PureWave® UPS System

250 kW – 16 MW · 208 V – 15 kV

Containerized medium-voltage UPS lineup installed on a customer site

Medium-voltage UPS connected directly to the incoming bus for whole-plant protection. RE&D owns the design, supports the installed base with spares, field service and refurbishment, and can build to order.

Transfers the load to the inverters typically within 1 to 4 ms (less than 1/4 cycle)
Output matches the load for one minute at full load, or up to three minutes at reduced power
Medium-voltage range: 2.5 to 20 MVA (2 to 16 MW) at 4 kV to 15 kV
Low-voltage range: 250, 500, 750 and 1000 kW at 208-600 volts
Electrically operated bypass breaker keeps the load on utility during maintenance
Monitoring computer with local and remote Ethernet access, password protected

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Overview

The PureWave UPS System protects critical loads from utility voltage disturbances and momentary interruptions. Under normal conditions the utility feeds the load through a power electronic switch; when a disturbance is detected the switch opens and battery-backed inverters supply the load through an isolation transformer.

The family is documented in two ranges: 2.5 to 20 MVA (2 to 16 MW) at 4 kV to 15 kV, and 250, 500, 750 and 1000 kW at 208-600 volts. Both are built from 250 kW battery modules and power conversion modules, with a bypass circuit breaker for maintenance and a monitoring computer for status and alarms.

Rated power: 250 kW – 16 MW

Specifications

Ratings: medium-voltage range (Instruction Sheet 653-510)

Power rating: 2.5 MVA - 20 MVA (2 MW - 16 MW)
System voltage: 4 kV - 15 kV

Ratings: 250-1000 kW range (Instruction Sheet 653-502)

Power rating: 250 kW, 500 kW, 750 kW and 1000 kW
Voltage: 208-600 V

Performance (both ranges)

Transfer time: Typically 1 to 4 milliseconds (less than 1/4 cycle)
Output duration: One minute at full load, or up to three minutes at reduced power
Normal operation: Utility supplies the load through the power electronic switch (PES); inverters start on a utility disturbance
Operating states: Ready, Run, Inhibit, Bypass, Bypass Isolate, Test in Bypass

Battery / Energy (both ranges)

Battery module: 250 kW battery module in each battery bay
Automatic charge: Two minutes of charge for each second of discharge at full load
Equalize charge: Automatic, every two months

Control & communications (both ranges)

Monitoring: Monitoring computer with local connection and remote access over Ethernet; username and password required
Local display (250-1000 kW range): LCD screen display
Alarm contacts: System Warning and System Fault (standard); Low Battery, Load Overcurrent, UPS Running (optional)
Generator interface: Optional dry contact to the transfer switch
Remote disable: Optional normally closed input contact

Physical

Enclosure bays (medium-voltage range): Battery bay, control bay, transformer bay
Cooling: Air conditioners with air-inlet and air-outlet vent hoods