Atec MIT1020-2 User Manual

MIT520/2 and MIT1020/2

5 kV and 10 kV Insulation Resistance Testers

MIT520/2 and MIT1020/2

5 kV and 10 kV Insulation Resistance
Testers

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CAT IV 600 V

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Mains or battery powered

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Variable test voltage from 50 to 5000 or

10,000 V

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Automatic IR, PI, DAR, SV and DD tests

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Measures to 15 TΩ (5 kV) and 35 TΩ

(10 kV)

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RS232 and USB download of results to

Megger Download Manager

DESCRIPTION

The new 5 and 10 kV insulation resistance testers from
Megger are designed specifically to assist you with the testing
and maintenance of high voltage electrical equipment. IEEE
43-2000 recommends the use of 10 kV for motor windings
rated above 12 kV and the Megger MIT1020/2 facilitates this.
The case is incredibly rugged and easy to carry, being made
of tough polypropylene and achieving an ingress protection
rating of IP65. In addition, the model number is marked on
both sides of the case for ease of identification in stores or
vehicles.

The instruments have a large easy to read backlit LCD
display making it equally suitable for use in both bright
sunlight and poorly lit environments. Information displayed
includes resistance, voltage, leakage current, capacitance,
battery status and time constant. In addition, the elapsed
time of the test is displayed constantly, removing the need
for separate timers. Adjustable timers and limit alarms are
included.

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On board memory for results storage

The instrument is fitted with a guard terminal to enhance
accuracy. The guard test lead is included as standard with the
instrument.

To further enhance the flexibility of the instruments both
have the facility to set the test voltage in steps from 50 V to
the maximum output voltage avoiding the expense of several
insulation resistance testers to meet your application needs.

These IR instruments are designed to meet the highest safety
standards and meet the requirements of EN61010. In addition,
the instrument measures the voltage at the terminals and if
this is above 50 V then the instrument will display the high
voltage warning and inhibit testing. At the end of the test the
instrument will automatically discharge the energy transferred
to the equipment during the test phase.

The MIT520/2 and MIT1020/2 are equally suited to routine
testing and diagnostic regimes being pre-programmed with
IR, PI, DAR, SV and DD profiles.

The instrument can test when being powered by the mains
or its internal rechargeable battery, a great benefit when site
conditions are unknown or long term testing is required.

The controls of the instrument are clear and unambiguous
and a “quick start” guide is included in the lid of the instrument
removing the need to carry bulky manuals under site conditions.

MIT520/2 and MIT1020/2

5 kV and 10 kV Insulation Resistance Testers

SPECIFICATION

Voltage input range

85-265 V rms, 50/60 Hz, 60 VA

MIT520/2 battery life

Typical capacity is 6 hours continuous testing at 5 kV with a 100 MΩ
load

MIT1020/2 battery life

Typical capacity is 4 hours continuous testing at 10 kV with a
100 MΩ load

MIT520/2 test voltages

50 V to 1 kV in 10 V steps, 1 kV to 5 kV in 25 V steps

MIT1020/2 test voltages

50 V to 1 kV in 10 V steps, 1 kV to 10 kV in 25 V steps

MIT520/2 accuracy (23 °C, 5 kV)

5000 V 2500 V 1000 V 500 V 250 V

±5% to 1 TΩ 500 GΩ 200 GΩ 100 GΩ 50 GΩ
±20% to 10 TΩ 5 TΩ 2 TΩ 1 TΩ 500 GΩ

MIT1020/2 accuracy (23 ºC, 10 kV)

10 kV 5000 V 2500 V 1000 V 500 V 250 V

±5% to 2 TΩ 1 TΩ 500 GΩ 200 GΩ 100 GΩ 50 GΩ
±20% to 20 TΩ 10 TΩ 5 TΩ 2 TΩ 1 TΩ 500 GΩ

Guard

2% error guarding 500 kΩ leakage with 100 MΩ load

Display range

Digital display (3 digits) 10 kΩ to 15 TΩ (MIT520/2)
to 35 TΩ (MIT1020/2)
Analogue display 100 kΩ to 1 TΩ

Short circuit/charge current

3 mA @ 5 kV (MIT520/2) or 10 kV (MIT1020/2)

Capacitor charge time

<3 seconds per µF at 3mA to 5 kV (MIT520/2)
<5 seconds per µF at 3mA to 10 kV (MIT1020/2)

Memory capacity

32 kB

Test regimes

Auto IR, PI, DAR, SV and DD.

Interface

RS232 and USB

Data store

Voltage, test time, leakage current, resistance, PI, DAR, DD,
capacitance and time constant

Real time output

Serial, once per second of test voltage, current and resistance

Operating temperature

-20 °C to 50 °C

Storage temperature

-25 °C to 65 °C

Ingress protection (lid closed)

IP65

Humidity

90% RH non-condensing at 40 °C

Safety

Meets the requirements of IEC61010-1 CATIV 600 V

EMC

Meets the requirements of IEC61326-1

Dimensions

305 x 194 x 360 mm (12.7 x 6 x 14.2 inches)

Weight

7.1 kg (16lb) approx.

Capacitor discharge time

<120ms per µF to discharge from 5000 V to 50 V (MIT520/2)
<250ms per µF to discharge from 10000 V to 50 V (MIT1020/2)

Capacitance measurement (above 500 V)

10 nF to 50 µF (dependent on measurement voltage)

Capacitance measurement accuracy (23 °C)

±5% ±5 nF

Voltage output accuracy (0 °C to 30 °C)

+4%, -0%, ±10 V of nominal test voltage at 1 GΩ load

Current measurement range

0.01 nA to 5 mA

Current measurement accuracy (23 °C)

±5% ±0.2 nA at all voltages

Default voltmeter range:

50-600 V a.c. or d.c. Accuracy (23 ºC) + or -2% + or -1 V

Interference rejection
MIT520/2 1 mA per 250 V up to a maximum of 2 mA
MIT1020/2 1 mA per 600 V up a maximum of 2 mA

Timer range

Up to 99 minutes and 59 seconds from start of test
15 second minimum setting for test voltage ≥1000 V
30 second minimum setting for test voltage <1000 V