Gossen Metrawatt M520N - Test Instrument
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 500 V and frequencies of 15.4 to 420 Hz.
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 an indication of tripping current and contact voltage at the moment the RCCB is tripped
- Testing of RCCBs with: ½ × IΔN, 1× IΔN, 2× IΔN, 5× IΔN
- 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 the 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.