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Measured Variable Range Typical Accuracy
Apparent power (S) V = V
N
I = 50 % to 200 % of I
N
Power factor = 1 (Unit power factor)
± 2.0 % of rated power P
rated
Where P
N
= V
N
x I
N
Reactive power (Q) V = V
N
I = 50 % to 200 % of I
N
Power factor = 1 (Zero power factor)
± 2.0 % of rated power P
rated
Where P
N
= V
N
x I
N
Active power (P) V = V
N
I = 50 % to 200 % of I
N
± 2.0 % of rated power P
rated
Where P
N
= V
N
x I
N
i
i
NOTE
The accuracies of the voltage inputs connected to a VDS device are declared at an ambient temperature (25
°C). For every 10 °C rise in temperature, the accuracies get impaired.
Measured Ground-Current Accuracy for Isolated/Resonant Connection
Measured Variable Accuracy Class Depending on IEC 61557- 12:2007-08 (K55)
I
N
setting
Setting value 0.4 A to 0.9 A 1 A to 2000 A
Measuring range 0.2 A to 15 A 1 A to 1200 A
Accuracy (for standard
ground-current ratio of 60 A
primary) ± 0.1 A for current range 0.2 A to 1 A ± 0.25 A for current range 1 A to 49 A
± 10 % for current range 1.1 A to 15 A ± 1 % for current range 50 A to 1200 A
i
i
NOTE
For grounded systems, the accuracy of the calculated ground current is 3 %.
i i
NOTE
The device parameter for ground-fault detection I
N
> ranges from 0.4 A to 2000 A. The accuracy of meas-
urements differs based on the threshold value set. When the ground-fault detection is disabled (I
N
> is 0),
the measuring range for the ground current varies from 0.2 A to 15 A.
Communications
RS485 Interface
Electrical interface
RS485
Connection type Terminal block with spring-loaded terminals
Supported communication protocol Modbus RTU
Functionality Slave
Baud rate (bps) 2400, 4800, 9600, 19200, 38400, 57600, 115200
Default value: 115 200 bps
Data format 8N1, 8E1, 8O1
Default value: 8N1
Supported address area 1 to 247
Default value: 247
Technical Data
5.1 Device Technical Data
SICAM, Feeder Condition Monitor, Manual 63
E50417-H8940-C580-A4, Edition 03.2019