Parameter:
Pickup Option
•
Default setting:
All
This setting defines whether pickup is initiated when an undercurrent condition is detected on
Any
phase
or is only initiated when an undercurrent is detected on
All
phases.
Parameter:
Setting
•
Default setting: 0.25 x I
n
(0.25 I
rated
)
The setting to be appropriate to the respective application.
A pickup value of 10 % is a practicable value for fault indications of electrical machines.
Parameter:
Delay
•
Default setting:
0 s
No specific recommendation is given: The setting to be appropriate to the respective application.
Parameter:
UC Guard Inhibit
•
Default setting:
Yes
Current elements can be blocked if all phase currents fall below setting.
Settings Menu
Functions > Function Config
Parameter
Range
Settings
Default Gn1
Gn2
Gn3
Gn4
37 Undercurrent
Enabled
Disabled
Disabled
Functions > Protection > 37 > Gn 37 Common
Parameter
Range
Settings
Default Gn1
Gn2
Gn3
Gn4
UC Guard Setting
0.05 to 5 I
rated
, Δ 0.05 I
rated
0.1 ⋅
I
rated
Functions > Protection > 37 > Gn 37-n
Parameter
Range
Settings
Default Gn1
Gn2
Gn3
Gn4
Element
Enabled
Disabled
Disabled
Setting
0.05 to 5 I
rated
, Δ 0.05 I
rated
0.25 ⋅
I
rated
Delay
0 to 20 s Δ 0.01 s
20 to 100 s Δ 0.1 s
100 to 1000 s Δ 1 s
1000 to 10000 s Δ 10 s
10000 to 14400 s Δ 100 s
1 s
UC Guard Inhibit
Yes
No
Yes
5.5.5
Protection and Automation Functions
5.5 37 Undercurrent Protection – Phase
Reyrolle 7SR5, Transformer Protection Device, Device Manual
173
C53000-G7040-C015-1, Edition 11.2019
Содержание Reyrolle 7SR5
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