Two Step Overvoltage Protection Ov2Ptov (59); Verification Of Single-Phase Voltage And Time Delay To Operate For Step 1 - ABB REQ650 Commissioning Manual

1MRK 505 293-UUS A
6.4.2
6.4.2.1
Commissioning manual

Two step overvoltage protection OV2PTOV (59)

Prepare the IED for verification of settings as outlined in
settings".
Values of the logical signals for OV2PTOV (59) are available on the local HMI under
Main menu/Tests/Function status/Voltage/OV2PTOV(59,2U>)/OV2PTOV:1. The
Signal Monitoring in PCM600 shows the same signals that are available on the local HMI.

Verification of single-phase voltage and time delay to operate for Step 1

1. Apply single-phase voltage below the set value Pickup1.
2. Slowly increase the voltage until the PU_ST1 signal appears.
3. Note the operate value and compare it with the set value.
The operate value in secondary volts is calculated according to the
following equations:
For phase-to-ground measurement:
>
Vpickup VBase VT
´ ´
VTprim
100 3
ANSIEQUATION2426 V1 EN
For phase-to-phase measurement:
>
Vpickup VT
´ ´
VBase
100 VTprim
ANSIEQUATION2427 V1 EN
4. Decrease the voltage slowly and note the reset value.
5. Set and apply about 20% higher voltage than the measured operate value for one
phase.
6. Measure the time delay for the TRST1 signal and compare it with the set value.
7. Check the inverse time delay by injecting a voltage corresponding to 1.2 ×
Vpickup>.
For example, if the inverse time curve A is selected, the trip signals
TRST1 and TRIP operate after a time corresponding to the equation:
TD 1
( )
=
t s
æ ö
V
-
1
ç ÷
>
Vpickup
è ø
ANSIEQUATION2429 V1 EN
sec
sec
Section 6
Testing functionality
5.1 "Preparing the IED to verify
(Equation 16)
(Equation 17)
(Equation 18)
77