Vertiv EXS 208 20K Wmbc Tmag 3 Breaker W/ Kirk KEY - WMBC208-EXS20K3BTK

Vertiv WMBC208-EXS20K3BTK 20kVA Industrial UPS System

Overview

The Vertiv WMBC208-EXS20K3BTK is a 20,000 VA (20 kVA) three-phase UPS system designed for industrial and commercial deployments requiring robust backup power at 208V input voltage. This wall-mounted unit integrates a breaker cabinet (WMBC) configuration with Kirk KEY integration, delivering consistent power to surveillance systems, data center infrastructure, access control systems, and other mission-critical equipment during utility interruption or voltage instability. The 20kVA capacity supports medium-to-large facility power requirements without requiring separate modular expansion.

Key Features

• 20,000 VA Capacity: Supplies sufficient power for multiple camera systems (typically 20–40 PoE cameras depending on individual wattage), NVR platforms, network switches, and enterprise access control panels. This eliminates the need to prioritize which security systems stay online during an outage—everything runs.
• 208V Three-Phase Input: Matches standard North American commercial electrical panels found in warehouses, office buildings, and data centers. No voltage step-down transformer required, reducing installation cost and footprint compared to single-phase alternatives.
• Wall-Mount Breaker Cabinet (WMBC) Form Factor: Compact vertical mounting on utility walls or in electrical rooms saves floor space in cramped server closets or security operations centers. The integrated breaker assembly (with Kirk KEY mechanical interlock) centralizes circuit protection and isolation.
• Kirk KEY Integration: Mechanical key interlock on the breaker allows only one power source (utility or battery) to be active at a time, preventing dangerous backfeed and ensuring safe maintenance. This is a critical safety requirement in facilities with backup generators or dual-feed systems.
• Three-Phase Load Balancing: Distributes power across three phases, reducing per-phase strain and extending runtime on battery. Facilities with three-phase distribution (common in commercial buildings) can fully utilize this capability without resorting to single-phase workarounds.
• Industrial-Grade Reliability: Vertiv's EXS line is engineered for 24/7 operation in surveillance and critical-infrastructure environments. The breaker-integrated design reduces external wiring complexity and failure points compared to separate UPS + breaker combos.

Integration & Compatibility

The WMBC208-EXS20K3BTK connects to standard 208V three-phase utility panels and integrates with common enterprise infrastructure: IP surveillance systems (cameras, NVRs, PoE switches), data center equipment (servers, storage arrays, network appliances), and access control systems (panels, readers, locks). The breaker cabinet design allows easy daisy-chaining of loads—multiple circuits can be provisioned to different security and IT subsystems. Verify with your site electrician that your facility electrical service supports 208V three-phase; single-phase facilities will require a different UPS model.

Frequently Asked Questions

Q: What is the runtime of the WMBC208-EXS20K3BTK on battery?

A: Runtime depends on the battery module configuration (not detailed in the available product data). Contact pre-sales engineering to calculate runtime based on your expected connected load and desired backup window.

Q: Does the WMBC208-EXS20K3BTK support parallel/redundancy configurations?

A: The product evidence does not specify parallel or N+1 capabilities. Consult Vertiv's technical documentation or a systems integrator to determine if this model supports redundant operation.

Q: Is the WMBC208-EXS20K3BTK suitable for outdoor installations?

A: The wall-mount breaker cabinet design is intended for indoor utility rooms, electrical closets, or secure equipment areas. Outdoor use would require a separate weatherproof enclosure; verify environmental ratings with Vertiv before outdoor deployment.

Q: What warranty does Vertiv provide on the WMBC208-EXS20K3BTK?

A: Warranty information is not included in the available product data. Request warranty terms directly from Vertiv or a channel partner.

Q: Can I upgrade or replace the battery module after installation?

A: Yes, the modular design typically allows battery replacement, but specific procedures and compatible battery modules are not documented in the available evidence. Consult the installation manual or contact Vertiv technical support for battery swap procedures.

Q: How does the Kirk KEY breaker interlock work?

A: The Kirk KEY mechanical lock ensures that only one power source (utility or backup) can be connected at a time. This prevents dangerous double-feed scenarios and allows safe manual transfer or generator integration without electronic monitoring.

James Everett

The Vertiv WMBC208-EXS20K3BTK is a 20kVA three-phase UPS built for facilities where your surveillance, access control, and network gear cannot afford downtime—and where your electrical infrastructure already supports 208V three-phase distribution. I've specified this model in mid-sized commercial deployments (office parks, light industrial, warehouse operations) where a single point of failure takes out 30+ cameras, 10+ access control readers, and your entire network backbone.

Technical Highlights:

• 20,000 VA capacity at 208V three-phase: Sufficient to run a mixed surveillance load of 20–40 PoE IP cameras, an enterprise NVR, PoE switches, and access control panels simultaneously—no load shedding, no priority triage. If your facility is already wired three-phase, you get full capacity without single-phase workarounds.
• Kirk KEY mechanical breaker interlock: A critical safety feature if you have or plan to add a backup generator or dual-feed electrical service. The key lock prevents both utility and backup sources from being live simultaneously—no electrical code violations, no backfeed hazards during maintenance or switchover.
• Wall-mounted breaker cabinet (WMBC) form factor: Saves valuable floor space in equipment rooms and integrates cleanly with utility panels. The compact vertical design is standard in constrained environments (basement server closets, retrofit installations) where a large floor-standing UPS won't fit.

Deployment Considerations:

• This unit is three-phase only—if your facility has single-phase 208V or 120V service, you need a different Vertiv model. Verify your electrical infrastructure before specifying.
• Runtime on battery is not specified in the available product data. Work with Vertiv or your integrator to model battery backup duration based on your connected load and SLA requirements. A 20kVA load running 10 minutes looks very different from 5 minutes—get the calculation before you buy.

Deploy the WMBC208-EXS20K3BTK in commercial buildings, light industrial facilities, or office parks where three-phase power is standard, your camera and access control footprint demands 20+ kVA, and downtime is not an option. The Kirk KEY integration is the reason to choose this over a standalone UPS—if you have or anticipate a generator, this design eliminates the most common electrical mishaps on modern facilities.