UPS Un-Interruptible power supply

• Normally achieved with a battery backup.
• see

  • linux/ups

  • eco/powerbackup

The main focus here is to look at requirements for a UPS at a small remote branch or remote site.

Requirements / Ideal for remote unit's

• Critical
  • Remotely managed through network SNMP and possibly WEB

    • Status & Events, on-line, off-line, battery problems (SNMP and TRAPS)

  • Multiple input's
    • Escom power from grid
    • Solar from panels
    • Wind ?
    • Generator set - Autostart
  • Tolerant of harsh environment - 65C and vibrations.
  • 220V output or 48V. (Cisco needs 48v Regulated)
• Preferred
  • External battery's
    • Either modular, or capable of adding external lead-acid battery's
  • Battery management
    • Protection against damage due to full discharge
    • Measurement and reporting on quality/status/life of battery unit
• Nice to have
  • Remote power control, or scheduled control
    • Capable of switching off certain outlets (4-6 Outlets)
  • Environmental
    • Temperature etc. that could reduce battery life.
    • Capable of operating at high temperatures e.g. 65C
  • Reporting and historical data

Equipment power requirements

• 16w - Cisco 3000 Industrial Ethernet switch - 15Watt
• 50w - Motorola PTP300
• 12w - Cisco 350 AP
• ??w - Rectifier + Management

• Total: 16w + 50w x 4 + 12w x 2 = 240w ==> 5A@48v

Home Made UPS

• IP Power 9200 delux + UPS + Remote mon $70

• Aviosys power monitoring unit with network connection + relay's

South African Company's

• GSM-Tronix
• Meisner

...

CategoryNetwork