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DEC-3 (Àå±â Àç°í)

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Real value 7-digit energy counter. 4 functions on a single transducer
DEC-3
Three-phase digital energy counter (with pulse output)

   

Programmable microprocessor- based digital energy counter offering outstanding measurement accuracy and reliability, suitable for operation in harsh environments and fully compliant with international standards.

GENERAL SPECIFICATIONS
   

DIP-SWITCH OR SOFTWARE
PROGRAMMABLE: 4 SELECTABLE READINGS
(P, S, Qind, Qcap).
HIGH ACCURACY.
¡Ü Real value 7-digit energy counter.
¡Ü 4 functions on a single transducer
   P    =   Active energy
   S    =   Apparent energy
   Qind =   Lagging reactive energy
   Qcap =  Leading reactive energy.
¡Ü For unbalanced three-phase electrical systems.
¡Ü For 3-wire and 4-wire electrical systems.
¡Ü User selectable primary and secondary CT ratings.
¡Ü Advanced PC programming with ELEXTOOL soft-ware.
¡Ü Pulse output.
¡Ü Digital operation for high measurement stability.
¡Ü Galvanic isolation on inputs and outputs.
¡Ü Automatic scale change and overload protection on inputs.
¡Ü High immunity to external interference.
Patented microprocessor-based digital ana-lyser of outstanding accuracy and versatility. Readings are RMS measured by a digital circuit ensuring maximum accuracy, reliability and stability over time.
The automatic scale change for voltage and current ensusres the highest accuracy in the range 20 mA to 6 A and 20 Vac to 750 Vac.
Current and voltage autoranging also provides a dynamic range of 500 on power, while automatic amplifier offset correction prevents accuracy drifting Vs. temperature and over time. The unit may be programmed by external PC-run software (ELEXTOOL) or DIP-SWITCHES to 4 distinct output parameters. The value(weight) of each pulse and CT or VT ratings are also user-program-mable. All user-configured settings are handled by the unit internal 32-bit floating-point mathematics ensuring maximum accurancy and best performance. Each pulse generated subtracts its relative value from an internal sub-counter. In this way pulse fractions are not rounded off but accumulated to form whole pulse, thereby ensuring maximum accuracy.
Testing and Calibration are performed using an automated digital calibration system. Each instrument is delivered with a certificate of conformity and calibration.
All the inputs and outputs are galvanically isolated to guarantee complete operation safety in any type of installation and designed for highest immunity to external disturbance.


     PULSE OUTPUT

Pulse output with galvanic isolation via opto-mos solid state relay rated at 250 Vac/dc, 100 mA.
The duration of the output pulse ranges between 400 and 500 mSec. Pulse frac-tions are accumulated in an internal counter and supplied to the output as a pulse each time the counter accumulates a whole pulse.



     LOCAL PROGRAMMING

 
 

     ELEXTOOL PROGRAMMING

An advanced, though easy, programming of the counter can be achieved with the ELEXTOOL software package and the cable supplied with, providing following configuration possibilities.
Current:
Current transformer (free setting).
Voltage:
Low voltage for direct connection and high voltage for connection via voltage transformer, with programming of transformer ratio.
Output reading:
Selectable from:
P =Active Energy
Qind =Lagging Reactive Energy
Qcap =Leading Reactive Energy
S =Apparent Energy
Co-generation:
The counter automatically reverts the current input direction if, during installation, wiring is incorrent.
This programming option enables the instrument to detect the energy flow direction; pulses are only generated for used energy. To ensure correct operation of this feature, the wiring instructions shall be scrupulously followed.
Output pulse:
The pulse value may be programmed to the resolution required.
If the limit corresponding to a pulse fre-quency of 2600 pulses/hour is exceeded, the program signals the error and suggests the correct value.
Measurement display:
The real primary readings (V, I, P) mea-sured by the counter may be displayed in numerical form on PC for inspection of system operation and installation.

     TECHNICAL SPECIFICATIONS

Inputs:
Voltage:
500 V, 20 to 800 Hz;
Current: 5 A, 20 to 800 Hz
CT burden: <0.5 VA<br> Voltage impedance: 2 M
¥Ø/input
Overload: Voltage input: max. 800 Vrms
Surge voltage: 900 Vrms (for 1 sec.)
Current input: max. 20 Arms
Surge current: 100 Arms (for 1 sec.)
Output: Solid state relay: 250V, 100mA
Accuracy: Energy, Class 1 as per IEC 1036 standards
Power supply: 200-240 Volt ¡¾ 10% 50/60 Hz (100-120 vac available on request)
Consumption:
3 VA
Temperature range: -10 to +40¡É
Relative Humidity: 90% max. non condensing
Standards: IEC1010, VDE 411, Class II with external cabinet
Electromagnetic compatibility:
EN 50082-1; 1992 EN 50082-2; 1994
Autorange: 2 voltage scales, 3 current scales
Offset: automatic amplifier offset correction
Counting: 7-digit electro-mechanical counter
Mounting: DIN rail
Size: 157.5 ¡¿ 90 ¡¿ 58 mm. (9 DIN modules)

     SIZE



     APPLICATIONS

¡Ü Local and remote energy count.
¡Ü Data acquisition systems.
¡Ü PLC or PC-controlled cost-accounting. and management systems.
¡Ü Automation systems.