Gossen Metrawatt M520N Offers

Features

• EASY transfer stands for direct incorporation of the Profitest Master into DDS-CAD planning software
• Display of approved fuse types for electrical systems
• Energy meter start-up testing
• Calculation of cable lengths for common copper wire cross-sections
• Measurement of biasing, leakage and circulating current up to 1A, as well as working current up to 150A with the WZ12C current sensor clamp as an accessory
• Phase sequence measurement (including highest line-to-line voltage)
• Measurement of contact voltage without tripping the RCCB
• Contact voltage is measured with reference to nominal residual current using 1/3 of the nominal residual current value
• Tripping test with nominal residual current, tripping time measurement

A broad-range measuring device allows for use of the test instrument in all alternating and 3-phase electrical systems with voltages from 65 to 500V and frequencies of 15.4 to 420Hz.

• Loop and line impedance measurement
• Measurement of insulation resistance using nominal voltage, with variable or rising test voltage
• Low-resistance measurement
• Earth resistance measurement
• Standing-surface insulation measurement
• Universal connector system

Testing of residual current devices (RCCBs):

Measurement of contact voltage without tripping the RCCB. Contact voltage is measured with reference to nominal residual current using 1/3 of the nominal residual current value. Tripping test with nominal residual current, tripping time measurement.

Special testing for systems and RCCBs:

Testing of equipment and RCCBs with rising residual current including indication of tripping current and contact voltage at the moment the RCCB is tripped.

Additional Functions as Compared with the PROFITEST MBASE

Earth Resistance Measurement

• Earth resistance RE (mains operation) I/U measuring method (2/3-wire measuring method via measuring adapter)
• Earth resistance RE (battery operation) 3 or 4-wire measuring method via PRO-RE adapter
• Soil resistivity (battery operation) 4-wire measuring method via PRO-RE adapter
• Selective earth resistance (mains operation) with 2-pole adapter, probe, earth electrode and current clamp sensor (3-wire measuring method)
• Selective earth resistance RE (battery operation) with probe, earth electrode and current clamp sensor (4-wire measuring method) via PRO-RE adapter and current clamp sensor)
• Earth loop resistance (battery operation) with 2 clamps (current clamp sensor direct and current clamp transformer via PRO-RE/2 adapter)

Automatic Test Sequence Function

The use of test sequences is advisable when the same sequence of tests needs to be executed repeatedly with subsequent documentation, for example as required by the standards. Automated test sequences can be created from individual manual measurements with the help of the test sequence function.

Applications

Ideal for the following applications: New Construction, Electricians, Plant Maintenance.