AC 4 Pole 385V 20KA-40KA, 40KA-60KA, 60KA-80KA Surge Protection Device YCS6

AC 4P SPD is the correct board-level surge protection format when the installation is 3-phase and the cost of downtime is higher than the cost of protection. The CNC YCS6-C 4-pole surge protection device is meant for 3-phase panels, industrial boards, lifts, commercial buildings, solar ACDBs and generator-related distribution where transient overvoltage can damage drives, relays, meters and control electronics.

Key Features and Specifications

Three-phase boards in Pakistan face more than simple overload risk. They carry VFDs, PLC panels, elevators, compressors, data-room air conditioning, textile auxiliaries and solar inverter outputs. One serious surge can damage more than one device at once. That is why 4P SPD deserves its own page and its own buying logic.

A 4P SPD is not just a bigger 2P SPD. It belongs to a different board category, a different risk profile and a different buyer intent.

Technical Specifications

In 3-phase work, the bigger mistake is assuming an SPD is optional because “the board already has breakers.” Breakers do not respond to the same problem. MCBs and MCCBs protect against overcurrent. SPD addresses fast transient overvoltage. They are different devices for different faults.

For solar ACDBs and commercial generator-linked systems, this distinction matters even more because switching events are common. The buyer here is usually not protecting one TV. The buyer is protecting a whole board full of controls and expensive equipment.

Product Range and Models

Do not pick the highest discharge number blindly. Surge coordination depends on site exposure, equipment value and board design. Many commercial boards are well served by 20/40kA class. Higher values are selected when the risk profile and panel design justify them.

Applications in Pakistan

This page is written for buyers protecting panels, not sockets. Hospitals, schools, factories, plazas, textile floors and solar commercial sites are the natural audience. That is why its content must stay clearly separate from the 2P SPD page.

Sizing and Selection Guide

Pole count is the first decision. Surge capacity is the second. Earthing quality is always part of both decisions.

CNC vs Competitors

For 3-phase installations, the real competitor is often no protection at all. That usually looks cheaper until one drive, one ATS controller or one lift board fails.

What This Product Does NOT Protect Against

• It does not protect against sustained under-voltage or over-voltage. Add a voltage protector where that risk exists.
• It does not replace MCCB, fuse or breaker protection for overcurrent faults.
• It does not remove the need for proper earthing and bonding throughout the 3-phase board.
• It does not guarantee survival from every direct lightning event without wider lightning protection design and correct installation practice.
• It does not cure poor neutral management, loose lugs or unsafe ATS/generator wiring.

A 4P SPD is one layer of protection, not the whole electrical design. That honest message prevents wrong expectations and bad installations.

Installation Guide

• Install the SPD inside the 3-phase board on rail space close to the incoming side and earth bar layout.
• Keep conductors short, direct and neatly routed. Extra lead length reduces surge performance.
• Coordinate the SPD with upstream protective device practice in the panel design.
• Check the site earthing and bonding condition before commissioning the system.
• Mark the board drawings or labels so future electricians know a 4P SPD is installed and can inspect it during maintenance.

Three-phase boards get crowded quickly. Good installation is not only about fitting the SPD physically. It is about keeping the wiring short and disciplined despite limited space around MCCBs, ATS units and meters.

Related Products

4P SPD is usually purchased as part of a larger 3-phase board strategy. These links are selected around commercial and industrial panel protection.

• SPD collection — See other AC surge protection options and capacities.
• MCCB collection — Protect the incoming and feeder circuits around the same board.
• ATS collection — Many protected 3-phase boards also include automatic transfer switching.
• Changeover switches — Useful where manual source selection still exists in commercial boards.
• Voltage protectors — Add sustained voltage protection where the site supply is unstable.
• DB boxes — Organize commercial or plant distribution hardware properly.
• SPD guide — Helpful for explaining surge protection to clients and site teams.
• Net metering guide — Relevant for 3-phase solar users coordinating AC-side protection.
• Fire extinguisher collection — Three-phase boards also need electrical fire protection.
• DIN rail fire extinguisher — Final add-on for large commercial and industrial panels.

Frequently Asked Questions

Why do I need 4P SPD on a 3-phase board?

Because the board carries multiple phases and often sensitive controls. A 4P SPD gives whole-board transient surge protection in the correct pole format.

Can 4P SPD be used on solar ACDB?

Yes. It is commonly relevant on the AC side of commercial and three-phase solar systems when coordinated properly with the rest of the board.

Is 20kA/40kA enough or should I buy 60kA/80kA?

That depends on exposure level, system design and the value of the equipment being protected. Higher numbers are not automatic proof of better selection.

Does 4P SPD replace voltage protector?

No. SPD handles fast transient spikes. Voltage protectors handle long-duration over and under-voltage conditions.

Can I install 4P SPD without checking earth resistance?

That is poor practice. Earthing quality directly affects SPD performance.

Will it protect VFD and PLC panels?

It helps reduce surge exposure to them when installed correctly at the board level. That is one of the main reasons to use it.

Is 4P SPD only for factories?

No. It is also useful in commercial buildings, lifts, schools, hospitals, plazas and 3-phase solar systems.

Which Pakistani cities commonly need 4P SPD?

Any city with commercial or industrial boards does. Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Peshawar and Sialkot all have sites where 3-phase surge protection makes economic sense.

Final Word

The CNC YCS6-C AC 4P SPD is meant for 3-phase boards where one surge can damage several expensive devices at once. Starting price is Rs.4,800. It is relevant for factories, lifts, solar ACDBs, offices and commercial buildings across Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Peshawar and Sialkot. Orders above Rs.10,000 qualify for free delivery. For capacity selection or board coordination help, WhatsApp 0326-1111376.