stromunterbrechungsrelais, particularly 'off at peak times.

摘要

The relay operates in an electrical installation having a permanently supplied priority circuit (12) and a switched (36,38,40) non-priority circuit (14,16,18) the relay comprising a detector (20) monitoring the total load current and a circuit (22) processing the signal emitted by the detector. Diode displays indicate upper (PN) and lower (PR) current thresholds, and an operational amplifier circuit (A05-7) emits a load shedding signal when the current passes the higher threshold. after which a timer (C9,C10,R26) maintains the trip signal for a pre-determined interval. A timed tariff relay (60,62) operates a switch (50) to select the threshold appropriate to the tariff mode.