USE Is indicated for monitoring the active power of a load (ex. electric motor). INPUTS: (form factor 1,11) Current: pin 1-2 (permanent overload 200%). It is fitted for direct connection or through a CT../5 or ../1 according to the maximum value of the input current. Voltage : pin 4-6-8 400Vac Standard - The phase used to measure the current (amperometric phase) must be connected to pin 4. The wiring of the other two phases is made without any specific sequence. VISUALIZATIONS ON GREEN LED : supply on GALVANIC SEPARATION The supplies of the input and output section are not in common. The two sections are optically separated by a linear coupler, without frequency conversion. INSTALLATION (wiring to an electrical board with a differential relay and a sectionalizing switch) see: fig. 3, 4 for 3-phase mains fig. 5, 6 for 1-phase mains The length of every wiring must be less than 30 m. CURRENT INPUTS pin 1, 2 (built-in CT 1,5VA) Model X: 0,1÷1A Model Y: 0,5÷5A Permanent overload 200%. VOLTAGE INPUTS Frequency 50Hz Input Resistance = 800kW pin 4-6-8 100Vac(line voltage)-0,25mA (0,05VA) 400Vac(line voltage)-0,25mA (0,17VA) VOLTAGE OUTPUT pin 12-10: 0-10V (+ on pin 12) load higher than 10 kW. CURRENT OUTPUT Pin 11-9 (current outgoing from pin 11) max load 500W Model A: 4-20-mA Model B: 0-20 mA Max error 1,5% (25°C) with input current > 1/10 of the full scale. RESPONSE TIME < 200ms 10%÷90% SUPPLY 2,5VA - 50-60Hz - Tolerance: ± 10% 16-15: 230Vac (or 24Vac) RANGES The device can be applied either with a CT/5, or with a CT/1. The device must work between 10% and 100% of the CT. CT SELECTION It is requested to choose the CT having a full scale a bit bigger than the maximum load current. (ref. to TAB A for 3-phase line and to TAB B for 1- phase line). Ex.: I = 15A. The nearest CT is 50/5 or 50/1. With one passage of the current wire through the CT, 1/3 only of the current is used (power will be lower due to cosφ<1). With three passages through the CT the current seen by the CT will be: 15x3 = 45A, so that almost the whole current range is used (see fig.2). Consequently the outputs will be 3 times higher than the values available with one passage only. Ex.: I = 15A - CT 50/5 - V = 400 Vac with 3 passages through the CT, the analog output 0-10V reads out V = 7,2V, and the effective value is Vu : 3 = 2,4 V. SIZE 45x75X115 mm - DIN rail Accessory on request: E 405D: transparent cover, fitted for tight closure. IP protection class: 40. WORKING TEMPERATURE: 0÷70°C WEIGHT:0,300kg COLOUR: grey.

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