Victron energy MultiPlus-II 48/3000/35-50 120V Manual página 13

4.3 Connection of the AC cabling
The MultiPlus-II is a safety class I product (supplied with a ground terminal for safety purposes). Its AC input and/or
output terminals and/or grounding point on the outside of the product must be provided with an
uninterruptible grounding point for safety purposes.
The MultiPlus-II is provided with a ground relay (relay H, see appendix B) 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 fixed installation, an uninterruptable grounding can be secured by means of the grounding wire of the AC
input. Otherwise the casing must be grounded.
─ In a mobile installation (for example, with a shore current plug), interrupting the shore connection will
simultaneously disconnect the grounding connection. In that case, the casing must be connected to the chassis
(of the vehicle) or to the hull or grounding plate (of the boat).
In case of a boat, direct connection to the shore ground is not recommended because of potential galvanic corrosion.
The solution to this is using an isolation transformer.
This unit or system is provided with fixed trip limits and shall not be aggregated above 30 kw on a single point of
common connection.
The terminal blocks can be found on the printed circuit board, see Appendix A.
Do not invert neutral and phase when connecting the AC.
The shore or mains cable must be connected to the Multi with the aid of a three-wire 90ºC (194ºF) copper cable. Minimum torque
1.6Nm.
Rated current
Recommend fuse or circuit breaker
Minimum wire gauge
The inverter does incorporate a mains frequency isolating transformer. This precludes the possibility of DC current at any AC port.
Therefore type A RCD's can be used.
AC-in
•
The AC input cable can be connected to the terminal block "AC–in".
From left to right: "N" (neutral), "PE" (earth) and "L" (phase)
The AC input must be protected by a fuse or 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 fuse or magnetic circuit breaker should be down sized
accordingly.
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) and "L" (phase)
With its PowerAssist feature the Multi can add up to 3 kVA (that is 3000 / 120 = 25 A) to the output during periods of peak power
requirement. Together with a maximum input current of 32 A this means that the output can supply up to 50 + 25 = 75 A
An earth leakage circuit breaker and a fuse or circuit breaker rated to support the expected load must be included in
series with the output, and cable cross-section must be sized accordingly. Victron Energy recommends to use the Blue Sea
systems GFCI circuit breakersPN. 309X or 310X. The maximum rating of the fuse or circuit breaker is 75 A.
AC-out-2
•
A second output is available that disconnects its load in the event of battery 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 MultiPlus-II switches to battery operation. After AC power becomes available on AC-in-1, the
load on AC-out-2 will be reconnected with a delay of approximately 2 minutes. This to allow a genset to stabilise.
4.4 Optional Connections
A number of optional connections are possible:
4.4.1 Remote Control
The product can be remotely controlled in two ways.
• With an external switch (connection terminal M, see appendix A). Operates only if the switch on the MultiPlus-II is set to "on".
With a Multi Control panel (connected to one of the two RJ45 sockets L, see appendix A). Operates only if the switch on the
•
MultiPlus-II is set to "on".
4.4.2. Programmable relay
The product is equipped with a programmable relay.
The relay can be programmed for all kinds of other applications however, for example as a starter relay for a generator.
4.4.3 Programmable analog/digital input/output ports
The product is equipped with 2 analog/digital input/output ports.
These ports can be used for several purposes. One application is communication with the BMS of a lithium-ion battery.
AC-in AC-Out-1
50 A 75 A
50 A 75 A
AWG 6 AWG 6
AC-OUT-2
32 A
32 A
AWG 10
11