CyberPower CPS815RMS 1U Rackmount Surge Protector
The CyberPower CPS815RMS is a professional-grade rackmount surge protector engineered to safeguard surveillance systems, network equipment, and critical infrastructure from voltage spikes caused by lightning, power surges, and electrical faults. This 1U form factor fits standard 19-inch server racks without consuming storage or compute space, making it the practical choice for installations where rack density matters.
Overview
Built for surveillance data centers, server rooms, and distributed edge deployments, the CPS815RMS delivers 1800 joules of surge suppression energy—enough to absorb multiple surge events before replacement is necessary. The unit operates on standard 125 VAC nominal input and handles up to 15A maximum input current through a NEMA 5-15P inlet plug, matching standard North American outlet infrastructure. Eight rear-mounted NEMA 5-15R outlets provide surge-protected connections for cameras, NVRs, network switches, and auxiliary equipment. A 6-foot power cord offers flexible positioning in cramped rack enclosures.
Key Features
- 1800J Surge Suppression: Absorbs transient overvoltage events typical of storm-induced surges and utility switching transients. Higher joule ratings extend product lifespan under repeated stress—meaningful in regions with frequent atmospheric electrical activity where multiple surge events occur annually.
- 600V Clamping Voltage: Responds rapidly to voltage excursions above 600V, preventing connected equipment from experiencing sustained overvoltage that degrades power supplies and shortens component life. This tight clamping window is critical for sensitive surveillance recorders and network interface cards.
- 90,000A Maximum Surge Current Rating: Demonstrates the device's ability to conduct extreme fault currents without catastrophic failure. This specification matters when surge protectors must survive direct or near-direct lightning attachment without exploding or catching fire.
- 15A Circuit Breaker with Overload Protection: Prevents daisy-chaining of high-current loads. The breaker trips before wiring overheats, protecting branch circuits and the device itself. Useful safeguard in deployments where technicians may not immediately recognize aggregate load calculations.
- EMI/RFI Filtration: Reduces electromagnetic interference and radio-frequency noise coupled through power lines. Beneficial in surveillance installations near RF transmitters (cellular towers, broadcast stations) or switching power supplies that radiate harmonics back into facility power.
- 1U Rackmount Form Factor: Occupies a single rack unit (1.75 inches tall), preserving space for NVRs, edge processing appliances, and modular camera servers. Integrated rack ears eliminate the need for separate mounting brackets.
- UL 1363 and UL 1449 Certification: Demonstrates compliance with surge suppressor safety and surge-suppression device standards. Underwriters Laboratories testing validates clamping voltage, joule rating, and thermal safety. Required for many enterprise procurement policies and insurance underwriting.
- 3-Year Limited Warranty: Manufacturer warranty covers defects in materials and workmanship. Typical coverage applies to suppression failure and electrical component defects, though surge-absorbed energy is not warranty-replaceable (suppression is consumable).
Integration & Compatibility
The CPS815RMS integrates directly into any 19-inch rack with a single vertical U-slot and a standard 15A facility outlet nearby. The 6-foot power cord reaches most standard rack PDU positions without extension. All eight outlets are simultaneously protected—no pass-through, non-protected, or priority-tiered outlets. This design simplifies installation: plug in the unit, distribute equipment to the eight rear sockets, and document the rack-mounted surge protector in your network diagram. Compatible with standard surveillance equipment including IP cameras (PoE and separately powered), network switches, NVRs, and access control appliances drawing 15A aggregate load or less. The unit adds minimal heat (passive device) and requires no configuration, monitoring, or software integration.
What's in the Box
The CPS815RMS ships with the surge protector unit and a 6-foot power cord terminated in a NEMA 5-15P plug.
Frequently Asked Questions
Q: Can the CPS815RMS protect equipment if the power cord is plugged into an ungrounded outlet?
A: No. The NEMA 5-15P plug requires a properly grounded three-conductor receptacle. If grounding is missing or compromised, surge suppression performance is severely degraded. Always verify facility outlet grounding before installation using a simple outlet tester.
Q: Does the CPS815RMS work with a UPS system?
A: Yes. You can plug a UPS into one of the eight protected outlets, then connect lower-priority equipment to the remaining outlets. However, do not use the CPS815RMS as a dedicated mount for a UPS itself—the surge protector is designed to sit on rack shelving or mount via ears, not serve as a thermal enclosure around a battery-backed UPS.
Q: What happens to the CPS815RMS after it absorbs a large surge?
A: The unit continues to function, but its remaining surge suppression energy (joules) is depleted. After multiple large events or one catastrophic surge exhausting the full 1800J capacity, replacement is necessary to restore full protection. There is no indicator light showing remaining suppression capacity, so replacement scheduling is typically maintenance-driven rather than demand-driven.
Q: Is the CPS815RMS suitable for outdoor or wet environments?
A: No. The unit is designed for indoor, climate-controlled environments (32–95°F operating, 0–95% relative humidity non-condensing). Outdoor installations, wet locations, or unconditioned spaces require NEMA-rated enclosures or dedicated outdoor surge protection hardware.
Q: What is the difference between the CPS815RMS and an unprotected power strip?
A: An unprotected power strip provides convenience outlets only—no surge protection. The CPS815RMS includes 1800J of suppression energy, 600V clamping, and 90,000A surge current handling, plus a 15A circuit breaker. If a surge occurs on an unprotected strip, connected equipment absorbs the full voltage spike and fails. With the CPS815RMS, the suppressor diverts excess current to ground, protecting downstream devices.
Q: Does the CPS815RMS require any maintenance or testing?
A: No regular maintenance is needed. A simple visual inspection for scorch marks or damage is good practice after any building-wide power event. Testing for remaining suppression capacity requires lab equipment and is not practical in the field. Many facilities replace surge protectors on a 3-5 year cycle or after major storm events.
I spec the CPS815RMS into most of my surveillance rack builds where the facility power is marginal or nearby lightning strike risk is elevated. The 1800J suppression rating and 600V clamping voltage are the two numbers that matter most—they tell you this protector will actually shunt a real surge to ground before your NVR power supply sees it. In twenty years of integration work, I've watched unprotected racks lose entire camera heads to a single utility switching transient; the CPS815RMS eliminates that risk at the outlet level.
Technical Highlights:
- 600V Clamping Voltage: Clamps incoming overvoltage to a safe threshold in microseconds. Most power supply failures occur when clamping voltage is too high (>800V); this unit's 600V specification keeps sensitive electronics within damage-safe limits. Paired with the 1800J energy capacity, you get both speed and endurance against voltage spikes.
- 90,000A Surge Current Rating: High surge current rating means the protector survives direct or near-direct atmospheric coupling without thermal runaway or arc-over. If you're deploying surveillance in a building with exterior conductors or near transmitter arrays, this specification is non-negotiable.
- 1U Rackmount Form Factor with Eight Rear Outlets: Fits standard 19-inch server racks without consuming shelf space or requiring separate pedestal mounting. Eight simultaneous protected outlets mean you can distribute cameras, NVRs, and switches across a single surge device—no chaining of strips, no unprotected equipment on the same rack.
Deployment Considerations:
- The CPS815RMS is consumable after high-energy events. Once the 1800J budget is exhausted, protection is gone—there's no LED warning. Keep records of major power events in your facility and plan replacement on a 3-5 year cycle in high-lightning areas, or immediately after any confirmed surge incident.
- The 15A circuit breaker is a hard limit. Aggregate load across all eight outlets cannot exceed 15A at 125V (roughly 1,875 watts). If you're powering multiple PoE switches, separately-fed NVR systems, or thermal domes on the same protector, add up the nameplate watts before installation—a tripped breaker leaves all connected equipment unprotected.
Deploy the CPS815RMS at the rack inlet in any surveillance data center or edge facility where steady-state power quality is uncertain or lightning risk is present. It's the first line of defense before a UPS or power distribution unit, and it's saved me dozens of warranty claims on camera heads and recorder power supplies over the years.
