The peculiarities of interruption of the medium voltage motors by VCB with CuCr contacts [vacuum circuit breakers]

Chaly, A.M.; Chalaya, A.T.; Poluyanov, V.N.; Poluyanova, Irina N.

doi:10.1109/deiv.1998.738628

Cited by 3 publications

(2 citation statements)

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“…An SSASD system (high power factor and power electronic soft switching) can avoid these overvoltages during startup and switching; therefore, the life of the motor may be prolonged. Motors with a high voltage (e.g., 10 kV versus 6 kV), high power (e.g., 3 MW versus 200 kW), and fairly long cable distance (e.g., 800 m) may present a dangerous combination for overvoltages [19]. This combination is also typical for an ideal SSASD application, which increases its feasibility.…”

Section: Motor Stator Winding Insulation Damage and Protectionmentioning

confidence: 99%

“…This combination is also typical for an ideal SSASD application, which increases its feasibility. It is shown in [19] that larger motors (typically above 1 MW) do not experience significant overvoltages following interruptions in the running mode. Surge arrestors or suppressors are, therefore, not required.…”

Section: Motor Stator Winding Insulation Damage and Protectionmentioning

confidence: 99%

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The soft starters

Endrejat

Pillay

2008

IEEE Ind. Appl. Mag.

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ARGE PUMPS AND COMPRESSORS IN THE MEGA-watt range are often required by the petrochemical industry. The associated motors are often large enough for soft starting or may also be so large to dictate the requirement of soft starting. Soft starting may also be required because of the nature of the process or the driven equipment. Direct online (DOL) starting results in the severe transients in the machine and associated power system, which can be avoided by soft starting. One or more large drives in a process plant can often benefit from the adjustable-speed operation for improved process control or energy savings. The reliability of the process is, however, extremely important because outages frequently result in major production or financial losses. Therefore, a reliable, flexible, safe, and cost-effective system is required.

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Section: Motor Stator Winding Insulation Damage and Protectionmentioning

confidence: 99%

Section: Motor Stator Winding Insulation Damage and Protectionmentioning

confidence: 99%