Measures To Be Taken To Satisfy The Ul/Csa Standards; Caution In Installing The Inverter; Caution In Wiring; Caution As To Peripheral Devices - Toshiba TOSVERT VF-AS1 Instruction Manual

(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 noise cut plate on which the inverter is installed and connect another cable to it. (Refer to Fig.
4.) See the Table 4 for earth cable sizes.
(3) Install a non-fuse circuit breaker on the input side of the inverter.
9.2

Measures to be taken to satisfy the UL/CSA standards

All VF-AS1 series inverters are certified by UL and CSA, and have nameplates with UL and CSA markings.

9.2.1 Caution in installing the inverter

A UL certificate was granted on the assumption that the inverter would be installed in a cabinet. Therefore, install the
inverter in a cabinet and if necessary, take measures to maintain the ambient temperature (temperature in the cabinet)
within the specified temperature range.
For models designed for 15kW motors or smaller, if the seal on the top of the inverter is removed, the ambient
temperature can rise to 50°C in some cases, although the maximum allowable ambient temperature is 40°C.
Incidentally, models (with no seal on the top) designed for 18.5 kW motors or larger can be used at ambient
temperatures of up to 50°C.

9.2.2 Caution in wiring

9
For electric wires to be connected to the inverter's input terminals (R/L1, S/L2, T/L3), output terminals (U/T1, V/T2,
W/T3) or other main circuit terminals, use UL-certified electric wires (copper wires with conductors for which the
maximum allowable temperature is 75°C or over) and round solderless terminals and tighten the terminal screws to
the specified torque when connecting the wires to the terminal board. To crimp a round solderless terminal onto a wire,
use a crimping tool recommended by the terminal manufacturer.
⇒ For recommended electric wire sizes, solderless terminals and crimping tools, see Tables 4 and 5.

9.2.3 Caution as to peripheral devices

When installing a no-fuse circuit breaker or a fuse box on the primary side of the inverter, use UL-certified one. (If a
fuse is needed, use a E-range.)
The UL certification test on this inverter was conducted under the power supply short-circuit current* conditions shown
in Table 3 (*: current that flows in the event of a short-circuit in the power supply). Note that power supply short-circuit
currents vary depending on the capacity of the motor used.
Applicable motor
(kW)
0.4~37
45~132
160~280
Inverter
Grounding Install an earth terminal.
terminal
Noise cut plate
Table 3 Power supply short-circuit current and maximum input voltage
Power supply short-circuit current
(A)
5,000
10,000
18,000
Fig. 4
Max. input voltage (V)
200V class
240
I-6
E6581301
400V class
480