SKU: 31485988294

Vertiv Liebert Maintenance Bypass Cabinet 20KVA| 208V/120V - (3) L14-30R

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Description

Vertiv Liebert Maintenance Bypass Cabinet 20KVA| 208V/120V - (3) L14-30RThe Vertiv Liebert Maintenance Bypass Cabinet 20KVA (VMBC 20KMVRT4U) is a purpose built solution designed to simplify UPS maintenance and service for Vertiv Liebert GXT5 15 20kVA and APS 1 2 5 6 UPS models. With a rugged,4U rack mount enclosure and integrated bypass functionality, this cabinet provides a safe, reliable bypass path that keeps critical loads powered while technicians service or replace the UPS. Its the ideal accessory for data centers,

The Vertiv Liebert Maintenance Bypass Cabinet 20KVA (VMBC-20KMVRT4U) is a purpose-built solution designed to simplify UPS maintenance and service for Vertiv Liebert GXT5 15-20kVA and APS 1/2/5/6 UPS models. With a rugged,4U rack-mount enclosure and integrated bypass functionality, this cabinet provides a safe, reliable bypass path that keeps critical loads powered while technicians service or replace the UPS. It’s the ideal accessory for data centers, server rooms, and other facilities where uptime matters, delivering seamless maintenance without compromising protection or performance.

  • Safe maintenance bypass: The built-in bypass switch routes power around the UPS, enabling maintenance or replacement without interrupting downstream loads. This essential feature keeps critical systems online and reduces downtime during service windows.
  • Designed for Liebert GXT5 and APS UPS models: Specifically engineered for Liebert GXT5 15-20kVA and APS 1/2/5/6 architectures, ensuring a compatible, streamlined integration into existing power protection infrastructure.
  • 20 kVA output capacity with 208V/120V compatibility: The cabinet supports 20 kVA of power distribution, compatible with standard 208V/120V electrical environments common in data centers and mission-critical spaces.
  • Three L14-30R receptacles for flexible distribution: The enclosure provides (3) L14-30R outlets to distribute power to connected equipment, enabling efficient load management and balanced distribution during both normal operation and maintenance.
  • Rugged, service-friendly enclosure: A durable, front-accessible cabinet designed for safe maintenance operations, easy wiring, and rapid serviceability in busy data center environments.

Technical Details of Vertiv Liebert Maintenance Bypass Cabinet 20KVA

  • Model: VMBC-20KMVRT4U
  • Power rating: 20 kVA output capacity
  • Input/Output voltage: 208V / 120V compatible
  • Receptacle configuration: (3) L14-30R outlets for load distribution
  • Enclosure: 4U rack-mount maintenance bypass cabinet
  • Compatibility: Designed for Vertiv Liebert GXT5 15-20kVA and APS 1/2/5/6 UPS models
  • Purpose: Provides a dedicated bypass path to isolate the UPS for maintenance while continuing to feed critical loads
  • Application: Data centers, server rooms, and other configurations requiring reliable downtime protection during UPS service

How to install Vertiv Liebert Maintenance Bypass Cabinet 20KVA

Installing the Vertiv Liebert Maintenance Bypass Cabinet 20KVA should be performed by qualified personnel with electrical safety training. Begin by reviewing the product manual and the specific installation guidelines for VMBC-20KMVRT4U to ensure all compliance and safety requirements are met. The installation process is designed to integrate into existing Liebert GXT5 15-20kVA or APS UPS configurations with minimal disruption to ongoing operations.

  • Step 1 — Plan and verify credentials: Confirm that your site voltage matches the cabinet’s 208V/120V configuration and verify space, rack mounting compatibility, and clearance for service access. Ensure you have the appropriate maintenance window and notify affected teams before commencing work.

  • Step 2 — Power down and isolate the UPS: Follow your facility’s shutdown procedures to safely de-energize the UPS. Use appropriate lockout/tagout procedures to prevent accidental re-energization during installation.

  • Step 3 — Mount and position the MBC: Install the VMBC-20KMVRT4U in the designated rack position near the UPS, ensuring proper alignment and adequate ventilation. Route wiring channels for clean, protected cabling and minimize bend radii for long-term reliability.

  • Step 4 — Connect input, bypass, and outputs: Connect the cabinet’s input to the mains supply and wire the bypass path according to the manual. Route load connections through the (3) L14-30R receptacles, ensuring correct phase balance and adequate circuit ratings for the connected equipment.

  • Step 5 — Validate and test: Re-energize the system and perform a controlled bypass test under guidance from the maintenance manual. Verify that loads remain powered when the UPS is taken offline and confirm voltages, protection devices, and alarms are functioning correctly.

  • Step 6 — Documentation and handoff: Record installation details, including wiring routes, receptacle assignments, and test results. Update facility drawings and security logs as needed and brief operations staff on daily operation and maintenance procedures.

Frequently asked questions

  • Q: What is a maintenance bypass cabinet?

    A: A maintenance bypass cabinet provides a dedicated bypass path that allows technicians to service or replace the UPS without interrupting power to connected loads. It keeps critical systems online during UPS maintenance by routing power through an alternate path.

  • Q: Which UPS models are compatible with the Vertiv Liebert Maintenance Bypass Cabinet 20KVA?

    A: It is designed for Vertiv Liebert GXT5 15-20kVA and APS 1/2/5/6 UPS models, ensuring a seamless integration with existing Liebert power protection infrastructure.

  • Q: How many receptacles does the cabinet provide?

    A: The cabinet features three L14-30R outlets to support flexible distribution of connected loads during maintenance and normal operation.

  • Q: What voltage is supported?

    A: The unit supports 208V/120V configurations, aligning with common data center electrical standards for Liebert UPS systems.

  • Q: Is installation required to be performed by a licensed electrician?

    A: Yes. Because this equipment interfaces with high-voltage power systems and critical loads, installation and commissioning should be performed by qualified electrical professionals following manufacturer instructions.

  • Q: Does the maintenance bypass cabinet guarantee uninterrupted load during maintenance?

    A: When properly configured and tested, the bypass path allows continued power delivery to connected loads while the UPS is serviced, minimizing downtime and preserving uptime for essential equipment.

Shipping Notes
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  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 31485988294

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4.4 ★★★★★
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Verified Purchase
Joy
Omaha, US
★★★★★ 5
Extremely durable, dogs love them
Color: 2 PC-Beef-Red, Color: 2 PC-Beef-Red
I was looking for the toughest and most durable dog chew bone I could find and this is it. I have bought multiple other brands that claim to be very durable and tough for a very long time and this is the one for sure. The shower has described this phone accurately and it truly does last. I purchased this bone about 2 months ago. As you see from the photos attached, this is a very well made chew bone and my aggressive pitbulls can't tear it apart do they try. They never get tired of it and chewing it every single day for hours on and keeping them very occupied. I have two bones and three pitbulls that chew on it every day. It is so adorable and has an awesome flavor to it which I think entices them even more to want to chew on it. The durability and Lasting power is amazing to me with these tough chewers. I highly recommend this product to everyone out there. I will say only one negative and that is that the middle wraparound piece they were able to pull off but that is not a big deal because there is plenty of bone which was under that cover in the middle of the bone. There's a few mauled chips missing from the ends but the life of this bone is obviously going to be a long time which really surprised me. Give it a shot if you have heavy duty chewers and you will find how awesome this phone really is and it's durability and strength our second to none in my opinion.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 5, 2025
W
Verified Purchase
WhoFan69
Dallas, US
★★★★★ 5
My dog loves it.
Color: 1 PC-Beef-Red
My dog is a super aggressive chewer when it comes to toys. Anything that is soft he rips apart. This one has a wonderful squeaky sound that makes him happy and he enjoys the smell of it. This is a very strong material and definitely worth the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
J
Verified Purchase
jeniene
Los Angeles, US
★★★★★ 4
Durable!
Color: 1 PC-Beef-Red
Alright, here's a product review for those Tough Dog Toys: Finally, a Toy That Survives My Monster! - Tough Dog Toys Review As the owner of a determined (and I mean determined) large breed chewer, finding toys that last longer than five minutes has been a constant and often frustrating quest. I've gone through countless plush toys ripped to shreds, rubber toys with chunks missing, and even some "indestructible" toys that met their demise far too quickly. That's why I was both hopeful and skeptical when I came across the Tough Dog Toys, designed specifically for aggressive chewers and large breeds. Let me tell you, these bone-shaped nylon toys are living up to their name. My power-chewing Labrador has been going at this thing for days now, and I'm genuinely impressed. Where other toys have succumbed to his relentless gnawing, the Tough Dog Toy has held its own. There are some minor teeth marks, as expected, but absolutely no significant damage, no pieces torn off, and no signs of imminent destruction. "Almost indestructible" might actually be an understatement! The design is simple but effective. The solid nylon construction feels incredibly durable, and the bone shape is easy for my dog to grip and maneuver. It's also a good size for a large breed – substantial enough that he can really get a good chew going without it disappearing in his mouth. What I appreciate most is the peace of mind this toy provides. I no longer have to constantly supervise playtime, fearing that he'll ingest pieces of a destroyed toy. This feels like a safe and long-lasting option for even the most enthusiastic chewers. Pros: * Truly durable – stands up to aggressive chewing from a large breed. * Solid nylon construction feels virtually indestructible. * Safe design with no small parts to break off. * Good size and shape for large dogs to grip and enjoy. * Provides long-lasting entertainment. Cons: * May show some teeth marks over time (though this hasn't compromised its integrity). * It's a fairly hard material, so dogs who prefer softer toys might not be as interested. Overall: If you're at your wit's end trying to find a toy that can withstand your aggressive chewing large breed dog, I highly recommend giving the Tough Dog Toys a try. This bone toy has proven to be the most durable option we've encountered, offering excellent value for money and, most importantly, a safe and engaging chewing experience for your furry friend. Five out of five paws!
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Reviewed in the United States on May 16, 2026
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Verified Purchase
Amazon Customer
Boise, US
★★★★★ 5
Very well made chew bone!
Color: 1 PC-Beef-Red
Great durable, very well made chew bone! Our dog usually tears up all his toys within a few minutes or sometimes hours after he gets them. He’s had this bone for a few days and it’s still in one piece. Except for the rubber that’s in the middle, he chewed up in a couple of days. I would definitely buy more chew toys made by this company! Well worth the money!
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Reviewed in the United States on May 30, 2026
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Verified Purchase
Pittieluv79
Alexandria, US
★★★★★ 3
The rubber middle is not durable, it lasted less than 3 hours.
Color: 1 PC-Beef-Red
I bought this as I have bully/husky puppies (9 months old) and a pitt/doberman (9 years old). They are heavy chewers and destroy everything. I saw a video of this toy. The woman said that her dog chewed on it for a while (about 2 hours or so) she showed the ends visibly chewed, which I expect but it was holding up. The rubber middle seemed to hold up to. I received this yesterday. I had to take it away from them last night as they were chewing the rubber middle off. They had it maybe 3 hours. I didn't give it a lower star score as I will just cut the rubber off and give it back to them. So I was disappointed in the rubber middle not being more durable but the hard plastic it's made from is the strong material they need.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026

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