LKVE

LKVE function

The LKVE electronic overload protection system consists of a force transmitter with amplifier and an electronic signal processing unit. The LKVE force transmitter is attached to a stationary line part. The rope is deflected via a slight angle between the two wheels and the clamping jaw. When loaded, the rope tends to straighten and applies a force which is transmitted to the load cell. The load cell in the LKVE delivers a signal proportional to the force on the load cell. The signal is amplified and is converted to 4-20mA. This standardized signal (4-20mA) allows distances between the force transmitter and the electronic unit to be 500 m.

LKVE safety

The LKVE is not directly included in the hoisting system and does not affect the construction of the lifting equipment. Thanks to the design of the clamping jaw, the measurement is not affected by the changes in the rope diameter that occur after some use. In a system with a Electronic Unit, the LKVE operates in “Fail Safe Mode”. This means that all faults (cable faults, short circuits etc.) will lead to an overload condition. The LKVE can be overloaded mechanically by 100% without affecting the accuracy of measurement.

LKVE measuring signal

The LKVE delivers a defined output of 4-20mA, which is robust and not subject to interference. The 4-20mA out put signal can handle serial resistances of up to 250 Ohm and the cable can therefore be extended up to around 500 m. The cable, 4 x 1.5 mm2 transfers supply voltage to the load cell amplifier and in return feed the Electronic Unit with the input signal.