UPS Dosan 3 pha UL-PW2033 20KVA

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POWERWELL series Online HF UPS 3/3phase 20KVA

(10-80kva, 200/208/220Vac 3-3phase, transformerless available)

Powerwell series 3 phase 10-120kva is a high end uninterruptible power supply, which has adopted the world leading electrical and electronic technology to increase performance and  super high reliability(MTBT>200,000h). 3nos high speed DSPs with completed digital control fully ensure highest quality of power supply and UPS reliability. Being kin to 1.0 input power factor and less than 2% THDi lead this UPS green and energy saved. It also offers humanization design: full front access of service ability, user- friendly touch screen.

Perfect Applications:

Internet Service, Middle Data Center, Medium-scale network system / computing center, bank and securities, business server group, Medium-scale office automation, precision equipment, etc.

Features: complete digital control technology

Fully digital control with two DSPs, all the subsystems are digital controlled including the IGBT rectifier, inverter, charger, discharger.

Excellent electrical properties

True online double conversion offers the safe and effective power protection for various loads, with strong output load capacity

High input power factor, green and energy-saving

Input with PFC and input PF of the whole UPS up to 0.99, THDi less than 2%

Dual AC input source supportable

Supportable AC and bypass separate input AC source

Strong environmental adaptability 

Wide input voltage and frequency range, adaptation to all kinds of power grid and almost any kinds of generator

Comprehensive protection measures 

Surge Protection, short circuit protection, and other protection to ensure the reliability of UPS system;

IGBT and SCR adopt the advanced EUPEC power module;

The adoption of advanced technology (IGBT driving technology, IGBT soft over-current shutdown, VCE protection) highly improves the reliability and safety of inverter.

Similar modular design

Each phase main board are designed like rack for easy assembling and maintenance

Inbuilt battery pack plug-in design for easy use

Intelligent battery management ABM

Adopting the intelligent battery management, extending battery lifespan extremely;

Intelligent interval  three-stage charging process( constant current, constant voltage, float charging and charger shut off, when battery voltage decrease to a lower level, charger restarts to work);

Automatic temperature compensation,( -0.11% per °C ), to extremely extend battery life by 30% and minimize the maintaining work;

Online detecting battery status

The max battery charging current can set by end users according to the battery features, to avoid any damage caused by the big charging current;

Back up time displayed on the LCD screen

Periodic self-test battery, detecting the battery problems timely

With battery inverse connection, over voltage / current protection, to protect the battery

Cold start and AC start Function

Directly start the UPS through battery or start UPS through Mains only.

Superior network monitoring capabilities 

Communication port (RS232, RS485, dry contact and so on) connecting with computer, SNMP card optional,

Easy-maintenance design (MMTM<0.5h)

  1. a) Adopts the full front maintenance design, reducing the restrictions on the installation space, and saving the space of computing center
  2. b) Modular design class, convenient and easy site maintenance
  3. c) With manual maintain bypass
  4. d) Battery replacement without disrupting the UPS running
  5. e) Historical records classified with search function, events up to1,000 items

Advanced parallel technology:

With digital control technology for cycle current control, parallel system with very high reliable and up to 6units, and sharing common battery;

Friendly interface with Large LCD with multi language display (7 languages)

Large LCD display and LED status indication; Abundant information display of UPS

English, Spanish, Portuguese, Russian etc.


Technical Specifications:

Model UL-PW2033
Rating Power 20 kVA/18kW
AC Input
Rated voltage 380/400/415Vac(Line-Line)
Input connection 3phase +N+PE
Power factor Above 0.999
THDi Less 2%
Voltage range -40%~+25%
Frequency 40-70Hz
Bypass +/- 15%(settable)
Power factor 0.9 (lag)
voltage precision 380/400/415Vac±0.5%

voltage transient

Less 5% ( 0~100% load step)
THDU THD less 0.6% ( linear load), 3%(non-linear load)
Crest Factor 3:1

tracking range


Frequency precision


±0.05%(Battery mode) , ±3hz(Line mode)

phase displacement 120±0.5°(Balance or imbalance load )
Voltage unbalance +/-3%( 100% unbalance load)

tracking rate

Less 1Hz/s
Overload capability 110%:1hour,110%<load<125%,transfer to bypass after 10 mins

125%<load<150%,transfer to bypass after 1 mins,Above 150%, transfer to bypass after 200ms

Bypass overload Below125%  long time operation

125%<Load<150%,10mins;above 150% 1S

System efficiency 93-94%(Line and battery mode)
98%(ECO mode)
Display  Touch screen LCD+LED



IEC61000-4-2 (ESD)
IEC61000-4-3 (RS)
IEC6100-4-4 (EFT)
IEC6100-4-5 (Surge)
Noise (1m) 50- 60dB
Insulating resistance Above 2M (500VDC)
Insulating intensity (input, output to PE) 2820Vdc, leakage current lower than 3.5mA, no flashover in 1min
Surge protection Meet the requirement of IEC60664-1class,endure surge of 1.2/50us+8/20us higher than 6KV/3KA
IP class IP20
Battery configuration
Installation(dc)              +/-216Vdc( 168/192/216/240Vdc settable from LCD screen)
Battery type Free Maintenance Lead Acid (Gel battery or Ni-Cd)
Long run Battery to be connected external
Inbuilt battery 36pcs*9ah
Connection Bottom cable connection in front
Charger 1-15A,ABM technology (settable from LCD)
Unit Dimension




Unit Dimension

(Inbuilt batt.)



Weight (kg)

(Long -run)

Weight (kg)

(Inbuilt Batt.)

(72pcs 9ah)


Note: For 110/120/127Vac (L-N), 60Hz 3phase, 10-100kva available.

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