Siemens Argus 7SR21 Technical Manual page 584

7SR210 & 7SR220 Commissioning & Maintenance Guide
Inject 1 A 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 1 A 1P unbalance current without 3P balanced current. Measure 46BC operating time.
46BC Delay setting
3.4.1 E
LEMENT
The Broken Conductor element can be blocked by Binary Input Inhibit. This functionality should be checked.
Page 72 of 82
B
LOCKING
Element
46BC
1P unbalance current
(% of 3P current)
75%
100%
129%
161%
200%
1P unbalance current (A)
Measured
© 2013 Siemens Protection Devices Limited
Measured Unbalance
current
BI Inhibits