Mora AES-2040 4Pole 40kA AC SPD

Mora AES-2040 4Pole 40kA AC SPD is a DIN-rail surge protection device for compatible three-phase AC distribution systems. When installed in a properly designed panel, it helps divert short-duration transient overvoltages away from sensitive electrical equipment and the AC side of suitable solar inverters.

Mora AES-2040 4Pole 40kA AC SPD Features

• Four-pole arrangement: intended for coordinated protection of three phase conductors and neutral in a compatible system.
• DIN-rail mounting: compact installation inside an appropriate distribution enclosure.
• Visual status indication: supports routine inspection of protection-module condition.
• 40kA stated maximum discharge rating: verify the exact Imax marking on the received unit.
• Replaceable modules: supports practical maintenance where the supplied version uses plug-in cartridges.

Understanding the Electrical Ratings

The “40kA” marking commonly refers to maximum surge discharge current (Imax), not continuous load current. Check the supplied SPD label for maximum continuous operating voltage (Uc), nominal discharge current (In), Imax, voltage protection level (Up), frequency and SPD type or test class. These values must match the real panel design.

The protection level should coordinate with the impulse withstand rating of the protected equipment. The designer should also consider nominal system voltage, prospective fault current, installation category, supply configuration and earthing arrangement. Do not select a three-phase SPD using pole count or the 40kA headline alone.

Typical Applications

• Three-phase commercial and industrial distribution boards
• Workshops, offices and multi-load electrical panels
• Compatible three-phase solar-inverter AC distribution
• Generator and utility-connected three-phase systems

Installation and Earthing Requirements

Installation must be completed by a qualified electrician. Follow the wiring diagram and L1, L2, L3 and neutral markings on the actual device. Use the specified conductor size and terminal torque, and keep connections as short and direct as practical. Long or looped leads raise the effective protection voltage during a surge.

A low-impedance earthing and bonding path is essential. The SPD cannot compensate for missing earthing, poor bonding or unsuitable cable routing. The installer should provide correctly coordinated upstream backup protection where required and confirm that the neutral arrangement matches the supply system.

An SPD does not replace a circuit breaker, RCCB, voltage protector, earthing system or external lightning-protection design. Browse suitable distribution boxes and more surge protection devices for a coordinated installation.

Inspection and Replacement

Inspect every module’s status window during scheduled panel maintenance and after a known surge or lightning event. If an indicator shows failure, isolate the panel safely and replace the affected module or complete device according to the manufacturer’s instructions. SPDs can degrade after repeated transient events even while the electrical system continues operating.

Selection Checklist

Before ordering, record the line-to-line and line-to-neutral voltages, earthing arrangement, required SPD type, equipment impulse rating, enclosure space and backup-protection requirements. Confirm Uc, Up, In, Imax and the four-pole wiring configuration printed on the supplied unit. Buildings with external lightning protection or exposed incoming services may need additional coordinated SPD stages.

Why Buy from HN Electric?

HN Electric supplies electrical protection products across Pakistan with convenient online ordering. Explore additional Mora electrical products, or share your panel and supply details with our team before ordering if you need help checking compatibility.

Important: Product appearance and label details may vary by batch. Verify the received device and arrange professional installation before energizing the three-phase circuit.

Compatibility note: Confirm whether the installation requires Type 1, Type 2 or coordinated multi-stage surge protection. The correct choice depends on lightning exposure, building wiring and upstream protection. A qualified designer should review high-risk sites, industrial panels and buildings fitted with an external lightning protection system.

Mora AES-2040 4Pole 40kA AC SPD FAQs

What does the 40kA marking mean?

On the Mora AES-2040 4Pole 40kA AC SPD, 40kA normally refers to the stated maximum surge-discharge current, not the continuous load current. Confirm Imax, In, Uc and Up on the supplied unit.

Does this SPD protect against sustained over-voltage?

An SPD is designed for short transient events. Sustained high or low voltage requires suitable voltage-protection equipment, while overload and short-circuit faults require correctly rated breakers or fuses.

Why are short connections and good earthing important?

Long, looped or high-impedance conductors increase the effective voltage reaching protected equipment during a surge. Correct bonding, earthing and conductor routing are essential to SPD performance.

Can this SPD be installed without backup protection?

Backup protection requirements depend on the SPD markings, prospective fault current and manufacturer instructions. A qualified electrician should design and install the coordinated system; general standards information is available from the International Electrotechnical Commission.