ATEX
3.1 Safety and commissioning instructions for hazardous areas
SIRIUS 3RN2 thermistor motor protection relay
18 Manual, 10/2016, A5E34244868002A/RS-AA/001
Install the measuring circuit cables as separate control cables. Use of cores from the power
supply cable of the motor or any other main supply cables is not permitted. If extreme
inductive or capacitive interference is expected as a result of power lines routed in parallel,
use shielded control cables.
When used in a hazardous area, the thermistor motor protection relays must not be
operated with automatic RESET (terminals Y1 and Y2 permanently jumpered).
Repeat testing in accordance with EN 60079-17 can be combined with the user test.
Operation of the SIRIUS 3RN2 thermistor motor protection relay must be discontinued if test
results are negative.
The test must be performed by a qualified person familiar with the specified standards.
The test function can be activated and a trip simulated by pressing the blue TEST/RESET
button for > 2 s. Correct function is only ensured if the unit is tripped.
These devices are maintenance-free.
Only the manufacturer may perform repairs on the SIRIUS 3RN2 thermistor motor protection
relay.
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