GXTD series
1Pages

Wirewound flat resistors IdS Type series GXTD Wirewound flat resistor, degree of protection IP 40. Maximum width up to 200 mm, maximum length up to 400 mm. Standard version with aluminium-zink enclosure. With 2 FEP-wires, AWG 18 (0,79 mm2), 0,3 m long. Technologies Versions • superflat construction form, max. 5,0 mm • practically any length or width possible within the maximum dimensions • extremely adjustable to the given space • outstandingly appropriate for integration • higher continuous dissipation by mounting directly onto heat sink or cooling surface • test voltage for type GXTD is 2,5 kV • test voltage for optional type GKTD up to 7,7 kV Application An important application is the use as internal braking resistors as well as series resistors for current limiting when charging the intermediate circuit capacitors of frequency converters. These resistors are fitting extremely well into the given space. An additional application is the usage as heat resistor. Special design • enclosure made of stainless steel • connections according to customer wishes, faston receptable, cable lug etc. • different length of the wires Standard - design GXTD ..x.. Wirewound mica flat resistor, performed for a test voltage of 2,5 kV, for a DC voltage up to 800 VDC. At the moment in preparation: Design GKTD ..x.. Wirewound mica flat resistor, performed for a test voltage of 7,7 kV, for a DC voltage up to 848 VDC. The total power of a mica flat resistor depends upon the wire wound space A. The total power is therefore: P = P' x A (power in W) You can calculate as follows: A = L x B (dim. in mm) Example of dimensioning and selection of a specific unit: Braking resistor for frequency converter for integration into an enclosure, connection with wires; resistance value 100 Q; continuous dissipation 100 Watt, you can calculate the dimensions: A = P/P'= 100 W : 0,012 W/mirF = 8333 mm2. Taking a length with L=100 mm, you receive the width B=A/L= 8333 mm2 ^00 mm = 83 mm. So you get the width B 84 mm rounded and a given length L 100 mm. Type designation for standard-design 2,5 kV test voltage, type is GXTD 100x84-100; connection at 2 wires AWG 18, each 300 mm long. GXTD 100 x 84 - 100 ohmic value + 10% -width B -total length L -type series