Disconnecting The Battery From Voltage Sources - SMA COMMERCIAL STORAGE SOLUTION 30 System Manual

SMA Solar Technology AG
11.2

Disconnecting the Battery from Voltage Sources

Danger to life due to electric shock when live components or DC cables are touched
The DC cables connected to a battery may be live. Touching live DC cables results in death or serious injury due to
electric shock.
• Have the inverter and the battery mounted, installed and commissioned only by qualified persons with the
appropriate skills.
• Disconnect the system from voltage sources and make sure it cannot be reconnected before working on the
device.
• Do not touch non-insulated parts or cables.
• Wear suitable personal protective equipment for all work on the product.
Danger to life due to electric shock from destruction of the measuring device due to
overvoltage
Overvoltage can damage a measuring device and result in voltage being present in the enclosure of the measuring
device. Touching the live enclosure of the measuring device results in death or lethal injuries due to electric shock.
• Only use measuring devices with a measurement ranges designed for the maximum AC and DC voltage of the
inverter.
• Only use measuring devices with measurement ranges designed for the maximum DC voltage of the battery.
Risk of injury due to electric shock after decommissioning.
Voltages of 60 V can be present at the DC intermediate circuit between the battery and inverter even after the
battery is decommissioned. Touching live components in the DC intermediate circuit can result in injury, even if the
voltage in question is low.
• Do not touch any live components in the DC intermediate circuit.
Procedure:
1. Disconnect the inverter from all voltage sources (see Section 11.1, page 119).
2. Switch off the external switch on the outside of the battery cabinet
door.
System Manual
DANGER
WARNING
CAUTION
11 Disconnecting from voltage sources
ESSX-20-SH-en-10 121