YASKAWA LA500, Technical Manual

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3.1 Section Safety
40 YASKAWA SIEPYEULA5001C LA500 Technical Manual
3.1 Section Safety
DANGER
Electrical Shock Hazard
Do not examine, connect, or disconnect wiring on an energized drive. Before servicing,
disconnect all power to the equipment and wait for the time specified on the warning label at a
minimum. The internal capacitor stays charged after the drive is de-energized. The charge
indicator LED extinguishes when the DC bus voltage decreases below 50 Vdc. When all
indicators are OFF, measure for dangerous voltages to make sure that the drive is safe.
If you do work on the drive when it is energized, it will cause serious injury or death from electrical shock.
WARNING
Electrical Shock Hazard
Do not operate the drive when covers are missing. Replace covers and shields before you
operate the drive. Use the drive only as specified by the instructions.
Some figures in this section include drives without covers or safety shields to more clearly show the inside of the
drive. If covers or safety shields are missing from the drive, it can cause serious injury or death.
Ground the neutral point on the power supply of drive models BxxxE, 2xxxE, and 4xxxE to
comply with the EMC Directive before you turn on the EMC filter or if there is high resistance
grounding.
If you turn ON the EMC filter, but you do not ground the neutral point, it can cause serious injury or death.
Make sure that the protective ground wire complies with technical standards and local safety
regulations. The EN 61800-5-1:2007 standard specifies that you must wire the power supply to
automatically de-energize when the protective ground wire disconnects. If you turn on the
internal EMC filter, the leakage current of the drive will be more than 3.5 mA. Use the closed-
loop crimp terminal to connect a protective ground wire that has a minimum cross-sectional
area of 10 mm
2 (copper wire).
If you do not obey the standards and regulations, it can cause serious injury or death.
When there is a DC component in the protective earthing conductor, the drive can cause a
residual current. When a residual current operated protective or monitoring device prevents
direct or indirect contact, always use a type B Residual Current Monitor/Residual Current
Device (RCM/RCD) as specified by IEC/EN 60755.
If you do not use the correct RCM/RCD, it can cause serious injury or death.
Do not wear loose clothing or jewelry when you do work on the drive. Tighten loose clothing
and remove all metal objects, for example watches or rings.
Loose clothing can catch on the drive and jewelry can conduct electricity and cause serious injury or death.
Do not remove covers or touch circuit boards while the drive is energized.
If you touch the internal components of an energized drive, it can cause serious injury or death.
Only let approved personnel install, wire, maintain, examine, replace parts, and repair the drive.
If personnel are not approved, it can cause serious injury or death.
Do not modify the drive body or drive circuitry.
Modifications to drive body and circuitry can cause serious injury or death, will cause damage to the drive, and
will void the warranty. Yaskawa is not responsible for modifications of the product made by the user.
Fire Hazard
Tighten all terminal screws to the correct tightening torque.
Connections that are too loose or too tight can cause incorrect operation and damage to the drive. Incorrect
connections can also cause death or serious injury from fire.
Tighten screws at an angle in the specified range shown in this manual.
If you tighten the screws at an angle not in the specified range, you can have loose connections that can cause
damage to the terminal block or start a fire and cause serious injury or death.