Completing The Test - ABB RET670 Commissioning Manual

Section 10
Testing functionality by secondary injection
( )
t s
ANSIEQUATION2428 V1 EN-US
where:
t(s)
TD1
V
Vpickup< Set pickup voltage for step 1
For example, if the measured voltage jumps from the rated value to 0.8 times the set pickup
voltage level and time multiplier TD1 is set to 0.05 s (default value), then the TRST1 and TRIP
signals trip at a time equal to 0.250 s ± tolerance.
10. The test above can be repeated to check the inverse time characteristic at different voltage
levels.
11. Repeat the above-described steps for Step 2 of the function.
Extended testing
The tests above can be repeated for
10.6.1.2

Completing the test

Continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
10.6.2 Two step overvoltage protection OV2PTOV (59)
Prepare the IED for verification of settings as outlined in section
section "Preparing for test"
10.6.2.1 Verifying the settings
Verification of single-phase voltage and time delay to trip for Step 1
1. Apply single-phase voltage below the set value
2. Slowly increase the voltage until the PU_ST1 signal appears.
3. Note the trip value and compare it with the set value
For phase-to-ground measurement:
168
TD 1
=
æ ö
V
-
1
ç ÷
<
Vpickup
è ø
Trip time in seconds
Settable time multiplier of the function for step 1
Measured voltage
in this chapter.
The trip value in secondary volts is calculated according to the following
equations:
2 out of 3 and for 3 out of 3 operation mode.
Pickup1 .
Pickup1 .
1MRK 504 154-UUS B
(Equation 98)
TestMode setting to Disabled .
"Requirements" and
Commissioning manual
M13796-35 v8
M13796-25 v5
M13806-2 v6
M13806-9 v2
M13806-50 v8