Fagor 2104, Quick Reference

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MQR-70/84 Fagor M odular Drives and Motors Q uick R eference. Ref.2104
Differential breaker
On a DDS system, fault DC current, practically flat, may come up
besides the AC currents and pulsating DC currents. This requires
the use of a differential breaker. This switch must be a B type
universal breaker of selective disconnection
.
As an alternative, “A type” differential signals may be used with
selective shut-off. They are more economical than the “B type” and
usually valid for DDS systems with a FAGOR filter.
The shut-off current must be equal or greater than 500 mA and with
selective switch-off.
Isolating transformer or auto-transformer
When the mains voltage must be isolated or adapted to the levels
required by the DDS system, it may be connected through an
isolating transformer or an auto-transformer. This element will also
help reduce the amount of harmonics on the line although it will not
guarantee the compliance with the EC regulation.
Hence it is possible to apply simultaneity factors and decrease the
power required by the transformer or auto-transformer. It is also highly
recommended to use auto-transformers instead of isolating
transformers when only an adaptation of the working voltages is
required.
Remember that if the isolating transformer is installed, depending on
its power and impedance, it may be required to install a second choke
in series with the one that musts be installed with XPS power supplies.
DISTRIBUTION DIAGRAMS
The distribution diagram being used must be taken into consideration
in order to determine the characteristics of the protection means
against electrical shocks, in case of failure (indirect contacts) and
against over-current, as well as the specifications of the devices in
charge of such functions. The distribution diagrams are established
according to the ground connections of the distribution network or of
mains, on one hand, and the of the grounds of the receiving
installation on the other.
Depending on the electric energy distribution network, there are three
types of diagrams: TN, TT and IT.
MANUFACTURER
PS-25B4
XPS-25
RPS-20
PS-65/PS-37-L
XPS-25B4
RPS-45
RPS-75
BUSSMANN
FWH45B RF00-125A -
XL50F-45A XL50F-125A -
RF-000-40A RF-000-125A -
40FE 100FE 160FEE (5700)
170M2611 170M1318 170M1319
170M3009 170M3013 170M3014
GOULD
A00-66C5D8 A00-66C125D8 -
A00-66C5D1 A00-66C125D1 -
FERRAZ
6.9 gRB 00
D08L 040
6.9 gRB 00
D08L 125
6.9 gRB 00
D08L 160
6.6 gRB 000
D08/040
6.6 gRB 000
D08/100
6.6 gRB 000
D08/160
SIBA 20 189 20- 50A 20 189 20- 125A 20 189 20-160A
WICKMAN
45FEE 140FEE -
SIEMENS
3NE8 003 3NE8 021 3NC8423-3
LITTELFUSE
-
L70S125 L70S150
WARNING. Actually, IGBT components cannot be
protected with fuses. Therefore, when using RPS-75
power supplies, the protection does not prevent the
module from breaking down. Using them minimizes the
number of components that may be damaged as a result
of a possible malfunction.
INFORMATION. It is not recommended to use differential
breakers sensitive to pulsating currents and, overall,
general purpose differential breakers. In this cases,
undesired stops might occur due to the high sensitivity of
those devices to pulsating currents.
MANDATORY. Never use AC type differential breakers.
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M A I N S
C O N N E C T I O N
- S 1
M A I N S
S W I T C H
- Q 1
D I F F E R E N T I A L
B R E A K E R
M A I N S F I L T E R
- K M 1
P O W E R
S W I T C H
D D S
- K M 1
- Q 1
- S 1
M A I N S F I L T E R
P O W E R
S W I T C H
D I F F E R E N T I A L
B R E A K E R
M A I N S
S W I T C H
M A I N S
C O N N E C T I O N
N
D D S
INFORMATION. When having a mains perfectly referred
to ground, autotransformers may be used to adapt the
mains voltage. However, if mains is not referred to
ground, an isolating transformer must be used in order to
avoid possible dangerous voltage surges on any phase
with respect to ground that could damage the equipment.
In this situation, the secondary must have a star
configuration with access to the middle point. This middle
point of the secondary must be connected to ground or
the neuter of mains.
INFORMATION. On systems with an XPS power supply,
the inductance of the transformer must be very low and
negligible against the inductive value of the choke XPS.
MANDATORY. When using transformers or auto-
transformers, the main contactor must be connected
between them and the DDS system, never on the input
line of the transformer or autotransformer.
MANDATORY. On machines where the DDS system
includes XPS power supplies, it is essential to properly
size the transformer or auto-transformer. The rated
(nominal) power of the auto-transformer is the result from
the formula
Pn=1.4·Pmax , where Pmax is the maximum
braking power of the system. This power may be, in
general, close to the power in the S6 duty cycle of the
asynchronous spindle motor.
MANDATORY. For systems with XPS power supplies,
install isolating transformers ONLY when the type of
mains so requires.
WARNING. Not complying with the previous indications
could cause the DDS system to perform poorly.
INFORMATION. When in a system with XPS power
supply, the pulses of the drives are activated, a very low
frequency blinking (flashing) may be observed on the
amber LED of energy regeneration to mains. THIS
BEHAVIOR IS NORMAL and does NOT indicate that the
system is not working properly. Deactivating the pulses,
the LED will stop blinking.
Note. that the diagrams provided here do not show the main
contactor - KM1 that must be connected between the transformer
or auto-transformer and the DDS system.
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