SMA MEDIUM VOLTAGE POWER STATION 500SC-JP - Connecting Cables for Analog Setpoints; Connecting the Cable for the External Fast Stop

4. Attach the network cables to the cable support rail using a cable tie. This will prevent the network cables from
being pulled out inadvertently.
5. Mount the panels (see Section12.3.1.2, page164).
5.7.2.4 Connecting Cables for Analog Setpoints
If the setpoints for active power limitation and reactive power control are not transmitted via the network, there are
terminals in the inverter for connecting external setpoints. The inverter processes standard analog signals from 4.0mA
to 20.0mA.
Cable requirement:
☐ The cable used must be shielded.
Procedure:
1. Disassemble the panels (see Section12.3.1.2, page164).
2. Insert the cables (see Section12.4.3, page171).
3. Connect the cables in accordance with the circuit diagram (see Section12.6, page175).
4. Secure the cables on the cable support rail. This will prevent the cables from being pulled out inadvertently.
5. Mount the panels (see Section12.3.1.2, page164).
5.7.2.5 Connecting the Cable for the External Fast Stop
If required, you can connect an external fast stop in accordance with the circuit diagram. The fast stop can be
operated by means of an internal or external supply voltage.
Fast stop input already assigned for order option "AC contactor"
If the MVPowerStation is delivered with order option "AC contactor", the fast stop input for the voltage and
frequency monitoring relay is already assigned. Thus, connecting an external switch is not possible.
Shortfall of external supply voltage
If there is an external supply voltage between 18.5V to 24.0V, the inverter will continue to operate in its current
operating state. If the external supply voltage falls below 18.5V, the inverter switches from the current operating
state to the operating state "Stop". If the temperature inside the inverter exceeds the temperature limit, a supply
voltage of 20.0V to 24.0V must be present to continue operating the inverter in its current operating state.
Temperature limit: +60°C
• Ensure that the external supply voltage is between 20.0V and 24.0V.
Cable requirement:
☐ The cable used must be shielded.
Additional cable requirements for internal supply voltage:
☐ Maximum cable length with cable cross-section: 130m/2.5mm²
☐ Maximum cable length with cable cross-section: 80m/1.5mm²
Requirements:
☐ A switch must be used that can interrupt the supply voltage.
Procedure:
1. Disassemble the panels (see Section12.3.1.2, page164).
2. Insert the cables (see Section12.4.3, page171).
3. Connect the cables in accordance with the circuit diagram (see Section12.6, page175).
5 Installation
SMA Solar Technology AG
System Manual 69MVPS22JP-SH-en-11