Delta 4000 Instruction Manual download pdf (Page 9)

81331 Rev 01 Nov 2010

Introduction

Receiving Instructions

Check the equipment received against the packing list to ensure that all materials

are present. Notify Megger of any shortage.

Examine the instrument for damage received in transit. If damage is discovered,

file a claim with the carrier at once and notify Megger, giving a detailed

description of the damage.

This instrument has been thoroughly tested and inspected to meet rigid

specifications before being shipped. It is ready for use when set up as indicated

in this manual.

General Information

The DELTA4000 is used for shop and field testing of high-voltage electrical

insulating systems at test voltages up to 12 kV. Test results can be used to

evaluate the nature and quality of electrical insulating materials and

manufacturing processes to reveal contamination, fractures, punctures, and other

defects that accompany the aging of insulation. The test set comprises of a

control unit, a high-voltage unit, cables, and canvas carrying bags. Refer to the

Specifications section for a list of included accessories.

Tests are made by measuring the capacitance and dissipation factor (power

factor) of a specimen. The values measured will change when undesirable

conditions exist, such as moisture on or in the insulation; presence of conductive

contaminants in insulating oil, gas or solids; presence of internal partial

discharges etc.

The test set measures insulation properties in high-voltage power equipment

such as transformers, bushings, rotating machines, cables, circuit breakers,

capacitors, surge (lightning) arresters etc. In addition the test set can also measure

transformer excitation current and transformer turns ratio (with optional TTR

capacitor).

Delta4000 makes all standard Ungrounded Specimen Tests (UST) and Grounded

Specimen Tests (GST) on high-voltage apparatus and key features include:

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Delta 4000 Instruction Manual Page 9