Power supply device with unbalance monitoring circuit
First Claim
1. A power supply device with an unbalance monitoring circuit for a direct voltage transmitted between two line conductors, which voltage normally is balanced with respect to ground potential, comprising:
- a voltage divider circuit connected between the two line conductors and which includes components which are in each case identical in pairs, a centre tap of the voltage divider circuit being connected to the ground potential and at further taps thereof positive and negative part-voltages referred to ground potential are produced, and comparator means for comparing a first positive part-voltage with a second negative part-voltage and a second positive part-voltage with a first negative part-voltage.
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Accused Products
Abstract
A power supply device with a monitoring circuit for detecting an unbalance in a direct voltage transmitted between two line conductors and which is normally balanced with respect to ground potential. A voltage divider circuit is arranged between the two line conductors and consists of components which are identical in pairs. The center tap of the voltage divider is connected to ground potential and at further taps thereof in each case positive and negative part-voltages are produced. A first positive part voltage is compared with a second negative part voltage and a second positive part voltage is compared with a first negative part-voltage so that the balance of the direct voltage with respect to ground potential is simply and reliably monitored.
18 Citations
20 Claims
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1. A power supply device with an unbalance monitoring circuit for a direct voltage transmitted between two line conductors, which voltage normally is balanced with respect to ground potential, comprising:
- a voltage divider circuit connected between the two line conductors and which includes components which are in each case identical in pairs, a centre tap of the voltage divider circuit being connected to the ground potential and at further taps thereof positive and negative part-voltages referred to ground potential are produced, and comparator means for comparing a first positive part-voltage with a second negative part-voltage and a second positive part-voltage with a first negative part-voltage.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A circuit for monitoring an unbalance condition between two terminals of a direct voltage power supply balanced with respect to a reference potential, said monitoring circuit comprising:
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a voltage divider circuit connected to said two power supply terminals and having a center tap coupled to said reference potential, said voltage divider circuit including at least a first pair of equal impedance components and a second pair of equal impedance components and with a first pair of taps at which, in a balanced voltage condition, equal first positive and negative part-voltages with respect to said reference potential are produced and a second pair of taps at which are produced equal second positive and negative part-voltages with respect to said reference potential, and comparator means coupled to the taps of the voltage divider circuit so as to compare the first positive part-voltage with the second negative part-voltage and to compare the second positive part-voltage with the first negative part-voltage. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification