212459 Megger, 212459 Datasheet

212459

Manufacturer Part Number

212459

Description

Battery Analog Major Megger Insulation Tester

Manufacturer

Megger

Datasheet

1.212159.pdf (3 pages)

Specifications of 212459

100, 250, 500 & 1000 V

2 GOhms

Resistance

2000 Ohms

Current Rating

2 mA

Frequency

60 Hz

Measured Components

Voltages

Safety Rating

2.5 % of Full Scale

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

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Major Megger

Insulation Resistance Testers

DESCRIPTION

Quality is crafted into every Major MEGGER® Insulation

Tester, with excellent test voltage regulation, direct

measurement readout and an external guard terminal to

eliminate surface leakage current from the measurement.

Five models are available for general purpose testing which

include a low-voltage model.

All are portable, self-contained instruments designed to give

rapid and accurate measurements.

Four of the models feature an analog display having four

selectable test voltages of 100, 250, 500 and 1000 Vdc,

measuring insulation resistance up to 2000 MΩ, and an ohm

range to 5000 ≈ . The other model has four test voltages of

50, 100, 250 and 500 Vdc measuring insulation resistance up

to 1000 M≈ .

The only other difference between the five analog models is

the type of power source. Power for models MJ159 and

MJ160 is derived from a low-voltage, hand cranked

generator which has been designed to be easy to turn even

under full load conditions. The low-voltage generator is

connected to an electronic inverter to provide a very stable

test voltage. Accuracy of measurement is unaffected by

variations in the generator cranking speed and the test

voltage is maintained at its rated value. Power for model

MJ359 is provided by 120 V ac 50/60 Hz or low-voltage

generator. Model MJ559 is also 120 Vac 50/60 Hz or internal

rechargeable batteries and model MJ459 is powered by 6

replaceable “AA” alkaline cells.

As a safety feature, the ac voltage range becomes effective as

soon as the instrument is connected to the circuit under

test. Therefore, a warning is given that the circuit under test

is not de-energized before the instrument is operated.

Though calibrated for ac voltage, this range also monitors

the automatic discharge feature so that after equipment

having capacitance (i.e. a cable), has been tested, an

indication can be given that the voltage has discharged to a

level that is safe for removing the test leads.

Each instrument has a guard terminal which may be used to

prevent the effects of surface leakage from influencing the

readings. This is achieved by diverting the leakage current

through the guard terminal and away from the instrument’s

measuring circuit.

Each instrument is built into a strong ABS plastic case with a

fold down carrying handle.

APPLICATIONS

The Major Meggers have been designed for convenience

and ease-of-use when testing complex or larger electrical

installations, and commissioning, servicing or maintaining

electrical equipment. They are designed for the safe testing

of motors, generators. cables, switchgear, transformers,

distribution networks, industrial and domestic installations,

components and appliances.

The range of insulation test voltages available allows one

instrument to be used for a variety of applications. For

example, installations and equipment can be tested at

No scale multipliers

Multiple test voltages for spot and step

voltage testing

Guard terminal to eliminate surface

leakage current

Insulation Resistance Testers

MJ TESTERS

Related parts for 212459

212459 Summary of contents

Page 1

... Each instrument is built into a strong ABS plastic case with a fold down carrying handle. APPLICATIONS The Major Meggers have been designed for convenience and ease-of-use when testing complex or larger electrical installations, and commissioning, servicing or maintaining electrical equipment. They are designed for the safe testing of motors, generators ...

Page 2

V d.c. when this requirement is specified, also aircraft and tele-communications equipment can be tested at the relatively low 100 V d.c. and 110 V to 120 V a.c. systems can be tested using 250 V d.c. Test leads ...

Page 3

... Cat. No. Item 212159 Optional Accessories 212359 Test record card (pack of 20) 212459 Black test lead with large alligator clip 212559 Red test lead with large alligator clip Green test lead with large alligator clip 212160 Set of test leads with fused prods (FPK5) - 1000 V a ...

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