3
AC/DC current transformer with energy meter functionality
SIRAX
BT7300 / BT7350
Safety instructions
The unobjectionable and hazard-free operation presupposes that the
safety instructions as well as Device Manual, electronically downloa-
dable via www.camillebauer.com, have been read and understood.
Please refer to our operating instructions for details. Downloadable
from our website www.camillebauer.com
The installation and commissioning should only be carried out by trained
personnel.
Check the following points before commissioning:
- that the connection wires are not damaged, and that they are not live during
wiring
- that the power flow direction and the phase rotation are correct
The instrument must be taken out of service if safe operation is no longer pos-
sible (e.g. visible damage). In this case, all the connections must be switched
off. The instrument must be returned to the factory or to an authorized service
dealer.
It is forbidden to open the housing and to make modifications to the instrument.
The instrument is not equipped with an integrated circuit breaker. During instal-
lation check that a labeled switch is installed and that it can easily be reached
by the operators.
The device is maintenance free. Unauthorized repair or alteration of the unit
invalidates the warranty.
Application area
The SIRAX BT7300 and BT7350 are current transformer with energy meter functionality
for monitoring 1-phase AC and DC systems up to a maximum current of 300 A AC and
400 V DC, and up to a maximum voltage of 800 V AC and 1000 V DC. The current
measurement is galvanically separated from the measured line. With the ability to
measure currents with different frequency ranges, the AC/DC current transformers are
the ideal solution for monitoring photovoltaic systems, battery charging systems, UPS
systems, variable frequency drives.
Mounting and installation
Ensure a safe working environment during assembly, installation
and maintenance work. Disconnect the power supply of the
primary conductor and secure it against unintentional reconnec-
tion.
• Mounting is via screw grooves for vertical and horizontal panel mounting or
via fastening elements for vertical and horizontal DIN rail mounting.
• The installation of the devices is arbitrary.
• Now connect the device according to the wiring diagram.
Electrical connections
Attention: Danger to life! Ensure that all leads are free of potential
when connecting them!
Please observe that the data on the type plate must be adhered to !
The national provisions have to be observed in the installation and
material selection of electric lines!
Technical data
SIRAX BT7300
SIRAX BT7350
Input
Type of measure
TRMS (monopolar) or DC
Available measurands
I
rms
; V
rms
; Watt, VAR; VA; V
pk
; I
pk
; Freq; Cosφ; THD; ΣkW; +kW/h; -kW/h;
min/max of rms measurement
Input range current
300 A AC / 400 A DC
Input range voltage
800 V AC / 1000 V DC
80 V AC / 100 V DC
Power supply
9 ... 30 V DC
Absorption
< 1.3 W
Output
Output range
RS485 (Modbus RTU)
Sampling rate
11k Samples per Second
Working frequency
DC or 1 ... 400 Hz
Accuracy
Accuracy
(@25°C up to 400Hz)
Voltage, Current, Active Power: < 0.5% F.S.
Frequency: ± 0.1 Hz
Energy: ± 1% of reading
V
peak
, I
peak
: ± 5% F.S.
Resolution
12 bit
Temperature coefficient
< 200 ppm/°C
Crest factor
1.4 (on current measurement)
Input impedence
1 MΩ ±1%
Environmental conditions
Working temperature
-15 ... +65 °C
Storage temperature
-40 ... +85 °C
Humidity
10 ... 90 % (not condensing)
Altitude
max 2000 m
Safety
Overvoltage category
CATIII up to 600 V; CATII up to 1000 V
CATIV up to 100 V
Isolation
3 kV on bare wire for Current measurement;
4 kV for Voltage measurement
Protection class
IP20
Mechanical properties
Housing material
PTB
Filling
Epoxy Resins
Flammability
UL94 V-0, self-extinguishing, non-dripping, halogen-free
Weight
370 g
DIP switch
2 pole
LED
Permanent yellow (Power ON)
Blinking yellow (communication)
Permanent yellow (Power ON)
Dimensions
89.1 x 99.25 x 28.5 mm (without terminals)
Connections
Connections
Plug-in terminals 3.5 mm, 1x4 Pole and 2x2 Pole
Cross-sectional area
1.5 mm
2
Torque
max 0.25 Nm
Standards
Adhered standards
EN61000-6-4; EN64000-6-2; EN61010-1
DIP switch settings BT7300 / BT7350
Description
1
2
All settings from EEPROM
0
0
Set Address 1 - Baud 9600
1
0
Set Address 1 - Baud 38400
1
1
Configuration via software
The SIRAX BT7300 and BT7350 can be configured via the free programming software.
This is downloadable on our homepage. The programming instructions can be found in
the corresponding operating manuals for the products.
Connection scheme BT7300 / BT7350
V
Vg
RS485
USB
LOAD
± 1000 / 100 VDC
± 800 / 80 VAC
