
Always use a multimeter to check that no dangerous voltages are present inside.