Oil Immersed Circuit Breaker

An oil-immersed circuit breaker uses oil for insulation and arc extinction to protect electrical systems from faults.

Overview

Transguard’s low-voltage Oil Immersed Circuit Breaker is the core component of CSP (Completely Self Protected) Technology.

It ensures completely self protection for distribution transformers by safeguarding against overcurrent, overloads, fault currents, and earth faults.

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Types Available

Single Phase 1-Pole

5 kVA to 100 kVA

Current Rating: 20 Amps to 420 Amps

Single Phase 2-Pole

5 kVA to 100 kVA

Current Rating: 20 Amps to 420 Amps

Three Phase 3-Pole

16 kVA to 315 kVA

Current Rating: 20 Amps to 420 Amps

Key Differentiators

Reliable Tripping with Optimized Resistance Values

High-Quality Tripping & Resetting Mechanism

Meets Indian & Global Standards

Global Presence in 15+ Countries

Supplied Over 2.5 Million Units Globally

Key Features

Tripping Mechanism

Thermal Tripping : Bi-metallic strips react to transformer oil temperature and load current, ensuring accurate thermal modeling and protection.

Magnetic Tripping : Increases opening speed under high fault current conditions for efficient fault interruption.

CSP Technology

Completely Self-Protected Design : Protects transformers from lightning, secondary faults, overloads, and abnormal loading.

Reduces maintenance and operating challenges associated with conventional transformers.

Mitigates outages and transformer failures, offering cost-effective and reliable solutions.

Internal Oil Immersed Circuit Breaker

Internal Oil Immersed Circuit Breaker:

This circuit breaker is strategically mounted inside the transformer tank, connecting the secondary winding and secondary bushing.

It serves as a vital protective component, designed to interrupt the flow of current during secondary faults and overload conditions.

By being immersed in transformer oil, it benefits from enhanced cooling and insulation, enabling it to handle high fault currents effectively while extending its operational life.

Its placement inside the transformer ensures compactness and eliminates the need for external protective devices, making it an integral part of the CSP system.

Load Management Signal Light

This external indicator is mounted on the transformer tank near the operating handle of the circuit breaker.

It provides a clear and immediate visual alert for abnormal loading conditions, such as overload or impending faults.

Connected to an internal sensing circuit, the signal light offers utility personnel a quick way to assess transformer load status without complex diagnostic tools.

This feature helps prevent further damage by prompting timely action to address the abnormal conditions.

Operating Handle

Located on the transformer exterior for easy access, the operating handle allows for manual operation of the circuit breaker.

It includes a resetting mechanism that enables utility personnel to restore the breaker to its functional state after a tripping event.

Designed for user safety and convenience, the handle ensures that circuit breaker operation can be performed without requiring specialized tools or opening the transformer tank.

The ergonomic design and secure positioning enhance operational efficiency, even under field conditions.

HT Fuse

The high-tension (HT) fuse is mounted internally within the transformer, positioned between the incoming high-voltage lead and the primary winding of the transformer

It acts as a crucial overcurrent protection device, safeguarding the transformer by isolating it from the network during fault conditions or excessive current flow.

This fuse is designed to protect the transformer from severe damage caused by lightning strikes, short circuits, or other high-current events.

Its integration into the transformer reduces the need for additional external protection devices, simplifying the overall design and lowering installation costs

Internal Oil Immersed Circuit Breaker

Internal Oil Immersed Circuit Breaker:

This circuit breaker is strategically mounted inside the transformer tank, connecting the secondary winding and secondary bushing.

It serves as a vital protective component, designed to interrupt the flow of current during secondary faults and overload conditions.

By being immersed in transformer oil, it benefits from enhanced cooling and insulation, enabling it to handle high fault currents effectively while extending its operational life.

Its placement inside the transformer ensures compactness and eliminates the need for external protective devices, making it an integral part of the CSP system.

Load Management Signal Light

This external indicator is mounted on the transformer tank near the operating handle of the circuit breaker.

It provides a clear and immediate visual alert for abnormal loading conditions, such as overload or impending faults.

Connected to an internal sensing circuit, the signal light offers utility personnel a quick way to assess transformer load status without complex diagnostic tools.

This feature helps prevent further damage by prompting timely action to address the abnormal conditions.

Operating Handle

Located on the transformer exterior for easy access, the operating handle allows for manual operation of the circuit breaker.

It includes a resetting mechanism that enables utility personnel to restore the breaker to its functional state after a tripping event.

Designed for user safety and convenience, the handle ensures that circuit breaker operation can be performed without requiring specialized tools or opening the transformer tank.

The ergonomic design and secure positioning enhance operational efficiency, even under field conditions.

HT Fuse

The high-tension (HT) fuse is mounted internally within the transformer, positioned between the incoming high-voltage lead and the primary winding of the transformer

It acts as a crucial overcurrent protection device, safeguarding the transformer by isolating it from the network during fault conditions or excessive current flow.

This fuse is designed to protect the transformer from severe damage caused by lightning strikes, short circuits, or other high-current events.

Its integration into the transformer reduces the need for additional external protection devices, simplifying the overall design and lowering installation costs

Major Customers

Proven Performance
Extensive Reach:
Transguard has successfully supplied over 2 million breakers across India and to over 15 countries globally, showcasing our capability to meet large-scale demands with precision and efficiency.

Reliable and Efficient Products:
Our breakers have consistently delivered exceptional reliability and operational efficiency across a wide range of utility networks, including those operating under challenging environmental and load conditions.

Validated Engineering Expertise:
Rigorous field testing and the long-term success of our installations in various geographies stand as a testament to our engineering excellence and commitment to quality.
Compliance with Stringent Standards
Adherence to national and international standards, including IS, IEC, and utility-specific guidelines, ensures the highest quality and safety.

Regular upgrades and customizations align our offerings with evolving utility requirements.
Customizable Solutions
Ability to design and manufacture products tailored to meet the unique operational needs of each utility.

Options for smart grid compatibility, remote monitoring, and integration with advanced SCADA systems.
Robust Manufacturing and R&D Capabilities
State-of-the-art manufacturing facilities and a dedicated R&D team enable the production of advanced switchgear and related products.

Focus on innovation and reliability ensures our solutions remain at the forefront of the industry

Comprehensive After-Sales Support
We offer end-to-end support, including installation, commissioning, maintenance, and training, fostering long-term partnerships with utilities.

Rapid response teams and a network of service centers ensure minimal downtime for our clients.
Sustainability and Energy Efficiency
Our products are designed with energy efficiency in mind, helping utilities reduce operational costs and environmental impact.

Commitment to sustainable manufacturing practices further strengthens our appeal to environmentally conscious stakeholders
Proven Track Record with Leading Utilities
Successful implementations across major state utilities highlight our ability to handle high-stakes projects with precision and efficiency.

Repeated approvals reflect trust in our ability to deliver consistent quality and performance.

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