MEGGER BM5200 INSULATION RESISTANCE TESTER

SPECIFICATIONS MEGGER BM5200 INSULATION RESISTANCE TESTER

Insulation range: 100 kΩ to 1 TΩ

Nominal test voltages: 250 V, 500 V, 1000 V, 2500 V, 5000 V

Terminal voltage accuracy:

<1000 V 0…+10% of nominal test
voltage
≥1000 V 0…+5% of nominal test voltage

Insulation accuracy:

Up to 1 GΩ: All ranges ±5% ±2 digits
Over 1 GΩ:
5000 V ±5% ±0.04% per GΩ
2500 V ±5% ±0.08% per GΩ
1000 V ±5% ±0.2% per GΩ
500 V ±5% ±0.4% per GΩ
250 V ±5% ±0.8% per GΩ

Short circuit/charge current: 1.4 mA ±0.5 mA

Maximum capacitance of load: 5 μF

Voltmeter accuracy: 3% ± 3 V

Frequency measurement: 45 Hz to 65 Hz

Frequency measurement accuracy: ±2 Hz

Voltmeter range: up to 600 V a.c. or d.c.

Power supply: 8 x LR6/AA batteries

Battery life: 5 hours @ 5 kV into 100 MΩ with AA Alkaline LR6

Guard: 2% error guarding 5 MΩ leakage on 100 MΩ load

Operating temperature range and humidity: -20 °C to +55 °C

Humidity:

90% RH, 0 °C to 40 °C
70% RH, 40 °C to 55 °C

Storage temperature range and humidity: -20 °C to +65 °C

IP rating: IP40

Safety protection: Insulation Cat III 600 V

Note: Service error with stated environmental limits is twice intrinsic error

EMC: The product conforms to IEC 61326

Dimensions: 220 mm x 115 mm x 163 mm

Weight: 1.45 kg

Introduction MEGGER BM5200 Insulation Resistance Tester

The Megger BM5200 tester is a battery powered instrument with digital and analogue arc display, designed for high voltage insulation resistance testing in the maintenance and servicing of cables, rotating plant machinery, transformers, switchgear and industrial installations. DC insulation tests are performed at 250 V, 500 V, 1000 V, 2500 V and 5000 V. Insulation resistance measuring range is 100 kΩ to 1000 GΩ. Automatic discharge for capacitive circuits under test is provided and decaying voltage displayed.

The guard terminal can be used to minimise the effects of surface leakage and hence erroneous measurements when carrying out insulation resistance tests. Three insulation resistance (IR) test modes are provided, (InS, PI and t) and available in any IR test range. In IR mode (InS) tests are initiated by pressing and holding down the TEST button for two seconds and terminated by a second press of the TEST button. A Polarisation Index (PI) mode performs a ratio metric test that calculates the ratio of insulation resistance at ten minutes to insulation resistance at one minute. The IR test timer (t) mode facilitates a single fixed time test based on the set time interval t. For capacitive test objects the instrument will automatically discharge through an internal resistor and indicate voltage across the terminals in the range 25 V to 600 V with higher voltages indicated by ‘>600 V’. This feature will give decaying voltage indication following the testing of reactive loads. When the voltage indicator disappears it is safe for the user to disconnect the test leads.

The BM5200 is powered by eight 1.5 V IEC LR6 (AA) cells. Design safety features include high voltage warning indicator, external voltage display after IR test, automatic discharge of reactive loads and test leads.