APC Smart-ups SRT 6000VA RM 230V Marine - SRT6KRMXLIM

APC by Schneider Electric SRT6KRMXLIM 6kVA Online Double-Conversion Marine UPS 230V

Overview

The APC by Schneider Electric SRT6KRMXLIM is a 6kVA (6000W) rack-mount, double-conversion online UPS rated for 230V marine environments — purpose-built for installations where grid power is unstable, dirty, or simply unavailable and load continuity is non-negotiable. Double-conversion topology means incoming AC is continuously rectified to DC and then re-inverted to a clean sine wave output, so your connected equipment never runs on raw utility power at all. That translates directly to zero transfer time during utility failures — critical for surveillance servers, network core equipment, and edge computing infrastructure where even a 20ms transfer gap can trigger reboots or recording gaps.

The SRT6KRMXLIM is designed to accommodate the wide voltage swings common in marine and industrial shore-power environments: the unit accepts input from 160V to 275V without switching to battery, and its input frequency range of 40–70 Hz handles generator power that drifts well outside the standard 50/60 Hz band. For any deployment fed by a generator, shore connection, or variable utility feed, that tolerance range is a fundamental spec — not a bonus feature. Explore the full UPS and uninterruptible power supply catalog for related models and accessories.

Key Features

• Double-Conversion Online Topology: The load runs entirely on inverted DC power at all times — not utility power passed through a switch. When utility fails, there is zero transfer time and zero waveform disruption. For NVR arrays and server infrastructure, this eliminates the brief voltage dip that causes OS-level panics on cheaper UPS designs.
• 6000W True Output Capacity: Full 6kVA at unity power factor means the nameplate wattage is the real load ceiling — no derating math required. Enough headroom to carry a dense rack of PoE switches, IP cameras, and a mid-range NVR simultaneously without running close to the thermal limit.
• Pure Sine Wave Output: Sensitive active PFC power supplies found in modern servers, NVRs, and network switches require true sine wave input. Stepped approximation or modified sine wave outputs can cause fan noise, overheating, or outright failure in PFC loads. The SRT6KRMXLIM delivers a clean sine wave regardless of input condition.
• Output THD of 3%: Total harmonic distortion below 5% is the threshold most sensitive electronics tolerate without degradation. At 3%, the SRT6KRMXLIM keeps harmonic loading off downstream equipment — relevant in mixed-load racks where audio, video, and computing loads share a common bus.
• Wide Input Voltage Window (160–275V): The unit stays on utility power across a 115V swing without touching the battery. In shore-power or generator-fed installations where voltage sags to 180V or spikes to 260V regularly, this range dramatically extends battery life by reserving it for genuine outages rather than routine sags.
• Input Frequency Tolerance (40–70 Hz): Generator sets under load frequently drift to 47 or 53 Hz. The SRT6KRMXLIM accepts that range without alarming or switching to battery — a practical necessity in any generator-primary installation.
• 480J Surge Energy Rating: Handles transient spikes common in marine and industrial power environments — inductive load switching, lightning-coupled surges on shore-power pedestals. Surge energy is absorbed before it reaches connected equipment.
• Emergency Power Off (EPO) Support: Hardwired EPO contact allows integration with building or vessel emergency shutdown systems. Required for marine classification in many jurisdictions; also standard practice for data center-class installations.
• 55 dB Noise Level: Double-conversion UPS designs run fans continuously. At 55 dB, the SRT6KRMXLIM is audible in a quiet server room but acceptable in a dedicated comms or equipment space. Not rated for open-office or noise-sensitive environments without acoustic isolation.
• Auto-Restart: After a battery-exhaustion shutdown, the unit restarts automatically when utility power returns — no manual intervention required. Essential for unmanned installations on vessels or remote sites where a technician is not available for manual restart.
• Audible Alarms: Local audible notification for battery operation, low battery, and fault conditions. In unmanned installations, pair with SNMP or network management card for remote alerting — audible alarms alone are not sufficient for remote sites.
• Crest Factor 3:1: Handles non-linear loads with high peak-to-RMS current ratios — the kind produced by switch-mode power supplies in servers and networking gear. A lower crest factor rating would derate the UPS under typical IT loads; 3:1 is appropriate for mixed rack deployments.

Integration and Compatibility

The SRT6KRMXLIM is rack-mountable and fits standard 19-inch cabinets, making it a direct drop-in for existing equipment racks in shipboard comms rooms, offshore platform control spaces, or shore-side security operations centers. Output voltage is selectable between 220V and 240V to match regional distribution standards. The EPO contact integrates with facility or vessel emergency stop circuits. For remote management, APC's SmartSlot interface (where equipped) accepts network management cards for SNMP monitoring, scheduled shutdowns, and UPS status integration into building management or security platforms. Verify network card compatibility against the specific slot configuration of the SRT6KRMXLIM before ordering. Pair this unit with a compatible managed PoE switch to protect your IP camera network infrastructure, or review our power protection category for battery extension modules and bypass panels that extend this platform's runtime and serviceability. For camera-side power planning, the IP camera category includes load-spec data to help size your UPS correctly. A network video recorder is typically the highest-draw single load in a surveillance rack — factor NVR wattage first when calculating total protected load against the 6000W ceiling.

Frequently Asked Questions

Q: What is the output power capacity of the SRT6KRMXLIM?

A: The SRT6KRMXLIM delivers 6kVA / 6000W of output power at 230V. It operates at unity power factor, so the watt and VA ratings are equal — no derating required for typical IT and surveillance loads.

Q: Does the SRT6KRMXLIM support generator input power?

A: Yes. The unit accepts input frequencies from 40 to 70 Hz and input voltages from 160V to 275V — ranges that accommodate most generator sets operating under variable load conditions without switching to battery unnecessarily.

Q: What is the transfer time to battery when utility power fails?

A: Because the SRT6KRMXLIM uses double-conversion (online) topology, the transfer time is effectively zero. The load runs continuously on inverted power; there is no switching event when utility fails.

Q: Does the SRT6KRMXLIM include Emergency Power Off (EPO) capability?

A: Yes. An EPO contact is included, allowing integration with vessel or facility emergency shutdown circuits. This is a required feature for many marine and industrial classification standards.

Q: What type of output waveform does the SRT6KRMXLIM produce?

A: The unit produces a true sine wave output with less than 3% total harmonic distortion. This is compatible with active PFC power supplies found in servers, NVRs, and enterprise networking equipment.

Q: Is the SRT6KRMXLIM suitable for rack mounting?

A: Yes, the SRT6KRMXLIM is designed for rack mounting in standard 19-inch equipment cabinets. Verify rack unit height requirements against your available rack space before installation.

Jerry Tildsen

The SRT6KRMXLIM is the unit I reach for when a customer's power environment is genuinely hostile — marine shore connections, offshore generator feeds, or industrial facilities where input voltage swings 50V in either direction on a normal day. The 160–275V input window is not marketing language; it's the difference between a UPS that stays on utility and conserves battery life versus one that cycles batteries every time the dock voltage dips, shortening runtime and service intervals in parallel.

Technical Highlights:

• Double-Conversion Topology: Zero transfer time on utility failure — the load never touches raw utility power. For surveillance NVRs running continuous recording, even a 20ms brownout can corrupt an active write buffer. Online double-conversion eliminates that failure mode entirely.
• 40–70 Hz Input Frequency Range: Generator sets under load routinely drift to 47 or 63 Hz. Most UPS designs alarm and transfer to battery at ±3 Hz deviation. The SRT6KRMXLIM absorbs that drift without touching the battery — a critical operational advantage in any generator-primary or shore-power installation.
• 3% Output THD: Clean enough for active PFC server supplies, precision network timing equipment, and industrial control loads sharing the same protected bus. Lower distortion also means downstream transformers and filters run cooler under sustained load.

Deployment Considerations:

• The 55 dB continuous fan noise is real — plan for an enclosed equipment space or dedicated comms room. Open rack deployments in control rooms with personnel will require acoustic treatment or isolation panels.
• EPO integration must be wired correctly to avoid nuisance trips; verify contact polarity and dry-contact vs. voltage requirements against your facility shutdown controller before commissioning.

The SRT6KRMXLIM is the right specification for shipboard AV and surveillance infrastructure, offshore platform control racks, and any shore-side security operations center fed by a generator with variable frequency output — environments where a standard UPS would alarm constantly and burn through batteries within months.