Advanced measuring solutions for electrical maintenance and safety

In these days of continuous advancements where continuity and precision have become so important, one cannot afford to experience a shut down or higher maintenance lead time as it directly infects the overall governing of the system. And if that malfunction comes in the form of an electrical breakdown, the results can be more adverse. Be it any facility or set up, electrical maintenance is paramount.

Testo thermal imagers are an ideal partner for efficient maintenance. Thermography is the time- and cost-saving method for non-contact detection and analysis of thermal anomalies during any electrical maintenance. In electrical installations or cables, increased temperatures are always an indication of an overload, an imminent malfunction or an existing defect. Thermal Imagers can be used to understand and eradicate issues such as:

• Regular checks in electrical maintenance
• Safe temperature measurement and heat status evaluation
• Early detection of defective components or connections
• Minimise dangerous fire risks and prevent costly production downtime

Example: Evaluation of the heat status of low, medium and high-voltage systems
As an integral part of electrical supply networks, high-voltage plants such as substations must ensure as uninterrupted a supply of electricity as possible due to the high availability of their electrical systems. A malfunction or interruption of the electrical grid is often preceded by thermal warming caused by electrical resistance.

The challenge.
Most symptoms of wear, material fatigue or cable rupture in the transmission of electrical current are preceded by thermal warming due to increased resistance. If this resistance becomes too high, the heat development destroys the component, with the possible result of a power cut.

A further challenge lies in the cooling oil of the transformers. Due to eroded insulation, slurry can occur here, which is deposited in the cooling ribs. The blockage of the through flow in the affected cooling ribs initially compromises the cooling, and in the worst case can result in the failure of the complete cooling function of the transformer.

The solution.
The objectiveof maintenance work is to obtain an overview of the switchgear which is comprehensive as well as detailed – including all circuit breakers and power switches, converters, insulators, screw fittings, cables or other connections. With the high-resolution thermal images, these sources of malfunction can be quickly and precisely identified before they become serious problems, endangering the reliability of supply.

Testo Thermal imagers facilitate evaluation of the heat status of low, medium and high-voltage systems. This prevents dangerous fire risks and costly production downtimes.

Low Voltage Systems:
Switch cabinets
The technology of thermography is particularly useful in the maintenance of switch cabinets, as the measurements can be carried out non-contact and at a safe distance. Anomalies can therefore be detected and countermeasures can be easily implemented.

The Site Recognition technology from Testo also supports efficient and reliable inspection routing for lots of similar switch cabinets. The thermal imager automatically detects the measuring location and stores the measured thermal images in defined folders.

Electrical components
In the case of electrical components, heat distribution within the individual components is also significant, as well as the connections and access lines. Different temperatures within maintenance indicate the operating status, but can also be indicative of a malfunction.

Medium Voltage Systems:
Transformers
Depending on the type of insulation, the connections, cores or insulation in components of medium-voltage installations such as transformers can be inspected for thermal irregularities.

High Voltage Systems:
Overhead power lines
The electrical connection points and insulators for overhead power lines in substations or the overhead power lines of high-voltage systems can be checked for maintenance purposes. Typically, these locations are difficult to access, also anomalies, like hotspots, are not visible.

Testo Electrical Measuring Instruments is yet another set of equipment that enables any engineer or technician to curb down any sort of electrical disorder. Thanks to innovative technologies and simplified application, the Testo measuring instruments measure electrical parameters more reliably and precisely than ever before. The status of all electrical plants and equipment can be tested reliably and highly efficiently.

This complete set comes in a portable kit with testo 745 non-contact voltage tester with a voltage range of up to 1,000 V AC is particularly well-suited to fast initial checking of any suspected fault sources. It is available with a filter and is used for high-frequency interference.

• Adjustable sensitivity
• Visual and acoustic signal
• Waterproof and dustproof according to IP 67
• Measuring point illumination

Testo 750 Voltage tester is with patented all-round LED display for visibility from all sides. They have the most essential functions for voltage testing, continuity testing and rotating magnetic field measurement.

• Clear, patented all-round LED display
• Fibre-optic technology for optimum voltage indication
• Anti-slip ring for secure grip
• Ergonomic handle shape
• Measuring point illumination

Testo 755 voltage and current tester is the first of its kind which meet the latest standard and which can also measure current. It can determine voltage/de-energisation, for measuring current and resistance, as well as for continuity tests. In addition, the integrated torch enables dark spots to be illuminated.

Automatic measurement parameter detection

• Certified according to voltage tester standard
• Measurement result without any switching on or selection
• Measuring point illumination
• Exchangeable measuring tips

Testo 760 multimeter is the first digital multimeter with automatic detection of measurement parameters and selection via socket assignment. Function keys replace the traditional dial on all three instruments, which means easier operation and greater reliability.

• Easy, modern operation with function keys instead of a dial
• Measurement parameter detection and selection via the socket assignment
• Prevents incorrect settings
• True root mean square measurement – TRMS
• Large, backlit display

Testo 770 Clamp meteris ideally suited for current measurement in switching cabinets. It has a unique grab mechanism for easy and safe work and automatic measurement parameter detection also ensures reliable work. It also measures multiple parameters like, power factor, resistance, voltage etc very easily.

• Unique grab mechanism makes it easier to work at tight measuring points
• Auto AC/DC for current and voltage
• Large two-line display
• True root mean square measurement – TRMS
• With additional functions, such as starting current, power and μA measurement
• T 770-3 also works on Bluetooth and testo Smart Probes App

It has also been proven that an efficient and healthy electrical facility can improve total performance of any industrial, residential or commercial application. Testo provides you with the best solutions and products that not only measure the necessary parameters but also ensure longevity and minimises colossal damages. Now Be Sure with testo.

For more info:
Write to info@testo.in
Visit: www.testo.com