SPECTROPHOTOMETER FOR COLOR MEASUREMENT IN PLASTICS

The function of a high-speed spectrophotometer

The function of a high-speed spectrophotometer

These spectrometers work across a broad spectral range (UV-VIS – NIR – SWIR) and are designed to maximize the probe light throughput in HELIOS and EOS spectrometers. This is where the high-speed versions of our spectrometer systems come into play, offering reliable and high-quality measurement results at even extremely high measuring rates. Spectrophotometry is a method to measure how much a chemical substance absorbs light by measuring the intensity of light as a beam of light passes through sample solution.

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Relay Protection Vector Measurement

Relay Protection Vector Measurement

This paper studies vector surge estimation methods of four different commercial relays. Simulations of frequency and rate of change of frequency (ROCOF) variations, phase angle changes, islandings, short-circuits, and transmission events. The recently reported occurrences showed the spurious tripping of DG has been caused due to sensitive LoM settings, mainly by vector surge (VS, 78VS or vector jump) and ROCOF (81R) functions ,. 1547-2018 recommended ride-through requirements for which the LoM protection must ride-through during. The 78VS principle of operation is based on the phase displacement of voltage measured in the terminals of a synchronous generator operating in parallel with the grid when unintentional islanding occurs. When there is a sudden disconnection of the generator and the grid, the frequency accelerates (or decelerates) based on the power imbalance at the.

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Grounding resistance measurement of construction site power distribution box

Grounding resistance measurement of construction site power distribution box

This Grounding Standard describes factors affecting the ground resistance and the method of measuring ground resistance of Distribution installations. This helps to reduce the potential difference that exists between conductive parts and the earth. Where continuity of service is a high priority, high-resistance grounding can add the safety of a grounded system while minimizing the risk of service interruptions due to grounds. Bonding ‐ The permanent joining of two metallic parts to form an electrically conductive path that ensures electrical continuity and the capacity to safely conduct any current likely to be imposed. Knowledge of the various types of system grounding and performance characteristics is critical when designing or operating an electrical system.

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