Telecom Consultants & Construction Co.

Reliable and cost effective HV Line Voltmeter/Line Phasing Device

Energy distribution companies as well as medium and high voltage consumers such as heavy industries often have to parallel two HV sources to take care of requisite loads. This requires a reliable and safe instrument to check the line voltage and phase identification of the sources. Line Phase Detector LPD can be used for indoor and outdoor applications for the same with absolutely safe working conditions.

Design Features

The system consists of two high impedance probes, extension rod A with provision for fixing the indicating device, extension rod B with provision for interconnection with the indicating device, two earth cables with earth clamps. The high impedance probes can be connected to the extension rods in straight or right angle positions depending upon the convenience of use.

A resistor divider network in series with each high impedance

probe produces low voltage drop across it that is used for

indicating the phase to earth or phase to phase voltage measurements

Safety Features

Line Phase Detector LPD has all the safety features necessary to safeguard the operator during high voltage testing. Probe tester is provided with the kit to ensure proper resistance and insulation ofthe same before the commencement of the test.

Suitable safety devices have been incorporated in the circuit to bypass excessive voltage across the indicating device and in turn the operator.

Two sets of suitable safety hand gloves have been provided for safe working condition

Operation

When high impedance probe with indicating device is touched to a live phase, the line voltage is indicated on the meter. This is repeated for each phase of the two lines, before proceeding for phase identification tests.

Configuration

The kits are available in the following configurations:

a) Dedicated Unit: suitable for particular system voltage, such as 6.6 /11/22/33 kV

b) Versatile Unit : kit containing pairs of high impedance probes for line voltages ranging from 6.6 kV 33 kV

High Impedance probes

250 mm/400 mm, Fiberglass tubes 16 mm/ 25 mm diameter Weight: 130gm/200gm Qty: 2 nos.

Extension rods with earth cable

Rod A and B:1200mm each, Fiberglass tubes 16 mm/25mm with earth cable 5 meter length and earth clamp

Probe tester

Battery operated 500/1000 V DC insulation tester Dimensions: 145 (H) x 95 (W) x 57 (D) mm Weight: 400 gm including batteries Qty: 1 no.

Safety hand gloves

Two sets of safety hand gloves of 33 kV working grade are provided as standard accessories with the kit.

Customer service

All instruments have been designed based on safety, capability, field application, ruggedness and ease of operations. We try to offer the best possible solution for the job. We not only offer our after sales services to the customers through our branches/authorized agents, but also offer training to the working staff of the customer under specialized training programs.