Megger MJ15 Hand Crank/battery 5kV Insulation Tester

The Megger MJ15 analogue 5 kV insulation tester is a completely self-contained instrument designed for high voltage insulation resistance testing in the maintenance and servicing of rotating plant machinery, transformers, switchgear and industrial installations. Tests can be performed at 500 V, 1000V, 2500 V or 5000 V. Insulation measuring range is 100 kΩ to 20 GΩ and Infinity. Automatic discharge for capacitive circuits under test is provided and decaying voltage displayed. Tests are initiated by pressing the ‘Test’ button (or by turning the MJ15 generator handle). Releasing the ‘Test’ button causes the instrument to default to ac/dc voltmeter mode, with a discharge resistor internally connected across the terminals. This feature will give decaying voltage indication following the testing of equipment possessing capacitance. Normal power for the MJ15 is by low voltage, hand cranked, brushless a.c generator. Fitting the battery container supplied, with eight 1,5 V IEC LR6 cells gives the instrument a dual (independent) supply capability. The instrument will operate in any position, but best results are achieved when the instrument is face up, on a firm level surface. FEATURES Large, single scale analog display. Auto voltage measurement function indicates conductor and auto discharge potential. Supplied with optional locking test button. Safety recessed terminals and long connectors. Four output test voltages. Simple to use. CE marked. Dual power supply option on MJ15. Unique scale overlay for pass/fail bands. Resilient mounted analogue scale for robustness. Single scale for insulation values to avoid operator error. Light weight and rugged. Range down to 100 kΩ ideal for go/no go testing. Megger MJ15 Specifications Insulation Range 100 kΩ to 20 GΩ (also 0 Ω and ?). Test Voltages (DC) 500 V, 1000 V, 2500 V & 5000 V. Test Voltage Accuracy +5% of nominal test voltages on 20 MΩ load. Test Voltage Stability <+1% (180 r.p.m. to 240 r.p.m. MJ15). Insulation Accuracy (at 0 - 30°C) (32 to 86°F) +2.5% of full scale deflection. Short Circuit Current 1,5 mA + 0,5 mA. Maximum Capacitance of Load 5 µF. Interference Rejection 1 mA rms at 50 to 60 Hz. Discharge Resistor <500 kΩ. Voltage Range 0 to 600 V a.c. Accuracy + 2,5% f.s.d. a.c. (with rotary switch in the V position). Overload Rating 720 V a.c. or d.c. Scale Length 2,8 in. (72 mm) (96°). Power Supply Low voltage brushless Generator and 8 x AA cells (LR6). Battery Life Typically 2000 five second tests at 5 kV on 100 MΩ load. Battery Indicator Loaded Battery Test. EMC In accordance with IEC 61326-1. Operating temperature 32 °F to 86 °F (0 °C to 30 °C). Storage temperature -13 °F to 149 °F (-25 °C to 65 °C). Dimensions 220 x 160 x 115 mm. Weight 3,5 lbs (1,6 kg), or 4 lbs (1,8 kg) with battery holder and cells. Megger MJ15 warranty 1 year. Safety Meets the safety requirements for double insulation to IEC 1010-1 (1995) EN61010 (1995) to installation Category III***, 300 V phase to earth (ground) or 600 V Category I* ***Relates to transient overvoltage likely to be found in fixed installation wiring. *Relates to transient overvoltage likely to be found in special equipment or parts of equipment, telecommunication, electronic etc.

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