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Measurement Limited

Measurement Limited
Terminal House
Lower Belgrave Street
London SW1


An Actadis ripple transmitter is installed at the electricity generating station which, by the operation of a single hand switch, transmits a high frequency "ripple" through the whole distribution network. In the lamp columns, an Actadis relay is installed, which receive the ripple and switch the lamps on or off. Control can be effected over very large areas.

The largest centralised control system in the world is installed in the City of Paris, now completely controlled by Actadis. There are 50 other installations around the world. The first installation in Great Britain was in Maidstone in 1937 and other authorities are following suit.

Advantages:

  • Event of fog or war street lighting (ARP) can be instantaneously controlled.
  • No maintenace whatever is required on the reception relays.
  • Relay failure in service only average one per 100,000 operations.
  • The system is infinitely extensible.
  • The system does not require extra cables but provides every benefit associated with them.

Using ripple signals of different frequencies allows other equipment to be centrally activated. - APLE Conference Programme 1938


References:
APLE Conference Programme Bournemouth 1938