ABB REL300 Instruction Manual page 144

I.L. 40-385.7
Z1P
Z2P
Z3P
PANG
Z1GR
a. Single-Phase-to-Ground Fault
Use the equation in Step 10, and the following input voltages:
The single-phase trip currents for Zone 1, Zone 2, and Zone 3 at the maximum torque angle
∠
I
A
b. Phase-to-Phase Fault
Use the T-connection and the equation in step 13. Apply the following input voltages:
V
AN
V
BN
V
CN
The single-phase trip currents for Zone 1, Zone 2 and Zone 3 at the maximum torque angle
(
I
AB
c. Three-Phase Fault
Use the equation in Step 12 with the following input voltages:
V
V
V
CN
The three-phase trip currents for Zone 1, Zone 2 and Zone 3 at the maximum torque angles
(
I
should be 6.0A, 4.5A and 3.0A, respectively.
1.1.1.8 Instantaneous Overcurrent (High-Set Trip)
Step 20.
A-10
= ZIGF =
= Z2GF =
= Z3GF =
= GANG =
= Z2GR = Z3GR
∠
V = 45 0° = V
AN LN
∠
V = 70 – 120°
BN
∠
V = 70 120°
CN
– ( )° )
are 6.0A, 4.5A and 3.0A, respectively.
75
1
∠
= 18 0° = -- - V
F
2
1
∠
= 18 – 180° = -- - V
F
2
∠
= 105 90
∠ )
are 4A, 3A and 2A, respectively.
– 75°
∠
= 27 0° = V
AN L
∠
= 27 – 120°
BN
∠
= 27 120°
∠ ∠ ∠
– 75°, I – 195°, I
A B C
Using the SETTINGS mode, change the following settings:
4.5 T1
6.0 T2P
9.0 T3P
75 ο
ZR
= 0.01
)
+45°
= 0
= T2G = 0.2
= T3G = 0.3
= 3