Device Technical Data
Technical Data
Medium-voltage and low-voltage application range
1 kV to 36 kV
Frequency range
45 Hz to 65 Hz
Auxiliary power-supply voltage range
DC 24 V to 250 V (± 10 %)
AC 230 V (± 20 %)
Integrated back-up battery
Battery lifetime for 15 years
7
Measuring Inputs for Voltage (MLFB 6MD2321-1AA00-1AA0)
Rated voltage ph-n
AC 3.25/√3 V, AC 100/√3 V, AC 230 V
Measuring range
0.075 V to 3 V for 3.25/√3 (according to
IEC 61869-11)
3 V to 250 V for 100/√3 V
15 V to 250 V for 230 V
Internal impedance
200 kΩ
Measuring Inputs for Voltage (MLFB 6MD2322-1AA00-1AA0)
Measuring range
3 V to 50 V
Internal impedance
20 MΩ
Measuring Inputs for Current (according to IEC 60044-8, IEC 61869-10)
Rated voltage
225 mV
Internal impedance
> 20 kΩ
Measuring range phase current (225 mV@300 A
sensor)
1 A to 6000 A
Measuring range ground current (225 mV@60 A
sensor)
0.2 A to 1200 A
Thermal load capacity (current inputs)
4.5 Vrms (continuous)
Measured-Value Accuracy
Measured Variable
Accuracy Class Depending on IEC
61557-12:2007-08 (K55)
Voltage V
8
0.5 %
1 % for MLFB 6MD2322-1AA00-1AA0, for secondary
VDS voltage at 30 V
Phase current I
9
1 A or 0.5 % at rated frequency
Frequency f (47 Hz to 53 Hz/57 Hz to 63 Hz)
1 %
Energy measurement accuracy
1 % for a duration of 1 h
5.1
7
For optimum battery capacity, Siemens recommends storing the device below 30 °C; 30 % RH
8
The accuracy of voltage measurements is up to 0.5 % (±10 % of the rated voltage) for MLFB 6MD2321-1AA00-1AA0.
9
The accuracy of current measurements is up to 0.5 % (100 A to 600 A) for MLFB 6MD2321-1AA00-1AA0.
Technical Data
5.1 Device Technical Data
62
SICAM, Feeder Condition Monitor, Manual
E50417-H8940-C580-A4, Edition 03.2019