1. Overview

This type of voltage transformer is cast using epoxy resin and is a pillar-type fully enclosed structure. It is suitable for use in power systems with a rated frequency of 50Hz and a rated voltage of 6kV and 10kV for voltage, power measurement and relay protection. When the transformer is excitated at a rated voltage, it can withstand an external short circuit of 1 second without damage, and is suitable for use in various high-voltage switch cabinets.

2. Model and meaning

3. Structure introduction

This type of transformer is fully enclosed. The iron core is made of high-quality cold-rolled silicon steel sheets and is strictly heat treated. The iron core is poured with epoxy resin together with the primary and secondary windings. The product has good foul-resistant and moisture resistance.

4. Technical data

1.GB/T 20840.1-2010 "Transformers Part 1: General Technical Requirements"

2.GB/T 20840.3-2013 "Supplementary Technical Requirements for Transformers Part 3 Electromagnetic Voltage Transformers"

3. Insulation level: 12/42/75kV

4. The product surface creepage ratio meets the level II filth level;

5. Load power factor: cosФ=0.8 (hysteresis);

6. Frequency: 50Hz or 60Hz.

7. Ambient atmospheric temperature: -5~+40℃ average temperature 30℃;

8. Relative temperature ≤85% (20℃);

9. Altitude ≤1000m;

10. Other technical parameters are shown in the table below

5. Wiring diagram

6. Appearance and installation dimension drawings

7. Ordering instructions

1. Voltage ratio

2. Rated secondary load

3. Accurate series

8. Things to note

1. After wiring, check whether all wiring is correct, especially short connections cannot be formed between the voltage secondary outlets a-b.

2. The base ground terminal must be grounded on the site, and the transformer secondary outlet is reliably connected to ground according to regulations. Please note that the double-variable voltage secondary terminals a and b cannot be grounded at the same time.

3. The primary line installation A must be the incoming side and B is the outgoing side.

4. Pay attention to protecting the terminal board and umbrella group during handling and hoisting. It is strictly forbidden to directly lift or transport the transformer terminal board and umbrella group.