Power Protection: Power (32) - 7Sr22; Figure 3.17-1 Logic Diagram: Power Protection (32) - Siemens Argus 7SR21 Technical Manual

7SR210 & 7SR220 Description of Operation
3.17 Power Protection: Power (32) – 7SR22
Two under/over power elements are provided and can measure real, reactive or apparent power.
Gn 32-n Setting sets the pick-up power level for the element.
Under-power or over-power operation can be set by the Gn 32-n Operation setting.
Gn 32-n 1ph/3ph Power allows the settings to be based on any one phase exceeding the power pick up level or
on the total power of all three phases.
An output is given after elapse of the Gn 32-n Delay setting.
Operation of the under/over power elements can be inhibited when:
The measured current is below the Gn 32-n U/C Guard setting
A VT Fail condition is detected
Inhibit 32-n
Gn 32-n Element
Enabled
Gn 32-n VTS
Action
Inhibit
VT Fail
Inhibit 32-n
Gn 32-n U/C
Guarded
Enabled
Gn 32-n U/C Guard
Setting
<
<
<
I
L1
I
L2
I
L3
V
1
V
2
V
3
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A binary or virtual input.
&
&
&

Figure 3.17-1 Logic Diagram: Power Protection (32)

Gn32: Operation: Under/Over
Gn32: 1ph/3ph Power
Gn32: Power: P, Q, R
Gn32: Direction
Gn32: Setting
En.
&
-W +W
-VAr -VAr
-W +W
+VAr +VAr
©2018 Siemens Protection Devices Limited
Gn 32-n Delay
32-n
General Pickup