CyberPower OL3KRTHD Online Double-Conversion UPS
Overview
The CyberPower OL3KRTHD is a 3000VA/2700W online double-conversion UPS built for surveillance centers, network operations centers, and critical infrastructure where continuous clean power is non-negotiable. Unlike standby designs that switch to battery on mains failure, the OL3KRTHD continuously conditions input power through its conversion circuit — meaning equipment draws from battery-backed circuitry at all times. This 2U form factor delivers zero-transfer-time switchover, eliminating the brief power gap that can corrupt recordings or crash NVRs during brownouts. The topology, combined with a 0.9 power factor and <3% harmonic distortion, makes it suitable for dense rack environments with sensitive video and networking hardware.
Key Features
- Online Double-Conversion Topology: Power flows through a rectifier, inverter, and battery circuit at all times — not just during outages. This eliminates transfer time entirely (0 ms) and filters voltage sags, surges, and frequency variations before they reach your equipment. For surveillance systems running 24/7, this prevents the micro-interruptions that trigger redundancy failovers or cause frame drops.
- 3000VA Capacity at 0.9 Power Factor: Delivers 2700W of usable power — roughly enough for a modular NVR (300–500W), four to six IP cameras (40–80W each), a managed PoE switch (60–120W), and a small edge server. The 0.9 PF means you're not oversizing for reactive loads common in commercial installations.
- Runtime: 2.7 minutes at full load, 8.5 minutes at half load: At 1350W (half load), you've got eight minutes to orderly shut down systems or failover to a generator. Full-load runtime is short, but typical surveillance rack power draw (1500–1800W) lands closer to the half-load window, buying you five to seven minutes of battery autonomy.
- Seven Outlets (6× NEMA 5-20R + 1× NEMA L5-30R), All Switchable: The L5-30R passthrough lets you daisy-chain a larger power distribution unit or redundant UPS without loss of control. Each outlet bank can be independently switched off via management software — useful for shedding non-critical loads (e.g., test servers) when battery runtime becomes critical.
- PowerPanel Business Edition Management: USB, Serial, SNMP, and EPO (Emergency Power Off) ports enable integration with Milestone XProtect, Genetec Security Center, and other VMS platforms. Set battery-threshold alerts, schedule controlled shutdowns, and remotely monitor load and battery health. Optional RMCARD205 allows web-based remote management if you need multi-site oversight.
- Sealed Lead-Acid Battery Pack (4× 12V/9Ah): Typical recharge time is four hours (0% to 90%), and the sealed design is maintenance-free — no fluid checks or equalization. Battery modules are user-replaceable if runtime degrades after 3–5 years.
- Sine Wave Output, User-Configurable Voltage (100/110/115/120/125 VAC ± 2%): Unlike stepped square-wave UPS designs, the sine-wave output is safe for motor-driven equipment (PTZ pan-tilt motors, HVAC compressors, etc.) and reduces electromagnetic noise that can degrade video quality. Configurable output lets you match legacy equipment voltage requirements without external transformers.
- Automatic and Manual Bypass: If the UPS fails internally, manual bypass switches power directly from the wall to connected equipment — no shutdown required. Automatic bypass engages if battery is depleted and mains are present, safeguarding against a complete power loss.
- High Efficiency in ECO Mode (>96%): In ECO mode, the UPS minimizes inverter use when mains voltage is stable, reducing heat and extending battery life. Online mode (continuous conditioning) is available if your installation demands filtered power at all times — the tradeoff is slightly lower efficiency and higher heat output.
- 30A Hardwired Input, 10ft Power Cord (NEMA L5-30P): Designed for permanent installation in rack or wall cabinet. The heavy-gauge input plug and 10-foot cord minimize voltage drop from the panel, critical in older buildings or remote rack locations.
Integration & Compatibility
The OL3KRTHD pairs naturally with enterprise VMS platforms that support SNMP or serial UPS integration. PowerPanel Business Edition is included and works with Milestone XProtect, Genetec, OnSSI, and other ONVIF-based systems. USB direct-attach is ideal for small single-NVR installations; SNMP is the path for multi-site management. The EPO interface ties directly to access control panels or emergency systems if you need facility-wide power-down coordination. Input frequency tolerance (40–70 Hz) accommodates older or unstable utility feeds common in industrial or remote locations.
What's in the Box
1× OL3KRTHD UPS unit, 1× NEMA L5-30P power cord (10 ft), 1× USB interface cable, 1× serial interface cable, 1× battery disconnection tool, 1× installation guide, 1× PowerPanel Business Edition software CD, 1× warranty documentation.
Frequently Asked Questions
Q: Does the OL3KRTHD support SNMP monitoring?
A: Yes. The OL3KRTHD includes built-in SNMP capability via its rear-panel network port. PowerPanel Business Edition provides SNMP traps and data queries for integration with Nagios, Zabbix, or your VMS platform's monitoring console.
Q: What is the warranty period?
A: CyberPower provides a 3-year manufacturer warranty on the OL3KRTHD, covering parts and labor. Battery modules are included; replacement batteries are available separately.
Q: Can I daisy-chain multiple OL3KRTHD units for higher capacity?
A: No. The OL3KRTHD is a standalone unit and does not support parallel operation. For higher capacity, you would need a three-phase UPS or multiple independent single-phase units on different circuits.
Q: How long does the battery take to recharge after a full discharge?
A: From 0% to 90% state of charge takes approximately 4 hours under normal conditions. Full 100% recharge may take 5–6 hours. Recharge time extends if mains voltage is unstable or input current is limited.
Q: Is the OL3KRTHD suitable for outdoor or unconditioned cabinet installation?
A: No. The OL3KRTHD is designed for climate-controlled indoor racks and cabinets. Operating temperature range is 0–40°C (32–104°F). For outdoor or extreme-temperature deployments, consult the manufacturer for extended-range models or thermal enclosures.
Q: What happens if mains power fails while the UPS is in ECO mode?
A: The UPS automatically switches to online mode and draws from the battery immediately. Transfer time is 0 ms, so connected devices experience no interruption. When mains power returns and stabilizes, the UPS resumes ECO mode if configured.
I've deployed the OL3KRTHD in surveillance control rooms where mains instability is a chronic issue — aging utility feeds, shared transformer circuits, or facilities downstream of large HVAC loads. The zero-transfer-time double-conversion topology is the differentiator here. Unlike conventional offline UPS designs that introduce a 4–16 ms switchover gap (enough to cause NVR frame drops or VMS alerts), the OL3KRTHD conditions power continuously, meaning your recording pipeline never sees a glitch, even on microbursts or sags. The model number OL3KRTHD caps at 3000VA, which lands well for mid-sized surveillance clusters: one modular NVR, four to six cameras, a managed PoE switch, and a small redundancy server.
Technical Highlights:
- 0 ms Transfer Time via Online Double-Conversion: Power continuously flows through the inverter circuit, not just on battery. Eliminates the millisecond window where brownouts or frequency shifts can trigger failover or corruption. Real benefit in legacy buildings where utility voltage swings ±10% routinely.
- 2700W at 0.9 Power Factor: That 0.9 PF is important — it means the unit isn't oversizing for reactive loads. A typical surveillance rack (NVR, four cameras, PoE switch) draws 1500–1800W, so you're operating near design point without excess capacity that wastes dollars and heat.
- 8.5 Minutes at Half Load (1350W): Full-load runtime is 2.7 min, but real surveillance deployments rarely pull full 2700W. At 1350W you've got five to seven minutes to trigger a generator start or perform a graceful VMS shutdown — not a margin of luxury, but enough if your facility has generator standby logic in place.
- PowerPanel Business Edition with SNMP, USB, Serial, and EPO: Native integration with Milestone, Genetec, and most enterprise VMS platforms. SNMP traps let your NOC dashboard see battery health and load without custom middleware. The EPO port is invaluable if you need coordinated facility shutdown (access control + surveillance + HVAC all drop in sequence).
- Switchable Outlet Banks (6× NEMA 5-20R + 1× NEMA L5-30R): The L5-30R passthrough is the move if you're daisy-chaining to a PDU or redundant power feed. Each outlet group can be software-controlled for load shedding — you can flag non-critical systems (test servers, archive appliances) to drop first when battery hits 30%, preserving runtime for the NVR and management network.
Deployment Considerations:
- Runtime at full load is tight (2.7 min). If your surveillance facility actually draws 2700W continuously (very rare, but possible with legacy tower servers + dense camera counts), plan a generator overlap or accept a shorter failover window. Half-load runtime (8.5 min) is more realistic but still requires generator or orderly shutdown discipline.
- Input frequency tolerance is 40–70 Hz. Most North American utilities lock to 60 Hz ±0.5 Hz, so this is a non-issue. However, in industrial zones near welders, VFD drives, or overseas installations, that wider tolerance keeps the UPS from dropping to battery prematurely on frequency transients.
- Battery recharge time (4 hours 0–90%) is moderate. If you expect frequent brownouts or rolling blackouts, you may want a second UPS on a different utility circuit, or plan extended recovery windows. Three-phase installations can use larger CyberPower models with longer autonomy.
The OL3KRTHD is the right fit for mid-market surveillance facilities (10–30 cameras) with moderate infrastructure investment and utility feed instability. If you're in a region with frequent sags, sags, or harmonics, the double-conversion topology saves you from mysterious VMS crashes and recording corruption far better than a conventional offline or line-interactive UPS.
