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7. 4 Measured voltage
The device has 3 voltage measurement in-
puts (V1 to V3) on the back of the device.
7. 4. 1 Overvoltage
The voltage measurement inputs are suit-
able for measurement in networks in which
overvoltage of category 600 V CAT III (voltage
measurement surge of 6 kV) may occur.
7. 4. 2 Frequency
The device:
• requires the network frequency to measure
and calculate the measurement values.
• is suitable for measurement in networks
in which the fundamental oscillation of the
voltage is within the range of 45 to 65 Hz.
The network frequency is derived from the
measured voltage in phase L1. The sampling
rate of the voltage and current measurement
inputs is derived from the network frequency.
If the measurements have severely distort-
ed voltages, it will no longer be possible to
precisely determine the frequency of the
fundamental oscillation of the voltage. I.e. the
corresponding network frequency should be
stipulated for measured voltages that exhibit
severe distortions.
(Voltage distortions occur e.g. in measure-
ments of consumers operated with a phase
angle control). Current distortions do not
affect the determination of the frequency.
More information can be found in Section 12
Configuration / Rated frequency "
Overcurrent protective device for the
line protection of the supply voltage
Recommendation for the overcurrent pro-
tective device for the line protection of the
supply voltage, depending on the variants:
• Option 230 V:
6 - 16 A (Char. B)
• Option 24 V:
1 - 6 A (Char. B)
C
ATTENTION!
The circuit breaker serves only as
line protection - it does not provide
protection for the device!
Recommendation for the maximum number
of devices on one miniature circuit breaker,
depending on the variants:
• Option 230 V:
For one miniature circuit breaker B6A,
maximum of 4 devices.
For one miniature circuit breaker B16A,
maximum of 11 devices.
• Option 24 V:
For one miniature circuit breaker B6A,
maximum of 3 devices.
For one miniature circuit breaker B16A,
maximum of 9 devices.