
7SR210 & 7SR220 Commissioning & Maintenance Guide
Page 72 of 82
© 2013 Siemens Protection Devices Limited
Inject 1 A 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 1 A 1P unbalance current without 3P balanced current. Measure 46BC operating time.
46BC Delay setting
Measured
3.4.1
E
LEMENT
B
LOCKING
The Broken Conductor element can be blocked by Binary Input Inhibit. This functionality should be checked.
Element
BI Inhibits
46BC
Содержание Argus 7SR21
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