Usually installed at either end of the size of the car.
Can be divided into positive and negative 90 ° rotation and
positive and negative 180 ° rotation, can achieve the size of the
car single / double speed limit control.
General 1-shaped limit, a car on a single body to use 2, two-speed
to use 4, but the font limit only 1 can be used.
For example, the FCR006 limit switch is used to control the
distance of the workbench on the crane, usually in the following
order: When the crane moves forward to the limit distance, the
ECR006 is activated to cause the motor speed to drop until the
operation is completely stopped and the conversion Commutation
circuit. The motor will move in the opposite direction (rear).
|Safety standard||Product||IEC 947-5-1, EN 60 947-5-1, VDE 0660-200, UL 508, CSA C22-2|
|Machine||IEC 204-1, EN 60 204-1, NF C 79-130|
|Ambient air temperature||Work: -25~70℃ Save:-40~70℃|
|Resistant to vibration||9 gn (10E 500Hz)|
|Impact resistance||68 gn|
|Protection against electric shock||Type Ⅰ IEC 536 and NF C 20-030|
|Degree of protection||IP54|
|Threaded hole||1/2NPT, M20x1.5, PG13.5|
|Rated operating voltage / current|
AC-15: A600 (Ue=240V, Ie=3A)
DC-13: Q300 (Ue=250V, Ie=0.27A)
|Rated insulation voltage||Ui=600V|
|Rated impulse withstand voltage||Uimp=6kV|
|Forced open function||Normally closed contact with forced leave function meets IEC
947-5-1 Section 3, en 60 947-5-1|
|Contact resistance value||≤25mΩ|
|Short circuit protection||10A fuse, type gG (gl)|
Screw clamping terminal,
wire size: Max.1x0.5mm2, Min.2x2.5mm2
Use category: AC-15 and DC-13
Maximum operating frequency: 3600r/h
Load factor: 0.5
Crane in the course of operation, it is inevitable that the driver
operating errors, the phenomenon of control failure occurred. In
order to avoid the occurrence of such things, must be installed in
the various mechanical protection device - limit device
Usually when the work machine reaches the end of the role. It is
also known as terminal switch. Limit switch principle and structure
and travel switch is basically the same, but the use of the two
different. The stroke switch is to control the travel of the
machine, and the limit switch to control the position of the work
machine, and often the terminal position or limit position. For
example, the limit switch in the gantry planer controls the
position of the planer table. When the table to move to a close to
its limit position, the limit switch will move, change the control
circuit, forcing the table reverse movement, so as to avoid the
table indefinitely move in one direction and out of the base.
Limit switch is a commonly used small current master electrical
appliances. The use of the production of mechanical moving parts of
the collision to make its contact to achieve the opening or
breaking control circuit, to achieve a certain control purposes.
Typically, such switches are used to limit the position or stroke
of mechanical movement, so that the movement of machinery according
to a certain position or stroke automatically stop, reverse
movement, variable speed movement or automatic round-trip movement.
In the electrical control system, the limit switch is to achieve
the role of sequential control, positioning control and position of
the state detection. Used to control the travel and limit
protection of machinery and equipment. Construction: consists of an
operating head, a contact system and a housing.
In the actual production, the limit switch is installed in the
pre-arranged position, when installed in the production of
mechanical moving parts of the module hit the trip switch, the
limit switch contact action to achieve the circuit switch.
Therefore, the trip switch is a movement of the parts according to
the location of the switch circuit of electrical appliances, and
its role is similar to the principle of the button.
Limit switches are widely used in various types of machine tools
and lifting machinery, to control its travel, the terminal limit
protection. In the elevator control circuit, but also the use of
travel switch to control the speed of the car door, automatic door
opening limit, car upper and lower limit protection.
The limit switch can be mounted on objects that are relatively
stationary (such as fixed frames, door frames, etc.) or moving
objects (such as traffic, doors, etc.). When the animal is close to
still life, the contact of the switch's drive switch causes the
closed contact to break or break the contact closed. By the switch
contact opening and closing state changes to control the circuit
and the action of the body.
Other technical indicates
|Maximum trigger speed||1.5m/s|
|Mechanical life||10 million times|
|Minimum action force||Switch trigger||0.45N.m|
|Forced out of work||0.75N.m|
After 20 years rapid development, NANTE and its parents company
ZHONGJIAN Group has grown into a leading integrated solution
provider for crane and crane components in China. Dedicated to the
research and development of new lifting and handling technologies,
we adopt innovative ideas and design in developing new products and
services. Backed up by a wealth of industrial experience on lifting
industry, we can provide to customer wide range of lifting
equipment and components with scientific design, good safety, high
performance, efficient operation and low maintenance cost. We are
committed to help our clients to reduce investment cost, improve
production efficiency, and economize energy consumption.