YASKAWA L1000V Technical Manual page 39

Improper equipment grounding may cause dangerous electrical potentials on equipment chassis, which could
result in death or serious injury.
Always use a ground wire that complies with technical standards on electrical equipment and minimize the length of
the ground wire.
Make sure all ground terminals have been properly grounded.
Always ground the ground terminal. (200 V Class: Ground to 100 Ω or less, 400 V Class: Ground to 10 Ω or less).
Comply with proper wiring practices.
The motor may run in reverse if the phase order is backward, causing incorrect elevator direction movement and injury
to personnel.
Connect motor input terminals U, V and W to drive output terminals U/T1,V/T2, and W/T3. The phase order for the
drive and motor should match.
Install a properly controlled contactor on the input-side of the drive for applications where power should be
removed from the drive during a fault condition.
Improper equipment sequencing could result in death or serious injury.
Do not connect the AC power line to the output motor terminals of the drive. Failure to comply could result in
death or serious injury by fire as a result of drive damage from line voltage application to output terminals.
• Do not connect AC line power to output terminals U, V, and W.
• Make sure that the power supply lines are connected to main circuit input terminals R/L1, S/L2, T/L3 (or R/L1 and S/
L2 for single-phase power).
Install a properly controlled contactor on the input-side of the drive for applications where power should be
removed from the drive during a fault condition.
Improper equipment sequencing could result in death or serious injury.
Install adequate branch circuit short circuit protection per applicable codes.
The drive is suitable for circuits capable of delivering not more than 100,000 RMS symmetrical amperes, 240 Vac
maximum (200 V Class) and 480 Vac maximum (400 V Class). Inadequate branch short circuit protection could result
in damage to the drive.
Tighten all terminal screws to the specified tightening torque.
Loose electrical connections could result in death or serious injury by fire due to overheating of electrical connections.
Improperly tightened terminal screws can also cause erroneous equipment operation.
Do not use improper combustible materials in drive installation.
Failure to comply could result in death or serious injury by fire.
Attach the drive or braking resistors to metal or other noncombustible material.
Do not use an improper voltage source.
Failure to comply could result in death or serious injury by fire. Verify that the rated voltage of the drive matches the
voltage of the incoming power supply before applying power.
The braking resistor connection terminals are B1 and B2. Do not connect a braking resistor directly to any
other terminals.
Improper wiring connections could result in death or serious injury by fire.
Carrying the drive by the front cover may cause the main body of the drive to fall, resulting in minor or
moderate injury.
Always hold the case when carrying the drive.
YASKAWA EUROPE SIEP
W ARNING
Fire Hazard
CAUTION
Crush Hazard
YASKAWA AC Drive L1000V Technical Manual
3.1 Section Safety
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