Annex to the EC Type-Examination Certificate
No. EU-BD 862 of 2016-03-18
Note:
The English text is a translation of the German original. In case of any discrepancy, the German version is valid only.
Page 1 of 2
1
Scope of application
1.1
Use as braking device
–
part of the the protection device against overspeed for the car mov-
ing in upwards direction
–
permissible brake torques and tripping rotary speeds
1.1.1
Permissible brake torque when the braking device acts on the shaft of the traction sheave while the
car is moving upwards
Type
Nominal brake
torque* [Nm]
Maximum tripping rotary speed of the
traction sheave
[rpm]
BFK464-18S.2
2 x 165 = 330
455
BFK464-18S
2 x 195 = 390
800
BFK464-18S
2 x 225 = 450
455
1.1.2
Maximum tripping speed of the overspeed governor and maximum rated speed of the lift
The maximum tripping speed of the overspeed governor and the maximum rated speed of the lift
must be calculated on the
basis of the traction sheave’s
maximum tripping rotary speed as outlined
above taking into account traction sheave diameter and car suspension.
v =
n
i
v
= Tripping (rated) speed (m/s)
D
TS
=
iameter of the traction sheave from rope’s center to rope’s center (m)
= 3,14
n
= Rotary speed (rpm)
i
= Ratio of the car suspension
1.2
Use as braking element
–
part of the protection device against unintended car movement (act-
ing in up and down direction)
–
permissible brake torques, tripping rotary speeds and charac-
teristics
1.2.1
Nominal brake torques and response times with relation to a brand-new brake element
Type
Nominal brake
torque* [Nm]
Maximum tripping
rotary speed [rpm]
Maximum response times**
[ms]
without / with overexcitation
t
10
t
50
t
90
BFK464-18S.2
2 x 165 = 330
455
39 / 43
66 / 71
94 / 99
BFK464-18S
2 x 195 = 390
800
27 / 32
46 / 52
65 / 72
BFK464-18S
2 x 225 = 450
455
27 / 32
46 / 52
65 / 72
Interim values can be interpolated
Explanations:
* Nominal brake torque:
Brake torque assured for installation operation by the safety component manufac-
turer.
** Response times:
t
X
time difference between the drop of the braking power until establishing X% of
the nominal brake torque, t
50
optionally calculated t
50
= (t
10
+ t
90
)/2 or value taken from
the examination recording
Summary of Contents for WSG-TB.3 series
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