Megger MIT1025, User Manual

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26
Technical Specification
Electrical specification
Voltage input range:
5 kV, 10 kV 90-264 V rms, 50/60 Hz, 100 VA
15 kV 90-264 V rms, 47/63 Hz, 200 VA
Battery 11.1 V, 5.2 A hour, safety rated to IEC
62133:2003
Battery life
MIT515, MIT525:
Typical capacity is 6 hours continuous
@ 5 kV with a 100 M
Ω load
MIT1025: Typical capacity is 4.5 hours continuous
@10 kV with a 100 M
Ω load
MIT1525: Typical capacity is 4.5 hours continuous
@ 15 kV with a 100 M
Ω load
Battery charge time: 2.5 hours from deep discharge,
2 hours from normal discharge
30 min. charge: 1 hour continuous test at 100 M Ω , 5 kV
Test voltages
MIT515, MIT525:
250 V, 500 V, 1000 V, 2500 V, 5000 V
MIT1025: 500 V, 1000 V, 2500 V, 5000 V,10000 V
MIT1525: 1000 V, 2500 V, 5000 V, 10000V,15000 V
User defined test voltage:
MIT515, MIT525:
100 V to 1 kV in 10 V steps,
1 kV to 5 kV in 25 V steps,
MIT1025: 5 kV to 10 kV in 25 V steps
MIT1525: 5 kV to 15 kV in 25 V steps
Accuracy (23 °C) from 1 M Ω to:
MIT515, MIT525: ±5% to 1 T Ω , ±20% to 10 T Ω
MIT1025: ±5% to 2 T Ω , ±20% to 20 T Ω
MIT1525: ±5% to 3 T Ω , ±20% to 30 T Ω
Guard (positioned centrally on insulator): Guards out
parallel leakage resistance down to 250
k
Ω with a maximum additional
resistance error of 1% with a 100 M
Ω
load
Display range analogue: 100 k Ω to 10 T Ω
Display range digital:
MIT515, MIT525: 10 k Ω to 10 T Ω
MIT1025: 10 k Ω to 20 T Ω
MIT1525: 10 k Ω to 30 T Ω
Short circuit current:
3 mA nominal*,
* Maximum power regulation technology ensure maximum
power transfer throughout all loads not just at short circuit
outperforming many 5 mA testers
Insulation alarm: 100 k Ω to 1 G Ω
Capacitor charge:
MIT515, MIT525:
<3 s/ µ F 3 mA (5 kV)
MIT1025: <5 s/ µ F 3 mA (10 kV)
MIT1525: <7.5 s/ µ F 3 mA (15 kV)
Capacitor discharge:
MIT515, MIT525:
<250 ms/
µ
F discharge from 5000 V
MIT1025: <500 ms/ µ F to discharge from 10000 V
to 50 V
MIT1525: <3500 ms/ µ F to discharge from 15000 V
to 50 V
Capacitance range
(above 500 V):
10 nF to 25 µ F (5 kV, 10 kV)
10 nF to 50 µ F (15 kV)
dependant on measurement voltage,