ABB REQ650 Commissioning Manual

6.4.2 Two step overvoltage protection OV2PTOV (59)
Prepare the IED for verification of settings as outlined in
5.1 "Preparing the IED to verify
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.
6.4.2.1 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:
sec
100
3
Vpickup VBase VT
VTprim
>
´ ´
ANSIEQUATION2426 V1 EN (Equation 16)
For phase-to-phase measurement:
sec
100
Vpickup VT
VBase
VTprim
>
´ ´
ANSIEQUATION2427 V1 EN (Equation 17)
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:
( )
1
1
TD
t s
V
Vpickup
=
æ ö
-
ç ÷
>
è ø
ANSIEQUATION2429 V1 EN (Equation 18)
1MRK 505 293-UUS A Section 6
Testing functionality
77
Commissioning manual

ABB REQ650 Specifications

General

Brand	ABB
Model	REQ650
Category	Protection Device
Language	English