CHAPTER 10: COMMISSIONING 10.15 OVERVOLTAGE ELEMENTS (59P, 59X, 59NH, 59NL, 47)
GEK-106310-AF F650 DIGITAL BAY CONTROLLER 10-19
10.15.3 59NH and 59NL elements
Set the relay as follows
Apply voltage as indicated on the table under the overvoltage setting level and verify that the relay does not trip.
Verify that the relay trips for the set voltage (with an admissible error of 5%).
This element can also be tested by applying only phase voltages. For this purpose, it is necessary to set Auxiliary Voltage =
VX. In this condition, Vn voltage is calculated as a sum of the phase voltages.
10.15.4 47 element - Neg Seq OV
Set the relay as follows:
Apply voltage as indicated on the table under the overvoltage setting level and verify that the relay does not trip.
Verify that the relay trips for the set voltage (with an admissible error of 5%).
GENERAL SETTINGS
Auxiliary Voltage VN
NEUTRAL OV HIGH/LOW (59NH/59NL)
Function ENABLED
Pickup Level 120 V
Trip Delay 2.00
Reset Delay 0.00
Elements Input Pickup Level
(volts)
Trip Delay
(seconds)
Applied Voltage (V) Tripping time (s)
EXPECTED Admissible
59NH/59NL VX 120 2 114 NO TRIP NA
132 2 [1.9–2.1 ]
132 2 [1.9 – 2.1]
NEG SEQ OV (47)
Function ENABLED
Pickup Level 50 V
Trip Delay 2.00
Reset Delay 0.00
CHANNEL Applied Voltage (V) Angle Tripping time (s)
EXPECTED Admissible
VI 65 0º NO TRIP NA
VII 65 120º
VIII 65 240º
VI 55 0º 2 [1.9–2.1]
VII 55 240º
VIII 55 120º
VI 45 0º NO TRIP NA
VII 45 240º
VIII 45 120º
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