Siemens Argus 7SR21 Technical Manual page 570

7SR210 & 7SR220 Commissioning & Maintenance Guide
If the 81-n Delay setting is long it will be advantageous to map the function 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. If the delay setting is short the operation of the element can be easily checked directly.
The frequency should then be gradually decreased/increased until the element resets. The reset frequency can
be used to check the Hysteresis setting.
If the element is set as 81-n U/V Guarded, The applied voltage must be above the 81 UV Guard Setting in the
U/O Frequency menu.
Apply setting frequency +0.5 Hz for Over-frequency or -0.5 Hz for Under-frequency and record operating time.
Starting with the element in the operated condition, gradually increase or decrease the applied voltage until the
element resets. Measure the reset voltage level to check the 81 Hysteresis setting.
F U/O DTL
(Hertz) (sec)
If the element is set as 81-nU/V Guarded, this setting can be tested by applying the test voltage at a level below
the 81 U/V Guard Setting at a frequency in the operate range. Increase the voltage until the relay operates.
UVG UVG Freq element
Setting Used for test
(Volts)
U/O
Freq
1.1.1.1 E B
LEMENT
The U/O Frequency 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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Hyst. D.O. P.U.
(calc.) Freq
Hertz
Blocked
Volts (D.O.)
LOCKING
Element
81-1
81-2
81-3
81-4
81-5
81-6
D.O. Operate
Freq. Time
Hertz +/- 0.5Hz
Unblocked
Volts (P.U.)
© 2013 Siemens Protection Devices Limited
UV NOTES
Guard
NOTES
BI Inhibits