Operation Instructions for ZLP250
Temporarily Installed Suspended Access Equipment
6
SB1
Starting button
YB
Electromagnetic brake
SB2,3
Control button
FU
Fuse
STP
Emergency stop button TX
Power board
U
Rectifier for brake
HL
Power indicator light
3.5.3
The principle of electric control is as below:
The principle of electric control is as below:
Press start button----Start the contactor (KM1) ---The power indicator light
starts---Press the control button---Main contactors (KM2, KM3) work:
Main contact point closes-
--
Thermal overload relay
---
The motor
electrifies and works
---
The platform lifts or lowers
Normal close contact opens---Contact is closed
Normal open contact closes---Electromagnetic brake works
Press emergency stop button---Starting contactor loses power supply--- cut main
power supply and controlling power supply ---platform stops
Upper limit switch works
Starting contactor loses power supply--- Cut main power supply and
Controlling power supply ---platform stops; Alarm bell rings
(If the upper limit switch bumps the limit block and works, only after the suspended
platform is lowered, the start button and control button can be pressed.)
(If power failure happens, it needs to pull upwards the handle release switch to make
the suspended platform lower down to the ground.)
3.6 Steel Rope
3.6.1
The steel rope used in hoists for the equipment is special galvanized steel rope,
diameter is 8.3mm, rated strength is 1960Mpa, breaking force is over 53kN.
3.6.2
The maintenance and inspection of steel rope
The steel rope should be kept and maintained in a proper way to prevent
corrosion and pollution, and the steel ropes should be regularly inspected for
deformation and breakage. The rejection of steel rope is as per the specification of
GB5972.
3.6.3
Special notice:
The steel rope must be the steel rope designated by our company.
The steel rope should be replaced in any one of the situations below:
a.
The loosening, twisting, untwisting, or any other deformation and distortion.
b.
The steel rope should be rejected when the rope breaking number within the range