SMA SC 500CP-US Maintenance Manual - Manual (Page 13)

SMA America, LLC 2 Safety
Maintenance Manual SCCP-US-WH-US_en-30 13
Danger to life from electric shock if the inverter is damaged
Operating a damaged inverter can lead to hazardous situations that result in death or serious injuries due to electric
shock.
• Only use the inverter when it is technically faultless and in an operationally safe state.
• Regularly check the inverter for visible damage.
• Make sure that all external safety equipment is freely accessible at all times.
• Make sure that all safety equipment is in good working order.
• Wear Hazard Risk Category 2 personal protective equipment for all work on the inverter.
Danger to life from electric shock even if the inverter is disconnected on the AC and DC sides
The precharge unit of the option "Q at Night" is also live if the AC contactor and the DC switch are open. Touching live
components of this assembly will result in death or serious injury.
• Do not touch live components.
• Do not remove protective covers.
• Observe the warning messages.
• Wear personal protective equipment
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Danger to life from electric shock when the inverter is not locked
If the inverter is not locked, this means that unauthorized persons have access to components carrying lethal voltages.
Touching live components can result in death or serious injury due to electric shock.
• Always close and lock the inverter.
• Remove the keys from the door locks and from the key switch.
• Keep the keys in a safe place.
• Ensure that unauthorized persons do not have access to the PV plant.
Danger to life due to blocked escape routes
In hazardous situations, blocked escape routes can lead to death or serious injury. Opening the doors of two inverters
located opposite each other blocks the escape route. It is imperative that the escape route is freely accessible at all
times.
• An escape route of at least 3 ft. (915 mm) width must be available at all times. Make sure the minimum passage
width of the route meets local standards.
• Do not place any objects in the escape route area.
• Remove all tripping hazards from the escape routes.
• If two inverters have been installed facing each other, never open the doors of both inverters simultaneously.
Risk of fire due to failure to observe torque specifications on high-voltage bolted connections
Failure to follow the specified torques reduces the ampacity of live screw connections so that the contact resistances
increase. This can cause components to overheat and catch fire.
• Ensure that live screw connections are always executed with the exact torques specified in this document.
• Use suitable tools when working on the device.
• Avoid repeated tightening of live screw connections as this may result in inadmissibly high torques.
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