External battery UPS uninterruptible power supply supports long delay expansion of server room backup power supply equipment

Description :

  External battery UPS is an uninterruptible power supply system with an external battery interface, which mainly solves the problem of damage to sensitive electronic devices caused by power interruption and voltage fluctuations. It converts DC power to AC power through a built-in inverter, seamlessly switching during power outages to ensure the continuous operation of critical loads such as servers, network devices, and monitoring hosts. Unlike models with built-in batteries, external battery UPS is designed specifically for scenarios that require long delay power supply, allowing users to flexibly configure large capacity battery packs according to their actual backup power needs. Typical operating conditions include data centers, medical imaging rooms, industrial control cabinets, and security monitoring centers. It is a core power protection equipment that ensures business continuity.

  This type of product usually adopts an online or online interactive topology structure, with a wide range of input voltages. Common specifications support single-phase 220V or three-phase 380V input, and the output is a standard sine wave with distortion less than 3%. The body design focuses on heat dissipation and maintenance convenience, equipped with an LCD display screen or LED status indicator light, which displays real-time input/output voltage, frequency, load percentage, and battery remaining capacity. The execution standards mostly comply with GB/T 7260.3 or IEC 62040-3 specifications, and have multiple safety mechanisms such as overload protection, short circuit protection, and battery overcharge and overdischarge protection. In terms of interfaces, RS232/USB communication ports are usually standard and support SNMP network management card expansion, making it easy to access the dynamic environmental monitoring system for remote management. The shell material is mostly cold-rolled steel plate spray painted, suitable for working environments ranging from -5 ℃ to 40 ℃.

  When selecting, it is important to distinguish between two types of models: "built-in battery" and "external battery". If only a short-term buffer (such as 5-10 minutes) is needed for safe shutdown, a built-in battery type can be selected; If you need to deal with long-term power outages (such as more than 1 hour) or wish to flexibly increase backup time in the future, you must choose an external battery UPS. The difference lies in the fact that there is no battery or only a small capacity starter battery inside the external model host, which is relatively compact in size, but requires additional procurement of battery cabinets and connecting cables. The purchaser needs to pay attention to the charging current parameters of the host to ensure that they match the ampere hour (Ah) of the selected battery pack, avoiding slow charging or damaging the battery. In addition, it is necessary to confirm the output power factor, and it is recommended to choose products with a power factor of 0.9 or above to better adapt to modern IT equipment power supply.

  During installation, it is necessary to ensure good ventilation and keep away from heat sources and corrosive gases. The battery pack should be placed in a dedicated battery cabinet and securely fixed. It is recommended to use copper core cables and crimp the terminals according to specifications to prevent excessive contact resistance from causing heating. It is recommended to conduct a charge and discharge test every quarter for daily maintenance, check the consistency of battery terminal voltage, and replace outdated batteries in a timely manner. The service life of lead-acid batteries is usually 3-5 years, and lithium batteries can reach 8-10 years. Common faults include frequent switching of mains power leading to shortened battery life, and load overload causing bypass power supply, which can be quickly located through panel alarm codes. Regularly cleaning the dust screen and keeping the host clean can effectively extend the overall operating life and stability of the external battery UPS. Kehua YTG3120 UPS Product Parameters

(Power frequency online type | Three in single out | Tower type long-lasting machine | No built-in battery | Built in isolation transformer)

1、 Core specifications

-Rated capacity: 20kVA/16kW (PF=0.8)

-Topology: Power frequency dual conversion online type, built-in output isolation transformer, pure sine wave output, 0ms switching

-DC voltage: 192VDC (connected in series with 16 12V batteries)

-Overall efficiency: Dual conversion mode ≥ 91%, supports ECO energy-saving mode

2、 Input parameters

-Input system: three-phase input, single-phase output (380V input/220V output)

-Input voltage: 304~478VAC

-Frequency: 45-55Hz adaptive, compatible with generator power supply

-Input power factor: ≥ 0.95

3、 Output parameters

-Output voltage: 220V ± 1%

-Output frequency: mains synchronous; Battery mode 50Hz ± 0.5%

-Waveform distortion: Linear load<2%, non-linear load<5%

-Overload capacity:

110% long-term operation

Maintain 125% for 10 minutes

Maintain 150% for 1 minute

4、 Physics and Environment

-Installation method: tower type

-Dimensions: 380 × 780 × 720mm

-Whole machine weight: approximately 165kg (bare machine without battery, including power frequency transformer)

-Noise: ＜ 65dB

-Communication interface: RS232, dry contact, EPO emergency shutdown, optional SNMP monitoring card

-Protection functions: overvoltage, undervoltage, overload, short circuit, over temperature, battery reverse connection, zero ground isolation protection

5、 Applicable scenarios

Industrial automation equipment, medical equipment, precision instruments, large laboratories, and harsh power grid environments require three-phase input and single-phase high-power isolated and stabilized output scenarios.

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