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P&B

Diode Protection Units

To protect models fitted with reed switches PENTA P&B offers a wide range of Diode Protection Units. These protect the reed switch contacts against the effect of inductive loads, such as those caused by tripping relays within the marshalling kiosk or control room, typically used to provide multiple simultaneous switching signals. The protection is achieved by means of a suitably rated diode wired across each load. The diode must be rated with forward current at least as high as the steady load current and connected observing polarity so as to absorb the back e.m.f.

D1 Diode Unit (RFA-04905)

Suitable to protect a single reed switch within our standard -/VO models.

D2 Diode Unit (RFA-04900)

Suitable to protect both reed switches within our standard -/VO models.

D2 c/o Diode Unit (RFA-04900/1)

Suitable to protect both normally open and normally closed of a single reed switch within our standard -/Vc/o models (or both normally open options for both switches). Note: 2 units required to protect both switches fully if required.

D1 Diode Unit (RFA-04905)

Special D1 Diode unit with m6 external connection terminals to ease site wiring.

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P&B Weir Electrical Ltd (PENTA P&B) is the leading designer, manufacturer and supplier of quality electrical safety products.

PENTA P&B is a globally recognised designer, manufacturer and supplier of temporary portable earthing, voltage detectors, Buchholz relays and electrical safety products.

With a heritage spanning over eighty years, and world-class experience in equipment designed for the safe maintenance of power systems, PENTA P&B provides customers with high-quality service, reliable solutions and technical expertise.