Advanced power quality analyzers (according Standard UNE-EN-50160 and IEC 61000-4-30)


QNA500-A, Advanced power quality analyzers

Code: Q20921.

  • Protocol: Modbus/TCP | ZMODEM | FTP | webserver (HTTP)
  • Memory: 4 GB
  • Memory: Yes
  • Events / Waveform (1 = yes): Yes
  • Web server: Yes
  • Energy accuracy: 0,2S
  • Communications: RS-232 | RS-485 | Ethernet
  • Harmonics: 50
  • Class: A
  • Mounting: Pannel | DIN rail | Wall-mounted



QNA 500 is a modular power quality analyzer designed to measure and record the main electrical parameters and transient disturbances. The measurement is taken in true root mean square (TRMS), with 5 AC voltage inputs, 4 AC current inputs (via ... /5 A current transformers) and a leakage current input.


QNA 500 is designed to supervise the electric installation and problems relating to electric power quality, in order to control production processes and manage incidents. It integrates easily with SCADA applications and interacts with commercially available PLCs, and so can be part of more global data acquisition systems and report to users the information they require at any time. Its modularity and the addition of M-IO8 modules enable the user to also control energy consumption, states of switches or loads, send alarms, and even connect/disconnect loads according to configurable conditions.
When combined with CIRCUTOR PowerVision Plus software, the user can configure customised reports to assess the correct running of the electric installation, and can apply standards such as the EN-50160, event tables such as CBEMA, UNIPEDE or others. By automating this information, the user can view the most important data needed for the relevant analysis with just one click .


Auxiliary battery power supply
15 minutes of continuous operation (QNA500-A)
Battery type
Ni-MH extraíble ( base module)
AC power supply
5 VA
50…60 HZ (Alim.Aux.:módulo base)
Nominal voltage
90…300 Vc.a.(Alim.Aux.:módulo base)
DC power supply
Nominal voltage
100...300 Vdc (Aux. power base module)
Mechanical characteristics
Size (mm) width x height x depth
64 x 125 x 173.3 (mm)
Self-extinguishing V0 plastic
Differential current measurement
≤ 2,5 mm2
Torque setting
0,8 Nm
Cable gauge at power supply terminals
≤ 2,5 mm2
Cable gauge at input and output terminals
≤ 1 mm2
Cable gauge at current terminals
≤ 4 mm2
Cable gauge at voltage terminals
≤ 2,5 mm2
DIN rail 46227 (EN 50022) or Bottom Panel
Weight (kg)
Environmental characteristics
Protection class
IP 41
Relative humidity (without condensation)
Working temperature
-10…+60 ºC
Electrical safety, Maximum height (m)
Electrical safety, Installation category
CAT IV (600 V) o CAT III (1000 V) IEC 61010
IEC 664, VDE 0110, UL 94, IEC 801, IEC 348, IEC 571-1, EN 61000-6-3, EN 61000-6-1, EN 61010-1, EN 61000-4-11, EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-5, EN 55011, IEC 61000-4-30 Class A or Class S
Current measurement circuit
Sampling frequency
512 samples / cycle
Phase current measuring range
1…120% of In (In: 5A)
Permanent overload
120% In (In: 5A, Imax: 6A)
Maximum pulse current
100 A
Voltage measurement circuit
Sampling frequency
512 samples / cycle
Frequency measuring range
42.5…69 Hz
Nominal voltage
0...500V Ph-N / 0...866V Ph-Ph
Insulation voltage
1.2/50µs (8/20µs) 6 kV
Maximum permanent measurement voltage
1500 V (Ph-Ph)
Electrical characteristics
Insulation voltage, circuit
1.2/50µs (8/20µs) 6kV
ModBus/RTU, ModBus/TCP, Cirbus, TCP/IP
Electrical safety
Double-insulated electric shock protection class II (IEC 61010-1)
Leakage current measurement (ID)
Sampling frequency
64 samples / cycle
Measurement range
0-3 A
Maximum current
3 A
Measurement accuracy
Current unbalance (Kd)
±5 % (IEC61000-4-30 class A)
Voltage unbalance (Kd)
±5 % (IEC61000-4-30 class A)
Active energy measurement (kWh)
0,2 % (in accordance with IEC 62053-22)
Active power measurement (kW)
0,2 % (in accordance with IEC 62053-22)
Phase voltage measurement
0,1 % (IEC-61000-4-30 class A)
Pst Flicker
According to IEC 61000-4-15
Current harmonics (THD)
According to IEC 61000-4-7
Voltage harmonics (THD)
According to IEC 61000-4-7
Analoque to digital converter (ADC)
24 bits
Sampling frequency
512 samples/cycle per channel




User's manual
Technical guide
Diagram connection