Siemens Argus 7SR21 Technical Manual page 568

7SR210 & 7SR220 Commissioning & Maintenance Guide
Vs
Phase
(Volts)
E
Check correct indication, trip output, alarm contacts, waveform record.
2.10.7 Inverse Time (59NIT)
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 voltage until Pickup LED operates.
Apply 2x setting voltage and record operating time,
Apply a higher multiple of setting voltage and record operating time.
Compare to calculated values for operating times from:
Where M = Time multiplier and Vn/Vs = multiple of setting.
P.U.
D.O. Ph.
&
TIMING
E
TESTS
2.10.8 E
LEMENT
The Neutral Overvoltage elements can be blocked by Binary Input Inhibit. This functionality should be checked.
Check correct indication, trip output, alarm contacts, waveform record.
When testing is complete reinstate any of the disabled functions.
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DTL P.U. Current
(sec) Volts
(
t sec onds
op
Operate Voltage
Vs
TM P.U.
(V)
(Volts)
B
LOCKING
Element
59NIT
59NDT
Operat
e Time
2x Vs
é ù
1
)
=
) M
ê ú
[ ]
-
Vn 1
ë û
Vs
D.O.
Tol
(Volts)
© 2013 Siemens Protection Devices Limited
Tolerence
Operate Time
2.x Vs x Vs
(sec) (sec)
BI Inhibits
Tol