The dual settings function consists of two sets of parameters for the following protection functions, according to the type of MicroLogic X control unit:
oLong-time overcurrent protection
oShort-time overcurrent protection
oInstantaneous overcurrent protection
oGround-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.
The dual settings function is available on:
oMicroLogic 2.0 X, 5.0 X, 6.0 X, and 7.0 X control units for IEC standard
oMicroLogic 3.0 X, 5.0 X and 6.0 X control units for UL standard
By default, the dual settings function is disabled.
The dual settings function is enabled and disabled in one of the following ways:
oWith EcoStruxure Power Commission software
oOn 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:
oLocal HMI: MicroLogic X display screen
oRemote: communication network
oIO module - 1 wire: only available if a selector switch is wired on a digital input of an IO module
oIO 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:
oSet A corresponds to the settings currently selected.
oSet 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:
oIO module -1 wire or 2 wires: by using the selector switch wired on digital inputs of the IO module
oLocal: On the MicroLogic X display screen at Home > Maintenance > Switch to other set > Switch to set B.
oRemote: 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:
oOn the MicroLogic X display screen, at Home > Protection
oWith EcoStruxure Power Commission software
oBy sending a setting command using the communication network (password-protected).
The Set B protection parameters are set as follows:
oOn the MicroLogic X display screen, at Home > Protection > Dual settings > Settings
oWith EcoStruxure Power Commission software
oBy sending a setting command using the communication network (password-protected).
|
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 |
|
Switch mode |
Local HMI |
oLocal HMI oRemote oIO - 1 Wire oIO - 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 |
|
tr |
0.5 s |
Same as set A |
||
|
Short-time Set B |
Isd |
1.5 x Ir |
Same as set A |
MicroLogic 5.0 X, 6.0 X, 7.0 X |
|
tsd |
0 |
Same as set A |
||
|
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. |
||||
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 |
|
Code |
Event |
Recommended actions |
|---|---|---|
|
0x0D06 (3334) |
Config error IO/CU: dual settings or inhibit cls. |
Correct the configuration error with EcoStruxure Power Commission software: oDual settings configuration error: oSet Switch mode to IO-1 Wire or IO-2 Wire. oSet IO module with dual setting assignment. oInhibit close order configuration error: oSet Allow control by digital input under breaker close as enabled. oSet IO module with Enable/Inhibit close order assignment. |
