62
In case of power failure in MR systems, the anti-creeping device can be opened
manually or with the appropriate accessory.
To avoid delays in the intervention of the anti-creeping device during normal
operation of the lift (e.g. power failure during operation or opening of the safety
chain during operation) it is recommended to insert a delay circuit by means of a
capacitor. This allows the device to engage after the lift has stopped (typically a
couple of seconds).
The delay must not occur during normal operation of the device. The delay-capa-
city correspondence is expressed in Tab. 5.
DELAY TIMES FOR THE ELECTROMAGNETIC ACTUATOR WHEN POWER
SUPPLY IS SWITCHED OFF.
Coil
12 Vdc
24 Vdc
48 Vdc
207 Vdc
C[mF]
Delay
C[mF]
Delay
C[mF]
Delay
C[mF]
Delay
s
s
s
s
---
0,02
---
0,02
---
0,02
---
0,02
Recircula-
tion diode
0,1
Recircula-
tion diode
0,13
Recircula-
tion diode
0,1
Recircula-
tion diode
0,1
40
0,7
10
1,00
4,7
1,5
0,34
2,2
80
1,3
20
2,00
9,4
3
0,68
4,4
100
1,7
30
3,00
14,1
4,5
1,36
9
120
2
40
4,00
-
-
-
-
150
2,5
50
5,00
-
-
-
-
Tab. 5
see:
Fig. 19 - Par. 7.5 Emergency manoeuvre with anti-creeping device
Содержание RQ 200
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