1、Use: This serial electric switches boards (case ),
are suitable for the tower crane that skyscraper , reservoir dam ,
power plant ,etc. use on the construction site. Control the
starting of the jack-up motor, adjust the speed, applies the brake
and reversing.
2、Condition of work ：
（1）The height above sea level does not exceed 2000 meters ; (2)The
temperature of medium around is not higher than +40 degrees
Centigrade , is not lower than - 30 degrees Centigrade;
(3)The relative humidity does not exceed 85% ;
(4)The medium around has not exploded dangerously, there is no
conductive powder and can destroy such places as the insulating
corrosivity gas ,etc. ;
(5)Protect the grade and adopt IP54 , IP55.
Type meaning:
- Code name of one kind of groups: QT- tower crane Pattern,
characteristic code name: Z - is it is it rise tower machine , X -
lay person who turns tower round , S - is it is it rise tower
machine , K - install the tower machine , G - the regular type
tower fast by oneself to turn round to lay by oneself to turn round
to go to Classify: Switch board (case ) this according to related
tower machine blow gravity square with can divide for 16t.m , 20t.m
, 25t.m , 30t.m , 40t.m , 50t.m , 60t.m, 63t.m , 80t.m, 100t.m,
125t.m, 160t.m, when more than ten kinds of specifications.
This electric switch board adopted standard of
GB9462-88 " technological condition of the tower crane ", the shell
should be made curved with the stencil plate , according to the
needs of users' reality, can make into different external dimension
and size of installation . Install way adopt hanging type or base
type , inside electric component its can select different products
of type for use, for instance the contactor can select series of
Model CJ20 , LC1 series , B series ,etc. for use , can also select
for use and import the component .
This serial electric switch boards cooperate with
hoist control cabinet, one that is to tower crane is it rise , turn
round to get up, car become piece , starting , reversing is it
control to transfer the speed , apply the braking that cart walk,
realize distribution of supporting , short out , pass electric
current , overvoltage , owe voltage , zero , disconnected phase ,
equal to protecting to hoist by mistake.
Serial electric switch board this adopt vortex brake and switch
over electrical machinery rotor way that resistance combine
together go on speed of transfering, is it transfer speed or
coupling is it step down starting is it switch over resistance
transfer speed , electromagnetic to transfer to difference transfer
speed , moment electrical machinery transfer the speed to add to
vary voltage very much to become, can adopt frequency conversion to
adjust speed and PLC control method .
Each sport organization in the tower machine can adopt different
adjusting the speed way .
