High-frequency IGBT (insulated gate bipolar transistor) rectifier- and inverter-based UPS systems, which can be referred to as the green UPS.

Uniline's D-Series UPS systems are designed to meet the growing demands of a new generation of leading-edge embedded products. D-Series UPS systems are high-frequency IGBT (insulated gate bipolar transistor) rectifier- and inverter-based UPS systems, which can be referred to as the green UPS as the input power factor is 0.99 and THDi (total harmonic distortion of the input current waveform) is less than five percent. In addition to offering high performance, flexibility, and robust functionality, D-Series UPS values are based on advanced technology, low cost, and total customer satisfaction.

Benefits

• Ideal for a wide range of applications with advanced technology, high reliability, efficiency, and functional structure
• IGBT rectifier- and inverter-based, low THDi, high input power factor (PF > 0.99); manufactured from 60 to 300 kVA single modules
• D series UPS parallelable up to seven units

Features

IGBT rectifier with PFC (power factor correction) - With the aid of advanced IGBT rectifier, input power factor close to 1 (> 0.99) and input current harmonic distortion less than five percent are achieved, resulting in reduced costs. It ensures clean and sinusoidal input current, and avoids pollution of the upstream power supply.

Intelligent battery management - DSP (digital signal processors) controlled battery management provides the maximum possible battery lifespan. Battery monitoring gives real-time information of battery capacity and the remaining time, which facilitates to proactively plan maintenance operations to avoid any unexpected power failures. UPS tests the batteries at certain adjustable intervals without switching off the rectifier, thus even if the batteries malfunction; it guarantees consistent operation of inverter for the critical loads supplied. Temperature compensated battery charging continuously monitors temperature changes in battery cabinet and adjust the charging rate accordingly that greatly extend the battery life.

Total digital control system - In D-Series UPS structure, in order to control and operate all power stages at their ultimate performance, two DSPs are dedicated. Various complex feedback algorithms, data acquisition, and communication protocols are sensed by simultaneously working DSPs.

Features of D-Series Parallel Operation

• Parallel feature is optional depending on customer requirements.
• Each unit is fitted with a bypass static switch.
• An extra isolated parallel board is provided.
• Accurate current sharing by using DSP-based advanced algorithm.
• Ring connection sensing the remove of the parallel cable
• Hot swap/easy power upgrade.
• Observing the whole system on each unit's LCD panel.
• Starting/stopping the whole system on each unit's front panel.
• Automatic bypass transfer when external bypass switch is used.
• Synchronization of two separate parallel groups/units.

D-Series is available in kVA ratings of 60, 80, 100, 120, 160, 200, 250, and 300 with a provision for paralleling up to seven units. The system is supplied with user-friendly touchscreen display with further facility of management by remote monitoring control by RS 232 or RS 485, SNMP, or web-based.