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Your Server Just Rebooted at 3:14 AM Because a Utility Truck Hit a Power Pole Three Blocks Away
The UPS battery was five years old. The self-test passed last month. The self-test does not simulate a 400ms utility voltage sag while the server is drawing 800W at peak load. When the sag hit, the UPS switched to battery in 4ms — fast enough for the server’s power supply capacitors to bridge the gap — but the battery voltage drooped below the inverter threshold before the transfer completed, and the server lost power mid-transaction. The APC Smart-UPS SRT 3000VA is the UPS that survives that scenario: double-conversion topology means the inverter is always powering the load from the battery, not switching from utility to battery when a disturbance is detected. There is no transfer time. There is no gap. The server never sees the utility power disturbance.
技術仕様
| パラメータ | 仕様 |
|---|---|
| モデル | APC Smart-UPS SRT 3000VA RM (SRT3000RMXLT or equivalent) |
| Topology | Double-conversion (online), pure sine wave output always |
| Output Power Capacity | 3,000 VA / 2,700 W |
| Input Voltage Range | 100-275 VAC (auto-sensing, no manual range selection) |
| Output Voltage | 120V or 208V or 230V (configurable), pure sine wave, <2% THD |
| 頻度 | 50/60 Hz auto-sensing, 0.1 Hz tracking accuracy |
| Transfer Time | 0 ms (online double-conversion — inverter always driving output) |
| Runtime (Full Load, 2,700W) | ~5 minutes (internal battery). まで 60 minutes with external battery pack (SRT192RMBP). |
| Runtime (Half Load, 1,350W) | ~14 minutes (内部). まで 2 hours with external battery pack. |
| Recharge Time | < 3 hours to 90 percent (internal battery) |
| Battery Type | Maintenance-free sealed lead-acid (VRLA), hot-swappable, user-replaceable |
| Battery Life (典型的な, 25c) | 3-5 年 |
| External Battery Pack Support | Up to 10x SRT192RMBP external packs (extends runtime proportionally) |
| Surge Protection | 480 Joules, UL 1449 3rd Edition |
| Outlets | 6x NEMA 5-20R (battery backup + surge), 2x additional surge-only |
| Network Management | AP9631 Network Management Card 2 (pre-installed): HTTP/HTTPS, SNMP v1/v2/v3, SSH, Telnet, Modbus TCP, BACnet/IP |
| Environmental Monitoring | AP9335TH temperature/humidity sensor port (sensor sold separately) |
| Out-of-Band Management | Dry contact I/O: UPS on-battery, low-battery, bypass active, remote shutdown, remote reboot |
| Audible Alarm | On-battery, low-battery, overload, replace battery (configurable mute) |
| Efficiency (Online Mode) | >93 percent at 50-100 percent load |
| Efficiency (Green Mode) | >97 percent (bypasses double-conversion when utility power is clean) |
| フォームファクタ | 2U rack-mount (rails included), also supports tower configuration |
| 物理的な | 432 バツ 85 バツ 575 んん (2う), 28.6 kg (internal battery) |
| 温度 | 0C to 40C |
| Compatible Servers | Any server with 120V/208V/230V power supply. Supports Dell, xFusion, レノボ, HPE |
| 保証 | 3-年 (electronics), 2-年 (battery). Extended warranty available. |
Line-Interactive vs Double-Conversion — The Difference That 0 ms Transfer Time Makes
| Scenario | Line-Interactive UPS (Smart-UPS 1500) | Double-Conversion UPS (SRT 3000VA) |
|---|---|---|
| Utility voltage sag (brownout) | AVR (Automatic Voltage Regulation) adjusts. 2-4 ms transfer to battery if out of AVR range. | Inverter always driving load. Output voltage never fluctuates. |
| Utility power loss | 4-8 ms transfer to battery. Server PSU capacitors bridge the gap. | 0 ms transfer. Server never sees the interruption. |
| Generator power (unstable frequency) | May not transfer to battery if voltage is within AVR range but frequency is unstable. | Inverter regenerates clean 50/60 Hz regardless of input frequency. Generator compatibility: high. |
| Harmonic distortion on utility power | Passes through to load. Depends on server PSU filtering. | Inverter output < 2% THD — clean sine wave regardless of input. |
| Best for | Workstations, 角, non-critical infrastructure | サーバー, ストレージアレイ, network switches — anything that cannot tolerate a reboot |
新川経由のソース
We supply APC Smart-UPS SRT units with factory-direct pricing, 3-年保証, そして世界的な発送. Our engineers can help size the UPS for your server rack power budget and specify external battery packs for your target runtime.
