Woodward
Technical Manual WIC1
28
DOK-TD-WIC1E, Rev. L
5.7 Technical Data
5.7.1 Common Data
Frequency:
45 Hz to 65 Hz
Nominal:
50/60 Hz
Thermal load capacity:
Permanently: 2.5 x highest rated CT current
1s
25 kA CT primary current
3s
20 kA CT primary current
Dynamic load capacity:
62.5 kA CT primary current
Disengaging ratio:
95% of the pickup value
5.7.2 Environmental Conditions
Temperature range when stored:
-40°C to +85°C
Temperature range when in operation: -40°C to +85°C
Max. altitude for operation:
2000 m (above sea-level)
5.7.3 Accuracy
Tripping times:
DMT: ±1% of the setting value absolutely ±10 ms
IMT:
dependent on the current level and chosen
characteristic, absolutely ±10 ms
Earth fault element*:
≤ 5% of the setting value in the range of IE> x IS
≤ 5% of the IS in the range of IE> x IS
*=Option, only available in device types that offer earth current protection.
Measuring accuracy for phase current at 0°C to +50°C
with CT
WE1, WE2, W3, W4, W5 or W6
:
I
Ph
> Is:
≤ 5% of I
Ph
with CT W1:
7.
2 A ≤ I
Ph
< 10 A:
≤ 12.5% of I
Ph
10 A ≤ I
Ph
< 14.4 A:
≤ 7.5% of I
Ph
I
Ph
≥ 14.4 A:
≤ 5% of I
Ph
with CT W2:
14.
4 A ≤ I
Ph
< 20 A:
≤ 12.5% of I
Ph
20 A ≤ I
Ph
< 28,8 A:
≤ 7.5% of I
Ph
I
Ph
≥ 28.8 A:
≤ 5% of I
Ph
Measuring accuracy for phase current at -40°C to +85°C
Additional temperature influence:
≤ 2.5 % of I
Ph
Measuring accuracy for earth current
≤ 2x Accuracy of phase current
CT Type
Applying Accuracy Measuring Range
WIC1
WE1
AS1
7.2
– 288** A
WIC1
WE2
AS1 14.4
– 1152 A
WIC1
W2
AS1
14.4
– 1152 A
WIC1
W3
AS1
28.8
– 2304 A
WIC1
W4
AS1
57.6
– 4608 A
WIC1
W5
AS1
115.2
– 9216 A
WIC1
W6
AS1
230.4
– 18432 A
