US 2011/0255202 A1 · METHOD AND SAFETY DEVICE FOR MONITORING A BUS BAR OF AN ELECTRICAL ENERGY SUPPLY GRID

Abstract

A method for monitoring a bus bar with regard to short circuits that may occur. The bus bar has a feeder and at least two outgoers. A outgoer safety device is provided at each outgoer and a feeder safety device is provided at the feeder. In the case of a short circuit in one of the outgoers, the outgoer safety device associated with the outgoer outputs a blocking signal to the feeder safety device, delaying or preventing actuation of a power switch disposed at the feeder. In order to provide a method wherein comparably little installation effort is required, the outgoer safety devices send repeating communication telegrams to the feeder safety device by way of a data transfer bus, and the feeder safety device checks the receipt of the communication telegrams by way of a checking logic, and optionally prevents the execution of a blocking signal. A feeder safety device is correspondingly configured.

Claims13

Dependent claims

1-12. (canceled)

A method for monitoring a busbar in an electrical power supply system for an occurrence of short circuits, wherein:

the busbar has a feeder and at least two outgoers;
an outgoer protective device is provided on each outgoer for monitoring the respective outgoer for shorts;
and
a feeder protective device is provided on the feeder for monitoring the busbar for shorts;
and
the method which comprises:
on occurrence of a short in one of the outgoers, transmitting a blocking signal from the outgoer protective device associated with the respective outgoer to the feeder protective device, the blocking signal delaying or blocking a tripping of a circuit breaker connected on the feeder;
repeatedly sending communication messages via a data transmission bus from the outgoer protective devices to the feeder protective device;
checking a reception of the communication messages with the feeder protective device;
with the feeder protective device, classifying an outgoer protective device as being faulty from which no communication messages are received within a defined time period, while communication messages have been received from at least one other outgoer protective device during the defined time period;
and
if at least one outgoer protective device is classified as faulty, preventing an issuance of the blocking signal with the feeder protective device.

9 more elements

Dependencies are inferred from the claim text.

Method and safety device for monitoring a bus bar of an electrical energy supply grid

Life of this patent

Method and safety device for monitoring a bus bar of an electrical energy supply grid

Life of this patent

Abstract

Claims13