R250 A.v.r; Characteristics; U/F Fonction And Lam - SDMO RENTAL POWER R550C2 User And Maintenance Manual

LEROY-SOMER

2 - R250 A.V.R.

2.1 - Characteristics

- Storage: -55°C; +85°C
- Operation: -40°C; +70°C
- Voltage regulation: around ± 0,5 %.
- Supply range/voltage detection 85 to 139 V
(50/60Hz).
- Rapid response time (500 ms) for a
transient voltage variation amplitude of
± 20 %.
- Voltage setting P1.
- Stability setting P2.
- Power supply protected by 8 A fuse,
replacement product: Ferraz-Shawmut
T084013T fast-blow fuse, 8 A FA 250 V,
breaking capacity 30 kA.

2.2 - U/F Fonction and LAM

The threshold position (50 Hz - 60 Hz) to
action the U/F fonction as well as the LAM
setting type is selected using the
potentionmeter.
KNEE
47.5Hz
LAM OFF 9
SPECIAL
8
KNEE
65Hz
7
LAM OFF
6
KNEE
57Hz
LAM OFF
WARNING: The jumper settings must
correspond to the rated operating
frequency (see the nameplate on the
alternator).
Risk of destruction for the alternator.
Installation and maintenance
50Hz
LAM
o
OFF
1
13%
0
2
25%
OFF
3
13%
4
5
25%
60Hz
LAM
R250
A.V.R.
The threshhold position and LAM fonction
settings are done with the jumper.
Operating at 50 Hz: (U/F gradient)
0: threshold at 48 Hz without LAM for impacts
between 30 and 40% of the rated load.
1: threshold at 48 Hz with LAM 13% for
impacts between 40 and 70% of the rated
load.
2: threshold at 48 Hz with LAM 25% for
impacts > 70% of the rated load.
Operating at 60 Hz: (U/F gradient)
3: threshold at 58 Hz without LAM for impacts
between 30 and 40% of the rated load.
4: threshold at 58Hz with LAM 13% for
impacts 40 and 70% of the rated load.
5: threshold at 58Hz with LAM 25% for
impacts > 70% of the rated load.
Specific operating
6: threshold at 57Hz without LAM for speed
variations at a steady state > 2 Hz
7: threshold at 65Hz without LAM for variable
speed and tractelec / gearlec (U/F
gradient).
8: special: the factory setting 48Hz 2U/F
gradient ; a special programme is possible
on request. This programme must be
specified before ordering, during the project
study.
9: threshold at 47.5 Hz without LAM for
speed variations at a steady state > 2 Hz.
For hydraulic applications, it is advisable to
select:
- position 0 for 50 Hz
- position 3 for 60 Hz
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