Wetown provides isolated phase bus systems for generator outlet circuits in medium- and large-capacity power plants. Our IPB solutions are designed for reliable power transmission between the generator and the main transformer, while also supporting branch connections to auxiliary transformers, excitation transformers, PT cabinets, and other related equipment.
What Is Isolated Phase Bus?
Isolated phase bus, often abbreviated as IPB, is a type of metal-enclosed bus system in which each phase conductor is housed in its own individual metallic enclosure. It is widely used in power plants for high-current connections between generators and transformers.
Typical Applications
- Generator to main transformer connections
- Generator to unit auxiliary transformer connections
- Generator to excitation transformer connections
- PT and lightning arrester branch circuits
- Medium- and large-capacity thermal power plants
- Hydropower and other utility power projects
Key Features
High current capacity
Wetown IPB systems are designed for demanding generator outlet applications and can support a wide range of current ratings for different project scales.
Excellent electromagnetic shielding
Each phase is enclosed separately, which helps reduce electromagnetic effects outside the enclosure and improves the thermal performance of surrounding steel structures.
Reliable enclosure protection
The enclosure is designed for harsh environments and can achieve IP65 protection, making it suitable for outdoor installation and challenging site conditions.
Intelligent monitoring integration
The system can be equipped with monitoring units for temperature, humidity, pressure, leakage, and other key operating conditions.
Anti-condensation protection
Wetown can provide air circulation drying and micro-positive pressure solutions to reduce the risk of internal moisture and condensation.
System Components
A complete IPB system can include main bus sections, branch bus sections, generator connection structures, transformer connection structures, wall penetration structures, support steel structures, monitoring and alarm units, and anti-condensation devices.
Technical Parameters
| Item | Typical Range |
|---|---|
| Rated Voltage | 10.5 kV – 35 kV |
| Rated Frequency | 50 / 60 Hz |
| Rated Current | 1,000 A – 35,000 A |
| Short-Time Withstand Current (2s) | 50 kA – 315 kA |
| Peak Withstand Current | 125 kA – 800 kA |
| Protection Degree | Up to IP65 |
Monitoring and Protection
For higher operational visibility and safety, Wetown IPB systems can integrate intelligent monitoring functions such as conductor temperature monitoring, humidity monitoring, pressure monitoring, leakage detection, and remote data transmission to DCS or plant control systems.
Anti-Condensation Solution
Condensation inside enclosed bus systems can affect insulation performance and long-term reliability, especially in humid climates or during start-stop cycles. To address this, Wetown can provide air circulation drying and micro-positive pressure protection.