Woodward MRI3-ITE, Manual

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Woodward Manual MRI3-ITER GB
50 DOK-TD-MRI3 ITERE Rev.A
7.3.4 Earth fault protection
Setting range Step Tolerance
I
E>
0.01...2.0 x I
N
(EXIT) (E)
0.01...0.45 x I
N
(EXIT)
(ER)
0.001 (0.01...0.05)
0.002 (0.05...0.1)
0.005 (0.1...0.2)
0.01 (0.2...0.5)
0.02 (0.5...1.0)
0.05 (1.0...2.0)

3% from set value
or

0.3% I
N
t
IE>
0.04 - 260 s (EXIT) (E)
0.06...260 s (EXIT) (ER)
(definite time)
0.05 - 20 (EXIT)
(inverse time) 0.02 (0.04...1.0)
0.05 (1.0...2.0)
0.1 (2.0...5.0)
0.2 (5.0...8.5)
0.5 (8.5...10.0)
1.0 (10...20)
2.0 (20...50)
5.0 (50...100)
10.0 (100...260)
0.01
(0.05...0.5)
0.02 (0.5...1.0)
0.05 (1.0...2.0)
0.1 (2.0...5.0)
0.2 (5.0...10.0)
0.5 (10.0...20.0)

3% or

20 ms

5% for NINV
and VINV

7.5% for NINV
and EINV
I
E>>
0.01...2.0 x I
N
(EXIT) (E)
0.01...0.45 x I
N
(EXIT)
(ER)
0.001 (0.01...0.05)
0.002 (0.05...0.1)
0.005 (0.1...0.2)
0.01 (0.2...0.5)
0.02 (0.5...1.0)
0.05 (1.0...2.0)

3% from set value
t
IE>>
0.04...10 s (EXIT) 0.02 (0.04...0.5)
0.05. (0.5...2.0)
0.1 (2.0...5.0)
0.2 (5.0...10)

3% or

20 ms
RS 1...32
Table 7.4: Setting ranges and steps
Setting ranges for k:
Cable protection:
k = 1...5
Transformer- and generator stator: k = 0.5...1.5
7.3.5 Earth fault protection (ER-Type)
Setting range Step Tolerance
U
E>
U
N
= 100 V:
3 PHA/e-n: 1 - 70 V
1:1: 1- 120 V
U
N
= 230 V:
3 PHA/e-n: 2 - 160 V
1:1: 2 - 300 V
U
N
= 400 V:
3 PHA/e-n: 5 - 300 V
1:1: 5 - 500 V
1 V
1 V
2 V
2 V
5 V
5 V 
5% from set value or <0.5% U
N