SMA STP 15000TL - Manual (Page 30)

Use of Y adapters for parallel connection of strings
The Y adapters must not be used to interrupt the DC circuit.
• Do not use the Y adapters in the immediate vicinity of the inverter. The adapters must not
be visible or freely accessible.
• In order to interrupt the DC circuit, always disconnect the inverter as described in this
document (see Section 10, page 48).
6.4.2 Connecting the PV Array
Risk of fire due to electric arc when thresholds on the DC input are exceeded
The electronic string fuse recognizes when the maximum short-circuit current is exceeded and
short-circuits the PV array. This can cause an electric arc and thus a risk of fire.
• Ensure that the thresholds for the input voltage, the input current and the short-circuit current
of the inverter are adhered to.
Damage to the DC connectors due the use of contact cleaner of other cleaning agents
Some contact cleaners or other cleaning agents may contain substances that decompose the
plastic of the DC connectors.
• Do not use contact cleaners or other cleaning agents for cleaning the DC connectors.
Limitation of the electronic string fuse by using string connection boxes
When using string connection boxes, the functionality of the electronic string fuse may be
limited.
Procedure:
1. Ensure that the circuit breaker is switched off from all three line conductors and that it cannot
be reconnected.
2. Ensure that there is no ground fault in the PV array (see service manual at www.SMA-
Solar.com).
3. Securely plug in the ESS. The ESS must be aligned parallel to and flush with the enclosure. If
the ESS is plugged in when connecting the DC connectors, the protective function of the
electronic string fuse can be activated.
6 Electrical Connection SMA Solar Technology AG
Operating Manual STP15-17TL-10-BE-en-10 30