CABLE CABINET E-MOBILITY AHMA LKM40424X

Charging stations are wall-mounted electrical units designed to meet the requirements and specifications of charging station standards. Temperature management is particularly critical in electric vehicle charging, so UTU charging stations always feature component-specific ventilation gaps and field-specific ventilation. The enclosure rating is IP31 due to the ventilated structure, which can be upgraded to IP34 by installing a protective cabinet (suitable protective cabinet LKS1490 no. 3436871). For electricity network measurement, the measurement models (LKM and LJKM) include an M2 meter position and 0.2S class current transformers, along with the Hager SPA930 combined overvoltage protector with alarm contacts. The unit can be connected to a 63A network connection, which is more cost-effective than a power connection. Later, as power demand increases, the connection can be upgraded to 125A. This is achieved via a DIP switch inside the compact breaker (breakers can be sealed). Charging Station Ahma LKM40424X Features

• Rated current 400A (available in 250A / 315A / 400A)
• 24 outputs with MCN340E (Hager circuit breaker C-curve 40A, 3-pole)
• Input with compact breaker HNJ400DR with mounting rail (Hager H3+)
• Network analyzer with ModBus communication (Circutor CVM-C11)
• Input connectors HYW007H (Al/Cu 2x35-300mm˛)
• Charging output connectors for Al/Cu 2.5-35mm˛

Temperature Management

In electric vehicle charging, the output components of the station often operate near their rated current, making temperature management critical for the unit’s lifespan.

The station incorporates temperature management requirements suited to charging load:

• Field-specific ventilation
• Air gaps in charging outputs
• Thermal emergency shutdown function

Charging output balancing factor of 1 (as required by the charging station standard).

The station features DIN rail mounting for sensors, enabling readiness for dynamic temperature management. When connected to an eParking backend system, the charging station can dynamically control charging load based on the temperature of output components.

Lifecycle Management

The unit includes reserved space for load management devices. The load management space is a general device compartment suitable for installing any device. Reserved space is provided for the eTolppa system’s load management device (eG) for multi-level load management. When the eTolppa load management device is installed in the station, no separate connection device is required at charging points.

If the thermal emergency shutdown function repeatedly interrupts power supply during the station’s lifecycle, it is advisable to implement dynamic temperature management. In this mode, the backend system can continuously limit charging station loads based on the temperature of output components.

The station includes reserved space for a harmonic filter. The network analyzer can monitor the development of harmonic distortions, and a harmonic filter can be easily added later. Alarms related to harmonics can be added to the analyzer.

The station also includes a separate compartment for spare outputs. The spare output compartment comes standard with 3x C10 and 2x C16 (1-pole) circuit breakers (for other electrical needs). Spare outputs are not wired to busbars.

This product description is an automated translation of the original Finnish description.