Nexus Zero / RELY — AC switching cabinets and modules for ESS
Country: China · Model: Nexus Zero / RELY
Nexus Zero cabinets and RELY modules switch AC power between the PV plant, the storage, the grid and the loads in commercial energy storage systems. They are installed where the site must switch to island mode automatically when the external grid fails and then return to it.
- Purpose
- grid/island switching in commercial ESS and microgrids
- Control
- built-in EMS 1000 PRO
- Mounting
- wall-mounted or floor-standing (RELY)
Technical specifications
| Purpose | grid/island switching in commercial ESS and microgrids |
|---|---|
| Control | built-in EMS 1000 PRO |
| Mounting | wall-mounted or floor-standing (RELY) |
| Customs codes (for reference) | |
| HS code | 8537.10 |
| UKTZED code (Ukraine) | 8537109890 |
| CN code (EU) | 85371098 |
Specifications are taken from the manufacturer’s technical documentation. Updated . Customs codes are for reference only; the final code is determined at customs declaration for the specific model.
Description
Inside is the power switchgear that distributes energy flows between sources and consumers and separates the island network of the site from the external grid. Switching is controlled by the built-in EMS 1000 PRO controller, so the logic of the transition to island mode does not need a separate programmable relay in the panel. In a microgrid this unit determines when the storage supplies the load on its own and when the system again works in parallel with the grid. The equipment is designed for wall mounting, and RELY can also be placed on a base. The cabinet is placed next to the main distribution board to shorten the power lines between the input, the inverter and the load. Rated currents and the set of switching devices are clarified with the manufacturer for a specific project.
How to choose
The choice between a cabinet and a module depends on the installation space and the layout of the site. For a room with a free load-bearing wall the wall-mounted variant is more convenient, and in an electrical room with floor-standing equipment the RELY on a base is more suitable. The switching unit is selected together with the storage and the hybrid inverter, because exactly their flows pass through it, and the input current of the cabinet must match the power of this pair.
Request a price and lead time
Nexus Zero / RELY — AC switching cabinets and modules for ESS. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What is the Nexus Zero cabinet used for in a commercial storage system?
It switches the site between the grid and autonomous supply from the storage and distributes energy between the PV plant, the battery and the loads.
Which controller manages switching in the Nexus Zero and RELY cabinets?
The built-in EMS 1000 PRO. It decides on the transition to island mode and back, and no separate logic in the panel is needed.
How are the RELY modules mounted?
RELY is designed for installation on a base, that is, on the floor of the electrical room. Wall mounting is also available for the equipment of the series.
Is Nexus Zero suitable for a microgrid with several energy sources?
Yes, the cabinets are intended precisely for routing energy between the PV plant, the storage, the grid and the consumers in commercial ESS and microgrids.
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