USER MANUAL – S203TA-D / S203RC-D
8
1.
Introduction
Models S203TA-D and S203RC-D are a complete three-phase energy analyzers with display, suited for use
with up to 600Vac voltage range (without a TV transformer), and max current equal to 5A (without a TA
transformer) connected to the inputs. A double serial interface (USB or RS485) it’s also available (Modbus
RTU protocol).
Analog and digital outputs can be connected to the electrical measure.
1.1.
Features
Energy values backup (FeRAM backup values without battery need)
Last screen page displayed backup (FeRAM backup without battery need)
Easy configurable by free configuration software or by display menu
RS485 serial communication with MODBUS-RTU protocol, maximum 32 nodes.
USB serial communication with Modbus RTU protocol for registers access and configuration
High precision: 0,2%class (S203TA-D).
Protection against ESD discharge up to 4 kV.
Measure input insulation: 4000 Vac towards all the other circuits.
Insulation between communication and power supply: 1500Vac.
Insulation between retransmitted output and power supply: 1500Vac.
Analog output signal settable in voltage or current.
Digital output pulse signal for Energy or Energy sign.
Possibility for connection and management by external CTs with 5A output.
Possibility for connection and management by external VTs.
All kind of insertion possible: single phase, Aron, 4-wires, 3-wires .
Possibility to compensate errors caused by frequency change in places where network frequency is
not stable (frequency changes > 30 mHz).
USB Firmware update
Easy-wiring of power supply and serial bus by means of the bus housed in the DIN rail.
S203RC-D can be used with rogowski coil with full scale of +-50mV,+-100mV or +-200 mV
1.2.
Electrical Measure on Display
The instruments provide all the following electrical measurable quantities by the display:
V RMS (phase A to neutral)
V RMS (phase B to neutral)
V RMS (phase C to neutral)
V RMS 3-phase
I RMS phase A
I RMS phase B
I RMS phase C
I RMS 3-phase
P ACTIVE phase A
P ACTIVE phase B
P ACTIVE phase C
P ACTIVE 3-phase
Q reactive phase A
Q reactive phase B
Q reactive phase C
Q reactive 3-phase
S apparent phase A
S apparent phase B