Siemens SIRIUS 3RU - Page 71

Configuration
6.5 Safety instructions for use in hazardous areas (3RB)
SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
Manual, 09/2016, A5E03656507420A/RS-AB/003
71
RESET
Resetting the electronic overload relay is described in the Chapter "RESET after release
(Page 117)".
User test (device test)
Testing in accordance with EN 60079-17 can be combined with the user test. Operation of
the device must be discontinued if the test result is negative.
CAUTION
Qualified personnel required
The test must be performed by a qualified person familiar with the specified standards.
Initialization
● The three phase currents that flow through the 3RB electronic overload relay must be
largely symmetrical.
● The phase currents must amount to ≥ 80 % of the set current I
e
.
● The currents must flow for at least the time t
1
before testing.
● The phase currents must be at least as high as the value of the bottom current setting
marker.
Required loading with
the rated current prior to
pressing the TEST button
CLASS 5E
CLASS 10E
CLASS 20E
CLASS 30E
t
1
[minutes]
3
5
10
15