SMA TCS 500-SC Maintenance manual - Manual (Page 16)

4 Disconnecting from and Reconnecting to Voltage Sources SMA Solar Technology AG
16 TCS-CP-WH-en-10 Maintenance manual
4.2 Disconnecting the Low Voltage
1. In case of a Transformer Compact Station with AC circuit breaker, switch off the AC circuit
breaker.
2. In case of a Transformer Compact Station without AC circuit breaker, switch off the AC circuit
breaker in the inverter and switch off the inverter.
3. Ensure that the AC circuit breaker and inverter cannot be accidentally switched on again.
4. Ensure that all poles are free of voltage.
5. Earth and short-circuit.
6. Cover or shield any adjacent live components.
4.3 Disconnecting the Medium Voltage
☐ Low voltage is disconnected.
1. Switch off the medium voltage using the medium-voltage switchgear (see the documentation for
the medium-voltage switchgear).
2. Ensure that the medium-voltage switchgear cannot be accidentally switched on again
(see the documentation for the medium-voltage switchgear). With some switchgear, it may be
necessary to first earth and short-circuit the medium-voltage switchgear.
3. Ensure that all poles are free of voltage.
4. Earth and short-circuit.
5. Cover or shield any adjacent live components.
4.4 Disconnecting the Control Voltage
1. Open station sub-distribution.
2. Switch off all miniature circuit-breakers and all residual-current devices.
3. Ensure that all miniature circuit-breakers and all residual-current devices cannot be accidentally
reconnected.
4. Disconnect the self-supply transformer if there is one.
5. Ensure that all poles are free of voltage.
6. Cover or shield any adjacent live components.
7. Close station sub-distribution.
4.5 Reconnecting the Medium Voltage
• Switch on the medium voltage using the medium-voltage switchgear (see the documentation for
the medium-voltage switchgear).