Seneca S203TA Manual

EN
S203TA Advanced Three-phase Network Analyzer
General Description
Model S203TA is a complete three-phase network analyzer suited for u s e w i t h u p t o
600Vac voltage range, and current range given by the nominal range of the CTs with 5A
Output connected.
The instrument provides all the following electrical measurable quantities: Vrms, Irms,
Watt, Var, Va, Frequency, Cos
(except frequency) are available both single-phase and three-phase.
Measurements are read through serial communication both in floating point and
normalised format (except Frequency and Active Energy).
The DIP-switches can be set for the analog retransmission of any Vrms, Irms, Watt and
Cos quantity either single phase or three-phase, or any phase chosen (by specific 
MODBUS registry). The module is also distinguished by:
 Communication configurability through DIP-switch or software.
 RS485 serial communication with MODBUS-RTU protocol, maximum 32 nodes.
 Easy-wiring of power supply and serial bus by means of the bus housed in the DIN rail.
 High precision: 0,2 % class.
 Protection against ESD discharge up to 4 kV.
 Power input insulation: 3750 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.
 Possibility for connection and management by external CTs with 5A output.
 All kind of insertion possible: single phase, three or four wires (three-phase with 3 CTs).
 Possibility to compensate errors caused by frequency change in places where network
frequency is not stable (frequency changes > 30 mHz).
Technical Specifications
Power Supply :
Consumption :
Communication Ports:
Protocol :
Input
Voltage Input
Current Input :
Class/Base Precision :
Max Resistance of each CT's
secondary wire :
(1): Precisions are given in the following range:
 and
10 - 40 Vdc o 19 - 28 Vac (50 - 60 Hz).
max 2,5 W.
Rs485, 1200 - 115200 Baud.
MODBUS-RTU.
Up to 600 Vac, Frequency: 50 o 60 Hz.
Rated range :given by I
Max Crest Factor :3.
Maximum Current :3*I
Network Frequency: 50 or 60 Hz.
Voltmeter : 0,2 %.
(1)
Amperometer : 0,2 %.
Wattmeter : 0,2 %.
The sum of the resistance of the wire going (from CT to
load) and back (from load to CT) < rated burden
MI001458-E
Active Energy . All measurements given above
Vrms: 40..600 Vac
Irms : 0,4-100% Iprimary of TA
of CT.
NOMINAL
of CT.
NOMINAL
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