Gossen Metrawatt M507B – RCD Test Instrument

• Digital display, backlit color OLED display
• LED for measurement point illumination
• Patented means of securing the test probes
• Compact and rugged – for service calls and laboratory use

Testing features

Testing of residual current devices (RCDs)

• Measurement of touch 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 nom. residual current, time to trip measurement

Special tests for equipment and RCDs

• Testing of equipment and RCDs with rising residual current including indication of tripping current
• Testing of RCDs, Iƒ´N = 10, 30, 100, 300 and 500 mA
• Testing RCDs with 1/2 IΔN, 1 IΔN, 2 IΔN, 5 IΔN up 100 mA nominal current)
• Testing RCDs with half-waves (pulsating direct current) for determining time to trip and tripping current

Testing of special RCDs

• selective S, type AC, type A

Measurement of line voltage and fault loop impedance.