Note that these elements may be set as directional. If this is the case, the phase angle of the current must be
set with respect to the voltage to produce operation of the elements.
Voltage Setting (V, p-p) Measured (V, p-p)
I Setting Multiplier Calculated PU Measured Tolerance
51-1 Pickup
51-2 Pickup
51-3 Pickup
51-4 Pickup
Element Blocking
The Voltage Controlled Overcurrent function can be set to Inhibit for VT Supervision operation.
This functionality should be checked. Apply balanced voltage and current. Reduce a-phase voltage to cause a
VTS condition. Increase 3P current until the element operates at its full setting, i.e. 51V settings are not used.
Element VTS Action
51-1
51-2
51-3
51-4
Check correct indication, trip output, alarm contacts.
55 Power Factor
Apply balanced 3 phase rated voltage and current. Increase current phase angle until the LED assigned to ’55-
n’ is on. Record this angle in the table below. Decrease the angle until the LED resets. Record the angle.
55 Setting
Angle Pick-Up Drop-Off
55-1
55-2
If the element is set with 55-n UC Guard Enabled, the setting can be tested by applying the test current
at a level below the 55-n U/C Guard Setting at a power in the operate range. Increase the current until
the relay operates.
UCG
UCG Setting (⋅
I
rated
)
Power Element
Used for Test
Blocked Current
(D.O.)
Unblocked
Current (P.U.)
Notes
Power Factor
Element Blocking
The Power Factor elements can be blocked by Binary Input Inhibit. This functionality should be
checked.
Element
BI Inhibits
55-1
55-2
Check correct indication, trip output, alarm contacts, waveform record.
When testing is complete reinstate any of the disabled functions.
9.9.19
Functional Tests
9.9 Protection Functional Tests
488 Reyrolle 7SR5, Overcurrent Protection Device, Device Manual
C53000-G7040-C014-1, Edition 11.2019
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