Catalog of Insulation Tester


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Catalog of Insulation Tester - doc00031

Insulation Resistance Analyzer DRT101

Measures upto 20 million megohms (20 Tera ohms)
Polarization index measurement
Audible indication for GO - NOGO test,
Step voltage testing facility
Test voltages : 100v, 250v, 500v,750v, 1000v
Safe to operate, free from hazards
Bright 0.5' LED display

Advance Technical Information

Insulation resistance analyzer DRT101 is a rugged test bench instrument for measuring high value of Insulation and pure resistances and helps in evaluating Polarization index and conducting step voltage tests. The IR values and polarization index of transformer is recorded and when tallied with performance feedbacks of the transformers can help in quality assurance & control, Incoming inspection of any company would need one to help evaluating insulation cables, switches, relays connectors etc.

Test That Can be Carried Out With The DRT101

10 second resistance tests.
1 minute insulation resistance test.
Polarization index evaluation.
Step voltage tests.
Greater than range, lesser than range, sorting (Meggar Mode).

A high resistance guarded specimen tray is provided with each instrument to carry out error free measurement.

In meggar mode specimens with resistance > or < 200 M ohm, 2 G ohm, 200 G ohm, 2 T ohm or at half and quarter range at 250 V, 500 V, 1000V can be sorted faster with the help of the buzzer sound.

Insulation resistance of cables of standard lengths can be done by conventional methods of guarding the cable. But using DRT101 directly to read the high resistance instead of a bridge.

Applications

Measures Insulation resistance and polarization index of transformer between windings & between any winding and core.
Measures Insulation resistance of Motors, Alternators Generators.
Measures Isolation resistance of switch contacts in off position.
Measures Isolation resistance of relay contacts when open and insulation resistance between any contact and winding.
Measures Isolation resistance of standard cable lengths with suitable arrangement.
Measures Isolation resistance between adjacent tracks in a PCB and in connectors [this is of relevance in High Impudence Circuits]
Measures leakage resistance of low value high voltage capacitors.
Measures mains powered equipment isolation resistance to 230 VAC.

Technical Specifications

Resistance ranges:

Mode A at 250V, 500V, 1000V.
200 M ohm, 2 G ohm, 20 G ohm, 200 G ohm, 2 T ohm.

Mode B at only 100V (10).100V range.
20 M ohm, 200 M ohm, 2 G ohm, 20 G ohm, 200 G ohm.

Mode C at only 1000 V (x 10).1000 V range.
2 G ohm, 20 G ohm, 200 G ohm, 2 T ohm, 20 T ohm:

Accuracy:

200 M ohm, 2 G ohm, 20 G ohm, 200 G ohm -- +/- 1 %. +/- 1 digit.
2 T ohm -- +/-3% +/- 1 digit,
20 T ohm -- +/-5 % +/- 1 digit.

Test voltages:
100V, 250V, 500V, 750V, 1000V, -- +/- 1%

All specification valid after 15 minutes warm up.

General Data

Power requirements : 220-240V AC, 50 Hz, +/- l%.

Power consumption : 20 VA max

Environmental operating range : +7 deg C to +35 deg C, 20% to 35% RH.

Storage temperature : -35 deg C to +65 deg C

Size : 12" W, 4" H, 9.2" D.

Weight : 2.2 kilograms

Quality Control

100 hr burn in for 3 cycles.
Vibration tests
Voltage regulation tests
Overload tests.

Accessories

Mains power cord .
Teat lead set (black, red, BNC)
High resistance guarded tray
Instruction manual

Manufactured And Serviced By

DACT Elektrotech
40, South Rod Road. Basavanagudi,
Bangalore 560004 India

This is the catalog of a product i made and sold 15-20 years back at around Rs. 5000 each.

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