Results 221 to 230 of about 130,216 (261)

Pilot-wire protection of transmission lines

Electrical Engineering, 1960
THE PRESENT pilot-wire protective systems for transmission lines employing leased pilot-wire circuits are an outgrowth of conventional differential protective systems for other types of electric apparatus. Thus, these line-protective systems are characterized by the fact that the pilot wires are part of the differential connection between the current ...
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Anti-dazzling protection for Air Force pilots

SPIE Proceedings, 2012
Under certain conditions, laser directed at aircraft can be a hazard. The most likely scenario is when a bright visible laser causes distraction or temporary flash blindness to a pilot, during a critical phase of flight such as landing or takeoff. It is also possible, that a visible or invisible beam could cause permanent harm to a pilot's eyes.
Ariela Donval, Tali Fisher, Ofir Lipman, Moshe Oron   +3 more
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Pilot Backup Protection Based on Wireless Communication

2017 Ninth Annual IEEE Green Technologies Conference (GreenTech), 2017
The paper presents a back-up protection scheme for loop system from all types of fault based on the directional element. The traditional back-up protection schemes such as distance protection and overcurrent protection are not suitable for the loop system.
Zhenmin Tang, Qiushi Wang, George Karady
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Pilot Studies for Groundwater Protection in Czechoslovakia

1981
Abstract Pilot studies have been carried out as a part of Hydrocarbon Pollution Prevention Project in the years 1977 to 1980. Section of Mesozoic basin, with overall resources exceeding 6000 1 pro sec. has been selected. Groundwater is bound to sandstones with shallow unconfined aquifer.
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Customized Pilot Cervical Spine Protection Orthosis Development

Proceedings of the Vertical Flight Society 80th Annual Forum and Technology Display
Pilots and crew of rotary-wing aircraft can be exposed to inertial and task position stressors that generate pain. Repeated painful exposures with or without tissue damage are precursors to pain sensitization and chronic pain. Chronic pain leads to reduced operational readiness and long-term medical treatment.
Isci, H., Gezegen, D., Şendur, Polat, Ünal, Ramazan, Heidari, Nima   +4 more
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Pilot protection

IEEE Industry Applications Magazine, 2009
Richard Hunt, Mark Adamiak, Al King, Steel McCreery   +3 more
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Pilot Project on Rehabilitation and Protection of Tugai Forests

SPE International Conference on Health, Safety, and Environment in Oil and Gas Exploration and Production, 2008
Abstract Tugai forests are a threatened ecosystem in Azerbaijan. These forests currently occupy approximately 18,000 Ha, less than 10% of the extent of just a few decades past. A first of its kind in Azerbaijan, BP's Regional Biodiversity project established a sustainable model for the rehabilitation and protection of this national ...
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Pilot protection of lines emanating from DFIG-based wind farms during balanced faults

International Journal of Electrical Power and Energy Systems, 2023
Xu Li, Yuping Lu
exaly  

A novel directional pilot protection independent of line parameters and boundary elements for MMC-HVDC grid

International Journal of Electrical Power and Energy Systems, 2023
Huijie Lyu, Jiawei He, Zhongrun Xie
exaly  

Directional pilot protection

2020
Bin Li, Jiali He, Yongli Li, Yuping Zheng   +3 more
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