Overview

The SC(ZB) series 10kV class epoxy resin cast dry-type transformers are mainly used in power transmission and distribution systems as power transmission and distribution equipment. The series features low loss, low noise, low temperature rise, high reliability, as well as environmental protection, flame retardancy, explosion-proof performance, and maintenance-free operation. All performance indicators meet the advanced level of similar domestic products.

It is widely used in high-rise buildings, commercial centers, subways, airports, railway stations, industrial and mining enterprises, drilling platforms, oil production platforms and other places. It can also be combined with switch cabinets to form a packaged substation.

Operating Environmental Conditions

1. Ambient air temperature: Upper limit +40℃, lower limit -30℃.

2. Altitude: ≤ 1000m (Note: If the altitude exceeds 1000m, please specify detailed requirements when placing an order).

3. Wind pressure: Not exceeding 700Pa (equivalent to wind speed of 34m/s).

4. Seismic intensity: Not exceeding Level 8.

5. Pollution class: Class IV.

6. Maximum daily temperature difference: Not exceeding 25℃.

7. Installation site: Free of flammable materials, explosion hazards, chemical corrosion and severe vibration.

8. Installation type: Outdoor / Indoor type.

Applicable Standards

GB1094.1-2007 Dry-Type Power Transformers

GB/T10228-2008 Technical Parameters and Requirements for Dry-Type Power Transformers

GB/T17211-1998 Guide for Loading of Dry-Type Power Transformers

GB1094.3-2003 Power Transformers - Part 3: Insulation Levels, Dielectric Tests and External Clearances in Air

JB/T10088-2004 Sound Levels for 6kV~500kV Power Transformers

JB/T56009-1998 Quality Grading for Dry-Type Power Transformers

Main Features

Safe, fireproof and pollution-free, can be directly operated in the load center.

High mechanical strength, strong short-circuit resistance, low partial discharge, good thermal stability, high reliability and long service life.

Low loss and low noise, with obvious energy-saving effect.

Good heat dissipation performance, strong overload operation capability, and capacity can be increased when forced air cooling is applied.

Good moisture resistance, suitable for operation in high temperature and other harsh environments.

Environmentally friendly, flame retardant, explosion-proof and maintenance-free.

Small size and light weight.

Model Meaning

Structural Features

The low-voltage winding of the epoxy resin cast dry-type transformer adopts a foil-wound structure, made of high-quality imported copper foil. The high-voltage winding has a “tapered” layered structure, formed by vacuum epoxy casting, with low inter-layer voltage and strong overvoltage withstand capability.

The core of the epoxy resin cast dry-type transformer is made of high-quality imported cold-rolled grain-oriented silicon steel sheets, processed on an automatic core cutting line with a 45° full-mitre joint structure. The core limbs are bound with a special binding process, and the core surface is coated with a special anti-rust paint, which provides moisture and corrosion resistance while effectively reducing noise.

Class H Insulation High-Voltage Coil

The coil is wound with NOMEX paper-covered flat copper wire, featuring a continuous structure with high mechanical strength and good heat dissipation. It is then impregnated multiple times with a specially formulated Class H insulating varnish using VPI vacuum pressure equipment and baked and cured multiple times.

Low-Voltage Coil

The low-voltage coil is primarily foil-wound, with internal welding performed on the winding machine using argon shielded welding. This results in high precision, low welding resistance, and eliminates external welding processes.

German DMD insulation material is used between winding layers. After winding, the ends are sealed and cured with resin, which not only solves the coil ampere-turn unbalance problem but also effectively improves heat dissipation and enhances the transformer’s short-circuit withstand capability.

10kV Class SC(B)9 Series Dry-Type Distribution Transformer Technical Parameters

10kV Class SG(B)9 Series Dry-Type Distribution Transformer Technical Parameters