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With GOOSE, it is 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 message interface allows engineers and technicians to continue using equipment with which they are familiar and avoids the early obsolescence of test sets that are not IEC 61850 compatible.

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.

GOOSE 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.

All messages are processed by the interface in less than 0.5ms so no noticeable time delays are introduced into test sequences.

The GOOSE Message Interface has 10 binary inputs, 10 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 its binary outputs provide sufficient power to drive external electromechanical relays directly, the unit enables the testing of substation control and interlocking systems, and can be used as a standalone device, without the need for a relay test set.

A further advantage of the 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 also 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.

Megger

For 100 year Megger has been committed to making electrical measurement of low and high voltage systems more accurate and simple-to-use. It has a reputation for tough, reliable, high quality equipment.

For 100 year Megger has been committed to making electrical measurement of low and high voltage systems more accurate and simple-to-use. It has a reputation for tough, reliable, high quality equipment.

Megger offers equipment for testing breakers, protection relays and CTs, as well as transformers, earthing systems and standby batteries to the electrical generation, transmission and distribution industries. In the LV sector Megger is the market leader for the testing of building wiring to the 17th Edition of the Wiring Regulations and portable appliances.

They have recently acquired a range of water leak detectors

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