×

Backup protection switch to prevent reverse power flow in a UPS

  • US 4,763,014 A
  • Filed: 09/21/1987
  • Issued: 08/09/1988
  • Est. Priority Date: 09/21/1987
  • Status: Expired due to Term
First Claim
Patent Images

1. An uninterruptible power supply, comprising:

  • a first input for accepting a primary source of energy,a second input for accepting a reserve source of energy,an output for accepting a load to be energized,an energy coupling apparatus for coupling energy from the first and second inputs to the output and capable of coupling energy from the second input to the first input, and including first coupling means for directly coupling the first input to the output and second coupling means for coupling the first input to the output with amplification.first and second primary disconnect switches for decoupling the first input from the first and second coupling means of the energy coupling apparatus when energy is being supplied to the output from the second input,a backup disconnect switch for disabling energy flow from a reserve energy source connected to the second input into the first input,means for faciltating a flow of energy from the second input to the first input should at least one of the first and second primary disconnect switches fail in a mode enabling energy flow through at least one of the first and second primary disconnect switches,means for sensing energy flow from the energy coupling apparatus to the first input and operative to enable the backup disconect switch to open.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×