Micrologic X Control Unit Power Supply
The Micrologic X control unit is powered by the current through the internal current transformers (CT).
The standard protection functions of Micrologic X control units operate with the internal current supply.
Internal Power Supplies
If the load current is higher than 20% of the rated current In, the internal current supply provides the power supply for the full functioning of the Micrologic X control unit. This includes:
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The Micrologic X HMI, display screen, and LEDs.
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The metering functions with accuracies in accordance with IEC 61557-12.
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The maintenance and diagnostic functions.
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Communication through ULP modules.
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Communication through Bluetooth low energy technology.
External Power Supplies
To provide a power supply to the Micrologic X control unit when the load is below 20% of the rated current In, and maintain the full functioning of the Micrologic X control unit, optional power supplies can be used. Optional power supplies include the following:
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Permanent power supplies:
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Internal voltage power supply (VPS) module, up to 600 Vac.
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External 24 Vdc power supply.
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Temporary power supplies connected to the mini USB port of the Micrologic X control unit:
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External Mobile Power Pack through USB connection.
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Android smartphone through USB OTG connection (smartphone must be compatible with USB OTG - see list of compatible smartphones available on the Schneider Electric website).
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PC through USB connection.
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Micrologic X control units are also equipped with an internal battery dedicated to the supply of the LED indicators and the internal clock. It allows the user to read and identify the trip cause when the circuit breaker trips. The battery is a lithium type with a service life of approximately ten years. The battery condition can be checked by pressing the test button on the front of the Micrologic X control unit
An external 24 Vdc power supply is required when IFE/EIFE/IFM communication modules, IO modules or an FDM128 display unit are installed.
The XF diag&com, MX diag&com, MN diag, XF, MX, and MN voltage release coils and the spring charging motor MCH require a power supply separate from the Micrologic X control unit power supply
Micrologic X Control Unit Voltage Measurement Inputs
The input voltage of the VPS module is limited to 600 Vac. The module is directly connected to the internal pickup voltage (PTI) on the downstream side of the circuit breaker. The VPS module can be supplied from an external voltage by means of the optional PTE voltage measurement inputs and voltage transformers (mandatory for voltages above 600 Vac).
The external voltage can be picked up either from the top or the bottom side of the circuit breaker.
When the power source and the PTE option are connected on the same side of the circuit breaker (for example, both the power source and the PTE are connected on the top side), the Micrologic X control unit is energized as soon as the power source is live, whatever the position of the circuit breaker (open or closed).
When the power source and the PTE option are connected on different sides of the circuit breaker (for example, the power source is connected on the top side and the PTE on the bottom side), the Micrologic X control unit is energized only when the circuit breaker is closed.
The possible VT ratio are the following:
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Primary range:
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Min value: 100 V
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Max value: 1250 V
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Secondary range:
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Min value: 100 V
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Max value: 690 V
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Recommended values: 220-400 V
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Power ≥ 10 VA
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Max voltage for VPS is 600 V (see Voltage Power Supply Module (VPS))
Recommended Alternative Power Sources
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Recommended Alternative Power Sources in Different Situations |
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Situation |
Purpose |
VPS |
External 24 Vdc Power Supply |
PC Supply |
Portable Battery |
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Circuit breaker is energized and current is < 20% of rated current. |
Maintains protection functions, measurement data, communication, diagnostic data, HMI, and wireless features. |
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— |
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Circuit breaker is opened or not energized. |
Retrieve information from control unit front screen/embedded HMI or with Bluetooth connection. |
— |
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During setting, commissioning, testing and maintenance. |
Complete any testing or evaluation of the breaker function or control devices. |
— |
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When IFE/EIFE, IO module or FDM128 is installed. |
These devices require a power supply. |
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— |
— |
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Micrologic X |
EIFE |
IFE |
IO Module |
FDM128 |
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|---|---|---|---|---|---|---|
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Without M2C |
With M2C |
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Power consumption (mA) 24 Vdc |
250 |
300 |
250 |
150 |
150 |
283 |