Siemens 7SR224 Technical Manual page 287

Inject 1A of balanced current. Gradually increase imbalance current, operating level should be as follows:
46BC Setting
20%
25%
30%
35%
40%
46BC Setting 3P balanced current (A)
Apply 1A 1P unbalance current without 3P balanced current. Measure 46BC operating time.
46BC Delay setting
3.5.1.1 Element Blocking
The Broken Conductor element can be blocked by Binary Input Inhibit. This functionality should be checked.
Element
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1P unbalance current
(% of 3P current)
75%
100%
129%
161%
200%
1P unbalance current (A)
Measured
46BC
7SR224 Argus Commissioning & Maintenance Guide
Measured Unbalance current
BI Inhibits
Chapter 6 Page 61 of 73