I - I - - - - - - - - - I - - - - - - - - -
o 10
50
Operation time Load condition 1
-
, - - - - - - - - - ,
0.4
100
I
-------I
0
50
100
Operation time Load condition 3
0.2
1 - 1 - 1 - 1 - -
0 16.7 33.3 50
100
Operation time Load condition 2
- - - , - - . - - - - - - - - - - - - - - - - ,
0.8
1100
0
90
Operation time Load condition 4
Table2.21 Standard of lifting motor
Group
Intermitted operation
Continuous Operation
F.E.M
ISO
Cycles/h
Starts/h
ED(%)
Operation cycle/min
1 DM
M l
15
90
15
7.5
1 CM
M2
20
120
20
7.5
1 BM
M3
25
250
25
15
1 AM
M4
30
180
30
15
2M
MS
40
240
40
30
3M
M6
50
300
50
30
4M
M7
60
360
60
60
SM
MS
60
360
60
>60
2.3 Safety devices
( 1) Side magnetic braking device
It is a unique design which is characterized with the ability that
the brake acts immediately as soon as the electric power is cut off.
(2) Hooks and safety latch
The hook is hot forging with high tensile steel and heat treated to
meet the demands on strength and hardness.The operation safety
of the lower hook is ensured by its 360
°
degrees rotation and safety
latch.
(3) Anti-phase protecting device
It is special design to control the circuit not to work and protect the
electric motor from being burned in case of wiring error in the power
supply.
(4) Limit switch
It is installed where the weights is lifted on and off to make the motor
stop automatically so as to prohibit the chains from exceeding for safety.
(5) Emergency stop switch(optional)
The button is used to stop the hoist in emergency. It is red, mushroom-
shaped push button, located on the top of the push buttons. When the
button is pushed, the power supply to the equipped is cut off and the
button is locked automatically. Turn it in clockwise to release the button
and restart the hoist.
c::€J juoco corn qi
6
emergency switch
c::€J !uo co co q 1
4
emergency switch
c:::( • (lQ
oaj
i
2
emergency switch
llt-f
Iii
.1
2.4 Technical parameters of electric chain hoist
Capacity(ton)
0.5
1
1
1.5
2
2
2.5
3
3
3
5
Chain Fall
1
2
1
1
1
2
1
1
2
3
2
Remove Litre of Altitude
3/9 m
Chain Diameter(mm)
6.3
6.3
7.1
10
10
7.1
11.2
11.2
10
7.1
11.2
Lilting Speed(m/min)
6.8
3.4
6.6
8.8
6.6
3.3
5.4
5.4
4.4
2.2
2.7
Motor Power(kw)
0.75
0.75
1.5
3.0
3.0
1.5
3.0
3.0
3.0
1.5
3.0
Power Supply(V)
200-600
E.D.Rating(%)
40
40
40
40
40
40
40
40
40
40
40
7.5
3
11.2
1.8
3.0
40
