Opening of Bids - Spec T Eighteen (18) More or Less New Heavy Duty Mobile Lifting Systems - Interstate Lift & Equipment Company, Inc. (bid security chk submitted)

Home Browse Search

7.2.1.Each Primary panel shall Include: • A NEMA 4 rated control enclosure. • A disconnect switch to control source power, Switch shall be capable of being locked in the off position for operator safely. • A pilot light to indicate that the power is turned on. • A phase relay to assure proper phasing of the supply power • A transformer to convert incoming supply voltage to 110V which is supplied to the PC. The PC then supplies 24V to the control circuit. Transformers shall have fuse protection • A spring loaded three position selector switch for selecting ALL, PAIR or SINGLE operation. • An ADDRESS switch to designate column number. • Two dead -man type push buttons for UP and DOWN operation. • A PARK button to engage the mechanical lock. • A red FAULT light to indicate a fault in the lift operating system. • A PO to monitor the proper operation of the lift and provide motion control. • Red LED lights to with diagnostic chart to aid in fault trouble shooting. • Thermal relay to protect the motor in the event of an overload. • Fuse protection to protect the cables in the event of a short circuit. • A red mushroom palm type emergency stop button to allow immediate manual shut down of the entire lifting system. A power cable with a minimum length of 50 feet. 7.3. The primary column control panel shall have the capacity to be used as a primary panel or a secondary panel without electrical modification. An ADDRESS switch on each primary column shall allow the column to be designated any column number 1 through 10 (a maximum of 10 columns per set may be used). A primary column may be designated as a primary by selecting number 1 or as a secondary by selecting numbers 2 through 10. The secondary columns may be designated as any column number 2 through 10 using the ADDRESS switch. The control system shall allow the flexibility of breaking up sets to be used as sets of two in geographically separate areas or combining sets to create a set of up to ten without modifying the electrical system. 7.4. Individual operation of each column shall be achieved by simultaneously turning and holding the spring loaded operation mode selector switch to the SINGLE position and pressing the UP or DOWN button on that column. Lifts that use operation mode selector switches that are not spring loaded shall not be accepted due to the possibility of Inadvertent switching by other operators in the shop. 7.5. Paired or axle operation shall be achieved by simultaneously turning and holding the spring loaded operation mode selector switch on either of the two columns on the axle to the PAIR position and pressing the UP or DOWN button on that column. Lifts that require a complicated sequence of pressing reference buttons on multiple columns shall not be accepted. 7.6. Paired or Individual operation shall be permitted at any time during the lifting cycle. It shall be possible to switch from SINGLE, PAIR, or ALL operation in any order regardless of the height position of the columns. 7.7. The control system shall utilize a printed circuit board and micro -processor to ensure proper operation of the lift. The printed circuit board shall have LED lights with a diagnostic chart to facilitate trouble shooting.