AC/DC-sensitive Differential Current Sensors (DI-Sensors) * * * * * * * * * * * * * * Closed loop sensors with magnetic probe for highest accuracy and reliability Differential current range typically 30 to 300 mA Full load current to 50 A Single +5 V voltage supply Voltage output for direct connection at A/D - converters Automatic demagnetization of the sensor core for offset decrease Self-monitoring and test functions Measuring accuracy 1.5% Smallest temperature drift, highest long-term stability Metal screen against external fields Frequency range DC to 10 kHz Variants with passing through opening and with integrated primary conductors, with or without test winding Active sensors with integrated electronics Economical construction Applications Control devices with AC/DC-sensitive differential current sensors are used primarily in transformerless solar inverters. An important safety function of these devices is the monitoring of the leakage current of the entire system from photovoltaic - modules and inverter against earth. A defective system can become dangerous for people or release fires. Before it comes so far, the inverter must disconnect from the grid. The leakage current contains DC and AC components. Therefore an AC/DC-sensitive monitoring unit is necessary. Their heart is the VAC differential current sensor, whose output voltage is evaluated by the control system of the solar inverter. Generally protection devices with AC/DC-sensitive differential current sensors can be used everywhere, where flat or pulsating DC can develop, whose amount is permanently greater than zero. Further examples are power supplies producing high DC voltages or uninterruptable power supplies. Variants of the VAC Sensors It is both a type available with an opening for the primary conductor, as well as types with built-in primary conductors for PCB mounting. There are versions with two or four conductors for single and three phase systems. The additional functions demagnetization, error signaling and internal test power are accessible through defined levels at the inputs / outputs Vout and Vref. Allstromsensitive Differenzstromsensoren (DI-Sensoren) Seite 1 von 7 Functional description, technical data, available Types Item no. T60404-N4646... X960 ... X975 ... X950 ...X976 Style Dimensional diagram no. Primary conductor style 1 opening 2 via PCB. Two conductors A= 6,2 mm for operating current 3 via PCB. Two conductors A= 6,2 mm for operating current, one conductor for external test current 4 via PCB. Four conductors A= 4,9 mm for operating current, one conductor for external test current Properties Supply voltage Supply current Maximum primary current Nominal differential current Output voltage Measuring range Output voltage range Reference voltage Frequency range Measuring error at Tamb = 25C Temperature drift -40 ... +85C Response time (up to 90% of nominal differential current) Isolation strength acc. to EN50178 (primary- and test current conductor vs. signal and supply voltage connections) 5V typ. 17 mA 50 A 300 mA reference voltage (0,74 x differential current / 300 mA) 850 mA 0,5 V ... 4,5 V 2,5 V reference voltage, internally generated or Vref=1.4 to 3.5 from external source 0 ... 10 kHz, limited by internal low pass filter. An additional external filter with e.g. 5 kHz roll off frequency is recommended. < 1,5 % of nominal differential current < 0,1 mV/C < 35 s to be maintained by a proper insulation of the primary onductor - system voltage - working voltage 600 V 1.000 V Additional functions Error condition - indicated by - critieria - output voltage < 0,5 V - break or short circuit of the magnetic probe, supply voltage smaller 4 Volts, during the demagnetization cycle. Demagnetization of the Sensor core - triggered by - duration of cycle Internal DC test current for self test - triggered by - output signal at test current - feeding the supply voltage or transition from <1 V to 2,5 V (normal voltage) at the reference voltage input, i.e. after test current cycle - 120 ms - setting reference voltage to 0 V (<1 V) - U DC = +0,25 V at Vref = 0 V. A possibly appearing primary current is superimposed Allstromsensitive Differenzstromsensoren (DI-Sensoren) Page 2 of 7 Mabilder Mabild Nr. 1 Typen T60404-N4646-X950 IP 41,750,25 Toleranz der Stiftabstande 0,2mm (Tolerances grid distance) 7,0 DC = Date Code F = Factory 2x2,54 27,94 F 25,8 Marking: UL Mark Excerpt from Item no. F DC, in which F = Factory DC = Date Code Connections: 1 ... 4: 0,7 x 0,6 mm Pin Assignments 1 Vc +5 V 2 GND 3 Vref In/Out 4 Vout DC 7,7 8,8 3,5-0,5 0,5 1 12,3 2 3 4 41,350,25 0,7x0,6 19,2 Allstromsensitive Differenzstromsensoren (DI-Sensoren) Page 3 of 7 Mabild Nr. 2 Typ T60404-N4646-X960 43 6,8 O2,8 1 2 46 0,6x0,7 5 40,64 8 17,94 Beschriftung (marking) 3 4 2x2,54 6,8 F DC 27,94 0,5 26,9 3,50,5 Toleranz der Stiftabstande 0,2mm (Tolerances grid distance) DC = Date Code Marking: F = Factory UL Mark Excerpt from Item no. F DC, in which F = Factory DC = Date Code Connections: 1 ... 4: O 2,8 mm 5 ... 8: 0,7 x 0,6 mm Pin Assignments 1 ... 4: primary current 5 Vout 6 Vref 7 GND 8 Vc +5 V Allstromsensitive Differenzstromsensoren (DI-Sensoren) Page 4 of 7 Mabild Nr. 3 Typ T60404-N4646-X975 Prufma (test dimension) Toleranz der Stiftabstande 0,3mm (Tolerances grid distance) Beschriftung (marking) DC = Date Code F = Factory 2,54 1 2 F DC 8,89 10 46 5 10,46 9 7 B 4406-C150 40,64 8 18,8 17,94 4 2x2,54 3 6,8 0,5 10,57 27,94 43 26,8 3,50,5 41,5 Marking: UL Mark Excerpt from Item no. F DC, in which F = Factory DC = Date Code Connections: 1 ... 4: O 2,8 mm 5 ... 8: 0,7 x 0,6 mm 9, 10: O 0,8 mm Pin Assignments 1 ... 4: primary current 9, 10: test current 5 Vout 6 Vref 7 GND 8 Vc +5 V Allstromsensitive Differenzstromsensoren (DI-Sensoren) Page 5 of 7 Mabild Nr. 4 Typ T60404-N4646-X976 Toleranz der Stiftabstande Pin 1....6 = 0,2mm Pin 7...14= 0,3mm (Tolerances grid distance) DC =Date Code F =Factory Prufma (test dimension) 9 8 10 7 2,54 56,5 20,8 2x2,54 21,23 5 8,89 4 72,5 6 2 27,94 1 1,52 16,53 67,5 14 13 11 12 15,35 20,35 43,1 27 3,50,5 Beschriftung (marking) Marking: UL Mark Excerpt from Item no. F DC, in which F = Factory DC = Date Code Connections: 1 ... 4: 0,6 x 0,7 mm 5 ... 6: O 0,8 mm 7 ... 14: O 2,5 mm Pin Assignments 1 Vc +5 V 2 GND 3 Vref 4 Vout 5, 6: test curent 7 ... 14: primary current 3,50,5 Allstromsensitive Differenzstromsensoren (DI-Sensoren) Page 6 of 7 VACUUMSCHMELZE GMBH & CO. 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Allstromsensitive Differenzstromsensoren (DI-Sensoren) Page 7 of 7 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Vacuumschmelze: T60404-M4645-X150 T60404-M4645-X160 T60404-M4645-X170 T60404-N4646-X950 T60404-N4646-X960 T60404-N4646-X975 T60404-N4646-X956 T60404-Q5790-X101 T60404-N4646-X970 T60404-N4644-X300 T60404Q5790-X800 T60404-N4646-X401