Over 14 years of experience
in the Energy sector
Power Generation, Transmission and Distribution
About us
We are one of the leading manufacturers of voltage-free switches and butterfly valves and distributors of transformer accessories.
Recognized globally for the excellence and innovation of our products, SEI do Brasil is synonymous with efficient customer service. We offer a complete and diversified line of solutions for all stages of Energy Generation, Transmission and Distribution.
Epoxy bushing
Used in oil-insulated transformers and other areas, for connecting cables.
Produced in accordance with the EM 50181 and IEC 60137 standards, their insulation material is Epoxy resin that supports 90°C/115°C.
VOLTAGE
24kV and 36kV
CURRENT
250A to 630A
MATERIALS
Epoxy body, silver-plated contacts, electrolytic copper main busbar
ACCESSORIES
Protective cap, grounding cable, brass washer, brass nut, connecting ring.
Well Bushing
Used in oil-insulated transformers and other areas, for connecting cables.
VOLTAGE
21.1kV
CURRENT
200A
Loadbreak Switch
Load disconnect switch, 02 to 04 positions, three-phase.
VOLTAGE
38kV
frequency
60HZ
Max. coin rating
630A
MOMENTUM AND VOLATILITY
200kV
Pressure Relief Valve and 90° Bend
Tested for operating pressure and resealing;
Complete kit with accessories, washers and nuts included.
SIZE
1/4 - 1" - 2"
Butterfly valve
Different models available for screwing and welding.
Available in cast iron, steel or aluminum.
Leak-proof models with optional “O” ring on flap.
Wheels
Our wheels are made of cast iron, where the models support from 2.5T to 10T per wheel, and can be used in oil or dry transformers.
In addition to standard models, we also offer custom wheel options to meet specific project needs.
Flanged models are available for applications that require greater precision and support, ensuring flexibility and efficiency for different system configurations.
125MM
2.5T per wheel
160MM
3.5T per wheel
200MM
7T per wheel
200MM
10T per wheel
Amorim Cork
Transmission and Distribution sector.
Amorim Cork Composites has been developing materials and gaskets for the transformer sector for the last four decades.
Amorim T&D is the brand of products specially designed and tested for the energy transmission and distribution market, providing this sector with innovative Sealing and Noise and Vibration Control solutions.
T&D products are performance-driven and recognized worldwide, with a long history of use in transformers, reactors, insulators and other T&D components.
Main Advantages:
Sealing;
Noise and Vibration Control.
Thermometers
Bimetallic thermometer for vertical mounting
All stainless steel body, accuracy within +/- 2% of Full scale, Maximum Pointer, Individually Calibrated and optional Brass Well.
Bimetallic thermometer for horizontal mounting
Available in NPT/NPS/BSP threads, all stainless steel body, Individually calibrated with +/- 2% accuracy and Maximum Pointer.
Bimetallic contact thermometer
Available in 0-120°C, 0-150°C scale, Single or double switch, Maximum pointer, Horizontal or vertical installation, Thread size G 1/2", 3/4" and 1".
DMCR / Integrated Relay
Measurement of temperature, oil and gas level. Consult technical specifications with sales.
Oil level indicator and display
Designed to monitor the level and temperature of the operating fluid simultaneously, the indicators have a 100% mechanical mechanism that ensures precise operation and high consistency. As a differential, models with an oil level display are available, allowing a practical and immediate reading of the level. The float is suitable for transformer oil, ensuring reliability and durability.
Solutions for Transformer Manufacturers - OEMs
Rotary Switches for Distribution
The V1R type switches were designed for medium voltage systems, with a nominal voltage of 36kV and a nominal current of 60A. Developed for no-load operations, they were tested at LAPEM (2015) and comply with IEC 60214, ANSI IEEE 386-2066 and NBR 5440 standards. Their robust construction and flexible design ensure safety, efficiency and easy integration into various electrical projects.
V1N – CST Linear Type
Used in transformer configurations, designed to offer safety and efficiency in high voltage environments. It has a bridge-type configuration, adaptable to different connection positions.
VOLTAGE
Up to 36kV
CURRENT
POSITIONS
120A
2 to 7
Settings
Bridge
V2N – Bridge
Ideal for medium voltage transformers with bridge configuration, providing versatility at different current levels. Developed for applications that require robustness and reliability.
VOLTAGE
15kV, 25kV and 36kV
CURRENT
POSITIONS
160A and 200A
2 to 7
Settings
Bridge
V2NSP – Parallel Series
Switch designed to support series-parallel configurations, used in systems that demand high flexibility in current and voltage.
VOLTAGE
15kV, 25kV and 36kV
CURRENT
160A and 200A
Position
2
Settings
Series-Parallel
V3N – Bridge
Developed for higher power applications, with a wide range of current and voltage, ideal for transformers in substations.
VOLTAGE
15kV, 25kV, 36kV and 72kV
CURRENT
200A to 600A
POSITIONS
2 to 6
Settings
Bridge
V3NSP
Series-parallel version with greater support capacity, ideal for high-demand industrial applications.
VOLTAGE
15kV, 25kV, 36kV and 72kV
CURRENT
200A to 600A
Position
2 a 6
Settings
Series-Parallel
V3N(G)SP - Parallel Series
Series-parallel version with greater support capacity, ideal for high-demand industrial applications.
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VOLTAGE
15kV, 25kV, 36kV and 72kV
CURRENT
200A to 600A
Position
2
Settings
Series-Parallel
V4N – Bridge
Designed for use in high performance transformers, allowing a greater number of positions and installation flexibility.
VOLTAGE
15kV, 25kV, 36kV and 72kV
CURRENT
200A to 600A
POSITIONS
2 to 14
Settings
Bridge
V4NSP – Series-Parallel
Series-parallel switch for use in high power transformers, designed to ensure safety and stability.
VOLTAGE
15kV, 25kV, 36kV and 72kV
CURRENT
200A to 600A
Position
2
Settings
Series-Parallel
V4D - Common Point
Compatible with voltages up to 72kV and currents between 200A and 600A, offering a robust and reliable solution for high-demand environments.
VOLTAGE
15kV, 25kV, 36kV and 72kV
CURRENT
200A to 600A
Position
2 to 14
Settings
Common Point
V5N – Bridge / Delta Star
Ideal for larger power transformers with support for bridge and star delta configurations, offering flexibility for various applications.
VOLTAGE
100kV, 123kV, 145kV and 170kV
CURRENT
300A to 600A
POSITIONS
2 to 14
Settings
Bridge, Delta Star
V5D – Common Output
Common output configuration, allowing flexibility and safety in high voltage transformers.
VOLTAGE
100kV, 123kV, 145kV and 170kV
CURRENT
300A to 600A
POSITIONS
2 to 14
Settings
Common output
V6N – Common Point
Designed for high voltage and current applications, allowing multiple positions and configured for common point.
VOLTAGE
15kV, 25 kV, 36 kV, 72 kV, 100 kV, 123 kV, 145 kV, 170 kV y 245kV
CURRENT
200A a 2000A
POSITIONS
2 to 14
Settings
Bridge, Common point
V6NSP – Series-Parallel / Delta-Star
Series-parallel configuration with additional support for delta-wye, adaptable to a variety of applications.
VOLTAGE
15kV, 25 kV, 36 kV, 72 kV, 100 kV, 123 kV, 145 kV, 170 kV y 245kV
CURRENT
200A a 2000A
POSITIONS
2 to 14 (or more)
Settings
Series-Parallel, Delta-Star
V7D – Common Point
Common point configuration to support high voltage operations, with a focus on stability and safety.
VOLTAGE
100kV, 123kV, 145kV, 170kV, 245kV and 345kV
CURRENT
300A to 2000A
POSITIONS
2 to 14 (or more)
Settings
Common point
V3N(G) - Bridge
The V3N(G) bridge is ideal for medium and high voltage systems, designed to meet specific configurations with high efficiency. It supports nominal voltages from 15kV to 72kV and currents from 200A to 600A, ensuring reliable and robust performance. With up to 9 positions available, it easily adapts to various applications, delivering versatility and durability.
VOLTAGE
15kV, 25kV, 36kV and 72kV
CURRENT
200A to 600A
Position
7 to 9
Settings
Bridge
V7R – Bridge
The V7R bridge is designed for high voltage systems, offering reliability and versatility for a variety of applications. With nominal voltages ranging from 100kV to 345kV, and currents from 300A to 2000A, it is ideal for demanding industrial environments. Its configuration allows up to 14 positions (or more), ensuring flexibility and efficiency in complex projects.
VOLTAGE
100kV, 123kV, 145kV, 170kV, 245kV and 345kV
CURRENT
300A to 2000A
POSITIONS
2 to 14 (or more)
Settings
Bridge
V7R – Reconnection / Star-Delta
Switch with reclosing functionality, adaptable to star-delta configurations for high power systems.
VOLTAGE
100kV, 123kV, 145kV, 170kV, 245kV and 345kV
CURRENT
300A to 2000A
POSITIONS
2 (or more)
Settings
Reconnection, star-delta
Drives
CSTs are designed for installation in any part of the tank or on the transformer cover, with their drive flywheel located internally or externally to the tank, providing flexibility to meet specific requirements.
U & I
For energy companies, industry and renewable energy generators
Power Quality and Reactive Compensation
Power Factor Correction
Harmonic Filter
Capacitors
Reactors
Measuring Transformers
Disconnecting Switches
Circuit breakers
Metal Structures
VOLTAGE
15kV, 25kV, 36kV, 69kV and 145kV
CURRENT
Up to 1250A
ACTIVATION
Motorized
BASE
Galvanized Steel
Solutions for Transformer Manufacturers - OEMs
Disconnecting switches
Our products are designed and tested according to IEEE, IEC, NBR and other standards. Applications include substations and medium/high voltage networks.
High conductivity aluminum or copper terminals
Highly conductive and mechanically resistant aluminum or copper sheet
High conductivity contacts in copper, silver or aluminum with tin plating
Resin insulators for outdoor use with high mechanical resistance
Safety lock against opening
Hot stick operability for operations under
Grounding connector
Vertical or horizontal mounting