Description

Electrical Installation Multi-function Meter MPI-535 Technical Specifications

Fault loop impedance measurements:

• Impedance measurement with 23 A current (40 A for V_p-p)
• Max. resolution 0.001 Ω
• Fault current-limiting resistor: 10 Ω
• Range of measurement voltages: 95 – 440 V | Frequencies 45 – 65 Hz
• Fast (up to 5 s) fault loop impedance measurement in systems protected with RCDs not tripping at I_Δn ≥ 30 mA
• Automatic calculation of fault current based on nominal or measured voltage
• Differentiation of phase-to-neutral and phase-to-phase voltage
• Selection of installation protections and automatic evaluation of measurement results

Testing of AC, A, F, B, and B+ residual current devices:

• Measurement of general, short-time delay and selective RCDs with rated residual currents of 10 | 30 | 100 | 300 | 500 | 1000 mA
• Measurement of touch voltage UB and protective conductor resistance R_E without tripping the RCD
• The function of automatic measurement of all RCD parameters
• The shape of the input leakage current selected by the user: sinusoidal (start from rising or falling edge) | unidirectional pulsating (positive or negative)
  |unidirectional pulsating with direct current offset (positive or negative)|constant (positive or negative)
• Measurement of tripping current I_A with rising current
• Measurement of tripping time t_A with currents 0.5 I_Δn, 1 I_Δn, 2 I_Δn, and 5 I_Δn
• Detection of L and N phase swapping in a socket; does not affect measurements
• The capability of measuring tripping current I_A as well as actual tripping time t_AI with just one RCD trip
• Voltage measurements within the range of 95 – 270 V

Measurement of insulation resistance:

• Measurement voltages: 50 V, 100 V, 250 V, 500 V, 1000 V
• Capability measurement in-socket utilizing UNI-Schuko adapter
• Measurement of insulation resistance up to 3 GΩ
• Sound signaling of five-second time intervals, facilitating the capture of time characteristics
• Meter protected against the presence of voltage on the object and the appearance of voltage during measurement
• Automatic discharge of the measured object’s capacitance after completion of the measurement
• Automatic measurement of all resistance combinations of 3-, 4- and 5-core cords utilizing the optional AutoISO-1000C adapter

Earth resistance measurements:

• According to 3- or 4-lead technical method with 2 auxiliary electrodes
• According to the double-clamp method
• Internal power source with a frequency appropriate for 50 Hz or 60 Hz power network

Soil resistivity measurements according to the Wenner method:

• Measuring range: 0.5 Ωm – 9.99 kΩm
• Distances between electrodes can be set in meters (1 – 30 m) or feet (1 – 90 ft)

Low-voltage continuity testing of protective conductors and equipotential bonding:

• Measuring range according to EN 61557-4: 0.12 – 400 Ω, max. resolution 0.01 Ω
• Measurement of protective conductor continuity with current ≥200 mA in two directions
• Low-current measurement with sound signaling
• The voltage on open terminals: 4 – 9 V
• Automatic calibration of test leads – leads of any length can be used

Additional functions of the meter:

• A quick check of correct connection of PE conductor using contact electrode
• Check of phase sequence and direction of motor rotation
• The capability of charging from the power grid or 12 V car lighter socket
• Tree-like memory structure with dynamic management
• Data transmission to PC via USB

Other technical specifications:

• Type of insulation – double, as per EN 61010-1 and EN 61557
• Power supply – Li-Ion rechargeable battery 11.1 V | 3.4 Ah | 37.7 Wh
• Operating temperature range 0 – +50°C

The instrument meets the requirements outlined in the standards:

• EN61010-1 (general and particular requirements related to safety)
• EN61010-031 (general and particular requirements related to safety)
• EN61326 (electromagnetic compatibility)
• EN61557 (requirements for measurement instruments)
• HD 60364-6 (performance of measurements – checking)
• HD 60364-4-41 (performance of measurements – shock protection)
• PN-PN-E 04700 (performance of measurements – commissioning tests)
• EN 12464 (lighting workplaces)

Calibration certificates are issued during the production process. New calibration certificates are available upon request at an additional cost.