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  • Custom microprocessor controlled for highest accuracy and reliability.
  • 3 LEDs for checking correct wiring status.
  • 0 and 180 degree phase angle switch permits quick tests and consistent readings.
  • Digital read-out of tripping time.
  • Constant current source circuitry ensures that a fluctuating mains voltage does not affect the accuracy of readings.
  • Large custom digital display readout.
  • Visual indication of reversed phase and neutral wiring at socket.
  • Designed to IP54 Rating.
  • Complies with IEC 61557
  • Test of a large kind of RCD's: Standard, Selective, AC and A (DC sensitive breakers)


Rated Tripping Current10/20/30/200/300/500mA
Fault Condition Settings× 1/2, × 1, × 5, × DC,
Trip Current Duration1000ms, 200ms (×5)
Lowest Resolution1ms
Trip Time Accuracy±0.6%rdg±4dgt
Operating Voltage230V+10%-15%
(195V – 253V) 50Hz
Safety StandardIEC 61557-1,-6
IEC 61010-1 CAT III 300V
IEC 61010-2-031 Pollution Degree 2
Withstand Voltage3700V AC for 1 minute
IP RatingIEC 60529-IP54
Dimensions167(L) × 186(W) × 89(D)mm
Weight800g approx.
AccessoriesMolded plug test leads
Pouch for test leads
9121 (Shoulder Strap)
Instruction Manual
Optional7121B (Simplified measurement probe)

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