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CUBE SERIES
300-500kVA
 
CUBE series UPS is newly developed as a high frequency online tower UPS by KSTAR, adopting three-level technology in rectifier and inverter, high efficiency reach up to 95.3%, and adopting modular IGBT component, realize more wider input voltage range, more lower input and output harmonic distortion, more reliable, fully guarantee the user load to operate uninterruptable, suitable for area with poor power supply condition.
General Features       
● Double conversion online technology. IGBT rectifier .
● Wide input voltage  and frequency range makes it adapt to the harsh  environment of the grid. Power Walk In function  reduces  the impact of startup current on the generator, and minimizes the capacity of the generator which the parallel system demands.
● A novel full digital DSP&FPGA control strategy, which is a patent that can protect the ups unit when a single DSP or FPGA is fails.
● Patent modulation algorithm can reduce the area of the main circuit power, and limits the temperature rising of the main circuit inside the UPS .
● Patent short circuit modulation algorithm can make it resist to large power impact  .

Technical Specification
MODEL CUBE
Capacity (VA/Watts) 300k/270k 400k/360k 500k/450k
SYSTEM FEATURES
Overall efficiency(%) 95.30%
Parallel operation 4
Transfer time 0ms
INPUT
Rated input voltage 380/220Vac, 400/230Vac, 415/240Vac(3Ph+N+PE)
Operating voltage
 range
176~276Vac(phase), 305~477Vac(line)
Operating frequency range 40~70Hz
Power factor ≥0.99
Harmonic distortion (THDi) <3%(100% nonlinear load), <5%(50% nonlinear load)
Backfeed protection Support
Generator access Support
Power walk in Support
BYPASS
Rated input voltage 380/220Vac, 400/230Vac, 415/240Vac(3Ph+N+PE)
Frequency 50/60Hz
Bypass voltage range Max.voltage: +20%, Min.voltage: -40% (can be set by background software)
Synchronous
 tracking range
Max.3Hz (can be set by background software)
Bypass frequency range  Max.±20% (can be set by background software)
Backfeed protection Support
Generator access Support
OUTPUT
Rated output
voltage
380/220Vac, 400/230Vac, 415/240Vac(3Ph+N+PE)
Frequency 50/60Hz
Power factor 0.9
Harmonic distortion (THDv) <2%(100% Linear load), <3%(100% nonlinear load)
Voltage regulation <1%
Overload Load≤110%: last 60min, ≤125%: last 10min, ≤150%: last 1min, >150% 200ms turn to bypass mode
BATTERY
Battery voltage Optional voltage: ±192/±204/±216/±228/±240Vdc(32/34/36/38/40 pcs optional)
Charging power Max. 60kW
Charging current  Max. 100A
ENVIRONMENT
Operating
temperature
0~40℃
Storage temperature -20~70℃(no battery)
Humidity range 0~95% (Non-condensing)
Altitude <1500m. When >1500m, derating power for use
Noise level <70dB
IP protection level IP20
Other functions
Alarm function Overload, over-temperature, main path anti-backfeed, bypass path anti-backfeed,
mains power abnormal, UPS failure, battery low-voltage and other alarm functions
Protective function Short-circuit, overload, main path anti-backfeed, bypass path anti-backfeed,
over-temperature, battery voltage, output over-voltage, fan failure alarm, lightning protection, etc.
Communication
 function
CAN, RS232, Modbus(optional), SNMP card(optional), Dry contact card(optional)
EPO function Yes(local and remote)
PHYSICAL
Dimension
 D×W×H (mm)
850×1300×2000
Net weight (kg) 1200
STANDARDS
Safety  IEC/EN62040-1,IEC/EN60950-1
EMC IEC/EN62040-2,IEC61000-4-2,IEC61000-4-3,IEC61000-4-4,
IEC61000-4-5,IEC61000-4-6,IEC61000-4-8
Success Cases