SMA SC 500CP XT Service Manual - Manual (Page 8)

2 Safety SMA Solar Technology AG
8 SCCPXT_EZE-SG-en-11 Instructions for the Protection Test of the Power-Generating Unit
Danger to life from electric shock due to damaged product
Operating a damaged product can lead to hazardous situations that result in death or serious injuries due to electric
shock.
• Only operate the product when it is in a flawless technical condition and safe to operate.
• Check the product regularly 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 suitable personal protective equipment for all work on the product.
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Danger to life from electric shock when entering the PV field
The ground-fault monitoring with GFDI does not provide protection from personal injury when the ground-fault
monitoring is activated. PV modules which are grounded with ground-fault monitoring discharge voltage to ground.
Entering the PV field can result in lethal electric shocks.
• Ensure that the insulation resistance of the PV field exceeds the minimum value. The minimum value of the insulation
resistance is: 1 kΩ.
• Before entering the PV field, switch the PV modules to insulated operation.
• Configure the PV power plant as a closed electrical operating area.
Danger to life from electric shock if the product is not locked
If the product is not locked, unauthorized persons will have access to live components carrying lethal voltages. Touching
live components can result in death or serious injury due to electric shock.
• Always close and lock the product.
• Remove the keys.
• Keep the keys in a safe place.
• Ensure that no unauthorized person has access to the closed electrical operating area.
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
Sunny Central 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 must be available at all times. Make sure the minimum passage width of the escape route meets
local standards.
• Do not place any objects in the escape route area.
• Remove all tripping hazards from escape routes.
Risk of fire due to failure to observe torque specifications on live bolted connections
Failure to follow the specified torques reduces the ampacity of live bolted connections so that the contact resistances
increase. This can cause components to overheat and catch fire.
• Ensure that live bolted connections are always tightened with the exact torque specified in this document.
• Only use suitable tools when working on the device.
• Avoid repeated tightening of live bolted connections as this may result in inadmissibly high torques.
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