Dual Settings
Presentation
The dual settings function is compatible only with MasterPacT MTZ circuit breaker.
The dual settings function consists of two groups of protection settings - group A and group B.
You can switch from one group to another group under certain operating conditions. A typical application is to adjust short-circuit protection when the circuit breaker can be supplied by two sources with different short-circuit currents. For example, the circuit breaker is supplied by either the grid or a generator.
According to the type of MicroLogic X control unit, the dual settings function is supported by the following protections:
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Long-time overcurrent protection
-
Short-time overcurrent protection
-
Instantaneous overcurrent protection
-
Ground-fault protection
-
At any time, only one group can be active.
-
Dual settings is OFF as the factory setting of the device.
-
When dual settings is ON and controlled by the IO module, protections run group A or group B, as determined by the IO module input. Settings of group A are equal to dual setting OFF settings.
There are two modes to switch the dual settings from group A to group B and the opposite way. They differ in the fallback position if the connection failure occurs.
-
Two wire mode (fallback = stick to current group)
-
Single wire mode (fallback = enforce group A)
Using EcoStruxure Power Commission software, you can determine whether the dual settings can be controlled by using the IO module, and in which mode (single wire or two wire mode).
The device able to select the active group are:
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The IO module, through a digital input.
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The MicroLogic X control unit, by setting on the display screen.
-
A remote controller, by sending a setting command using the communication network.
The MasterPacT MTZ circuit breaker accepts group change commands from IO module only if it is configured so.
Compatible Devices
|
Range |
Minimum Hardware Configuration Required |
|---|---|
|
MasterPacT MTZ circuit breaker |
Fixed or drawout circuit breaker + MicroLogic X control unit + ULP port module |
Input/Output Assignments
The following tables list the possible assignment of the digital inputs and outputs, according to the predefined application selected on the IO module:
|
Inputs |
Predefined Application Selected |
||||||||
|---|---|---|---|---|---|---|---|---|---|
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
|
|
Dual settings A order (two wire mode) |
I5 |
– |
– |
I5 |
– |
– |
– |
– |
I5 |
|
Dual settings B order (two wire mode) |
I6 |
– |
– |
I6 |
– |
– |
– |
– |
I6 |
|
Dual settings switch order (single wire mode) |
I6 |
– |
I6 |
I6 |
– |
– |
– |
– |
I6 |
|
Outputs |
Predefined Application Selected |
||||||||
|---|---|---|---|---|---|---|---|---|---|
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
|
|
Dual settings B selected |
O1–O3 |
O3 |
O1, O2 |
O3 |
– |
– |
– |
– |
O1–O3 |
-
When dual settings switch order is selected, then the dual settings A order and dual settings B order is not allowed.
-
You must use I5 and I6 for two wire control and only I6 for single wire control.
-
Dual settings B selected output can be configured even if dual setting inputs are not configured in the IO module.
Dual Settings Selection
The active setting group is defined from the status of the digital inputs I5 and/or I6:
-
In two wire mode:
-
I5=1 and I6=0: setting group A active
-
I5=0 and I6=1: setting group B active
NOTE: When I5=I6=1 or I5=I6=0, a discrepancy alarm is generated and the setting group active before the detection of the discrepancy remains active. -
-
In single wire mode:
-
I6=0: setting group A active
-
I6=1: setting group B active
-
Application Events
The following event is generated by the application. For more information on IO module events, refer to Events and Alarms.
|
Code |
Description |
Type |
Priority |
Reset |
|---|---|---|---|---|
|
3333 (0x0D05) |
Dual settings 2-wire input discrepancy (MasterPacT MTZ only) |
Alarm |
High |
Auto |
Recommended action: Check wiring from the circuit breaker to the IO module and the inputs of the IO module.