Emirel W22-2

INPUTS Voltage pins : 23-21-19. Input Resistance = 800 kW See REMARK 4. Current pins : 15-14. No specific order to be followed. The maximum three-phase voltage is 415Vac; the maximum monophase voltage is 240Vac (see REMARK 6). For higher voltages, it is requested the application of: M 08: Three-phase drop resistances + CT for insulation. OUTPUT RELAY 5A(NO) 3A(NC)-230 Vac resistive load R1 9-10 NO 9-8 NC Device not supplied R2 5-6 NO or in alarm 5-4 NC ANALOG OUTPUT Pin 26(+) and 25. 0÷5Vdc IMAX = 1mA The theoretical value of “full scale” power shown in the tables A, B, C allows to give the “WEIGHT” to the Analog Output Volts. Ex.: with full scale of 5A (V=400 Vac) the 5V of the Analog Output corresponds to 3,45 kW, therefore 1V = 3,45/5 = 0,69 kW SUPPLY: (single voltage) 2VA 50-60 Hz - tolerance ±10% 13-12: 24Vac or 48Vac or 115Vac or 230 Vac INSULATION Galvanic separation it is given by the supply transformer and internal C.T. CASE 70x75x110 mm for DIN rail. E 405B transparent front cover for tight closure (on request). WORKING TEMPERATURE: 0÷70°C WEIGHT: Kg 0,300 COLOUR: grey, similar to RAL 35.

FUNCTION The wattmetric relay W 22-2 measures the voltage (V) and the current in the line (I), besides it computes the cosφ and the ACTIVE POWER as product of: W = 1,73 V I cosφ USE The electric motor is the most common load to be controlled by an active power relay. The active power supplied to the motor gives the direct information of the instant load of the motor itself. Such information is more accurate than the one given by the current value. As a matter of fact the cosφ variations may change the power value without affecting the current value.

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