Model Number: HL- DT59 Brand Name: HOLLEY INTL Key Specifications/Special Features: Meter case: meets the protection requirements set by protection class IP53 of IEC60529, series types of cases and terminal covers are availableTerminals: connection terminals are made of nickel-plated brass with features of high mechanical strength, good conductivity and corrosion-resistanceTerminal block: terminal block is injection molded of heat- and fire-resistant bakelite, voltage test link can be located inside or outside of the meter caseDriving system: driving system employs three single electromagnet elements, all of which are mounted on the meter frame with three screws, each electromagnet element consists of voltage element, current element and connection boardRotor: rotor shaft is turned of high strength aluminum alloy, upper end of the shaft is pressed with a worm which is made of thermoplastic, and the lower end is embedded with a graphite bearing which is self-lubricate and friction-resistant to ensure long service life of the meter

Braking element: magnet is made of AlNiCo5 alloy and designed as U-shaped so that the effect of short time over currents upon the magnet is negligible

Temperature compensation plate, made of a special alloy, is embedded in the braking magnet, rotor speed can be adjusted largely and continuously by rotating the whole magnet

Frame: frame is die-cast by high quality SiAl alloy, structure is designed as W-shaped of stable property to avoid distortion, and its surface is treated with chromate to achieve reliable and durable coating against oxidation