Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1990-08-28
1992-11-03
Pellinen, A. D.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307 46, 379413, H02J 700, H02J 906
Patent
active
051608510
ABSTRACT:
A back-up battery system for a switching equipment load in a telephone central office wherein the back-up battery system includes one or more rechargeable batteries having cells floated at a given float voltage and of a number such that when the batteries are switched in circuit across the load, the voltage of the batteries exceeds a minimum load voltage for a preselected period, and further being of a number such that the float voltage of the batteries exceeds a maximum load voltage.
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Elms Richard T.
Nynex Corporation
Pellinen A. D.
Swingle Loren
Torrente John T.
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