To verify LV installations and, with the same instrument, record the power quality of a three-phase network when a problem appears, an IEC 61557 multifunction meter with a built-in class S recorder to EN 61000-4-30 is enough. The AMPI-540 measures fault loop, RCDs, insulation, earth and continuity, and records voltages up to 500 V to ±0.5% of Unom, currents up to 3000 A depending on the clamp, frequency to ±0.05 Hz and harmonics up to the 40th, all operated from a 7-inch touchscreen.
AMPI-540 key data
- Standards: installation measurements to IEC 61557 (insulation to IEC 61557-2, continuity to IEC 61557-4 and earth to IEC 61557-5); three-phase recorder compliant with class S of EN 61000-4-30 (IEC 61000-4-30:2015); measuring category CAT IV 300 V / CAT III 500 V per EN 61010.
- Fault loop: ZL-PE, ZL-N and ZL-L from 0.13 to 1999.9 Ω with ±(5% m.v. + 30 digits); in RCD-protected circuits, from 0.50 to 1999 Ω without tripping with ±(6% m.v. + 5 digits); the AMPI-540 also measures the loop in IT networks and the voltage drop between two points.
- RCD testing: trip time tA at 0.5, 1, 2 and 5 IΔn with ±(2% m.v. + 2 digits), up to 300 ms for general and short-time delay RCDs and 500 ms for selective RCDs; trip current IA from 0.2 to 2.0 IΔn for AC (3.3…1000 mA, ±5% IΔn), A (3.5…700 mA) and B types (2.0…1000 mA), with ±10% IΔn; automatic mode.
- Insulation, earth and continuity: insulation at 50, 100, 250, 500 and 1000 V with ±(3% m.v. + 8 digits) and the AutoISO-1000C adapter for 3-, 4- and 5-core cables; 3- and 4-pole earth from 0.50 Ω to 1.99 kΩ with ±(2% m.v. + 3 digits), with clamp, with two clamps and soil resistivity; continuity at ±200 mA from 0.12 to 400 Ω with ±(2% m.v. + 3 digits).
- Power quality recorder: single-phase, split-phase, three-phase wye with or without neutral, delta and DC networks; voltage up to 500 V to ±0.5% Unom; current depending on the clamp up to 3000 A AC to ±2% of the measured value from 10% of Inom; frequency from 40 to 70 Hz to ±0.05 Hz; harmonics from DC to the 40th and THD; unbalance from 0 to 10% to ±0.15%; cosφ and PF to ±0.03; four-quadrant energy.
- Events and recording: dips, swells, interruptions and current thresholds with ANSI and CBEMA graphs; 16-bit converter at 5.12 kHz with simultaneous sampling; averaging periods from 1 s to 30 min on a 4 GB microSD card; live view with oscilloscope, phasor diagram and harmonic spectrum.
- Display and communication: 7-inch colour TFT touchscreen with 800 × 480 pixels, usable with a stylus even when wearing dielectric gloves; unlimited result memory; transfer over USB, Bluetooth, Wi-Fi or the microSD card.
- Power and construction: 11.1 V 3.4 Ah (37.7 Wh) Li-Ion battery for more than 3000 loop or RCD measurements and about 16 h of recording; IP51 housing, 0 to +45 °C, 288 × 223 × 75 mm and approx. 2.5 kg.
Advantages
One instrument instead of several
It measures fault loop impedance also in RCD circuits without tripping, RCD parameters, insulation, earth by four methods with soil resistivity, continuity, light intensity, phase sequence and motor rotation direction.
Three-phase class S recorder
It logs voltages up to 500 V, currents up to 3 kA, frequency from 40 to 70 Hz, powers, power factor, harmonics up to the 40th and THD in accordance with class S of EN 61000-4-30.
A 7-inch touchscreen
The 800 × 480 pixel TFT touch panel shows built-in help diagrams, an oscilloscope view, a phasor diagram and results that remain legible in any conditions.
Automated measurements
Autotest sequences, the automatic RCD test mode and the AutoISO-1000C adapter shorten measuring time; a voice note or a photograph can be attached to each result.
Expandable memory and full connectivity
The removable microSD card extends the memory easily, and data is transferred over USB, Bluetooth or Wi-Fi for reporting and record analysis.
Applications
- Verification of domestic and industrial electrical installations to current regulations.
- Power quality logging and basic diagnostics of three-phase networks.
- Detection of potential savings with the energy loss calculator.
- Documented electric shock protection measurements with reports.
About the product
The AMPI-540 sits in an IP51 housing of 288 × 223 × 75 mm with CAT IV 300 V measuring category and an 11.1 V 3.4 Ah Li-Ion battery; the 7-inch touchscreen, the microSD card and the USB, Bluetooth and Wi-Fi interfaces make it a complete platform for verifying installations and recording power quality.
Technical specifications
| Measuring category | CAT IV 300 V / CAT III 500 V per EN 61010 |
| Installation tests | Loop, RCD, insulation, earth, continuity, lux |
| Recorder class | Class S per EN 61000-4-30, three-phase |
| Recording ranges | U up to 500 V; I up to 3 kA; 40…70 Hz |
| Power quality | P, Q, S, PF, cosφ; harmonics to 40th; THD |
| Display | 7-inch touchscreen, TFT 800 × 480 pixels |
| Memory | Removable microSD card (4 GB); voice notes, photos |
| Communication | USB, Bluetooth and Wi-Fi |
| Power supply | Li-Ion battery 11.1 V 3.4 Ah with charger |
| Protection | IP51; operating temperature 0…+45 °C |
| Dimensions and weight | 288 × 223 × 75 mm; approx. 2.5 kg |
| Recorder accuracy | U ±0.5% Unom; I ±2% m.v. (≥10% Inom); f ±0.05 Hz; cosφ and PF ±0.03 |
| Installation measurement accuracy | ZS ±(5% m.v. + 30 digits); RISO ±(3% m.v. + 8 digits); RE ±(2% m.v. + 3 digits) |
| Recorder networks | Single-phase, split-phase, three-phase wye with or without N, delta and DC |
Frequently asked questions
Which networks can the AMPI-540 record?
Single-phase, split-phase with common neutral, three-phase wye with or without neutral and delta networks, as well as DC networks, with nominal voltages from 64/110 V to 290/500 V; current is measured with flexible clamps up to 3000 A AC, rigid clamps from 12 A to 1000 A AC or the C-5A Hall-effect clamp up to 1400 A DC.
How long can the AMPI-540 record?
About 16 hours on the 11.1 V 3.4 Ah Li-Ion battery; for longer recordings the external 12 V adapter is connected. Parameters are averaged over periods from 1 s to 30 min and saved to the microSD card, so with a 10 s period the maximum recording time is ten times longer than with 1 s.
What does the AMPI-540 add over a classic installation meter?
A three-phase class S power quality recorder to EN 61000-4-30, a 7-inch touchscreen, a removable microSD memory card and Wi-Fi communication, on top of all standard verification measurements.
Which power quality parameters does it record?
Voltages, currents, frequency, active, reactive and apparent power, power factor, cosφ, harmonics up to the 40th and THD for voltage and current.
Can measurements be automated?
Yes. Factory autotest sequences can be extended with user sequences, the RCD test has an automatic mode and the AutoISO-1000C adapter tests multi-core cables automatically.
How is data documented?
A voice note or photograph can be attached to each measurement, and results move quickly from meter to report over USB, Bluetooth, Wi-Fi or the microSD card.
What battery does it use?
A rechargeable 11.1 V 3.4 Ah Li-Ion battery that extends the operating time of the meter.
