Product details

Brand: ABB

Model: DSTK221L3

product description :

DSTK221L3 is a  Power Resistor, Wire Wound

When the charge moves in the conductor, it will be affected by the collision and friction of other particles such as molecules and atoms, and the result of the collision and friction forms the conductor's obstruction to the current. The most obvious feature of this obstruction is that the conductor consumes electric energy and generates heat (or light). This obstruction of the object to the current is called the resistance of the object. Resistor (Resistor) in daily life is generally directly referred to as resistance. It is a current limiting element, after the resistor is connected to the circuit, the resistance value of the resistor is fixed, generally two pins, which can limit the current size of the branch connected through it. A resistor whose resistance value cannot be changed is called a fixed resistor. Variable resistance values are called potentiometers or variable resistors. An ideal resistor is linear, i.e. the instantaneous current passing through the resistor is proportional to the applied instantaneous voltage. Variable resistor for voltage division. On the exposed resistor body, one or two movable metal contacts are pressed tightly. Contact position Determines the resistance value between either end of the resistor and the contact.

Terminal voltage and current have a definite functional relationship, reflecting the ability to convert electrical energy into other forms of two-terminal device, denoted by the letter R, the unit is ohmω. Actual devices such as light bulbs, heating wires, resistors, etc. can be represented as resistor elements.

The size of the resistance value of the resistance element is generally related to temperature, material, length, and cross-sectional area, and the physical quantity that measures the size of the resistance affected by temperature is the temperature coefficient, which is defined as the percentage of the change in the resistance value for every increase in temperature of 1℃. The main physical feature of the resistance is the conversion of electricity to heat energy, it can also be said that it is an energy-consuming element, and the current through it generates internal energy. Resistance in the circuit usually plays the role of voltage division and shunt. For signals, both AC and DC signals can pass through resistors.

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