Operation Manual

20 GMC-I Messtechnik GmbH
Inputs
Voltage path Nominal voltage U
N
Input resistance R
i
50 V / 100 V / 250 V / 500 V
1M
Current path Nominal current I
N
Input resistance R
i
0.25 A / 1 A / 5 A / 25 A
8m
Voltage drop 
U
at nominal current 2.1 mV / 8.4 mV / 42 mV/ 210 mV
Internal consumption P
i
at nom. current 0.0005 VA / 0.0084 VA / 0.21 VA /5.25 VA
Electrical isolation between voltage path and current path by
optocoupler, test voltage 3.7 kV
Overload capacity
Permissible continuous overload on all nominal voltage and nominal current
ranges 1.2 times the value of the selected
nominal voltage and/or the selected nominal
current.
Exception 25 A range:
Measurement 5 min at a maximum, interval 5 min
Fuse protection The current measuring ranges are protected
by a 6 x 32 mm 25 A 500 V/1.5 kA, 250 V/
10 kA fuse.
Accuracy
Under reference conditions Class 1.5 for power measurement
Class 2.5 in all other ranges
Class 5 for power factor measurement
In the 25 A range: 2 times the basic error
(except for power factor measurement)
Reference conditions
Ambient temperature 23 C 2K
Humidity 40 ... 60% rel. humidity
Position of use horizontal
Frequency 45 Hz ... 65 Hz
Wave shape on ~: sinusoidal
Voltage
for voltage measurement:
for power factor measurement:
1)
for phase sequence indication
2)
0.8 ... 1.2 · U
N
0 ... 1.0 · U
N
> 50 V
> 30 V (dev. from each other max. 5%)