| 摘要 |
<p>Facade heating of a building is provided by mounting a polymeric self-regulating heater (12) within the framework surrounding the glass panels. An electronic earth leakage current breaker (2) is used with the heater (12) and can be subjected to potentially-damaging high ambient temperatures under normal load conditions. A temperature sensor (6) is arranged to sense ambient temperature and to activate the ELCB (2) at a predetermined temperature so as to switch off the current therethrough and through the heater (12).</p> |
