Siemens SIRIUS 3RT Series System Manual page 766

Glossary
Intrinsic device protection for soft starters
The SIRIUS 3RW40 soft starter features integrated intrinsic device protection, which protects
the thyristors from thermal overload. This is achieved by measuring the current via
transformers in the three phases on the one hand, and also by measuring the temperature
via thermal sensors on the thyristor heat sink. If the internal, permanently set trip value is
exceeded, the soft starter will switch off automatically.
Inverse-time delayed overload release (a release)
A thermal overload release which works with a time delay that decreases as the current
rises.
IO-Link
IO-Link is a new communication standard for sensors and actuators - defined by the
PROFIBUS User Organization (PNO). The IO-Link technology is based on a point-to-point
connection of the sensors and actuators to the control. Therefore, this technology is not a
bus system, but an enhanced version of a classic point-to-point connection. In addition to the
cyclic operating data, comprehensive parameters and diagnostics data are transferred for
the connected sensors and actuators. The connection system consists of a three-pole
standard cable or three single wires.
Leakage current
If semiconductors are used to control the current flow, no galvanic isolation can take place
within the device. This means that, even when the supply is disconnected, if a connected
load is present then a small residual current, known as the leakage current, will still flow.
Low-voltage switchgear and controlgear combination
A switchgear and controlgear combination is a grouping of one or more low-voltage
switching devices with associated equipment for controlling, measuring, and indicating,
together with the associated protective devices and control devices. The manufacturer is
responsible for all assembly work, including all internal electrical and mechanical
connections and structural parts.
Main switch
Every industrial machine which falls under the scope of DIN EN 60204 Part 1 (VDE 0113,
Part 1) must be equipped with a main switch which disconnects all electrical equipment from
the network while cleaning, maintenance, and repair work is being carried out, as well as
during long periods of downtime. Usually a switch which can be operated by hand is
stipulated in order to prevent electrical or mechanical hazards. The main switch can also
function as an EMERGENCY-STOP device.
It must meet the following requirements:
1. Externally accessible handle
2. Only one "Off" position and one "On" position with allocated stops
3. Two positions labeled "0" and "I"
4. Lockable "Off" position
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SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03