The 3 Types of Uninterruptible power supply (UPS).

Uninterruptible Power Supply (UPS) in Kenya

Types of Uninterruptible power supply (UPS).

The main purpose is Uninterruptible Power Supply (UPS) is to provide Electronics with protection against voltage anomalies, Emergency Back-Up to enable shutdown of Equipment Correctly or Temporary Power and Protection as you switch from one Energy source to another.

In this article, we explore the fundamental differences in major Ups in Kenya market

There are three common types of Uninterruptible Power Supplies, UPS systems are available today in the market namely;

  • standby Uninterruptible Power Supplies UPS

  • Line Interactive Uninterruptible Power Supplies UPS

  • Online  Uninterruptible power supply  UPS System.


A standby Uninterruptible Power Supplies UPS

The standby UPS is designed to detect electrical failures, Spikes Faults and switch to steady reliable battery power automatically.

Standby UPS provides an uninterruptible power source that delivers short-term, battery-sourced power during outages.  Your Electronics receive utility power, under normal conditions, through a direct AC connection.

The standby UPS device can also safeguard data and sensitive equipment from surges, spikes, and dips Most Common application of Uninterruptible Power Supplies is to protect computers, modems, VoIP equipment, and other hardware.  This category of UPS is the least expensive of the three UPS types.

Line Interactive Uninterruptible Power Supplies UPS

Off-line UPS systems mean that the inverter and battery systems are offline to the Electronics Connected to the UPS. Electronics start using the UPS When there is no power.

The Connected Devices are fed directly from the raw mains during normal operation and not from the inverter output. Although the charger and battery remain connected to the mains to ensure the battery is always fully charged

If the mains Electrical voltage fails or exhibits voltage fails, or there is an overvoltage the Offline Line Interactive Uninterruptible Power Supplies UPS switch immediately connects the inverter output to Electronic.

The switching speed of the load is typically 2 to 10 millisecond in practice, however, most loads can ride through this period without any problems.

Why the Offline Line Interactive UPS is not popular

A more serious objection to offline systems is that the load is continuously exposed to spikes, transients and any other aberrations coming down the power line, creating a risk of loss or damage to sensitive equipment and data.

However, in many systems, this risk is mitigated, although not eliminated, by spike suppression and radio frequency filtering.

The advantages of offline UPS systems are that they are cheaper to purchase, and without the charger and inverter being permanently on load, they are more economical and energy-efficient.

Advantages of Offline Uninterruptible power supply (UPS).

  • Low cost
  • Silent operation when in standby
  • Efficient

Disadvantages of Offline Uninterruptible power supply (UPS).

  • Minimal power protection – only protects against a small percentage of problems
  • Poor output voltage regulation – sags and surges will be passed straight to the load
  • Break transfer to battery mode
  • No failsafe – UPS will drop the load if there is a high start-up current, overload or inverter failure

Online  Uninterruptible power supply  UPS System.

An On-line UPS is a type of uninterruptible power supply that utilizes either a double or delta conversion technology. In double conversion, network equipment receives AC Power from The AC outlet of The Inverter (UPS). From Ac Socket-to UPS conversion to DC- to AC Outlet of the Inverter These Ensure that the UPS Electronic Equipment receives continually clean power.

With delta conversion, a certain amount of power is sent to run computers, routers, and other equipment directly. This creates an energy-efficient online UPS system where some of the power skips the processing steps. The online UPS system maintains consistent current flow for the protection of network equipment. When there is a power outage, fluctuation or failure, the rectifier within the UPS is automatically bypassed, and power is sourced from the battery until restoration occurs.

Advantages of on-line UPS systems

  • Continuous & total power conditioning
  • Failsafe/overload protection with static bypass facility
  • No break on mains failure
  • Wide input voltage tolerance
  • Recommended with Generator sets

Disadvantages of on-line UPS systems

  • More expensive than other types of UPS technology

Sensitive equipment can be protected with double-conversion UPS technology. On-line UPS units are available for a wide range of users. With double-conversion UPS processes, network servers, data centers, and a full scope of environments can be protected, and there is no transfer time in the transition to battery power.

Intelligent on-line UPS systems are available to support demanding loads and run times. More affordable double-conversion UPS units are available to smaller offices. Normally, the larger the unit, the longer equipment can be kept running.


The top Ups Brands Common in the Kenyan Market are; APC, Mecer, Mercury and Office Point 

The Most Popular UPS that server as Surge Protectors Are;

You can buy Power Back-Up Batteries and UPS Online in Kenya from Our Store and Have Them Delivered or Pick them from our UPS store Along Kimathi Street in Nairobi Kenya.

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