SMA MEDIUM VOLTAGE POWER STATION 500SC-JP - Checking the AC Disconnection Unit

Danger to life due to electric shock or electric arc if live components are touched
If the MVPowerStation and its devices are not correctly disconnected, dangerous voltages may be present in the
components which, if touched, will result in death or serious injury.
• Disconnect the MVPowerStation (see Section7.6, page101).
• After switching off the inverter, wait at least 15minutes before opening it to allow the capacitors to discharge
completely.
• Ensure that the MVPowerStation and its devices are voltage-free.
Procedure:
1. Switch the inverter to Stop (see Section7.4.1, page100).
2. Connect the supply voltage (see Section7.9.1, page103).
3. Measure the voltage at the supply voltage output between L1 and N.
☑ The voltage is approximately 230V.
✖ Voltage deviates significantly?
• Contact Service partner.
4. Measure the voltage at the supply voltage output of the UPS at -X400 terminal5 and -X402 terminal5.
☑ The voltage is approximately 24V.
✖ Voltage deviates significantly?
• Contact Service partner.
5. Disconnect the supply voltage (see Section7.4.4, page100).
6. Measure the time until the communication unit switches off.
☑ The communication unit switches off after 15seconds at the earliest.
✖ The communication unit switches off earlier?
• Contact Service partner.
10.5.11 Checking the AC Disconnection Unit
The inverter is optionally equipped with an AC disconnection unit. If a circuit breaker manufactured by ABB is installed,
it needs to be checked. If a circuit breaker by LS Industrial Systems is installed, no checking is necessary.
10 Maintenance
SMA Solar Technology AG
System ManualMVPS22JP-SH-en-11154