01925 720 001
  • Megger FT4 Flash Tester

Megger FT4 Flash Tester

Megger

£60.00 per week


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The Megger® FT4 Flash Tester operates from the mains supply and provides a continuously variable a.c. test voltage up to a maximum of 4 kV. The a.c. voltage frequency is that of the supply. A simple function switch permits selection of one of the three modes of operation ‘Breakdown’, ‘Trip Level’ and ‘Burn’.

In the ‘Breakdown’ mode the instrument responds only to the high frequency signals produced by the flashing arc of breakdown and trips the test voltage only when this occurs. In the ‘Trip Level’ mode the output voltage is tripped when the pre-set threshold level of leakage current is exceeded or if breakdown occurs. For the ‘Burn’ mode of operation the output is maintained irrespective of leakage current or breakdown; the output voltage drops to limit the level of current flowing.

Leakage and breakdown failure are indicated by the illumination of the fail lamp and the sounding of an internal buzzer. In the ‘Trip Level’ mode, the pre-set leakage current level is variable between 0,3 mA and 3 mA. Leakage current in all modes is indicated on an analogue meter.

In the ‘Burn’ mode, neither the failure signals nor the circuit tripping occurs, but the voltage drops to limit the current flowing during burning at the fault. The ‘Burn’ mode is provided to enable the point of breakdown failure to be located. As a safety feature, when the output voltage is tripped due to a failure in the test item, an interlock system keeps the voltage switched off until the circuit is manually re-set by turning the voltage control to zero. The equipment is designed to BS and IEC safety standards.

Output sockets are provided for the two ranges and there is a common earth terminal. An illuminated power supply switch indicates when the instrument is connected to an energized supply and another lamp illuminates to warn that the output test voltage is being applied. The instrument is robust and built into a strong, portable, plastic case, with a cover to protect the front panel controls and terminals.

Features

  • Ideal for testing Class 1 and Class 2 equipment
  • Two ranges of test voltage
  • Output control has safety zero interlock
  • ‘Breakdown’, ‘Trip Level’ and ‘Burn’ modes of operation
  • Audible and visual indication of breakdown and excessive leakage current
Datasheet PDF