To reduce the acceleration of the elevator, we recommend short-circuiting the motor windings for the
evacuation. The short-circuit is generated by the motor contactors or an electronic circuit, as in the
frequenzy inverter type ZAdyn 4C. This is always effective even in the event of a power failure.
The short-circuit generates a speed-dependent braking torque. The maximum braking torque is
achieved at lower speeds.
Depending on the system type and weight ratios, it is possible that due to the short-circuit
generated braking torque is not suf
fi
cient to limit the lift speed. So the speed must be
monitored closely during evacuation and evacuation interrupted if necessary.
Releasing of the brake can be ended when a
fl
oor is reached. Now the elevator door can be opened
with a triangular key.
The elevator manufacturer's safety instructions have priority!
6.5.2
Releasing of the brake with the lever for hand release
A brake with a mechanical hand release system is available optionally. The hand release system
cannot be
fi
tted later. The complete brake must be replaced to retro
fi
t the hand release system.
The brake circuits can be released separately from each other with a mechanical hand release
system.
The levers for hand release can be attached in 45
°
steps.
Figure 6-5-2-01
Possible insertion positions
of the levers for hand release
Figure 6-5-2-02
Brake not opened
Example for hand release lever position
Figure 6-5-2-03
Brake manuell released
Example for hand release lever position
"
Attach the levers for hand release to the brake in any position.
"
The brake is released via simultaneous movement of both levers for hand release. The direction is
not of any signi
fi
cance in this regard.
"
The brake is fully open at an angle of approx. 20
°
- 25
°
.
Danger!
Operate the hand release system carefully.
Operating the hand release system starts movement of the loads.
Info
Carefully operate the lever for hand release until the traction sheave or the car starts to move.
A signi
fi
cant increase in the force exerted on the levers for hand release can result in irreparable
damage to the components.
6.5.3
Releasing the brake with electric emergency power supply (UPS)
By means of an uninterruptible power supply (UPS) the brake can be opened electrically. For this
purpose, for example, the existing dual circuit testing buttons can be used.
See
“
Brake control principle circuit diagram
”
in the Brake - Brake control chapter.
6.5.4
Automatic emergency evacuation
The automatic emergency evacuation is described in the operation instructions of the control, the
frequency inverter and, if available, an evacuation unit with UPS.
Translation of the original operating instructions
ZAtop
–
model series SM200.40E/SM200.45E
Commissioning
A-TBA21_01-GB 2021/30 Index 003 Part.-No. 01013507-GB (EU-BD 1112)
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