Atec Megger-BM Series User Manual
Page 3
BM11, BM11D, BM21 and BM25
5 kV Analogue/Digital Insulation Testers
BM21
BM25
All BM11D features plus:
All BM21 features plus:
n
Variable test duration controlled by timer
n
RS232 real time download
n
Variable test voltage in 25 V steps to 5000 V
n
Dielectric Discharge Test
n
Leakage current and capacitance measurement
n
Automatic Polarisation Index Tests
n
Breakdown or Burn modes
n
Automatic Step Voltage Tests
n
Tests to 5,000 G
BM21: as BM11D plus;
n
Variable test voltage in 25 V steps
n
Breakdown or ‘Burn’ modes allow choice of diagnostic
approach
n
Shows capacitance at end of test
n
Timer sets test duration for easier test control
n
Tests to 5,000 GΩ
n
Leakage current mode
BM25: as BM21 plus;
n
Automated testing for increased productivity
n
Polarisation Index and Step Voltage tests
n
Dielectric Discharge test for multilayer insulation
n
Optically isolated RS232 port for real-time download
Test voltages (d.c.) 500, 1000, 2500, 5000 V
500, 1000, 2500, 5000 V
Accuracy (20°C)
±5% on open circuit
±5% on 100 MΩ load
Insulation
100 kΩ to 100 GΩ; at all test voltages
Digital 10 kΩ to 50 GΩ @ 500 V
Resistance
10 kΩ to 100 GΩ @ 1000 V
Range
10 kΩ to 250 GΩ @ 2500 V
10 kΩ to 500 GΩ @ 5 kV
Analogue 100 kΩ to 1 TΩ @ all voltages
Basic Accuracy
±1,5% of arc length
±5% of reading 10 MΩ to 100 GΩ @ 5 kV
Short Circuit
Current
1 mA nominal, 2 mA max.
1,8 mA nominal, 2 mA max.
Voltage Range
50 to 1000 V d.c. or a.c.
50 to 1000 V d.c. or a.c.
Accuracy (20°C)
±5% ±10 V
±2% ±1 V
Display
Analogue
Analogue/digital (3 digits)
Interference
Rejection
2 mA a.c. (50/60 Hz) on 5 kV range
1 mA r.m.s. per kV to a maximum 2 mA
Capacitor
Discharge Time
<1 s per µF to discharge from 5000 V to 50 V
<2 s per µF to discharge from 5000 V to 50 V
Leakage current
measurement
None
None
Capacitance
measurement
None
None
Timer
None
Automatic; 0 to 60 minutes
Temperature
Operating -15 to +55°C (5 to +131°F)
Operating -20to +50°C (-4 to 122°F)
Range
Storage -40 to +65 °C (-40 to +149°F)
Storage -25 to +65 °C (-13 to +149°F)
Temperature
Coefficient
< 0,04% of arc length per °C (0.2%/°F)
(Applies over range 0 to 30°C) (32 to 86°F)
0,2% per °C (0.1%/°F) for test currents >100 nA 0,1% per °C to test voltage (0.05% per °F)
Humidity Range
90% RH @ 40°C max. (104°F)
90% RH @ 40°C max. (104°F)
Safety
IEC348
IEC1010-1 (1995), EN61010 (1995) to installation
category III, 300 V, phase to earth, 500 V phase to phase
Test voltages (d.c.)
500, 1000, 2500, 5000 V; plus 25 to 5000 V in 25 V steps
Accuracy (20°C)
±5% on 100 MΩ load ±25V for test voltages <500 V
Insulation
Digital
10 kΩ to 500 GΩ @ 500 V
Resistance
10 kΩ to 1 TΩ @ 1000 V
Range
10 kΩ to 2,5 TΩ @ 2500 V
10 kΩ to 5 TΩ @ 5 kV
Analogue 100 kΩ to 1TΩ @ all voltages
Basic Accuracy
±5% of reading 1 MΩ to 1 TΩ @ 5 kV (0 to 30°C) (32 to 86°F)
Short Circuit
Current
1.8 mA nominal, 2 mA max.
Voltage Range
50 to 1000 V d.c. or a.c. (0 to 5000 V d.c. when testing)
Accuracy (20°C)
±2% ±1 V
Display
Analogue/digital (3 digits)
Interference
Rejection
1 mA r.m.s. per kV to a maximum 2 mA
Capacitor
Discharge Time
<2 s per µF to discharge from 5000 V to 50 V
Leakage current
measurement
0,01 nA to 999 µA Accuracy ±5% ±0,2 nA
Capacitance
measurement
0,01 - 10,0 µF (displayed at end of test) Accuracy ±15% ±0,03 µF
Timer
User selectable 0 to 90 minutes. Test is terminated at end of preset time
Temperature
Operating -20 to +50 °C (-4 to 122 °F)
Range
Storage -25 to +65 °C (-13 to +149 °F)
Temperature
Coefficient
(Applies over range 0 to 30 °C) (32 to 86 °F)
0,2% per °C for test currents >100 nA
Humidity Range
90% RH @ 40°C max. (104°F)
Safety
IEC1010-1 (1995), EN61010 (1995) to installation
category III, 300 V, phase to earth, 500 V phase to phase