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how to use freja 300 for testing delta directional comparison

how to use freja 300 for testing delta directional comparison

how to use freja 300 for testing delta directional comparison

(OP)
hi guys!

this is my second time posting a question. I was very thankful because my first thread(question) was entertained and answered by several members in this great forum.

this is my question:
how to use freja 300 for testing delta directional comparison which is one feature of micom P443 distance relay?

the following is an excerpt from the P443 manual(commissioning section):

6.2.5.3 Forward fault preparation
Configure the test set to inject a dynamic sequence of injection, as follows:

− Step 1: Simulate a healthy three-phase set of balanced    voltages, each of magnitude Vn. No load current should be simulated. The duration of injection should be set to 1 second. Step 1 thus mimics a healthy unloaded line, prior to the application of a fault

− Step 2: Simulate a forward fault on the A-phase. The A-phase voltage must be
simulated to drop by 3 times the [3313: ΔV Fwd] setting, i.e:

Va = Vn - 3 x ΔV Fwd

The fault current on the A-phase should be set to 3 times the [3315: ΔI Fwd] setting, lagging Va by a phase angle equal to the line angle, i.e:

Ia = 3 x ΔI Fwd ∠-θ Line

Phases B and C should retain their healthy prefault voltage, and no current. The duration of injection should be set to 100ms longer than the Delta Dly time setting.

6.2.6 Delta directional comparison operation and contact assignment

A forward fault will be injected as described above, with the intention to cause a scheme trip.
As in the table, for a Permissive scheme the Signal Receive opto input will need to be ON(energized).

6.2.6.1 Phase A
Prepare a dynamic A phase to neutral fault, as detailed above. Ensure that the test set is simulating Steps 1 and 2 as one continuous transition. Connect a timer to start when the fault injection (Step 2) is applied, and to stop when the trip occurs.

now, my problem is how to set up the freja 300 to satisfy the last paragraph above (6.2.6.1) Phase A? I was thinking of using the 3rd page(sequence page) of the "general" function. Should I use the BO output to start the timer?Am i right or wrong?

please, can someone here tell me the right set up. I've never tried testing a distance relay. I was just reading the MICOM P443 manual.Please help!!!

 

RE: how to use freja 300 for testing delta directional comparison

you can use the sequencer.  no need to use BO, the sequencer should be able to time.

For more complex sequences, you may need FrejaWin SW

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