EP Series Single-Phase Input Single-Phase Output Line Frequency Industrial UPS

EP Series Single-Phase Input Single-Phase Output Line Frequency Industrial UPS (1kVA to 15kVA)

Compact Online UPS with Built-In Output Isolation Transformer, Masterless Parallel Function For IT Rooms & Light Industrial Critical Loads

Product Overview

      The EP series single-phase input single-phase output line frequency industrial UPS adopts full digital control and pure online double conversion topology, supporting N+1 redundant parallel connection with up to 6 units. 

      This EP series single-phase input single-phase output UPS integrates an output isolation transformer, which effectively suppresses mains surges, spike interference and load harmonic distortion, realizing optimal power matching between loads and UPS. 

      Featuring outstanding stability and reliability, this single in single out UPS is widely deployed to protect critical equipment, including small data centers, communication cabinets, financial terminals, tunnel monitoring systems and semiconductor production lines.

Key Features & Benefits

Stable & Secure Power Supply

   ● Wide input voltage and frequency range reduces charge-discharge cycles and extends battery service life

   ● Built-in output isolation transformer lowers neutral-ground voltage and suppresses harmonic impact on the inverter

   ● Excellent load adaptability, strong overload and short-circuit resistance to prevent equipment damage under harsh grid conditions

   ● Independent heat dissipation system ensures high reliability in demanding operating environments

   ● Online double conversion technology delivers continuous, stable regulated power supply

Superior Grid Adaptability

   ● Ultra-wide input voltage and frequency tolerance adapts to unstable utility grid and diesel generator power supply

   ● Full DSP digital control enhances overall system reliability

Intelligent & Simple Operation

   ● Masterless autonomous current-sharing parallel control; maximum 6 units can be paralleled

   ● Intuitive LCD display enables real-time monitoring and convenient local operation

   ● Optional RS232/RS485, SNMP and dry contact interfaces for remote management

Universal Technical Specifications (Shared by All EPDD Models)

Main AC Input

Rated Input Voltage: 220Vac

Input Voltage Range: 160-280Vac

Input Frequency Range: 50Hz±5% (45-65Hz)

Inrush Current: >20%

Bypass Section

Static Transfer Time: 0ms via static switch control technology

Static Bypass Overload Capacity: 200% load for 5 minutes; 1000% load for 10 seconds

Frequency Synchronization Range: ±1Hz, ±2Hz, ±3Hz adjustable

Manual Maintenance Bypass: Not available for EPDD001L / EPDD002L / EPDD003L; Available for EPDD006L / EPDD008L / EPDD010L / EPDD015L

Battery System

Battery Type: Sealed lead-acid maintenance-free battery

Charging Current: Standard 1A, long cabinet version 4A

Low Battery Protection: Automatic shutdown

Output Performance

Nominal Output Voltage: 220Vac

Output Power Factor: 0.8

Voltage Regulation: ±1% under static load; ±2% under 100%-0% load step change

Frequency Stability (Battery Mode): 50Hz±0.1%

THD: <1% for full linear load; <3% for 100% non-linear load

Frequency Tracking Window: 46-54Hz

Output Waveform: Pure sine wave

Crest Factor: 3:1

Short-circuit Protection: Automatic circuit protection, bypass breaker trip

Abnormal Output Protection: Automatic switchover protection for inverter output

Topology: Online double conversion, built-in output isolation transformer

Full Load Efficiency: >90%

Environmental Conditions

Noise Level (2m front distance): <50dB

Operating Temperature: -10℃ ~ 40℃

Storage Temperature: -25℃ ~ 60℃ (battery excluded)

Relative Humidity: <95% non-condensing

Altitude Rating: No derating below 1000m

System Functions

N+1 Parallel Redundancy: Supported

Protection Items: Overload, short circuit, overtemperature, battery overvoltage / undervoltage

DC Cold Start: Supported

Generator Compatibility: Supported

LCD Display: Transformer status, rectifier status, inverter status, battery status, bypass status, fault alarm, operation mode, electrical parameters, historical fault records, language setting, ECO mode

Fan Control: Automatic speed regulation

Ingress Protection: IP20

Alarm Items: Mains abnormality, abnormal battery voltage, overload, UPS fault, short circuit

Communication: Standard RS232 & USB; SNMP and dry contact terminals (optional)

Monitoring Software: Multi-OS compatible, supports remote status monitoring and remote shutdown

Model Differentiated Parameters Table

Typical Application Scenarios

     1.Small data rooms, communication server cabinets and network management centers

     2.Financial branches, securities trading terminals and bank data nodes

     3.Highway and railway tunnel lighting & monitoring control rooms

     4.Port information centers, stadium monitoring and control systems

     5.Semiconductor production lines and factory automated control equipment

Frequently Asked Questions

Q1: How many units of this EP series single-phase input single-phase output UPS can be paralleled?

A1: Masterless parallel design supports up to 6 units for capacity expansion or N+1 redundant backup.

Q2: Can this single in single out UPS work with diesel generators?

A2: Yes. The wide input voltage and frequency range is optimized for unstable generator power supply.

Q3: What is the benefit of built-in output isolation transformer?

A3: It suppresses surge noise, reduces neutral-ground voltage and prevents harmonic current feedback to upstream power grid.

Q4: Does small capacity EPDD001L / EPDD002L / EPDD003L come with maintenance bypass?

A4: Maintenance bypass is only available starting from EPDD0006L and higher models.

Q5: Is altitude derating required during installation?

A5: Full power output is available below 1000m; capacity derating is required above 1000m altitude.

Quality Assurance

      This line frequency UPS adopts industrial-grade component design. All performance parameters pass complete factory testing to guarantee stable long-term operation for commercial and light industrial sites.

Request Custom Quotation

      Fill in the inquiry form with required capacity, grid environment, parallel scheme and battery backup runtime. Our technical sales team will send customized quotation and complete datasheet within 24 working hours.