Emirel W19

RELAY OUTPUT The two internal relays RA and RB are “normally ON” (the NC contacts are closed) and they will go “OFF” in case of alarm. ANALOG OUTPUT At the pins 17-18 (+ on pin 17) the voltage 0-10Vdc full scale (max 1mA) is available. The 0-10 Vdc signal is proportional to the instant active power Wa measured. It is suggested to apply a DC VOLTMETER DVD 08, with calibration of the reading, in order to display "100" or the value appearing on the display of W 19 during normal operation (“A” screen). INPUTS Input Resistance = 800 k Voltage pins: 15-13-11 (See Remark 3). Maximum threephase voltage is 415 Vac. For higher voltages is requested the application of M 08: Threephase drop resistances (see Fig. 8). In the W 19 set VN of the motor. Ex. 480V Motor M 08 480/400 and in the W 19 set VN=480V. Current range: direct up to 80A, with external CT .../5 for current higher than 80A. The use of CT with range 0.5 is recommended. OUTPUTS RELAYS 5A (NO) 230 Vac, resistive load “a1” 8-9 NO 8-7 NC Device not “b1” 5-6 NO supplied 5-4 NC SUPPLY: 24 Vac or 230 Vac single voltage 6VA 50-60 Hz ±10% pin 1-2 DIMENSIONS: 100x70x110 mm Din Rail Accessories (on request): E 405A transparent cover for tight closure. WORKING TEMPERATURE: 0÷70°C WEIGHT: Kg 0,550 COLOUR: grey

FUNCTION The device detects the absorbed current I, the three-phase or single-phase voltage V, the cosφ and the active power Wa absorbed by the motor. USE The electric motor is the typical load to be controlled by a power monitor relay. In fact by monitoring the absorbed power we get very accurate information about the load applied to the motor. Such information is more complete than the current intensity. In fact the cosφ variations can generate power variations, even in absence of remarkable variations of current value.

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