Megger MFT-X1 User Manual

11. Voltage measurement ................................................................................................................... 43
11.1 General .....................................................................................................................................................43
11.2 Hot keys for voltage measurements.......................................................................................................44
11.3 Display for voltage measurements ......................................................................................................... 44
11.4 All voltage measurements ......................................................................................................................44
11.5 Single-phase measurements ...................................................................................................................45
11.6 Three-phase measurements .................................................................................................................... 46
11.7 Phase sequence ........................................................................................................................................46
11.8 Millivolt measurements ...........................................................................................................................47
11.9 Frequency measurement .........................................................................................................................47
11.10 Sending results to a Bluetooth
®
device ................................................................................................47
12. Current measurement ...................................................................................................................48
12.1 General .....................................................................................................................................................48
12.2 Hot keys for current measurements ....................................................................................................... 48
12.3 All current measurements .......................................................................................................................49
12.4 Current measurements ............................................................................................................................49
13. Residual current device (RCD) testing ..........................................................................................50
13.1 General .....................................................................................................................................................50
13.1.1 Types of RCD supported ........................................................................................................................50
13.1.2 RCD test current.....................................................................................................................................50
13.1.3 About the RCD tests ..............................................................................................................................51
13.1.4 The ½ x I test .........................................................................................................................................51
13.1.5 The 1 x I test ..........................................................................................................................................51
13.1.6 The 2 x I test ..........................................................................................................................................51
13.1.7 The 5 x I test ..........................................................................................................................................52
13.1.8 The ramp test .........................................................................................................................................52
13.1.9 Testing at 0º and 180º ............................................................................................................................52
13.1.10 RCD testing inhibit ...............................................................................................................................52
13.2 Hot keys for RCD tests ............................................................................................................................. 53
13.3 Display layout for RCD tests (AUTO TEST example shown) ..................................................................53
13.4 Touch voltage – All RCD, RDC and touch voltage tests ......................................................................... 53
13.5 Automatic RCD testing ............................................................................................................................54
13.5.1 Customising the AUTO test sequence .....................................................................................................55
13.6 RCD testing at a single current ............................................................................................................... 55
13.7 Ramp testing RCDs ..................................................................................................................................57
13.8 Touch-voltage test ................................................................................................................................... 58
13.9 VAR (Variable RCD) .................................................................................................................................59
13.9.1 Using the VAR option ............................................................................................................................. 59
13.9.2 Setting the VAR option ...........................................................................................................................60
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MFT-X1
6

Megger MFT-X1 Specifications

General

Power Supply	Rechargeable Li-ion battery
Phase Sequence Indication	Yes
Resistance Range	0.01 Ω to 100 kΩ
Protection Rating	IP54
Continuity Testing	0.01 Ω to 2000 Ω
Loop Testing	0.01 Ω to 2000 Ω
RCD Testing	Type AC, A, F, B, and B+
Frequency Measurement	15 Hz to 400 Hz
Insulation Test Voltage	50 V, 100 V, 250 V, 500 V, 1000 V
Voltage Range	12 V to 440 V AC/DC
Frequency Range	15 Hz to 400 Hz
Battery Life	Approximately 8 hours