Megger MIT30 Specifications

30-kV HV Insulation Tester

MIT30

30 kV High Voltage Insulation Tester

Specifically designed for ungrounded test

samples only

Continuously variable test voltage, 0 - 30kV

Test current 0 - 330 µA

Output voltage accuracy, + 1.5% (full scale)

Built-in adjustable ionization indicator

Fail-safe grounding and “zero-start” switches

Rugged, compact, lightweight, and portable

MIT30

DESCRIPTION

The Megger MIT30 is a portable 30-kV insulation tester that has been developed to undertake tests on UST (ungrounded test samples). It satisfies the demand for a variety of high voltage, high accuracy, and low current applications. The MIT30 CANNOT be used on grounded/ earthed test samples. Otherwise, the unit will be damaged.

The MIT30 has a test current of up to 330 µA, and userselectable trip levels from 0 to 360 µA. The MIT30 provides protection to the test piece against flashovers (arcing) and further damage in the event of a breakdown. An audible ionization indicator gives an audio indication of any electrical discharges present during the test period.

The MIT30 can be used to perform step-voltage and proof tests which, when incorporated into a routine maintenance program, can aid in predicting potential failure before breakdown occurs.

The MIT30 will operate from a wide range of input voltages and frequencies. The unit will will operate from 85-264 V ac with a frequency range of 47-440 Hz.

APPLICATIONS

The MIT30 checks the electrical insulation quality and integrity of a wide variety of insulation material on UST ungrounded systems.

Due to the unique combination of up to 30-kV high voltage, high accuracy down to 100 nA, and low current 0-330 µA, the MIT30 has several applications:

Acceptance and maintenance testing of electrical plant:

Switchgear

Buss-bars

Capacitors

Defense industry

Aerospace Industry

Rubber safety glove testing

Testing of vacuum interrupters

Power equipment/plant manufacturers to perform

QA/QC production tests

MIT30

30-kV HV Insulation Tester

FEATURES AND BENEFITS

Ergonomic design ensures ease of use, hence subsequent reduction in instrument learning time. This allows the operator to undertake accurate safety testing in a minimum amount of time.

Fast charging of high-capacitance samples reduces testing times.

Current guard circuit ensures highly accurate

measurements and test results, thus avoiding external interferences that could affect the accuracy of any test results.

Highly accurate voltage and current outputs normally

associated with a test bench or laboratory test set, in a rugged, field-proven case, takes high accuracy into the field environment.

User selectable current trip points provide protection

to the test piece and the operator in the event of a breakdown in the insulation of the object being tested.

Adjustable ionization indicator gives audible indication of

electrical discharges during test.

Universal input 85-264 V ac, 47-440 Hz makes the MIT30 suitable for a wide variety of applications.

Compact, lightweight and rugged construction makes the

unit ideal for field use.

Its rugged, field-proven case has in integrated carry

handle for easy carrying and an air transport pressure relief value which allows the instrument to be safely transported without damage.

Safety and Reliability

Fail-Safe, gravitationally invariant internal grounding

switch

Zero-Start safety provision

Cable interlock with bright LED, visible even in direct

sunlight

Triaxial HV output cable, with integrated HV, guard,

and current sense

Detachable HV output cable, shielded with interlock

provision

Output current overload relay

Switch control and indicating lights for high-voltage ON/

OFF

Protected output for both short/open circuit conditions

Fused power inlet module

SPECIFICATIONS

Output

Voltage: 0 to 30 kV dc (variable negative with respect to earth/ ground) 20MΩ minimum

Maximum Current: 330 µA @ 30 kV

Peak-Peak Ripple: <0.4%

Line Regulation: 0.03%

Load Regulation: 0.001%

Current

330 µA continuous @ 30 kV User selectable trip from 0 to 360 µA

Accuracy

Voltage Meter: ±1.5% (full scale), 10 V resolution

Current Meter: ±1.5% (full scale), 100 nA resolution

Input

Mains: ac: 85 - 264 V ac, 47 - 440 Hz <75 VA

Mechanical

Dimensions: 360 L x 304 W x 194 D mm (14 L x 12 L x 8 D in.)

Weight: 10 kg (22 lb)

Environmental

Operating Temperature: 14o F to 131o F (-10o C to +55o C)

Storage Temperature: -4o F to +158o F (-20o C to +70o C)

Humidity: 0 to 90% RH (non-condensing)

Maximum Altitude (full rating): 1600 m (MSL)

IP Rating

IP67 when closed for transport (Def Stan 81-41/STANAG 4280) IP52 when in use

ORDERING INFORMATION

Item [Qty] Cat. No.

30-kV high-voltage insulation tester MIT30

Included Accessories

HV triaxial output cable, 3 m P1000-921

Input power cord, 120 V 17032

Input power cord, 230 V 17032-12

Instruction manual AVTMMIT30-EN

Optional Accessories

High-voltage resistance discharge stick 222070-62

“The Lowdown on High-Voltage DC Testing” Guide AVTM22P-1

Archcliffe Road, Dover CT17 9EN England T (0) 1 304 502101 F (0) 1 304 207342

UNITED STATES

4271 Bronze Way Dallas, TX 75237-1019 USA T 1 800 723 2861 T 1 214 333 3201 F 1 214 331 7399

OTHER TECHNICAL SALES OFFICES

Valley Forge USA, College Station USA, Sydney AUSTRALIA, Täby SWEDEN, Ontario CANADA, Trappes FRANCE, Oberursel GERMANY, Aargau SWITZERLAND, Kingdom of BAHRAIN, Mumbai INDIA, Johannesburg SOUTH AFRICA, and Chonburi THAILAND

ISO STATEMENT

Registered to ISO 9001:2000 Cert. no. 10006.01

MIT30_DS_USen_V05

www.megger.com Megger is a registered trademark