Description Value
Non-directional earth-
fault detection
Operating range 4...200 A (isolated/compensated network)
200...1000 A (solidly grounded/low-impedance
network)
Accuracy
Depending on the nominal frequency of the
current measured: f
n
±10% of the set value in the range of 4...25 A
±1.5% of the set value in the range of >25...1000 A
Operate time: ±1.0% of the set value or ±20 ms
(Current measurement based on internal
calculation)
Directional earth-fault
detection
Operating range 4...200 A (isolated/compensated network)
200...1000 A (solidly grounded/low-impedance
network)
Accuracy
Depending on the nominal frequency of the
current measured: f
n
Current:
• ±10% of the set value in the range of 4...25 A
• ±1.5% of the set value in the range of
>25...1000 A
Voltage: ±1.5% of the set value
Phase angle: ±3⁰
Operate time: ±1.0% of the set value or ±20 ms
(Current measurement based on internal
calculation)
Fuse failure protection Operating range 4...1000 A (Negative-sequence current level)
300...10000 V (Negative-sequence voltage level)
Accuracy Depending on the nominal frequency of the
current measured: f
n
NPS function:
<36 ms for U
Fault
= 1.1 × set value
<22 ms for U
Fault
= 5 × set value
Delta function:
<34 ms for ΔU = 1.1 × set value
<28 ms for ΔU = 5 × set value
Three-phase inrush
detector
Operating range 5…100% Ratio I2f/I1f measurement
Accuracy Depending on the nominal frequency of the
current measured: f
n
Current:
±1.5% of the set value or ±0.02 A
Ratio I2f/I1f measurement:
±5.0% of the set value
Operate time: ±35 ms
Table continues on next page
1MRS757488 H Section 10
Technical data
RIO600 289
Installation and Commissioning Manual
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