Power frequency UPS uninterruptible power supply

Overview

The DHU series UPS is a power frequency online intelligent UPS carefully designed to meet the high reliability requirements of China's power grid environment and network system. The system adopts an online dual transformation topology design, which completely eliminates various interferences from the power grid, making the output of the UPS a pure sinusoidal power supply with stable frequency and voltage, noise filtering, no interference from power grid fluctuations, and low distortion; Adopting high-speed CPU control avoids the inherent hardware parameter temperature drift and other defects of traditional analog control, ensuring the consistency and reliability of UPS.

DHU series - single in single out power frequency online UPS (1-20KVA)

1、 Overview:

DHUThe series UPS is a single-phase input single-phase output uninterruptible power supply. This product adopts advanced digital technology, high-performance CPU+imported IGBT+imported SCR, completely eliminating various interferences from the power grid, making UPS output stable in frequency, voltage, low distortion, and low noise. Suitable for applications that are sensitive to power interference and require stable, reliable, purified, and uninterrupted sine wave AC power supply. The internal circuit of UPS adopts CPU control for automatic detection and management, high-frequency IGBT inverter, and Chinese LCD display. With its perfect grid adaptability and load adaptability, it is widely used in the communication industry, office automation, personal computers, postal and telecommunications, power, scientific research, healthcare, banking and other environments.

2、 Main performance characteristics:

◆ Super strong adaptability to the power grid
The wide input voltage range of 220V ± 25% enables UPS to operate normally in various harsh power grid environments, reducing battery discharge opportunities and extending battery life.
◆ Cold start function
In the absence of mains power, the UPS can be directly started with the battery pack to meet the emergency needs of users.
◆ Super strong load compatibility
Strong load-bearing capacity, good load compatibility, can be applied to various types of loads, and meet the needs of various application scenarios.
◆ Comprehensive protection function
It has multiple protection functions such as input overvoltage, undervoltage, output overvoltage, undervoltage, output overcurrent, short circuit, battery undervoltage, battery overcharge, power device overheating, etc., ensuring the reliability of system operation.
◆ Zero switching time
Built in static electronic bypass switch, when UPS is protected or fails due to various reasons, it can switch to bypass power supply without interruption, especially suitable for equipment with strict requirements for power outage time.
◆ Comprehensive battery management technology
Provide the most reasonable charging current according to the battery parameter curve, set the optimal charging current based on the battery capacity, and adopt advanced equalization floating current automatic conversion technology to improve battery efficiency and extend battery life.
◆ High current charger
Built in high current charger, suitable for frequent and prolonged power outages.
◆ Large screen LCD+LED display, seamless human-machine communication
The working status of UPS can be determined through LED, and the input and output battery parameters of UPS can be viewed through LCD. Enable users to stay informed about the working status of UPS at any time.
◆ Intelligent monitoring function
Through the RS232 interface, combined with UPS intelligent monitoring software, it can communicate with a computer, and various operating parameters of UPS are displayed at a glance on the communication interface. By installing SNMP cards, UPS can also achieve network monitoring function, allowing remote observation and management of various operating parameters of UPS through the network.
◆ Can achieve series hot backup or parallel redundancy

The accuracy can reach 0.05%

Main technical parameters:

model

DHU801

DHU802

DH803

DHU804

DHU806

DHU808

DHU810

DHU815

DHU820

Nominal capacity

1KVA

2KVA

3KVA

4KVA

6KVA

8KVA

10KVA

15KVA

20KVA

Working mode and principle

Power frequency dual conversion online type

hand over flow lose enter

phase number

single-phase

voltage

220V±25%

frequency

50HZ±10%

direct current

nominalDCvoltage

48Vdc

192Vdc

Floating voltage

54.5Vdc

218Vdc

cut-off voltage

42Vdc

168Vdc

Charging time

8Charging within hours90％

hand over flow lose go out

phase number

single-phase

voltage

220Vac±2%(Steady-state load), 220Vac±5%(Fluctuating load))

Nominal frequency

50Hz±0.5%(Battery mode)

power factor

0.8

Output waveform

sine wave

Total Harmonic Distortion

linear load<3%Nonlinear load<5%

Dynamic voltage transient range

±5%(load0～100%jump transition)

Transient recovery time

<20ms

Peak factor

3:1

overload capacity

＞125%，1min；＞150%，200ms

be unify point mark

Full load efficiency

≥90％

switch time

0ms

protection function

Overload, low battery voltage, under voltage, over voltage, over temperature,System failure

display mode

LCDParameter Display+LEDstatus display

communication interface

RS232TheSNMPCard (optional)

operating temperature

-5～40℃

relative humidity

20～95%(No condensation)

operating altitude

＜1500m,Reduce usage beyond this height,Every increase100mThe rated power has decreased1%

Protection level

IP21

cooling method

forced air cooling(Temperature controlled type)

noise(dB)

＜55dB

＜60dB

size (W*D*H)mm

200×480×490

210×612×540

240×540×680

330×640×885

550×450×1080/380×681×935

weight(Kg)

42

51

65

55

65

80

120

145

200