5SHY5055L0002 ABB 3BHE019719R0101 GVC736BE101 stock

Product Details

Product Description

Product Description
5SHY5055L0002 ABB 3BHE019719R0101 GVC736BE101 stock
5SHY5055L0002 ABB 3BHE019719R0101 GVC736BE101 stock
Insulated power supplies and transformers always have a parasitic capacitance between input and output. This capacitance produces common mode displacement currents through the power supply line during voltage jumps. The gate unit is robust against these currents, however it is recommended to minimize them. This is especially important for applications with series connected devices where higher dv/dt referenced to ground occur. There are several possibilities to reduce such parasitic currents: • Minimize parasitic capacitance of the power supply • Feed the supply line through a ferrite core. This will reduce the peak amplitude of the displacement current and also reduce its rise time, thus relieving the strain on the gate unit • Use transformers with shielded windings. The gate unit supply connector has a pin that is directly connected to the housing (cathode). This pin can be used to carry the displacement current and bypass it to the cathode. Figure 7 shows the principle of this method.
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The displacement current is bypassed through the red marked path to ground and does therefore not flow through the sensitive electronics on the gate unit board. The connection from the isolated power supply to the IGCT is ideally made with a shielded cable using the shield to connect the secondary shield winding of the transformer with the gate unit.
The IGCT starts up around 3 seconds after supplying with power. During start up it consumes a high peak current and the voltage VGIN may dip below 28 V. A voltage dip which doesn’t meet the mask requirement in figure 8 (and figure 9), may damage the IGCT or a malfunction occurs. The voltage VGIN must be measured directly at the power input connector X1. For AC-Operation a scope with mathematic functions must be used. The absolute value from the voltage VGIN is to filter. The -3 dB frequency of the low pass filter should be at least 1.5 kHz. This method calculates the theoretical DC value of an AC square wave.
The optical control interface uses standard components, which are widely used throughout the industry. It is built up around the HFBR-1528 / HFBR-2521Z of Avago Technologies 1), operating at 650 nm. The recommended standard type optical fiber is 1 mm POF (Plastic Optical Fiber), which gives a cost-effective and easy-to-use solution. For long distances (> 15 m) the 200 μm HCS type (Hard Clad Silica) type is recommended (optional feature, please contact HCS factory). One of the most sensitive parts of the gate unit is the optical Interface. Strict adherence to the mounting instruction (chapter 4.5) is highly recommended to inhibit faults. The specific optical data are given in the data sheets of the IGCT products and on the supplier’s web site.

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