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E6581381
I-5
9
EN 50178 applies to electrical equipment intended specially for use in power installations, and sets out the
conditions to be observed for electric shock prevention when designing, testing, manufacturing and installing
electronic equipment for use in power installations.
9.1.4 Measures to satisfy the low-voltage directive
When incorporating the inverter into a machine or system, it is necessary to take the following measures so that
the inverter satisfies the low-voltage directive.
(1) Install the inverter in a cabinet and ground the inverter enclosure. When doing maintenance, be extremely
careful not to put your fingers into the inverter through a wiring hole and touch a charged part, which may
occur depending on the model and capacity of the inverter used.
(2) Do not connect two or more wires to the main circuit earth terminal of the inverter. If necessary, install an
additional earth terminal on the metal plate on which the inverter is installed and connect another cable to it.
Or install the EMC plate (attached as standard) and another cable connect to earth terminal on the EMC
plate. Refer to the table 10.1 for earth cable sizes.
(3) Install a non-fuse circuit breaker or a fuse on the input side of the inverter.
9.2 Compliance with UL Standard and CSA Standard
The VF-FS1 models, that conform to the UL Standard and CSA Standard have the UL/CSA mark on the
nameplate.
9.2.1 Compliance with Installation
The VF-FS1 inverter must be installed in a panel, and used within the ambient temperature specification.
⇒ See section 1.4.4.
9.2.2 Compliance with Connection
Use the UL conformed cables (Rating 75 °C or more) to the main circuit terminals (R/L1, S/L2, T/L3, U/T1, V/T2,
W/T3).
Refer to the table of next page about wire sizes.
9.2.3 Compliance with Peripheral devices
Use the UL listed fuses at connecting to power supply.
Short circuit test is performed under the condition of the power supply short-circuit currents in below.
These interrupting capacities and fuse rating currents depend on the applicable motor capacities.