INPUTS Hole A, hole B; 0,1 VA, Ø 13 mm and terminal M+F (Fig. 3) for wires up to 1,5mm2 . RANGE 1,5÷100A - 50÷60 Hz. The phase failure is detected when the current goes below the value of Im=1A (Approximate value). The max current limit is represented by the diameter of the hole (Ø 13 mm) the cable passes through. It is necessary to consider that when external CTs are applied, the set point Im becomes: 1A x RR (RR= CT transforming ratio). Ex.: with CT 200/5, RR=40, the minimum working set point becomes 1A x 40 = 40A. If in one phase I becomes < 40A, it is detected as phase failure. In case such value is not accepted, the secondary of each CT shall have to pass two times through the CT hole, so that Im becomes 20A. For I<1,5A every wire should pass 2 or 3 times through A and B hole. OUTPUT 10A-250Vac - resistive load 4 - 6: NO Device not supplied 5 - 6: NC or in alarm SUPPLY: 2VA - 50-60 Hz Pin 1-3 2 VA - 50-60 Hz 24Vac ± 10% or 24Vdc (+ on pin 1) - 1W. DIMENSIONS 22x110x120 mm for DIN rail. CASE: self-extinguishing PC/ABS. Accessory on request: M 48A panel with hinges transparent polycarbonate. WORKING TEMPERATURE: -20 ÷ +70°C WEIGHT: kg 0,200 COLOUR: grey

FUNCTION By means of 2 built-in current transformers the device monitors the presence and the three phase sequence in a three phase system. USE By monitoring 2 of the three phases of a threephase system the device detects the phase failure and can detects the phase sequence by means of slider 2 of DS1.

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