Characteristics; Braking Moments; Electromagnets - Emerson Leroy-Somer FFB Series Maintenance Manual

Brake motors
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5 - CHARACTERISTICS

5.1 - Braking moments

The braking moment is defined according to the number of springs and their colour, based on the values indicated in the table
below.
Running-in: All brake linings, complete brake (Brake disk only: see section 3.2) are already run-in in the factory before assembly
onto the motor. The dynamic braking moment indicated is optimum (tolerance -10 to +40 %).
Braking moments (N.m) specified for information; in case of normative restriction, please consult us.
FFB1
Nbr of
Colour
springs
3
4
5
Purple
(RAL 4008)
6
7
8
9
-
10
-

5.2 - Electromagnets

As certain direct current coils are difficult to differentiate by
their dimension, measure the coil's resistance using an
Ohmmeter on an appropriate calibre and compare with the
value indicated in the table below.
These values are theoretical, calculated for an ambient
temperature of +20°C.
Characteristics of the electromagnets ±5 %, at +20°C
180V coil
ESFR VMA 31 to 34
Type
Intensity
Resistance
brake
A
Ω
FFB1
0.232
776
FFB2
0.295
610
FFB3
0.345
522
FFB4
0.339
530
FFB5
0.547
329
26
FFB2
M
M
Colour
f
(N.m)
(N.m)
4.5
11
6
15
7.5
19
White
(RAL 1013)
9
23
10.5
26
12
30
-
-
-
-
-
-
20V coil
Power
Intensity
Resistance
W
A
Ω
42
1.974
10.1
53
2.633
7.6
62
2.793
7.2
61
3.602
5.6
98
4.211
4.8
CHARACTERISTICS
FFB3
M
Colour
f
f
(N.m)
-
-
-
-
37
45
52
Orange yellow
(RAL 2000)
59
67
74
Power
W
39
53
56
72
84
FFB4
M
Colour
Colour
f
(N.m)
41
55
69
Brown
(RAL 8017)
83
96
Black
110
(RAL 9005)
-
-
-
-
FFB Brake Motors Maintenance Guide
5287 en - 2015.04 / a
FFB5
M
f
(N.m)
-
-
-
-
-
-
120
140
160
180
200

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