The parameter of tensile strength for transformer bushing insulating paper occupies an important position in the structural design and life evaluation bushing. In order to precisely achieve effect aging time moisture content on paper, samples with a thickness 0.13 mm were prepared dielectric testing under different contents states. results show that (MPa) decreases linearly range 0–648 h accele...

Abstract Failure of the transformer bushing will cause to be powered down or damaged, affecting safe operation power system. This paper proposes a method using system harmonics as dielectric response excitation source and studies insulation online detection technology based on transient characteristics. The technical scheme structure monitoring characteristics are given. A calculation model sho...

The electric field optimization minimizing the strength on an electrode surface and providing its uniformity is important in designing high voltage power transformer bushings other apparatus from viewpoint of efficient utilization space. bushing with cylinder system has been designed tested this investigation. It was found that insulation method most factor to lower streamer initiation voltage....

Bearing bushing parts are used to support other rotating moving parts. When these bearing bushings made of bronze, their inner cylindrical surfaces can be finished by turning. The problem addressed in this paper was that identifying an alternative for finishing turning the taking into account specific sustainability requirements. Three alternatives have been identified. selection ensures highes...

Major issues of NBI power supplies are a high-speed switching, regulation and transmission of dc ultra high voltage, and suppression of surge energy input to the beam source at breakdown. A GTO(gate turn off thyristor) inverter type power supply where the control is performed at low voltage ac side was designed for the ITER NB. Based on the remarkable progress of a high power IEGT (injection en...

In order to estimate the forces transmitted onto the cabin in a running vehicle, we need to have proper dynamic models for the vibration isolation components such as rubber bushings. Typically the conventional Voigt model is used in commercial programs. However, this model has limitations in reflection of the frequency dependent characteristics of the vibration isolation components. In this pap...

In this article, the dynamic thermal rating assessment method of oil-immersed power transformer with multiple operating conditions is proposed, considering constraints hot spot temperature (HST), top oil temperature, losses life and maximum allowable current on-load tap changer (OLTC) or bushing, which can determine load curves under different give most sensitive to limit capacity. To improve a...

Abstract: This paper presents an in-wheel vibration absorber for in-wheel-motor electric vehicles (IWM EVs), and a corresponding control strategy to improve vehicle ride comfort. The proposed in-wheel vibration absorber, designed for suppressing the motor vibrations, is composed of a spring, an annular rubber bushing, and a controllable damper. The parameters of the in-wheel spring and rubber b...

Considering the number of failures in high voltage power transformers caused by problems in bushing and winding insulation, it is important to study means for diagnosing incipient failures, to avoid long unavailability periods and its consequences. The aim of this work is to study detection and measurement procedures, concerning the evaluation of position of partial discharge inside the transfo...