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4.7 Defrosting Protection (depending on device version)
277
7ST6 Manual
E50417-G1176-C251-A3
4.7 Defrosting Protection (depending on device version)
Defrosting Protection
1)
The currents are specified in secondary values for I
N
= 1 A. With I
N
= 5 A, currents must be
multiplied by 5.
Definite Time Overcurrent Stages
Tolerances
4.8 Inrush Restraint (optional)
Pickup
Characteristic ID>
1)
0.10 to 2.00 I/IN (referred to I)
k: 0.00 to 0.80 Increments 0.01 I/IN
Increments 0.01
Delay time T ID> 0.00 to 30.00 s;
∞
Increments 0.01
Dropout to pickup ratio Approx. 0.88 for I/I
N
≥
0.5
Pickup time Approx. 1 cycle + 10 ms
Dropout time Approx. 1–2 cycles
Pickup value IX>>, IX> 0.10 A to 25.00 A;
∞
Increments 0.01 A
Delay time T IX>>, T IX> 0.05 s to 30.00 s or
∞
Increments 0.01 s
Dropout to pickup ratio Approx. 0.95 for I/I
N
≥
0.5
Pickup time Approx. 1 cycle + 10 ms
Dropout time Approx. 1–2 cycles
Currents 2 % of measured value (for currents
above I
N
), or 2 % of rated current
Times 3 % or 10 ms
2nd harmonics content 10 to 45 %
IMax for deactivation 0.5 to 25 A
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