BAST_
02.FM
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1 Safety instructions
1.6 Electrical equipment
Chain hoists, models ST05, ST10, ST20, ST30, ST32, ST50 and ST60, can be supplied
with various versions of electrical equipment.
The chain hoist functions with dangerous electrical voltages.
• Disconnect the chain hoist before opening covers marked with this symbol.
• The chain hoist may only be opened by qualified personnel (see page 2) or person-
nel having been instructed.
a) Direct control:
The motor of the chain hoist is switched on and off directly, i.e. without the use of
contactors. Mains voltage and mains current are present in the control pendant. Due
to the limited ampacity of the control pendants, direct control is only available up to
1.6 kW motor output at 400 V, 3 ph, 50 Hz. Direct control is not permissible in various
countries (e.g. Canada, U.S.A.) due to legal stipulations and standards.
b) Contactor control:
The motor of the chain hoist is switched by means of a contactor-transformer combi-
nation.
A safety extra-low voltage is present in the control pendant.
Contactor control is available for all motor sizes and outputs and is accepted world-
wide. The control voltage generated by the transformer is selected corresponding to
customer requirements and national standards. 48 V or 230 V control voltage is gene-
rally used in Europe, 120 V in North America.
c) Version without control:
STAHL chain hoists are available without control. The switchgear (e.g. contactors
and transformer) are then not supplied. The rectifier for activating the brake remains
part of the supply.
Safety note: if the hoist is supplied without control, it is recommended that the custo-
mer install a phase monitoring relay. If the control is not installed in the terminal box
on the chain hoist, but in a control cabinet for example, a phase monitoring relay is
obligatory.
If the control is supplied by others, or work carried out on the control, the braking
function must be tested.
1.7 Warranty
• The warranty will become invalid if these operating instructions are not observed
for installation, operation, inspection and maintenance.
• Repairs and elimination of faults within the scope of the warranty may only be per-
formed by qualified personnel (see page 2) after the manufacturer/supplier has
been consulted and has given his approval.
The warranty will become invalid if the hoist is modified or original spare parts not
used.
1.8 Periodic tests
Hoists and cranes must be inspected by a
qualified person,
see page
2, at least once
a year. The results of the test must be recorded and filed in the test log book.
The remaining service life of the hoist acc. to FEM 9.755 must also be established
during this inspection.
The periodic tests must be adapted to the hoist’s use. Intensive use entails shorter
maintenance intervals.
All tests must be initiated by the user, see page 2.
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