ABB REL300 Instruction Manual page 147

• +165° (± 87°)
• -108°
For a Negative Sequence Directional Unit (DIRU = NSEQ), the tripping direction of REL300 is:
I leads V
2
• +3°
• -82° (± 85°)
• -167°
The relay should not trip at the angles of:
• +13°
• +98° (± 85°)
• +183°
Step 25.
NOTE: In order to eliminate the voltage polarizing effect, make sure the voltages are finely bal-
anced so that 3V0 is less than 1.0 volt.
The relay should trip at the following angles:
• -3°
• -90 o ( ±87°)
• -177°
The relay should not trip at the following angles:
• +3°
• +90° ( ±87°)
• +177°
1.1.1.10 CIF, STUB, IOM, IL and LV Tests
Step 26.
by a value between +8° and +188°. The relay should trip at the following angles:
2
For a dual polarizing ground directional unit (DIRU = DUAL) test, connect the test
circuit shown in Figure H-4; apply Lp 1.0A
apply a balanced 3-phase voltage (70V) to Va, Vb, Vc, and Vn. Apply Ia = 4A to
terminals 6(+) and 5(-).
Set the relay per Table A-1. Change the following settings: IOM = 3, IL = 2, CIF =
CF, and connect a rated dc voltage to 52b, between TB5/3 (+) and TB5/4 (-). Apply
an AG fault as shown in Step 10 (Figure B-1). The relay should trip at I
with CIF target. Change IL setting from 2 to 3.5A and repeat the test shown in Step
26. The relay should trip at I
= CFT and Ia = 3.2A. Repeat the test. The relay should trip with a display of CIF
and a time delay of 200 ms. Refer to Section 3.4.7 (page 3-8), (Close-Into-Fault
∠
to terminals 12 (+) and 11(-), and
– 90°
= 3A (IOM) with CIF target. Change the setting CIF
a
I.L. 40-385.7
= 2A (IL)
a
A-13