Measurement with three current transformers guarantees an analogue reading of the company meter. The Computer SMART III reactive energy regulator is the only regulator on the market that offers the possibility of using 3 measurement transformers in addition to the conventional method of measuring with a single current transformer, as well as providing the functions of an integral power analyzer and controlling residual leakage currents (WG series current transformers). Computer SMART III is a regulator that ensures excellent preventive maintenance by means of programming its alarms and the options for testing the capacitor status, offering maximum supervision and safety of your compensation unit. Applications The connection of 1 or 3 transformers makes Computer SMART III the perfect regulator in any installation, allowing the following: Changing from 1 to 3 transformers in the following cases: Changes in reactive energy penalties Changes in consumption habits Significant imbalances in the system Replacing the regulator of any capacitor bank Perfect for installations with up to 4 objective cos φ, since it can adapt to any compensation need (different time periods). It can be used with Medium Voltage compensation units. SPECIFICATIONS AC power supply Nominal voltage 100 … 520 V ~ Frequency 50 … 60 Hz Consumption 13 … 20 VA Installation category CAT III 300 V Voltage measurement circuit Nominal voltage 230 V Ph-N, 400 V Ph-Ph Voltage measuring range 20…300 V Ph-N , 35…520 V Ph-Ph Frequency measuring range 45 … 65 Hz Input impedance 660 kΩ Minimum measurement voltage (Vstart) 20 V F-N, 35 V F-F Installation category CAT III 300 V Sampling frequency 45 … 65 Hz Current measurement circuit Nominal current (In) …/5A ó …/1A Phase current measuring range 1 … 120 % In Minimum current measurement 50 mA Measurement accuracy Phase voltage measurement 0.5% ± 1 digit Phase current measurement 0.5% ± 1 digit Active power measurement (kW) 0.5% ± 2 digits Reactive power measurement (kvar) 1% ± 2 digit Active energy measurement (kWh) Class 1 Reactive energy measurement (kvarh) Class 1 Leakage current measurement (ID) Minimum current measurement (Istart) 10 mA Measurement range 0,01 … 1,5 A Secondary nominal current 0,003 A Digital transistor outputs Quantity 2 Type NPN Maximum voltage 24 Vcc Maximum current 50 mA Digital relay outputs Quantity 14 (12 salidas, 1 ventilador, 1 alarma) Maximum open contact voltage 1 kV Maximum current 1A Electrical life 30 x 103 ciclos Mechanical life 5 x 106 Cycles Maximum switching capacity 2500 VA Digital inputs Quantity 2 Type Potential-free contact Input/output insulation Optoisolated Serial communication Technology / Type RS-485 Protocol Modbus RTU User interface Display type LCD Custom COG LED 4 LED Keyboard Capacitive, 5 keys Environmental characteristics Working temperature -10 … 55 ºC Storage temperature -20 … 70 ºC Relative humidity (without condensation) 5 … 95% Protection class IP 51 (Front), IP 31 (unmounted) Mechanical characteristics Envelope Plastic V0 self-extinguishing Fastening Panel Weight (kg) 0,6 Size (mm) width x height x depth 144 x 144 x 71 (mm) Standards Standards IEC 61010, IEC 61000-6-2, IEC 61000-6-4, Medidas conforme a : IEC 61557-12 Electrical safety, Maximum height (m) 2000 DIMENSIONS CONNECTIONS
