Nasta

Nasta AS is the Hitachi Construction Machinery importer in Norway. Hevtec and Nasta have worked closely together since 2017 and during this time we have designed multiple different electric excavator platforms for the Norwegian market.

Throughout the years, Hevtec has delivered Nasta a variety of electrification services including software development, electrical design for both high and logic voltage levels, driveline specification and component selection, CAD design, simulation and commissioning assistance. In addition, we have supplied high and low voltage wire harnesses, power distribution units (PDU) and CCS charging control solutions for the machines.

These state-of-the-art work machine electric drivetrains are controlled by the Hevtec Control System enabling full battery drive, grid-only drive, and combined battery and grid driving called “PeakShaver +” and which later on developed into “Battery+” technology.

Since 2020, when the COVID-19 pandemic was introduced globally, we started providing our customers remote commissioning services when possible. Today, most of the electric machines built by Nasta are commissioned remotely, as the technical personnel there have expanded their skillset to work with the high voltage drivetrain components with confidence. Remote commissioning is made possible with the Hevtec real-time software access connection.

More information about Nasta Zero Emissions machinery.

ZE160

Photograph Ellen Omland, Climate Agency | City of Oslo

The ZE160 electric excavator was our first project together with Nasta dating back to 2017. The machine has an operating weight of 17.5 tons and is the first electrified construction machine produced by Nasta. It uses the intelligent power management system called “PeakShaver+”, which enables hybrid operation with a 400Vac grid connection and on-board battery. The machine has a 44 kWh lithium-ion high voltage battery system and grid connection possibility up to 125A 400Vac, which enables 24/7 usage of the machine.

The machine is powered by an 86 kW electric motor. When connected to the grid, the machine uses the available grid power first and the battery is used to supply power during high load situations. The battery is automatically charged every time there is excess power available from the grid. The operation time of the machine in battery mode varies between 30 to 60 minutes, depending on the type of work performed.

Hevtec Control System features used in this project

  • Intelligent power and energy management
  • Multiple energy source management
  • Cabin, battery system and power electronics thermal management
  • Data logging and edge computing
  • Auxiliary system control
  • Charge control
  • Touch-screen GUI
  • IoT

ZE350

The Nasta Zeron ZE350 is an emission-free, grid electric powered excavator, based on the Hitachi ZX350 models. It has an operating weight of 38 tons and has a peak power of 210 kW.

The ZE350 was one of the first emission-free machines to be launched in Norway. The machine is connected to the grid through a dedicated power supply container. The power supply is constantly supervised by a residual-current-device (RCD) to ensure safe operation. Grid power is converted to a high voltage DC-link on the machine with an inverter and hence the machine operation is similar to any battery driven machine from there on out.

The supply container makes sure the machine power cord keeps tight and does not roll under the machine.

Hevtec provided the control system, electrical system specification design and engineering services, and commissioned services in this project.

Hevtec Control System features used in this project
  • Intelligent power and energy management
  • Cabin and power electronics thermal management
  • Data logging and edge computing
  • Auxiliary system control
  • Touch-screen GUI

ZE210

The Zeron ZE210 is an emission-free construction machine that is based on the Hitachi ZX210 model. The machine runs on both grid and battery supply and supports DC-fast charging.

The Zeron ZE210 is the latest innovation among emission-free excavators from Nasta, and it introduces the “Battery+” technology. The “Battery+” is the ideal machine for urban tasks where zero emissions are required, while capacity and ease of use are crucial. The 130 kW motor together with a 300 kWh battery pack provides the 24 ton machine an operating time of up to 6 hours. With an AC-grid supply, the crawler excavator can be driven 24/7 with zero local emissions. The excavator is fitted with a standard CCS2 inlet for DC-fast charging where available.

In addition to delivering the electric drivetrain control system, Hevtec provided a wide range of electrification services including driveline component specification, simulation, electrical engineering and commissioning.

Hevtec Control System features used in this project
  • Intelligent power and energy management
  • Multiple energy source management
  • Charge while driving
  • Cabin, battery system and power electronics thermal management
  • Data logging and edge computing
  • Auxiliary system control
  • Charge control, AC and CCS2
  • Touch-screen GUI

ZE135

The Nasta ZE135 is the smaller sibling of the ZE210 and is based on the Hitachi ZX135US model. The operating weight of the machine is 15,7 tons and it is powered by a 74 kW electric motor. The driveline is essentially a downscaled version of the ZE210 and includes the “Battery+” technology for combined grid and battery operation.

The machine is equipped with a 200 kWh battery, which provides up to 6 hours of operation time without charging in between. The excavator can be DC-fast charged through a standard CCS2 inlet where available. With an AC-grid supply, the crawler excavator can be driven 24/7 with zero local emissions.

For this project Hevtec provided driveline simulation and design, thermal management design, electrical engineering, the electric driveline control system, commissioning and mechanical CAD design work.

We also provided installation services by building one of the machines locally in our workshop in Finland.

Hevtec Control System features used in this project
  • Intelligent power and energy management
  • Multiple energy source management
  • Charge while driving
  • Cabin, battery system and power electronics thermal management
  • Data logging and edge computing
  • Auxiliary system control
  • Charge control, AC and CCS2
  • Touch-screen GUI
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