21
Swiss Lifting Solutions
3.2.3 Brake system
The spring-loaded brake is a solenoid-operated, single disc brake with two friction surfaces. The braking force is applied by springs. The
braking torque is generated when no current is applied. The brake release is solenoid-operated. The brake operates with DC current.
The brake must be able to hold the nominal load in power free mode without any problems. For chain hoists with two brakes, the functio-
nality of the two brakes must be checked during the system acceptance test and tested periodically. The periodic examination takes place
annually by a service technician certified by the manufacturer.
The function test is described in Section 2.2.2. The verifiability of individual brakes is ensured by the control system constructor. A pattern
control scheme for a D8 PLUS electric chain hoist can be obtained from GIS.
The brake coil voltage must be the same as the operating voltage.
If the maximum air gap is reached (a max., table 3-3 and figure 3-1) reached, the lining and the brake disc must be replaced.
Designation
d
3 M
12 M Task
Remark
1. Load chain
x
x
Oil
Measure wear
see chapter
2.2.3 / 3.2.4
2. Brake system
x
x
Function check with load
see chapter 3.2.3
3. Electrical equipment
x
Function check
4. Fixing screws on suspension
parts and load hook with accessories
x
Check for cracks
Check screw torque
see chapter 3.2.9
5. Limit switch
x
Check switching elements
see chapter 2.2.4
6. Slipping clutch
x
Function check
see chapter 3.2.8
7. Leaktightness
x
Check screw torques of the covers
Check cable glands
see chapter 3.2.9
3.2.2 Maintenance overview
Table 3-2 Maintenance overview
Designation
d
3 M
12 M Task
Remark
1. Load chain
x
Visual check
Clean and lubricate as needed
see chapter 2.2.3
2. Lifting device and trolley
x
Check for abnormal noise / sealing
3. Electric power supply cable
x
Visual check
4. Limit switch
x
Function check
see chapter 2.2.4
5. Sealing
x
Visual check
6. Strain relief control cable
x
Visual check
3.2.1 Care overview
Table 3-1 Care overview
3.2 Care and maintenance
Care and maintenance intervals are defined as follows:
d (daily), 3 m (quarterly), 12 m (annually)
The predefined care and maintenance intervals should be reduced when the loading of the electric chain hoist is exceptionally large or
when frequently operated in adverse conditions (e.g. dust, heat, humidity, steam, etc.).
