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Technical Data
10.9
External Direct and Remote Tripping
External Trip of the
Local Breaker
10.10 Overcurrent Protection
Operating Modes
Characteristics
High Set Stages
10-30
Operating time, total
Trip time delay
Time expiry tolerance
The set time is a pure delay time.
As emergency overcurrent protection or back-up overcurrent protection:
Emergency overcurrent protection
Back-up overcurrent protection
Definite time stages
Inverse time stage
Pickup values
Time delays
Drop-off to pick-up ratioapprox. 0.95 for I/I
Pick-up time
Drop-off time
Tolerances
The set times are pure delay times.
1
) Secondary values based on I
approx. 11 ms
0.00 s to 30.00 s, ∞
or ∞ (ineffective)
1 % of set value or 10 ms
operates on failure of the measured
voltage,
– on trip of a voltage secondary miniature
circuit breaker (via binary input)
– on detection of a fuse failure in the
voltage secondary circuit
operates independent on any events
(definite)
I
>>,3I
Ph
(IDMT)
I
, 3I
P
0P
one of the characteristics according to
Figure 10-1 to 10-3 (see Section 10.5)
can be selected
I
>> (phases) 0.10 A to 25.00 A
Ph
or ∞ (ineffective)
3I
>> (earth)
0.05 A to 25.00 A
0
or ∞ (ineffective)
T
(phases) 0.00 s to 30.00 s
IPh>
or ∞ (ineffective)
T
(earth)
0.00 s to 30.00 s
3I0>>
or ∞ (ineffective)
≥ 0.5
N
approx. 25 ms
approx. 30 ms
currents
3 % of set value or 1% nominal current
times
1 % of set value or 10 ms
= 1 A; for I
= 5 A they must be multiplied by 5.
N
N
(steps 0.01 s)
>>, I
>, 3I
>
0
Ph
0
1
)
(steps 0.01 A)
1
)
(steps 0.01 A)
(steps 0.01 s)
(steps 0.01 s)
C53000-G1176-C156
7SA6 Manual
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