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Description
Purpose and Application
VT is designed for:
- transmitting signal to instruments and protective, alarm or control devices;
- electricity metering;
- isolating secondary circuits from high voltage.
VT are made for boreal climate and tropical climate, and environment class 2 as per GOST 15150-69.
Operating Position - optional.
VT is manufactured as per Specification 0ET.591.001
Design
Support-type cast resin VT is a single-phase, three- or four-coil electromagnet induction unit with grounded X terminal of the primary coil.
Main secondary coil (or two main secondary coils, in case of 3NOL(P)-SVEL-35-4) is intended for electricity metering, while additional secondary coil – for safety, power supply of automation, control, alarm, and insulation monitoring.
HV terminal A of the primary coil is connected to the top surface of transformer. Secondary terminals and ground primary terminal X are located on the bottom part of cast unit. Secondary measuring terminals are sealed with a protective cap.
Design Features
Upon customer’s request, VT with reusable kick-off safety guard (SPUE-SVEL-10) is made as ЗNOLP-SVEL-35. Rated current – less than 0.5А. Also, ЗNOLP-SVEL-35 can be made with inverting HV terminal А.