Gestra markalı, ürün kodu NRG17-41 olan Gestra NRG17-41 ürününün fiyat ve detaylarını aşağıda inceleyebilirsiniz. Teklif almak için online teklif formunu doldurunuz.
Detaylı Bilgi - Gestra NRG17-41 Level electrode operation NRG17-41
The level electrode operation is based on the conduc-tivemeasuring principle. The NRG 1...-41 is designed for signalling the max. liquid level in electrically conductive liquids.n One liquid level with one switchpointThe NRG 1...-41 is to be used in conjunction with theswitching controller NRS 1-41 and further systemcomponents. The NRG 1...-41 in conjunction withits associated control equipment constitutes a waterlevel limiter with periodic self-testing routine (SMARTfunction) in accordance with TRD 604, sheet 1 and 2 andEN regulations. The level data are transferred from theelectrode NRG 1...-41 to the control unit via a CAN bus usingthe CANopen protocol.
The conductivity of the liquid is used to signal the liquidlevel. Some liquids are conductive, which means that theyallow an electric current to flow through them. For the safefunctioning of this device a minimum conductivity of the liquidto be measured is required.The conductivity measurement method can detect twoconditions: electrode rod submerged or exposed, meaningswitchpoint reached (or exceeded) or not yet reached. Beforeinstallation, the length of the electrode rod must be cut tothe required switching level, e. g. for “Pump off” or “Controlvalve closed” or, in case of economiser and air heaters thatare installed close to the steam-generating unit and exposedto a risk, “Firing/Burner off”.An additional electrode fully integrated in the system automatically monitors the electrical resistance path between earthand measuring electrode. As soon as the actual value fallsbelow the admissible resistance value the protection circuit isinterrupted and cuts off the pump or heat supply to the boiler.