DC UPS System For 11kV Switchgear

A Brief Overview

Helios Power Solutions developed a DC UPS system for Ravensdown Fertiliser – ABB in New Zealand, featuring a seismic-rated, 5.5kW, 110VDC output unit for 11kV switchgear protection. This system includes advanced monitoring, a programmable controller, and a backup battery, ensuring continuous, reliable operation and switchgear safety.

Key Facts

  • End customer: Ravensdown Fertiliser – ABB
  • Location:South Island, New Zealand
  • Solution:38U 5.5kW 400VAC Three Phase Input / 110VDC Output Voltage DC UPS with Battery Backup

Features

  • Five Hot swappable 1.1 kW rectifiers modules.
  • Fully programable controller with TCP/IP MODBUS+ ethernet/ SNMP.
  • 9 x 12V 100Ah Batteries.
  • I/0 Peripherals.
  • Distribution rack.

Customer's Requirement

19” rack solution to house batteries and charging equipment as well as DC distribution panel. The cabinet will have to be suitably seismic rated. The station battery and charger system will be a single battery system comprising one 200% rated capacity battery bank, plus one 200% rated battery charger, and accessories.

The DC solution shall provide the following alarm output contacts for the principal’s use:

  • Power supply failure ( to the monitoring system).
  • System Voltage/current abnormal.
  • Battery condition abnormal ( self-diagnostic facility).
  • Battery temperature abnormal.

Distribution for powering 8 panel 11kV switchgear DC loads and SEL700 Series re-lays, motor protection, feeder status indications and metering functionality over Ethernet to the Plant SCADA System.

Helios' Solution

CAB741

38U 1889mm H x 600mm W x 800mm D Sol Series Battery Charging System with 4 hours backup battery housed in the same cabinet with distribution and battery protection.

CAB741 is a 5.5kW 125VDC convection cooled float charger in a 38U 19” Floor
Mount cabinet. The system comprises of a CXC HP controllerHV-ADIO unit, five 1.1kW 125VDC rectifiers in a 6U 19” rectifier rack with AC distribution and a 3U 19” DC distribution panel.

The charger’s output is set to 123.12VDC at 25°C (124.2VDC @ 20°C) and will be adjusted by the temperature compensation feature of the unit. The temperature sensor is connected to the charger by 3.5m lead and needs to be fitted to the battery bank.

Features:

  • Five Hot swappable 1.1 kW rectifiers modules.
  • Fully programable controller with TCP/IP MODBUS+ ethernet/ SNMP.
  • 9 x 12V 100Ah Batteries.
  • I/0 Peripherals.
  • Distribution rack.

Primary Products Installed

  • Power limiting and wide range AC input.
  • Available in 24, 48, , 125, 125 & 220 VDC standard output variants.
  • Hot Swappable.
  • Local and remote setup, adjustment.
  • Universal Controller for all 24 - 220 VDC The Sol Series Cordex Systems
  • Integrated USB host for local firmware upgrades, configuration updates & system backup/restoration
  • Seamless integration of multiple energy systems
  • External ADIO peripherals for customizing unique I/O configurations

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