MODBUS (RS485) Communication (optional).
Pulse/Limit Switch output (optional).
3 Line 4 Digits ultra bright LED Display (up to 9999).
On site Programmable CT/PT Ratios.
User selectable CT Secondary 1A/5A.
Measurement & Display of Run hours, On hours, Number of interruption.
Application: ALPHA 30A+ measures important electrical parameters
like AC Voltage, AC Current, Frequency, Active, Reactive, Apparent Power, Import & Export Energy & many more.
Input Voltage
Nominal input voltage (AC RMS)
Phase –Neutral 63.5 / 133 / 239.6 / 288.6 V L-N,
Line-Line 110 / 230 / 415 / 500 V L-L
System PT primary values: 100VLL to 692kVLL programmable on site
Max continuous input: 120% of rated value.
Input Current
Nominal input current: 5A / 1A AC RMS
System CT secondary values: 1A & 5A programmable on site
System CT primary values: From 1A up to 9999A (for 1 or 5 Amp)
Max continuous input current: 120% of rated value
Auxiliary Supply
Higher Auxiliary Supply: 60V ... 300V AC-DC
Higher Aux Nominal Value: 230V AC, 50/60 Hz / 230V DC
Lower Auxiliary Supply: 20V ... 60V DC / 20V ... 40V AC
Lower Aux Nominal Value: 48V DC / 24V AC, 50/60 Hz
Frequency range: 45 to 65 Hz
V A Burden
Nominal input voltage burden: < 0.2 V A approx. per phase
Nominal input current burden: < 0.6 V A approx. per phase
Auxillary Supply burden: < 5 V A for AC aux | 4 W for DC aux
Overload Withstand
Voltage: 2 x rated value for 1 second, repeated 10 times at 10 second intervals
Current: 20x rated value for 1 second, repeated 5 times at 5 min intervals
Operating Measuring Ranges
Voltage: 10… 120% of rated value
Current: 5 … 120% of rated value
Frequency: 40…70 Hz / 400 Hz
Power Factor: 0.5 Lag ... 1 ... 0.8 Lead
Influence of Variations
Temperature coefficient
0.05%/°C for Voltage (50... 120% of rated value)
0.05%/°C for Current (10... 120% of rated value)
Display update rate
Response time to step input: 1 sec approx.
