Current Protection; Phase Overcurrent - Siemens Argus 7SR21 Technical Manual

7SR210 Settings Guide

3.4. Current Protection

3.4.1.

Phase Overcurrent

Description
Gn 51/50 Measurement
Selects whether the RMS value used by the 51 & 50 elements is
True RMS or only calculated at fundamental frequency
3.4.1.1. 51-1
Description
Gn 51-1 Element
Selects whether the 51-1 IDMTL Overcurrent element is enabled
Gn 51-1 Setting
Pickup level
Gn 51-1 Char
Selects characteristic curve to be IEC or ANSI IDMTL or DTL
Gn 51-1 Time Mult (IEC/ANSI)
Time multiplier (applicable to IEC and ANSI curves but not DTL
selection)
Gn 51-1 Delay (DTL)
Delay (applicable only when DTL is selected for characteristic)
Gn 51-1 Min Operate Time
Minimum operate time of element.
Gn 51-1 Follower DTL
Additional definite time added after characteristic time
Gn 51-1 Reset
Selects between an ANSI decaying reset characteristic or a
definite time reset
Gn 51-1 Inrush Action
Selects if the 51-1 element is blocked from operating when 2nd
Harmonic Inrush Detector operates
3.4.1.2. 51-2
Description
Gn 51-2 Element
Selects whether the 51-2 IDMTL Overcurrent element is enabled
Gn 51-2 Setting
Pickup level
Gn 51-2 Char
Selects characteristic curve to be IEC or ANSI IDMTL or DTL
Gn 51-2 Time Mult (IEC/ANSI)
Time multiplier (applicable to IEC and ANSI curves but not DTL
selection)
Gn 51-2 Delay (DTL)
Delay (applicable only when DTL is selected for characteristic)
Gn 51-2 Min Operate Time
Minimum operate time of element.
Gn 51-2 Follower DTL
Additional definite time added after characteristic time
Unrestricted Page 10 of 61
Range
RMS, Fundamental
Range
Disabled, Enabled
0.05, 0.06 ... 2.49, 2.5
DTL, IEC-NI, IEC-VI, IEC-EI, IEC-LTI,
ANSI-MI, ANSI-VI, ANSI-EI
0.025, 0.03 ... 1.595, 1.6 , 1.7 ... 4.9, 5,
6 ... 100
0, 0.01 ... 19.99, 20
0, 0.01 ... 19.99, 20
0, 0.01 ... 19.99, 20
(ANSI) Decaying, 0 ... 59, 60
Off, Inhibit
Range
Disabled, Enabled
0.05, 0.06 ... 2.49, 2.5
DTL, IEC-NI, IEC-VI, IEC-EI, IEC-LTI,
ANSI-MI, ANSI-VI, ANSI-EI
0.025, 0.03 ... 1.595, 1.6 , 1.7 ... 4.9, 5,
6 ... 100
0, 0.01 ... 19.99, 20
0, 0.01 ... 19.99, 20
0, 0.01 ... 19.99, 20
© 2018 Siemens Protection Devices Limited
Default
RMS
Default
Disabled
1 xIn
IEC-NI
1
5 s
0 s
0 s
0 s
Off
Default
Disabled
1 xIn
IEC-NI
1
5 s
0 s
0 s