COMPARISON OF THE WEAR RESISTANCE «OLTC» WITH ARC BLOWOUT IN OIL AND IN VACUUM
Keywords:
Power transformer, on-load tap changer, traction supply system, contact network, voltage level, durability, traction substationAbstract
The article deals about On-Load Tap changers (OLTC), and about their need for use on the railway, efficiency, as well as their wear. The question is raised about their reliability when operating in automatic mode, based on the experience of operating the Gorky railway. The reasons for disabling automation on the section of the East Siberian Railway are considered.
Next, the article compares two main types of OLTC with different methods of arc blowout: in a vacuum chamber, and in the oil of the contactor tank. The device and features of the OLTC with a vacuum arc chamber are analyzed in more detail.
A comparison of reliability, namely the durability of operation of two types of RPN under normal operating conditions, is carried out. For this purpose, comparative graphs of the dependence of wear on the number of switches per day were constructed.
The conclusion evaluates two types of devices and provides possible prospects for increasing the reliability of OLTC devices in general.
