Limit management

Intro

The Charge Controller offers a feature for managing the current or power output. Regulating the output helps:

• Protect electrical components
• Prevent overload situations concerning the main fuses in the installation
• Ensures that the charger is operated within local grid codes
• Helps to operate the chargers within contractual peak load boundaries or cost saving measures

Relevant configuration parameters

Fixed current limiting

Hardware Current Limit

Role	Scope	Location in Dashboard
Manufacturer	Single and dual connector charger

Defines the current-carrying capacity of a connector including the components that lead to the connector.

Explanation

• Defined by the maximum current-carrying capacity of the outlet or fixed charging cable, of built-in or required protection devices, energy meters, contactor or relays.
• Can be set in steps of 1 Ampere from 6A to 80A.
• Typical values are
  • 16A
  • 20A
  • 32A
  • 63A

Installation Current Limit

Role	Scope	Location in Dashboard
Installer	Single and dual connector charger with a dedicated feed per connector

Defines the current carrying capacity of the upstream installation that supplies the connector.

Explanation

• Is equal to or below the Hardware Current Limit.
• Defined by current-carrying capacity of the installation cables, protection elements or meters outside the charger.
• Can be set in steps of 1 Ampere from 6A to 80A.
• Setting requires local access to the charger.

Operator Current Limit

Role	Scope	Location in Dashboard
Operator	Single and dual connector charger	(Master) http://192.168.123.123/legacy/manufacturer/settings
		(Slave) http://192.168.123.124/legacy/manufacturer/settings

Defines the maximum charging current for the connector.

Explanation

• Is equal to or below the Installation Current Limit.
• Operators may set a limit for contractual reasons.
• Can be set in steps of 1 Ampere from 6A to 80A also during charging sessions.

Dynamic limiting

Charging Station Current Limit

Role	Scope	Location in Dashboard
Manufacturer (enable/disable), Installer (configuration)	Dual connector charger with single feeding cable

This function dynamically balances the available current on dual connector chargers with a single feeding cable between the connectors.

Explanation

• The Manufacturer of a charging stations may enable the function with the parameter Charging Station with single feed in the Master/Slave settings of both charge controllers.
• When enabled, the Manufacturer may set the Charging Station Hardware Current Limit on the Master controller in increments of 1 Ampere in the range of 0 to 160 A (default value: 64 A).
• In case the station can be used with either one or two feeding cables, the Manufacturer should enable the option Setting 'Charging Station with single feed' is available to Installer on the Master controller. This allows the installer to set the chosen installation option.
• When the function is enabled, installers may define a Charging Station Installation Current Limit in increments of 1 Ampere in the range of 0 to 160 A (default value: 64 A). This limit replaces the connector-specific Installation Current Limit.
• The function may be combined with the Dynamic Load Balancing.

Power Limit

Role	Scope	Location in Dashboard
Installer	Single and dual connector charger

This function limits the power supplied per connector.

Explanation

• The Installer can enable the function in the Load Management section with Power Limiter Mode.
• The function considers the hot phases and calculates the current accordingly to not exceed the set maximum.
• In manual configuration, the power limit can be chosen in 1 W increments between 4.140 and 43.000 Watt.
• The progressive mode assumes a single-phase car and reduces the current after one minute when more phases are used. The conservative mode assumes a three-phase car and increased the current when less phases are used.
• The option Slow charging (Austria) limits the maximum power to 5.5 kW per connector, using the progressive mode.
• On dual connector chargers, the limit will be applied to both connectors individually.