Completing The Test - ABB RET670 Commissioning Manual

Section 10
Testing functionality by secondary injection
t s
( )
IECEQUATION2429 V1 EN-US
( )
t s
ANSIEQUATION2429 V1 EN-US
where:
t(s)
TD1
V
Vpickup> Set pickup voltage for step 1
For example, if the measured voltage jumps from 0 to 1.2 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.
8. Repeat the test for Step 2 of the function.
10.6.3.2

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.
10.6.4 Overexcitation protection OEXPVPH (24)
Prepare the IED for verification of settings outlined in section "Requirements" and
section "Preparing for test" in this chapter.
10.6.4.1
Verifying the settings
1. Enable function.
2. Connect a symmetrical three-phase voltage input from the test set to the appropriate
connection terminals of the overexcitation protection OEXPVPH (24) is configured for a
three-phase voltage input.
A single-phase injection voltage is applied if the function is configured for a phase-to-phase
voltage input.
OEXPVPH (24) is conveniently tested using rated frequency for the injection voltage and
increasing the injection voltage to get the desired overexcitation level.
3. Connect the alarm contact to the timer and set the time delay
4. Increase the voltage and note the operate value
5. Reduce the voltage slowly and note the reset value.
6. Set the alarm time delay to the correct value according to the setting plan and check the time
delay, injecting a voltage corresponding to 1.2 ·
170
k 1
=
U
 
1
−
 
U 1
>
 
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
TestMode setting to Disabled .
tAlarm temporarily to zero.
Pickup1 .
Pickup1 .
1MRK 504 154-UUS B
(Equation 101)
(Equation 102)
SEMOD54358-38 v4
M6583-45 v5
M6583-49 v4
Commissioning manual