Dual Settings

Presentation

The dual settings function consists of two sets of parameters for the following protection functions, according to the type of MicroLogic X control unit:

Long-time overcurrent protection
Short-time overcurrent protection
Instantaneous overcurrent protection
Ground-fault protection

You can switch from one set to the other under certain operating conditions.

A typical application is to adjust short-circuit protection when the circuit breaker can be supplied by two sources with very different short-circuit currents. For example, the circuit breaker is supplied by either the grid or a generator.

Availability

The dual settings function is available on:

MicroLogic 2.0 X, 5.0 X, 6.0 X, and 7.0 X control units for IEC standard
MicroLogic 3.0 X, 5.0 X and 6.0 X control units for UL standard

Operating Principle

By default, the dual settings function is disabled.

The dual settings function is enabled and disabled in one of the following ways:

With EcoStruxure Power Commission software
On the MicroLogic X display screen at Home > Protection > Dual settings > Dual settings

When the dual settings function is enabled, use EcoStruxure Power Commission software to configure the switch mode used to switch between setting group A and setting group B. The following switch modes are available:

Local HMI: MicroLogic X display screen
Remote: communication network
IO module - 1 wire: only available if a selector switch is wired on a digital input of an IO module
IO module - 2 wires: only available if a selector switch is wired on digital inputs of an IO module

The configured switch mode is displayed on the MicroLogic X display screen at Home > Protection > Dual settings > Switch mode.

When the dual settings function is enabled, two sets of protection parameters are available:

Set A corresponds to the settings currently selected.
Set B is a second set of protection parameters, which can be set as described in Setting the Protection.

Switching between Set A and Set B depends on the switch mode defined in EcoStruxure Power Commission software. Switch between sets as follows:

IO module -1 wire or 2 wires: by using the selector switch wired on digital inputs of the IO module
Local: On the MicroLogic X display screen at Home > Maintenance > Switch to other set > Switch to set B.
Remote: by sending a setting command using the communication network (password-protected)

Without an external command, Ir, tr, Isd, tsd, Ii, Ig, and tg settings are those of Set A.

When the Activate Set B external command is sent, the Ir, tr, Isd, tsd, Ii, Ig, and tg settings switch to those of Set B.

When the dual settings function is enabled, the settings on the display screen are marked _A or _B.

Setting the Protection Parameters

The Set A protection parameters are set as follows:

On the MicroLogic X display screen, at Home > Protection
With EcoStruxure Power Commission software
By sending a setting command using the communication network (password-protected).

The Set B protection parameters are set as follows:

On the MicroLogic X display screen, at Home > Protection > Dual settings > Settings
With EcoStruxure Power Commission software
By sending a setting command using the communication network (password-protected).

Function Settings

Function	Settings	Factory settings	Setting range	MicroLogic X type
Dual settings	Enable	NO	YES/NO	MicroLogic 2.0 X, 3.0 X, 5.0 X, 6.0 X, 7.0 X
Dual settings	Switch mode	Local HMI	Local HMI Remote IO - 1 Wire IO - 2 Wires	MicroLogic 2.0 X, 3.0 X, 5.0 X, 6.0 X, 7.0 X
Long-time Set B	Ir	1 x In	Same as set A	MicroLogic 2.0 X, 3.0 X, 5.0 X, 6.0 X, 7.0 X
Long-time Set B	tr	0.5 s	Same as set A	MicroLogic 2.0 X, 3.0 X, 5.0 X, 6.0 X, 7.0 X
Short-time Set B	Isd	1.5 x Ir	Same as set A	MicroLogic 5.0 X, 6.0 X, 7.0 X
Short-time Set B	tsd	0	Same as set A	MicroLogic 5.0 X, 6.0 X, 7.0 X
Instantaneous Set B	Isd	1.5 x Ir	Same as set A	MicroLogic 2.0 X
Instantaneous Set B	Ii	1.5 x In	Same as set A	MicroLogic 3.0 X
Instantaneous Set B	Ii mode	ON	Same as set A	MicroLogic 5.0 X, 6.0 X, 7.0 X
	Ii tripping mode	Standard	Same as set A
	Ii	2.0 x In	Same as set A
Ground-fault Set B	Ig mode	ON	Same as set A	MicroLogic 6.0 X IEC standard
	Ig	0.2 x In⁽¹⁾	Same as set A
	tg	0	Same as set A
Ground-fault Set B	Ig for In ≤ 1200 A	0.2 x In⁽¹⁾	Same as set A	MicroLogic 6.0 X UL standard
	Ig for In > 1200 A	500 A	Same as set A
	tg	0	Same as set A
(1) For In ≤ 400 A, the Ig factory setting is 0.3 x In.

Predefined Events

The function generates the following predefined events:

Code	Event	History	Severity
0x1300 (4864)	B curve active	Protection	Low
0x0D06 (3334)	Config error IO/CU: dual settings or inhibit cls.	Configuration	Medium

Recommended Actions

Code	Event	Recommended actions
0x0D06 (3334)	Config error IO/CU: dual settings or inhibit cls.	Correct the configuration error with EcoStruxure Power Commission software: Dual settings configuration error: Set Switch mode to IO-1 Wire or IO-2 Wire. Set IO module with dual setting assignment. Inhibit close order configuration error: Set Allow control by digital input under breaker close as enabled. Set IO module with Enable/Inhibit close order assignment.

Code

Event

Recommended actions

0x0D06 (3334)

Config error IO/CU: dual settings or inhibit cls.

Correct the configuration error with EcoStruxure Power Commission software:

Dual settings configuration error:
- Set Switch mode to IO-1 Wire or IO-2 Wire.
- Set IO module with dual setting assignment.
Inhibit close order configuration error:
- Set Allow control by digital input under breaker close as enabled.
- Set IO module with Enable/Inhibit close order assignment.