PIAB Overload Protection System - Hüttenwerke Krupp Mannesmann AG (HKM) the German steel company, selects PIAB Overload Protection System for three new Electrical Overhead Travelling Cranes delivered by DEMATIC, Wetter, Germany.
Product:
Eight units PIAB Electronic Transducers LKVE 8 with the PIAB Crane
Safety Monitor CSM.
Customer:
DEMATIC, Wetter, Germany.
End-user: Hüttenwerke Krupp Mannesmann AG (HKM),
Germany.
Background:
In strong competition with other suppliers in the trade PIAB
Sweden AB proposed to DEMATIC an Overload Protection System which should
monitor the load in the crane and switch off at Slack Rope condition and
Overload. Additionally, the Maintenance Department of the end-user (HKM)
also specified the requirement for recording of the hoist operation as
per FEM 9755-3, FEM 9511, ISO 12482-1. The cranes are designed with an
"anti sway" system and have an 8x2 reeving configuration with
eight "dead ends".
Eight units PIAB Electronic Transducers LKVE 8 are attached directly to the eight wire rope "dead ends". The output signal from the LKVE (4-20 mA) is wired into the PIAB Crane Safety Monitor CSM 8:517. The CSM evaluates and computes the signals and can be set at a number of different alarm levels. The CSM also indicates the actual load and records the operation in each hoist.
DEMATIC did select the PIAB system thanks to the following reasons;
1. SIMPLE AND SWIFT INSTALLATION
Installation
could be made without influencing or changing the design or the working range
and capacity of the Overhead Travelling Cranes.
2. SYSTEM DELIVERED CALIBRATED FROM FACTORY
Easy and quick installation due to the fact that the PIAB System is calibrated
and switch values are pre-set at the factory.
3. ROBUST OUTPUT SIGNAL RESISTANT TO INTERFERENCE
The PIAB LKVE transducers (Attached to wire rope dead end.) provide a
4 - 20 mA signal output, which could be installed together with other
electrical cables without causing any disturbance.
4. SIMPLE ON-SITE-ADJUSTMENT OF SETTINGS
All limit settings, time delays, etc., could be easily adjusted via the
6 push buttons on the panel of the CSM Electronic unit. (No screwdrivers
or voltmeters are needed for the adjustments of the functions.
5. SYSTEM MONITORS INHERENT IMBALANCE IN HOISTING STRUCTURE
Uneven loading in each wire rope reever could easily be identified
from the readout display on the CSM - Unit. Further, the display is of
great importance at wire rope replacement- and/or adjustment.
6. RECORDING OF HOIST OPERATIONAL CYCLES
The operational condition information from the CSM enables a more efficient
pre maintenance work for the crane service staff.
7. FAILSAFE SYSTEM
PIAB CSM is a self checking unit. Occuring faults result in overload indication.
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