SMA SI 3.0-11 Quick Reference Guide V.3.0 - Manual (Page 44)

7 Commissioning SMA Solar Technology AG
44 Ersatzstrom-IS-en-30 Installation - Quick Reference Guide
7.2 Testing the Automatic Transfer Switch Function
The sequence of the test applies to all types of automatic transfer switches and is independent of the automatic transfer
switch installed. Ignore tests for non-existent devices.
Requirements:
☐ In the automatic transfer switch, all circuit breakers F1, F3, …, F6 must be open.
☐ The residual-current devices F2 and F7 must be closed.
☐ All Sunny Island inverters must be switched on but not operational.
☐ PV system and all loads at connection X2 must be disconnected from voltage sources.
Procedure:
1. Open the automatic transfer switch and ensure that at connection X1, there is voltage present and a right-hand
rotating magnetic field.
2. Measure whether the individual terminals are voltage-free:
3. Check whether the grounding device is correctly wired:
☑ The basic configuration is complete.
If an SD memory card is inserted in the Sunny Remote Control, the message
Do not remove MMC/SD memory card ... appears.
Close the circuit breaker F1 and the residual-current device F2 in the distribution board
and leave the Sunny Island switched on, but do not start it.
:$51,1*
Danger to life from electric shock due to live voltage
During the test, high voltages are present in the automatic transfer switch. Touching live components can result in death
or serious injury.
• Ensure that you do not touch any live components while measuring and testing.
• Disconnect the automatic transfer switch from voltage sources while you are eliminating any faults.
Check point Task
Connection X2 If AC voltage is present, correctly wire contactors Q1 and Q2.
Connection X3 If AC voltage is present, stop the Sunny Island.
Connection X4 If AC voltage is present, correctly wire circuit breaker F1.
Connection X5, terminals L1, N,
1, and 2
If AC voltage is present, stop the Sunny Island.
Connection X5, terminals 3 and
4
If DC voltage is present, correctly wire contactor or auxiliary contact Q2.
Check point Task
Contactors Q3 and Q4 Ensure that the wiring is correct.
Connection X2, terminals N and
PE
Ensure that no voltage is present between the terminals and that conductivity
can be measured.