Kyoritsu KEW 5410 RCD Testers

The Kyoritsu KEW 5410 is a tester for residual current devices or RCDs, that is used to assess and gauge the functionality of ground fault circuit interrupters, or GFCIs. An RCD is a type of electrical safety device that guards against electric shock by sensing and breaking a circuit as soon as a leak or current imbalance is detected.

An RCD is a safety mechanism that senses an imbalance between live conductors and automatically cuts off the electrical supply. The device tracks the current differential between the active and neutral conductors in a single-phase circuit.

The total current in the line and neutral conductors is zero in a healthy circuit, meaning that there is neither protective conductor current nor fault current flowing to Earth. Thus, some of the line conductor currents will not return through the neutral conductor in the event of a line-to-earth fault.

When the residual current reaches a predetermined limit, known as the “residual operating current,” the RCD operates, monitors this difference, and disconnects the circuit. The Kyoritsu 5410 assesses this.

For more information on other models, such as the KEW 6016 , click on the relevant link

Kyoritsu RCD Testers KEW 5410 specifications:

• Voltage Measurement:

• MEASURING RANGE: 80V～450V 50/60Hz
• ACCURACY: 2%rdg±4dgt
• APPLICABLE STANDARDS: IEC 61010-1 Pollution degree2 CAT III 300V / CAT II 400V
  IEC 61010-031
  IEC 61557-1, 6
  IEC 60529 (IP54)
• DISPLAY: 1999 counts (3 1/2digits), Large LCD
• OPERATING TEMPERATURE & HUMIDITY RANGE: 0ºC – 40ºC, relative humidity 85% (no condensation)
• STORAGE TEMPERATURE & HUMIDITY RANGE: -20ºC – 60ºC, relative humidity 85% (no condensation)
• INSULATION RESISTANCE: 50MΩ or more / 1000V (between electrical circuit and enclosure)
• SLEEP FUNCTION: (1)Automatically enters Sleep mode in 3 minutes after the last switch operation (current consumption 75µA). This function doesn’t work at voltage measurements. To exit from the Sleep mode, set the Function switch to OFF position once, and re-set it to the Range at which a measurement to be conducted.
  (2) Backlight turns off in 1 minute after it lights up.
• POWER SOURCE: DC 12V / R6(AA)(1.5V) × 8