129

N.C.S. Limiter (Fig. 21).—The object of this instrument is to limit the current, that a consumer may take to a predetermined value ; if this value is exceeded the “ Limiter” introduces a resistance into the lighting circuit, and causes the lamps to flicker. The instrument is built on the thermal principle, and the current is carried through a steel wire which expands by the heat and opens a contact which is held in position by a spring. The breaking of this contact introduces a resistance in the lighting circuit, thus dimming the lights.

FIG. 21.

in i

This reduction of the main current allows the steel wire to cool again, with the result that the circuit is restored to its original condition, and the operation is rapidly repeated. A condenser is put across the break, so that the sparking is reduced to a minimum, and the whole apparatus in enclosed in an iron case. These limiters are for use in connection with Messrs. Handcock and Dykes’ scheme of charging for electrical energy (see Journal of the Institution of Electrical Engineers, 1908, p. 345 ; 1910, p. 67). The limiter is in use at Harrogate and other places.

*

5

I

---

Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 99,21 %.

La langue de reconnaissance de l'OCR est l'Anglais.

---