Siemens 7SR18 Solkor - Element Blocking

7SR18 Commissioning & Maintenance Guide
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of
Calculated Timing values in seconds for TM =1.0
Curve 2 xIs 5 xIs
IEC-NI 10.03 4.28
IEC-VI 13.50 3.38
IEC-EI 26.67 3.33
IEC-LTI 120.00 30.00
ANSI-MI 3.80 1.69
ANSI-VI 7.03 1.31
ANSI-EI 9.52 1.30
Note that the operate time may be subject to the Minimum op time setting for the element and/or may have a
Follower DTL applied.
3.6.3 ELEMENT BLOCKING
The Measured Earth Fault elements can be blocked by Binary Input Inhibit and Inrush Detector operation. This
functionality should be checked.
Element BI Inhibits Inrush Detector
51G-1
51G-2
50G-1
50G-2