CIRCUTOR CIRWATT-B410T Series - Manual (Page 9)

THREE PHASE STANDARD CIRWATT B METER
CIRWATT B THREE PHASE INSTRUCTION MANUAL 9 / 53
(1) Option only available for direct meters with three phase internal relay.
Example: The code 410UD1A90B10 represents a Type B Standard meter, Class B for active energy (Class 1) and Class 2 for reactive
energy, with asymmetric connection, 50Hz, 4 quadrants; with supply/ voltage between 3 x 127(230)V and 3 x 230(400)V and 10(100) A , with
RS232 and RS485 communications; without expansion module or extra features.
1.3.- Metrology
The metrological characteristics for the Cirwatt Three-Phase Type B (TBT) are:
The current sensor is of the current transformer type.
Current ranges:
Active Class B (1)
Indirect / semi-indirect connection version
I
tr
0,250
I
st
0,010
I
min
0,050
I
n
/ I
ref
5,000
I
max
10,000
Direct connection version
I
tr
1,000
I
st
0,040
I
min
0,500
I
n
/ I
ref
10,000
I
max
100,000
1.4.- Measured magnitudes
The meter is able to measure the following variables:
Imported and exported active and reactive energy in the four quadrants.
Active and Reactive Power.
Instantaneous current and voltage.
Cos .
1.5.- Nominal, maximum and minimum operating conditions
1.5.1.- Electrical parameters
Reference voltage (U
ref
): 3x57/100V to 3x230/400V (depending on version)
Operating voltages
o minimum: 80% U
ref
o maximum: 120% U
ref