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SMA Solar Technology AG
5.8.3 Connect Shunt Release
Depending on the order, the Sunny String-Monitor includes a DC circuit breaker with a remote trigger.
In this case the DC circuit breaker is equipped with a shunt release and a feedback contact.
By means of the shunt release it is possible to disconnect the PV array from the inverter through the
DC switch.
Destruction of the operating current release due to faulty cable dimensioning.
A cable cross section which is too small can lead to strong overheating of the operating current
release. Strong overheating can destroy the operating current release.
• Observe the indications regarding cable dimensioning (see chapter 5.8.1 "Dimensioning the
Connection Cable for the Operating Current Release", page 32).
Cable protection
• Furnish the connection cable of the remote trigger with a suitable cable protector.
1. Remove the filler-plugs from the cable gland.
2. Guide the connection cable through the cable gland into the enclosure interior.
3. Strip the connection cable 14 mm.
4. Connect the connection cable to the terminal strip.
5. Tighten the cable gland.
5.8.4 Connecting the Feedback Contact
Depending on the order, the Sunny String-Monitor includes a DC circuit breaker with a remote trigger.
In this case the DC circuit breaker is equipped with a shunt release and a feedback contact.
The switch status can be displayed via the feedback contact, for example by the connection of an
indicator lamp. The feedback contact is a toggle switch and can be used as an NC or as an NO
contact.
1. Remove the filler-plugs from the cable gland.
2. Guide the connection cable through the cable gland into the enclosure interior.
3. Strip the connection cable 11 mm.
4. Connect the connection cable to the terminal strip.
5. Tighten the cable gland.
Technical Description
5 Electrical Connection
SSM-TEN103132
35
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