BL7 series excitation variable resistorDetailed product description：

Purpose:
The BL7 series excitation variable resistor is suitable for manually adjusting voltage or current in electrical equipment circuits with a voltage not exceeding 500 volts, adjusting excitation voltage in electrode excitation circuits, and regulating the speed of DC motors.

Structure:
This variable resistor is composed of ceramic resistance elements and conversion devices, both installed in anti drip box shells. The resistance elements are made by winding resistance wires around spiral tubes or plate shaped components. The connecting contacts of the conversion device are installed on the insulation board. The protective box shell is made with ventilation holes for air convection, and the contact parts are adjusted by rotating the rear wheel with bridge contacts.

Ordering Notice:
Variable resistor model, power, total current, total resistance, divided into several sections, current value of each section, resistance value, and divided into several sections for each section.