Appendix G Conformity with Standards
Appendix-39
G.3 Compliance with UL Standards and Canadian Standards (cUL certification)
( )
Originally, the UL standards were established by Underwriters Laboratories, Inc. as private criteria for
inspections/investigations pertaining to fire/accident insurance in the USA. Later, these standards were authorized
as the official standards to protect operators, service personnel and the general populace from fires and other
accidents in the USA.
cUL certification means that UL has given certification for products to clear CSA Standards. cUL certified products
are equivalent to those compliant with CSA Standards.
■ Notes
UL/cUL-listed inverters are subject to the regulations set forth by the UL standards and CSA standards (cUL-listed
for Canada) by installation within precautions listed below.
Integral solid state short circuit protection does not provide branch circuit protection. Branch circuit protection
must be provided in accordance with the National Electrical Code and any additional local codes.
1. Solid state motor overload protection (motor protection by electronic thermal overload relay) is provided in
each model.
Use function codes F10 to F12 to set the protection level, refer to the description below.
F10 Electronic thermal overload
protection for motor 1
(Select motor characteristics)
1: Enable (For a general-purpose motor with self-cooling fan)
2: Enable (For an inverter-driven motor with separately powered cooling fan)
F11 (Overload detection level) 0.00 (disable),
current value of 1 to 135% of inverter rated current
(Inverter rated current dependent on F80)
F12 (Thermal time constant) 0.5 to 75.0 min, Refer to the graph below.
(Output current / Detection level current) × 100 (%)
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