2.4.7
Cab Control Station
2.4.7.1
General
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NOTE: Provide bridge and trolley directions
normally oriented to main compass headings. If
stepped speeds and/or drift point are specified,
include the applicable requirements in this
paragraph. Delete aux hoist switch if not necessary
for the project.
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Crane control shall be accomplished by a [bridge-mounted] [trolley-mounted]
cab control. Master switch operating handles shall be spring-returned to
OFF, [shall have distinct drift point detents,] [shall have distinct
speed-point intents] and shall have OFF position latching. Master switch
enclosures shall be NEMA Type 1. POWER-OFF pushbutton shall have a red
mushroom head. POWER-ON pushbutton shall be green or black. Cab master
switches shall be as follows:
a.
Main Hoist - up/down.
b.
Aux Hoist - up/down.
c.
Bridge - [_____] [_____].
d.
Trolley - [_____] [_____].
e.
POWER-OFF.
f.
POWER-ON.
2.4.7.2
Cab Indications
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NOTE: If hoist thermal sensor is specified, include
requirement for amber light. Voltmeter applicable
to dc control systems only. If rail clamps are
specified, include sentence regarding rail clamp
operation and indication. If flood lighting is
specified, include requirement for toggle switch.
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Amber pilot lights to indicate excessive hoist motor temperature shall be
provided. A white pilot light to indicate that power is available on load
side of crane disconnect switch shall be provided. A blue pilot light
shall be provided to indicate that the main contactor is energized. [A
minus 300 to plus 300 Vdc voltmeter shall be supplied to monitor the main
rectifier output voltage, a selector switch shall be provided to select the
voltage to be monitored.] [A red pilot light shall be provided to indicate
the rail clamps are set.] [A single-toggle switch shall be provided to
operate crane floodlights.] [A single green pilot shall be provided to
indicate all micro-drive clutches are engaged.]
2.4.7.3
Cab Controls
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NOTE: Delete this paragraph if combination controls
(cab and pendant or cab and radio control) are not
used. If it is desirable to raise the pendant out
of the way, include the last sentence. Otherwise,
delete.
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SECTION 14630A
Page 39
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