Moog MSD G393-004, Operation Manual, Page: 53 / 90

moog
MSD Servo Drive DC-AC Operation Manual
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Supply with
AC-AC drives
53
Id.-No.: CA97554-001 Date: 06/2012
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7 Operation with AC-AC
servo drive as supply
NOTE: Project planning
For assistance in choosing the optimum operation mode (with power supply
unit or AC-AC servo drive) refer to appendix starting on page 59.
ATTENTION!
Refer to the AC-AC servo drive operation manual!
When constructing a multi-axis system with AC-AC servo drives as the supply
source, be sure to refer to the „MSD Servo Drive AC-AC Operation Manual“
(Id. no. CA65642-001).
7.1 Layout of devices and components
The placement of components in the switch cabinet is a key factor in operating the plant
and machinery of the multi-axis system without disturbance. So be sure to observe the
following points when planning:
• The “Notes for installation“ on page 11 and the “Notes for installation” on
page 19 ff. apply without restriction.
Also note the following points:
• Assess the assemblies used in terms of their electromagnetic compatibility.
• Then divide the switch cabinet into zones of differing power and interference
levels and group the modules accordingly.
!
• Keep units susceptible to interference at a minimum clearance of 0.2 metres from
the following components:
− Servo drive
− Input and output reactors
− Transformers
− Mains, motor, DC power supply and braking resistor cables (even if shielded)
− Relays and contactors (even if interference-suppressed)
• The mains filter must be sealed tight as far as possible at the AC-AC servo drive
(Size 1 to Size 4) or be mounted on the backing plate across a wide area at the
feed-in point (Size 5 to Size 7).
• The backing plate must have a low-resistance connection to the central grounding
point.
• No unshielded cables may be routed on the mains input side of the filter, to pre-
vent interference.
• Do not use fluorescent lamps in switch cabinets, as they emit high-frequency
interference.
ATTENTION! Device protection
When installing a multi-axis system with an AC-AC servo drive as the supply,
note the following points relating to device protection:
• Mains fuses
−
Size 1 to Size 5
The mains fuses should always be installed additional to the motor pro-
tection switch and prevent destruction of the device (e.g. in the case of a
component defect or overload). Use mains fuses (duty class gG) to isolate
all poles of the servo drive from the mains supply. For more details refer
to MSD Servo Drive AC-AC Operation Manual (Id. no. CA65642-001) in
the “Electrical installation” section.
−
Size 6 to Size 7
Instead of mains fuses of utilisation class gG, semiconductor fuses of
utilisation class gRL (gS) are to be used. As this type of fuse is a full-range
fuse it offers protection for the devices and the cabling. As a result the
motor protection switch is not required.
!