Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
LEGRAND PS4100MIR9W Watertight Interlock - Watertight Interlocks
LEGRANDWatertight Interlocks

LEGRAND PS4100MIR9W Watertight Interlock

The LEGRAND Mechanical Interlock (MPN PS4100MIR9W) is a watertight interlock rated for 240V AC, three-phase, 100 A, with 3 poles and 4 wires. This non-reverse-service unit provides a mechanical interlocking function…

SKU 3G-OTH-14510

Brand
LEGRAND
Item
PS4100MIR9W Watertight Interlock
Part Number
PS4100MIR9W
Category
Watertight Interlocks
Available to Order
Also known as:PS4100MIR9WLEGRAND
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

LEGRAND
Manufacturer Part Number
PS4100MIR9W
Reverse Service
No

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

LEGRAND Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The LEGRAND Mechanical Interlock (MPN PS4100MIR9W) is a watertight interlock rated for 240V AC, three-phase, 100 A, with 3 poles and 4 wires. This non-reverse-service unit provides a mechanical interlocking function for industrial power connections.

Frequently Asked Questions

What is a LEGRAND mechanical interlock used for?

A LEGRAND mechanical interlock prevents simultaneous connection of two power sources to the same load, ensuring safe changeover in industrial power distribution. It is commonly used in generator transfer, portable power panels, and temporary power installations where watertight protection is required.

What are the specifications of the LEGRAND PS4100MIR9W interlock?

The LEGRAND PS4100MIR9W is a watertight mechanical interlock rated for 240V AC, three-phase, 100 A, with 3 poles and 4 wires. It is a non-reverse-service unit, meaning it locks in one position only. The MPN is PS4100MIR9W.

Where to buy a LEGRAND PS4100MIR9W worldwide?

3G Electric supplies the LEGRAND PS4100MIR9W mechanical interlock to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this watertight interlock.

How to install a LEGRAND mechanical interlock?

Installation of a LEGRAND mechanical interlock requires mounting in a suitable enclosure, wiring per local electrical codes, and verifying the interlock mechanism prevents both sources from being engaged simultaneously. Always disconnect power before installation and consult a qualified electrician for proper setup.

Used in

Common applications for LEGRAND
Commercial office lighting control — Legrand PS20AC1W toggle switch for single-pole on/off switching of overhead lighting circuits.
Industrial control panels — Legrand PS20AC1WL locking switch to secure equipment power status during maintenance.
Residential hallways and stairwells — Legrand NTLFULLW in-wall LED night light for low-level illumination.
Laboratory workbenches — Legrand Plugmold® NM24GBA512 dual-circuit raceway strip for powering multiple instruments.
Retail display walls — Legrand Plugmold® NM20GB512 single-circuit raceway strip for point-of-sale and display lighting.
Modular office partitions — Legrand Plugmold® NM24GB612 raceway strip with 6 outlets for flexible power distribution.
Not sure this is the right part? Photo-identify it→

LEGRAND Products

3G Electric supplies LEGRAND watertight interlocks. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

More from LEGRAND

View all LEGRAND parts →

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first