120kVA low-frequency UPS for a CT scanner in Cameroon

120kVA low-frequency UPS for a CT scanner in Cameroon

A hospital in Cameroon was installing a new CT scanner and needed a dedicated UPS to protect the imaging system from voltage fluctuations and power interruptions. TAFENG, under the BLAZING POWER brand, supplied a 120kVA low-frequency online UPS with a built-in output isolation transformer, a 32 × 12V 100Ah battery bank, and a manual maintenance bypass.

CT scanner power requirements

The CT scanner presents a dynamic load and needs stable power throughout each scan. The hospital required 0ms transfer time, voltage regulation, battery backup, and isolation between the UPS output and the scanner.

The system was configured for:

• 120kVA / 96kW capacity
• 380VAC three-phase input and output
• 0ms transfer time
• Built-in output isolation transformer
• 32 × 12V 100Ah lead-acid batteries, with an estimated backup time of approximately 10 minutes
• Manual maintenance bypass
• SNMP, RS232, and RS485 communication

120kVA low-frequency UPS solution

TAFENG supplied the W-120KL 120kVA / 96kW low-frequency online UPS. Its transformer-based design includes a built-in output isolation transformer that provides galvanic isolation between the UPS output and the CT scanner and helps reduce electrical noise on the load side. This was a key reason for choosing a low-frequency UPS rather than a high-frequency unit for this application.

The 32 × 12V 100Ah lead-acid battery bank was designed for an estimated backup time of approximately 10 minutes. A manual maintenance bypass lets technicians service the UPS without disconnecting the scanner. SNMP, RS232, and RS485 interfaces support remote status monitoring and alarms.

Key specifications

Installation and commissioning

The UPS and battery system were installed at the hospital's CT imaging site and successfully completed site commissioning. The system was then placed into service as the dedicated power protection system for the CT scanner.