POWER SUPPLY PROTECTION UNIT

Model: PU-27V

Salient Features

  1. Protects 27 Volt DC operated Ground Testers /Equipments from inadvertent / Abnormal operating power
    • Blocks AC voltage to the equipment
    • Reverse polarity protection for DC
    • Over Voltage protection for DC
    • Easy for fitment, can be used separately
  2. Alerts operator by indication: “AVERT” LED and sound annunciation while blocking incorrect input voltage
  3. No additional wiring to the testers other than unit to be placed in series of input power leads
  4. Unit size 105 x 75 x 65 mm and weight 380 grams can fit inside most testers
    5.

Specifications

  1. The unit disconnects power to output and sounds Alarm under the following conditions:
    • Over voltage DC 35 Volts ± 3 Volts
    • Reverse DC: 0 to 60 Volts
    • AC 0 to 300 Volts 40 Hz to 450 Hz
  2. The unit provides out power under the following condition:
    • Normal DC power input +15 to +32 Volts
  3. Indication: RED LED Indication inscribed “AVERT” glow for improper in power
  4. Annunciation: Piezo buzzer sounds indicating error in type of input power
  5. Relay Rating: Unit has built in relay to isolate the incorrect type of power supply

    6. Relay Rating:
    • 10A DC
    • Blocking voltage: 440 V
    • Operating Coil Voltage: 12 to 24 volts
  6. Operating Temperature: Up to 55°C & 90% R. H.(non-condensing)
  7. Other Specification: The unit is compact and can be mounted in the Panels/ Ground testers having adequate and proper space; otherwise can be mounted and wired externally. Input and output connectors are on the top of the unit making it convenient to wire and easy to document in flow diagram and layout. Terminals are screw-on type and protected by a transparent acrylic guard plate. Terminals on the “Terminal Block” have insulating barrier that is rated to withstand 1000 volts.