7SR210 & 7SR220 Commissioning & Maintenance Guide
Page 42 of 82
© 2013 Siemens Protection Devices Limited
2.7.1 Definite Time NPS Overcurrent. (46DT)
If DTL setting is small, gradually increase current until element operates.
If DTL is large apply 0.9x setting, check for no operation, apply 1.1x setting, and check operation.
Apply 2x setting current if possible and record operating time
Phase
Is
(Amps)
DTL
(sec)
P.U. Current
Amps
Tolerance
Operate Time
2 x Is
Tolerance
NPS
Check correct indication, trip output, alarm contacts, waveform record.
2.7.2 Inverse Time NPS Overcurrent. (46IT)
It will be advantageous to map the function being tested to temporarily drive the relevant Pickup output in the
Pickup Config
sub-menu in the
Output Config
menu as this will allow the Pick-up led to operate for the function.
Gradually increase current until Pickup LED operates.
Apply 2x setting current and record operating time.
Apply 5x setting current and record operating time.
Compare to calculated values for operating times
P.U.
D.O.
&
TIMING
TESTS
Ph.
Dir
Char.
(NI EI VI LTI,
DTL)
Is
(A)
TM
Operate Current
Operate Time
P.U.
(Amps)
D.O.
(Amps)
Tol
2 x Is
(sec)
5 x Is
(sec)
Tol
NPS
Calculated Timing values in seconds for TM =1.0
Curve
2 xIs
5 xIs
IEC-NI
10.03
4.28
IEC-VI
13.50
3.38
IEC-EI
26.67
3.33
IEC-LTI
120.00
30.00
ANSI-MI
3.80
1.69
ANSI-VI
7.03
1.31
ANSI-EI
9.52
1.30
Note that the operate time may be subject to the
Minimum op time
setting for the element and/or may have a
Follower DTL
applied.
Summary of Contents for Argus 7SR21
Page 1: ...Energy Management 7SR21 7SR22 Argus Overcurrent Relay Reyrolle Protection Devices ...
Page 2: ......
Page 4: ...Contents 7SR11 and 7SR12 Page 2 of 2 2018 Siemens Protection Devices Limited ...
Page 185: ...7SR210 Settings Guide Unrestricted 2018 Siemens Protection Devices Limited Page 61 of 61 ...
Page 277: ...7SR220 Settings Guide Unrestricted Page 72 of 107 2013 Siemens Protection Devices Limited ...
Page 382: ...7SR220 Technical Manual Chapter 4 Page 2 of 96 2017 Siemens Protection Devices Limited ...
Page 386: ...7SR220 Technical Manual Chapter 4 Page 6 of 96 2017 Siemens Protection Devices Limited ...
Page 398: ...7SR220 Technical Manual Chapter 4 Page 18 of 96 2017 Siemens Protection Devices Limited ...
Page 414: ...7SR220 Technical Manual Chapter 4 Page 34 of 96 2017 Siemens Protection Devices Limited ...
Page 466: ...7SR220 Technical Manual Chapter 4 Page 86 of 96 2017 Siemens Protection Devices Limited ...
Page 468: ...7SR220 Technical Manual Chapter 4 Page 88 of 96 2017 Siemens Protection Devices Limited ...
Page 470: ...7SR220 Technical Manual Chapter 4 Page 90 of 96 2017 Siemens Protection Devices Limited ...
Page 472: ...7SR220 Technical Manual Chapter 4 Page 92 of 96 2017 Siemens Protection Devices Limited ...
Page 643: ...Unrestricted ...