7SR224 Argus Commissioning & Maintenance Guide
©2010 Siemens Protection Devices Limited Chapter 6 Page 61 of 73
Inject 1A of balanced current. Gradually increase imbalance current, operating level should be as follows:
46BC Setting 1P unbalance current
(% of 3P current)
20% 75%
25% 100%
30% 129%
35% 161%
40% 200%
46BC Setting 3P balanced current (A) 1P unbalance current (A) Measured Unbalance current
Apply 1A 1P unbalance current without 3P balanced current. Measure 46BC operating time.
46BC Delay setting Measured
3.5.1.1 Element Blocking
The Broken Conductor element can be blocked by Binary Input Inhibit. This functionality should be checked.
Element BI Inhibits
46BC
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