7SR210 & 7SR220 Commissioning & Maintenance Guide
Page 14 of 82
© 2013 Siemens Protection Devices Limited
Section 2: Protection Functions
This section details the procedures for testing each protection function of the 7SR21 & 7SR22 relays. These tests
are carried out to verify the accuracy of the protection pick-ups and time delays at setting and to confirm correct
operation of any associated input and output functionality.
The exact model type must be checked to confirm the functions available in each type.
Guidance for calculating test input quantities is given in the relevant test description where required. In many
cases it may be necessary to disable some functions during the testing of other functions, this prevents any
ambiguity caused by the operation of multiple functions from one set of input quantities. The ‘Function Config’
Menu provides a convenient high level point at which all elements of a particular function can be
Enabled/Disabled to suit testing. The ‘Config’ tab in ‘Reydisp Evolution’ can be used to ‘Enable/Disable’ individual
elements. Note that this screen disables functions by applying setting changes to the relay and that any changes
must be sent to the relay to take effect and settings must be returned to their correct value after testing.
The table below indicates functions where function conflicts may occur during testing, consideration should be
given to disabling functions to avoid interference.
Any LED can be assigned to be a General Pickup LED in the Output Matrix menu and can be used to assess
operation of functions during testing if other functions are disabled or if the setting allocating General Pickup is
temporarily modified.
Voltage inputs may not be required for testing of non-directional Overcurrent elements but it may be
advantageous to apply balanced 3 phase nominal rated voltage to the VT inputs during testing to avoid
inadvertent operation of other functions. Particular care should be taken when testing overcurrent functions that
the thermal rating of the current inputs is not exceeded.
Function
Under Test
Phase
Over
cu
rre
nt
Voltage
Con
t O/C
Cold
Lo
ad
Derived
E/F
M
ea
s
ure
d E/
F
Sensiti
ve E/F
Res
tri
ct
ed
E
/F
NPS Ov
ercur
ren
t
Unde
rcu
rr
en
t
The
rmal
Phase
U/O
vo
lt
ag
e
NPS Ov
ervolt
ag
e
U/O Fre
qu
en
cy
CB Fa
il
VT Super
vi
si
o
n
CT s
upe
rvisio
n
Broken C
ond
uc
tor
Trip
cc
t
Supe
rvi
si
o
n
Inrush D
etector
Phase
Overcurrent
O O
O O O
O
O
Voltage Cont
O/C
O
O
O O O
O
O
Cold Load
O
O
O O O
O
O
Derived E/F
O
O O O
O
O O
Measured E/F
O
O O O
Sensitive E/F
O
Restricted E/F
O
NPS Overcurrent
O
O O
O O
O
O
Undercurrent
O O
O
Thermal
O
O O
O
Phase U/O
voltage
O
O O
NPS
Overvoltage
O
O O
U/O Frequency
O
O
CB Fail
O
O O O O O
O
O
VT Supervision
O O
CT supervision
O
O
Broken
Conductor
O
O O
O
O
Trip cct
Supervision
Inrush Detector
Содержание Argus 7SR21
Страница 1: ...Energy Management 7SR21 7SR22 Argus Overcurrent Relay Reyrolle Protection Devices ...
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Страница 4: ...Contents 7SR11 and 7SR12 Page 2 of 2 2018 Siemens Protection Devices Limited ...
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Страница 117: ...7SR210 Instrumentation Guide Unrestricted 2018 Siemens Protection Devices Limited Page 5 of 12 2 Menu Structure ...
Страница 129: ...7SR210 Settings Guide Unrestricted 2018 Siemens Protection Devices Limited Page 5 of 61 1 Function Diagram ...
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Страница 190: ...7SR220 Instrumentation Guide 2017 Siemens Protection Devices Limited Page 5 of 20 2 Menu Structure ...
Страница 194: ...7SR220 Instrumentation Guide 2017 Siemens Protection Devices Limited Page 9 of 20 Frequency 0 000Hz ...
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