最後更新: 2018-08-13



功能: AVR Boost


Automatic Voltage Regulation (AVR)

  • UPS - AVR Boost Enabled: The UPS is compensating for a low utility voltage.
  • UPS - AVR Trim Enabled: The UPS is compensating for a high utility voltage.

* Both the AVR Boost and AVR Trim are advisory. No user action is required.

Automatically steps up low voltage and steps down high voltage to levels that are suitable for your equipment.

Gives higher application availability by correcting low and high voltage conditions without using the battery


* The Smart-UPS will make a clicking sound when the UPS is enabling AVR Boost or AVR Trim.


* The Automatic Voltage Regulator (AVR) Trim LED comes on, indicating the UPS is compensating for a high voltage level.

* The AVR Boost LED comes on indicating the UPS is compensating for a low voltage condition.


Green Mode


Web UI

UPS Status
- System Status
   Device Status: On Line (Green Mode)

Green mode incorporates relays that bypass double conversion operations during normal steady state operation.

This bypass is feeding power directly from the utility feed enabling higher efficiencies greater that 97%.

Not only does this save on power utility costs but also on the cooling required in tight spaces as the unit emits less heat losses.

The lower heat also leads to longer life of key components such as batteries.  

If the quality of the power drops outside of configurable ranges, the UPS will immediately switch into On-Line mode. 

The switchover can take up to 10 ms.

Note that

the load is susceptible to surges during the switchover period. 

Customers must decide is the risk to their application is worth the 4% efficiency gain.


UPS Model


APC BACK-UPS CS BK350EI 350VA (HK$620@202006)

 * USB / Serial connection

 * Hot-swappable batteries

Battery Cartridge: RBC2 (HK$360)

  • Net Weight : 2.5 KG
  • Expected Battery Life : 3 - 5 years
  • 12 Volts, 12V 9.0Ah

APC BACK-UPS CS BK500EI 500VA(HK$780@2020-06)

 * USB / Serial connection

Battery Cartridge: RBC2 ($360)

APC BACK-UPS CS BK650AS 650VA (HK$880@2020-06)

 * 400W (650VA)

 * USB / Serial connection

Battery Cartridge: RBC17 (HK$ 390)

APC Power-Saving Back-UPS Pro 550 (HK$ 1230@2020-06)

Surge Protection X 3

Battery Backup X 3

Battery: APCRBC110 (Volt-Amp-Hour Capacity: 84) [$360@2020-06]

Customizable voltage sensitivity

voltage-transfer points depending on your power quality (high, medium or low sensitivity)

Customizable voltage-transfer points

Adjust the voltage points (widen or tighten the range)

APC BACK-UPS Pro 1200 BR1200GI Power-Saving 1200VA, 230V (HK$2980@2020-06)


  • SMC series (Battery: RBC6)     # 無插卡槽, 2 years factory warranty
  • SMT series (Battery: RBC7)     # 有 SmartSlot, 可以插 Network Management Cards, 3 years factory warranty


APC Smart-UPS SMC1500IC 1500VA LCD 230V with SmartConnect HK$3605 (黑)

APC Smart-UPS SMT1500IC 1500VA LCD 230V with SmartConnect $5480 (灰)

* SMT has a higher output power capacity at 1000 watts compared to only 900 watts for the SMC.

External Battery Pack

SUA1000XLI (Battery: RBC7)

SUA24XLBP (Battery: RBC11)

MAX: SUA1000XLI + 4 x SUA24XLBP    # 串聯


UPS Topology (Internal design of a UPS)



 - Standby / Offline                # most basic, Entry-level

 - Line Interactive                  # consumer electronics

 - Online / Double-conversion # critical applications)


Resorts to battery backup power in the event of common power problems such as a blackout, voltage sag, or voltage surge.

Line Interactive

allows it to correct minor power fluctuations (under-voltages and over voltages) without switching to battery

fluctuations: over-voltage


UPS provides consistent, clean, and near perfect power

fluctuations: ... voltage spike, frequency noise, frequency variation, or harmonic distortion.

Waveform type

Stepped approximation to a sinewave

Transfer Time

typical: 6ms

maximum: 10ms


Most Common Power Quality Problems


Voltage sag (or dip)

Description: A decrease of the normal voltage level

Causes: Connection of heavy loads and start-up of large motors.

Voltage fluctuation

Description: Oscillation of voltage value, amplitude

similar to the effects of an undervoltage.

Causes: undervoltages



Voltage Spike

Very fast variation of the voltage value (may reach thousands of volts)

Causes: disconnection of heavy loads

Voltage Swell

Description: Momentary increase of the voltage, at the power frequency

Voltage Surge

Surge 比 Swell 比時間



Description: high frequency signals on the waveform of the power-system frequency.

Causes: Electromagnetic interferences provoked by Hertzian waves such as microwaves

Short / Long interruptions

Harmonic distortion

Description: Voltage or current waveforms assume non-sinusoidal shape.

Voltage Unbalance

A voltage variation in a three-phase system

(phase-angle differences between them are not equal)






  • 14-day interval
  • Back-UPS is switched On

Self-Test (manual)

  • You can run a self-test by holding down the power button for 2 to 3 seconds.
  • By apctest

The yellow On Battery indicator lights while the Self-Test is being performed.


APC Smart Connect


Smart-UPS with embedded SmartConnect network port: DHCP

Smart Connect is for monitoring on the ups only using their monitoring service,
it doesn't support network shutdown afaik (you need a separate network card for it).
You'll need to use the usb



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