Parameter Value Description
No The element is not inhibited by the autoreclose sequence design.
Yes The element will be inhibited during any autoreclose shot which is designated as
delayed. Incorrect configuration can result in no protection being enabled.
Settings Example
There should be little or no current flowing to earth in a healthy system so earth fault relays can be given far
lower pickup levels than relays which detect excess current above load current in each phase conductor. Earth
fault relays are important where the fault path to earth is a high-resistance one (such as in highly arid areas) or
where the system uses high values of earthing resistor/reactance as any earth fault current that flows in the
phase conductors will be limited.
Settings Menu
Configuration > Function Config
Parameter Setting Options Settings
Default Gn1 Gn2 Gn3 Gn4
51GS Sensitive Earth Fault Enabled
Disabled
Disabled
Functions > Protection > 51GS > Gn 51GS-n
Parameter Setting Options Settings
Default Gn1 Gn2 Gn3 Gn4
Element Enabled
Disabled
Disabled
Dir. Control
9
Non-Dir
Forward
Reverse
Non-Dir
Setting 0.005 to 0.1 ⋅ I
rated
, Δ 0.001
I
rated
0.105 to 1 ⋅ I
rated
, Δ 0.0051
I
rated
0.5 ⋅
I
rated
Char DTL
IEC-NI
IEC-VI
IEC-EI
IEC-LTI
ANSI-EI
ANSI-MI
ANSI-VI
IEC-NI
Time Mult (IEC/ANSI) 0.01 to 1.6, Δ 0.01
1.6 to 5, Δ 0.1
5 to 100, Δ 1
1
Delay (DTL) 0 to 20 s Δ 0.01 s 5 s
Min Operate Time 0 to 20 s Δ 0.01 s 0 s
Follower DTL 0 to 20 s Δ 0.01 s 0 s
5.19.5
9
Applies only to devices with VT inputs.
Protection and Automation Functions
5.19 51GS Time-Delayed Sensitive Earth Fault – Measured
282 Reyrolle 7SR5, Overcurrent Protection Device, Device Manual
C53000-G7040-C014-1, Edition 11.2019
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