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Megger adapts relay test sets for the future


With the new and patented GOOSE Message Interface from Megger, it is now possible to use existing conventional test sets for testing protective relays and other items of substation equipment that communicate via the IEC 61850 networking protocol. The new interface makes possible big savings, as there is no longer a need to purchase costly new test equipment for networked substations.

  • Translates GOOSE messages to binary
  • Fast and effective
  • Avoid early obsolescence
  • Secure

Avoid early obsolescence

The key benefit of the GOOSE Message Interface is that it allows engineers and technicians to continue using equipment with which they are familiar, and also that it avoids the early obsolescence of test sets that are not IEC 61850 compatible, many thousands of which are currently in use.

Translates GOOSE messages to binary

In substations where IEC 61850 is used, relays, circuit breakers and other devices communicate with each other by means of GOOSE (Generic Object Oriented Substation Event) messages transmitted via the network. Megger’s innovative GOOSE Message Interface intercepts these messages and translates them into binary (on/off) signals that are compatible with conventional test sets. Likewise, the unit translates binary signals from the test set into GOOSE messages.

Fast and effective

All messages are processed by the interface in less than 0.5 mS, which means that no noticeable time delays are introduced into test sequences.

The GOOSE Message Interface has ten binary inputs and ten binary outputs, and a port for connecting it to the IEC 61850 substation network. The relationship between the inputs, outputs and the GOOSE messages is freely programmable by the user. The GOOSE Message Interface therefore acts as a universal adaptor that can be used with any type of relay test set – it is not limited to test sets from a specific manufacturer.

As the binary outputs of the GOOSE Message Interface provide sufficient power to drive external electromechanical relays directly, the unit is also an invaluable aid in the testing of substation control and interlocking systems and, in this application, it can be used as a standalone device, without the need for a relay test set.

Further security

A further advantage of the new unit is that it provides a complete solution to network security problems related to the testing of substations, as it does not require a PC to be connected to the substation network. It can even be used as a GOOSE firewall, allowing standard network analysis software running on a PC to be used to analyse traffic on the substation network.

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