Applications:

Steema's 33kV Vacuum Circuit Breaker Panels are essential for a wide range of medium-voltage power applications, including:

• Primary Substation Switching: Controlling and protecting incoming and outgoing feeders at 33kV substations
• Transformer Protection: Providing reliable protection for 33kV power transformers.
• Motor Starting and Protection: Controlling and safeguarding large industrial motors operating at 33kV.
• Line and Feeder Protection: Protecting overhead lines and underground cables within 33kV distribution networks.
• Industrial Power Distribution: Ensuring safe and controlled power supply to large industrial complexes.
• Integration with Renewable Energy: Switching and protecting connections to solar and wind farms operating at 33kV.

Unique Specifications and Advantages of Steema's 33kV VCB Panels:

• High performance, robust construction, and extended service life suitable for demanding 33kV applications
• Complete equipment designed for reliable indoor installation in 33kV environments.
• User-friendly design ensures ease of operation and maintenance.
• High performance with accurate fault interruption and dependable protection.
• Reliable operating mechanism prioritizes the safety of operating personnel.
• Vacuum Circuit Breakers provide exceptional performance in interrupting high-magnitude short circuit currents at 33kV.
• Integrated vacuum circuit breakers and advanced relays offer comprehensive protection against various electrical faults in 33kV systems.
• Manufactured in strict compliance with relevant industry and Ugandan standards, ensuring high reliability and minimal maintenance.
• Compact and sturdy circuit design guarantees mechanical reliability and long-term performance.
• Panels are rigorously tested in government-approved testing laboratories to ensure adherence to safety and performance specifications for 33kV equipment.
• Utilizes a durable Nine Tank and Oven & Spray based Paint Process for a high-quality finish and long-lasting protection against environmental factors.

Technical Parameters and Data for Steema's 33kV VCB Panels:

acuum Circuit Breaker Panels:

• Rated Voltage (Ur): 36kV
• Rated Current (Ir):
  • Standard Options: 630A, 800A, 1250A, 1600A, 2000A, 2500A
  • (Higher ratings available upon request)
• Rated Insulation Voltage (Ui): 72kVrms
• Rated Impulse Withstand Voltage (Up): 170kV peak
• Rated Frequency (fr): 50H
• Rated Short-Time Withstand Current (Icw)
  • Standard Options: 25kA for 1 second, 31.5kA for 1 second, 40kA for 1 second
  • (Higher ratings available upon request)
• Rated Peak Withstand Current (Ip):
  • Corresponding to Icw: 63kA, 80kA, 100kA (respectively for the Icw ratings above)
• Duration of Short Circuit: 1 second (standard; longer durations can be specified
• Protection Grade of the Enclosure: IP54
• Forms of Internal Separation: Up to Form 4b (depending on the complexity and requirements of the panel)
• Temperature Rise: Designed and tested to operate within acceptable temperature limits at an ambient temperature of up to 50°C.
• Standard Color for Panel: RAL 7032 Siemens Grey (other RAL colors can be provided based on customer preference).
• Vacuum Circuit Breaker Standards: Complies with IEC 62271-100 and relevant national standards
• Relay and Metering: Customizable based on project requirements. We offer a range of electromechanical and microprocessor-based protection relays from reputable manufacturers. Metering options include digital ammeters, voltmeters, energy meters, and multifunction power quality meters.
• Control and Interlocking: Designed with robust control circuits and mechanical/electrical interlocks to ensure safe and reliable operation.
• Cable Entry: Bottom or top cable entry options available with appropriately sized gland plates.
• Busbar Material: High-conductivity copper busbars, sized to handle the rated current and short-circuit withstand current.