Pressurized Transformers (Ex p)
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Pressure-Controlled Power Solutions for High-Power ATEX Systems
The Pressurized (Ex p) protection concept prevents the ingress of explosive gases into the enclosure by maintaining a positive internal pressure using clean air or inert gas.
This method is widely used in high-power installations and containerized ATEX substations.
ESTA Ex p transformers are engineered with integrated pressure monitoring systems, sealed enclosures, and certification-compliant design.
Protection Concept: Ex e
The Ex e principle:
- Maintains positive pressure inside the enclosure
- Prevents explosive gas ingress
- Includes pressure monitoring and alarm system
- Provides safe shutdown functionality
This approach offers a safe and cost-effective solution for high-power hazardous area applications.
Electrical Scope
Power Range
500 kVA – 20 MVA
Voltage Level
400 V – 36 kV
Frequency
50 Hz / 60 Hz
Oil-immersed or dry-type options
Optional OLTC
Fully engineered-to-order integrated solutions.
Applications
Containerized ATEX substations
Skid-mounted power modules
Offshore process platforms
Refineries and petrochemical plants
High-power hazardous area distribution systems
Design Features
Pressure Control System
- Automatic pressure monitoring
- Alarm and interlock system
- Certified Ex p control panel
Sealed Enclosure
- Gas-tight construction
- Industrial sealing systems
Thermal & Mechanical Strength
- Designed for high-power applications
- Offshore-grade corrosion protection
Engineering Capability
ESTA provides:
- Pressure calculations
- Sealing engineering
- Thermal performance analysis
- Zone compliance engineering
- Certification documentation support
Each system is designed as an integrated solution according to the project requirements.
Certification & Standards
- ATEX 2014/34/EU
- IECEx
- EN 60079-0
- EN 60079-2
- IEC 60076
Certified according to zone classification and gas group requirements.