Table of Contents
Advertisement
6.2. Scaling factor
This parameter only applies to pre-VE.Bus systems. Leave it at its default value of 1 for VE.Bus systems.
For legacy pre-VE.Bus systems, refer to the
6.3. Generator current limit
This parameter only applies when an external transfer switch is used and has no impact otherwise.
The generator AC current limit can be adjusted within the range of 0 to 198A, with increments of 2A.
When configuring the generator AC current limit, be aware that not all generators can operate at full load. Particularly, smaller
3000 rpm generators from certain brands can overheat during extended full-load operation, and the maximum current should be
less than the rated maximum, while the AC current limit for 1500 rpm generators can be set higher.
• For 3000 rpm generators, set to 70% of their rated maximum.
• For 1500 rpm generators, set to 90% of their rated maximum.
6.4. Upper AC input limit 1 to 4
To prevent overly high AC input current limits, the control panel provides an upper AC input limit adjustment. For instance, when
dealing with large or multiple inverter/chargers working in parallel, the maximum feed-through current might exceed the AC supply
or circuit breaker capacity. Modifying the upper AC input current limit ensures the shore current limit remains within a specific
range.
An extended VE.Bus system can have up to four AC inputs. Yet, a basic VE.Bus MultiPlus system has one AC input. As such,
only the upper limit for AC input 1 needs to be configured. The other AC input limits can be safely ignored.
6.4.1. Special display feature
Consider this scenario:
You have an inverter/charger system with two AC inputs, namely generator and shore power. You want to prioritise the generator
over shore power. You connect the generator to AC input 1 and shore power to AC input 2. You do not want the user to alter
the generator AC input limit, so in the inverter/charger settings, you disable the "overruled by remote" setting for AC input 1, and
enable it for AC input 2.
The control panel will behave as follows:
• When the generator is active, the control panel displays "AC1".
• When the generator stopped and shore power is active, the panel alternates between displaying "AC2" and the current limit for
AC2. Yet, this alternating display might not match your preferences.
To resolve this:
A simpler approach is to show just the current limit value when AC input 2 is active. This is enough to indicate the switch to shore
power. To achieve this, set all but one of the upper AC input limit parameters to zero. In this example, the limits for AC1, AC3 and
AC4 should be set to zero. This adjustment eliminates the unwanted alternating behavior.
6.5. Current limit overruled by remote
This setting exists in the inverter/charger. When enabled, the control panel can modify the AC input current limit, and when
disabled, it can not.
In the case of a Quattro, both inputs have an "overruled by remote" setting and are independently configurable.
For details on configuring "overruled by remote," consult the inverter/charger manual.
6.6. Configuration example
Two examples are given to help you understand the setting of the parameters.
Two VE.Bus Multis 16A/230V + 4kVA gen. (3000 rpm) + external transfer switch.
Because this is a VE.Bus system, the scaling factor does not need to be set.
A 4kVA generator can supply a maximum current of 17.4A. Using a 70% safety margin, we will set the generator current to 12A.
To set the configuration, do the following:
Page 7
Digital Multi Control
Pre-VE.Bus scaling factor [11]
chapter.
Configuration
Advertisement
Table of Contents
