Connection of AC cabling
Warning
Always ensure that the Multi RS is switched off and the AC input is isolated before removing the wiring compartment cover.
Warning
This is a safety class 1 product (supplied with a ground terminal for safety purposes). Its AC input and/or output terminals and/or chassis ground point on the inside of the Multi RS must be connected to an uninterruptible grounding point for safety purposes..
In a fixed installation, an uninterruptible grounding can be secured by means of the grounding wire of the AC input. Otherwise the casing must be grounded.
This product is provided with a ground relay that automatically connects the Neutral output to the chassis if no external AC supply is available. If an external AC supply is provided, the ground relay H will open before the input safety relay closes. This ensures the correct operation of an earth leakage circuit breaker that is connected to the output.
In a mobile installation (for example, with a shore current plug), unplugging the shore connection will simultaneously disconnect the grounding connection. In that case, the casing must be connected to the vehicle chassis.
Note
In accordance with IEC62109-1 and IEC62109-2, an internal Residual Current Monitoring Unit (RCMU) ensures that no DC current appears on the AC side. Both DC and AC fault current component types are monitored. If a fault is detected, the inverter will be automatically shut down, disconnecting the AC system.
Ensure that your AC installation meets local regulations for residual current protection. Please refer to the RCD Information on Multi RS document for further guidance.
Note
Full galvanic isolation is provided between AC and battery DC.
The AC connection terminal blocks can be found on the right hand side of the wiring compartment.
The AC connector blocks are the screw clamp type.
Warning
Conductor insulation should be stripped to expose 10 mm of bare conductor.
Maximum tightening torque is 1.2 Nm.
Warning
DO NOT reverse the polarity of the neutral and line conductors when connecting AC cabling.
AC-out-1 The AC output cable can be connected directly to the terminal block 'AC-out'. From left to right: "N" (neutral) - "PE" (earth) - "L" (phase). With its PowerAssist feature the Multi RS can add up to 6kVA (that is 6000 / 230 = 26A) to the output during periods of peak power requirement. The Multi RS can provide throughput of up to 50 A to the loads. The AC input relays are limited to 50 A, and the inverter can contribute up to 25 A continuous at best conditions (when it gets hotter this figure will be reduced).
Warning
The AC output terminals must be protected from overload by a circuit breaker rated at 50 A or less, and cable cross-section must be sized accordingly.
AC-out-2 A second output is available that disconnects its load in the event of battery-only operation. On these terminals, equipment is connected that may only operate if AC voltage is available on AC-in-1, e.g. an electric boiler or an air conditioner. The load on AC-out-2 is disconnected immediately when the inverter/charger switches to battery operation. After AC power becomes available on AC-in-1, the load on AC-out-2 will also be reconnected immediately.
AC-in The AC input cable can be connected to the terminal block 'AC–in'. From left to right: "N" (neutral) - "PE" (earth) - "L" (line). The AC input must be protected from overload by a magnetic circuit breaker rated at 50 A or less, and cable cross-section must be sized accordingly. If the input AC supply is rated at a lower value, the magnetic circuit breaker should be down sized accordingly.