FREGA TEST PROCEDURE FOR DISTANCE RELAYOHMEGA RELAY

1. SELECT FREGA ICON

2. CLICK CONNECT THEN SELECT DISTANCE ICON

1 / 12

3. FILL IFOMATION AND SELECT PROCED

4. WAITING SOME TIME UP TO LOADING

2 / 12

5. SELECT CONFIG

6. SELECT FILE THEN NEW TEST WILL SET PREFAULT, MAX FAULT, ZONE TIME (3ZONES) AND CONFIG CONTACT ALSO CAN SELECT COLOUR

3 / 12

7. SELECT RX RAMP

8. FROM FILE MENU SELECT NEW TEST THEN (IMPORT A REFERNCE GRAPH)

4 / 12

9. TO CREATE GRAPH SELECT EDIT / CREATE A REFERANCE GRAPH

5 / 12

10. Should be select circle or other chart according final setting, radius, angle, a and b(will come auto when a value enter) Then click save element , create zone this will give you the next zone after finish

6 / 12

click file menu , save as , enter the name for your graph , click file menu then exit

Important information about graph building: In case of phase – phase graph building Take the radius = zone setting value /2 and the angle equal line angle In case of phase – ground graph building

Take the radius = zone setting value(1+K0) / 2 and the angle equal comp. Angle , K0= 1/3{(Z0/Z1)-1} REF. OHMEGA MANUAL - Chapter 2 -sheet (4,5)

Must be Ke value and angle equal zero in configuration

7 / 12

8 / 12

Example for 132/33 kv s/s 8903 hail al_khotta line M08Setting from protection engineering division – central : 1- For testing Z1 By FREJA Tester

line angle 65EF comp. Z0/Z1 ratio 2.79ZF comp. Angle 75Z1 PF impedance 7.52Z1 EF impedance 7.52

In freja software - graph building:For ph – ph Radius = Z1/2 = 7.52 / 2 = 3.76

radius 3.76 Angle 65a 0 b 7.52

For ph – EK0= 1/3{(Z0/Z1)-1} = 1/3(2.79 – 1) = 0.6 Radius = Z1*(1+k0)/2 =6.016

radius 6.016 Angle 75a 0 b 12.032

9 / 12

2- For testing Z2 by FREJA TesterSetting from protection engineering division – central:

line angle 65EF comp. Z0/Z1 ratio 2.79ZF comp. Angle 75Z2 PF impedance 11.1Z2 EF impedance 11.1

In freja software - graph building:For ph – ph Radius = Z2/2 = 11.1/ 2 = 5.55

radius 5.55 Angle 65a 0 b 11.1

For ph – EK0= 1/3{(Z0/Z1)-1} = 1/3(2.79 – 1) = 0.6 Radius = Z2*(1+k0)/2 = 8.88

radius 8.88 Angle 75a 0 b 17.76

3- For testing Z3 by FREJA TesterSetting from protection engineering division – central:

line angle 65EF comp. Z0/Z1 ratio 2.79ZF comp. Angle 75Z3 type Offset MHOZ3 PF impedance (FWD) 22.2Z3 PF impedance (Rev) 2.21Z3 EF impedance (FWD) 22.2Z3 EF impedance (Rev) 2.21

In freja software - graph building:For ph – ph Radius ={ Z3 (FWD) +Z3(Rev) } / 2 = (22.2 +2.21) / 2 = 12.205

radius 12.205 Angle 65a 2.21 b 22.2

For ph – EK0= 1/3{(Z0/Z1)-1} = 1/3(2.79 – 1) = 0.65 Radius = {Z3 (FWD) +Z3(Rev)} * (1+K0) / 2 = 19.528 a= Z3 EF (Rev) (1+k0)=3.536 , b = Z3 EF (FWD) (1+k0)= = 35.52

radius 19.528 Angle 75a 3.536 b 35.52

11. Adjust start, stop & step for your wanted No. of RAMP’S Then START

10 / 12

Time reach In configuration screen adjust zone time tz1=0 , tz2=800msec. , tz3= 1.5 sec.

11 / 12

Go to Zt screenImport your graph or you can make new graph like the zone reach graph

After finish ---- file – save as , file exit Select the phases and Click start after finish click report then print

12 / 12

Eng. Mohammed Deraz ThyssenKrupp Co.

13 / 12