
5. INSTALLATION
B–65162E/03
118
Basic insulation is also used between the power supply main circuit
and aluminum flange (integrated with a heatsink). Connect the
protective ground wire to the ground terminal of the lower aluminum
flange as described in Section 5.2.3.
(2) Installation category (overvoltage category)
DIN VDE 0110 [Insulation coordination of electric apparatuses]
classifies power supply facilities by the impulse voltage (relative to
ground) in the power supply to which the amplifier is connected.
This amplifier series is designed as a device of installation category
(overvoltage category) II.
The layout of this amplifier series has been designed on the
assumption that the rated impulse withstand voltage (impulse voltage
relative to ground) in the power supply to which the amplifier is
connected is 2.5 kV
or lower.
If an impulse greater than 2.5 kV, relative to ground, appears in the
power supply, it must be suppressed.
Generally, this requirement is considered to be satisfied if an
insulated transformer is used in the power supply input section of a
machine.
If an insulated transformer is not used, install a surge protector
(lightning surge absorber) between the facility and ground to suppress
any impulse higher than 2.5 kV, relative to ground.
(3) Contamination class of the installation environment and power
magnetics cabinet protection level
EN 60204–1 (13. Control devices/13.3 Protection level) requires
that, when a machine is installed in an environment equivalent to the
general plant level, the protection level against dust, coolant, chips,
and so forth be IP54 or higher.
For a power magnetics cabinet that satisfies this requirement, the
contamination class within the cabinet is considered to be class 2.
The insulation of this amplifier series has been designed on the
assumption that the amplifier is installed in an environment of
contamination class 2.
When using the amplifier in a general machine installation
environment, install the amplifier in a power magnetics cabinet that
satisfies the requirements of protection level IP54.
The IP level, however, depends on the environment (atmosphere) in
which a machine is installed. Select the protection level of the power
magnetics cabinet according to the environment.
For an external heatsink cooling type amplifier with a heatsink fin
protruding from the rear of the mounting flange, the fin section should
be in a cooling area (duct) of about IP22 to 33, and special
considerations should be taken not to protect the fin from direct
coolant splashes or chips.