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Technical guide

Agri Microgrid Protection: NEUTRON Scope at Themar Al Emarat Solar Farm

A DC-plus-AC protection scope for an agriculture microgrid with solar, storage and inverter-connected loads.

NEUTRON Engineering TeamUpdated September 9, 20266 min readTechnical application guidance
Hydroponic greenhouse and nearby solar microgrid equipment
Fig. 0 — The microgrid serves farm loads such as pumps, lighting and climate control.

Key takeaways

  • Protection must work on both DC and AC sides and remain practical for on-site staff.
  • Treat headline ratings as an engineering input, then confirm the final configuration against the project drawings and applicable local requirements.
  • Keep the approved component list, critical interfaces and required test or document deliverables visible before production begins.

1. Solar for agriculture

Themar Al Emarat is a hydroponic farm powered by a solar microgrid, an example of agriculture moving off the public grid with on-site PV and storage. A farm microgrid pairs a PV array with storage and an inverter feeding local loads such as pumps, lighting and climate control. Protection must work on both the DC and AC sides and be simple enough for on-site staff.

2. DC side protection

  • A DC isolation switch at the array combiner for safe maintenance.
  • gPV fuses protecting each string against short circuit and reverse current.
  • A DC-rated SPD where lightning exposure is significant.
DC combiner with isolator and gPV fuses for a farm PV array
Fig. 1 — The array-side DC protection chain remains separately isolatable and serviceable.

3. AC side: Type B RCBO

On the AC distribution board NEUTRON installed Type B RCBO units. Because the inverter can present smooth DC, a Type B device senses AC, pulsating DC and smooth DC, closing the shock-protection gap left by a Type A device.

AC distribution board with residual-current and circuit protection modules
Fig. 2 — Type B residual-current protection is selected for an inverter-connected AC board.

4. Nuisance trip avoidance

  • Correct Type B threshold sizing.
  • Clean array earthing to avoid parasitic leakage.
  • No mixed neutral-earth loops in the AC board.

5. Outcome

The DC-plus-AC protection approach removed shock-risk gaps and cut nuisance trips, keeping the farm loads stable through humid and dusty seasons.

Project paths

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Engineering boundary

Final ratings, coordination, installation and applicable local requirements must be verified against current standards, manufacturer documentation and the approved project design.

Frequently asked questions

Why Type B RCD for an agri microgrid?

The inverter can inject smooth DC that a Type A RCD cannot detect; Type B senses AC, pulsating DC and smooth DC.

What causes microgrid RCBO nuisance trips?

Humid mornings, array parasitic capacitance and mixed neutral-earth loops; correct sizing and clean earthing resolve most.

What can a farm microgrid serve?

Depending on array and storage size, it can power pumps, lighting, refrigeration and climate control for a greenhouse or hydroponic farm.

Which NEUTRON products fit?

DC isolator plus gPV fuse combiners, Type B RCBO or RCCB, coordinated DC SPD and a compact low-voltage distribution assembly.

Review the array and farm-load interfaces.

Share the PV, inverter, storage and priority-load inputs for a coordinated protection review.

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NEUTRON Engineering TeamPower distribution and new-energy equipment for project-based export supply.

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Technical review note

Published from the approved Period 12 source package; project, technical and standards statements are retained from the supplied publication content.