UPS LOAD BANK TESTING

Load bank testing is the best way to validate and ensure the operational integrity of a mission critical power system, without using the critical load for testing. It is a process of measuring and verifying the performance of an Uninterruptible Power Supply (UPS) system, by introducing a resistive load to its output. This will allow the UPS system to be tested under different conditions and at various loads, providing reliable data for monitoring and diagnosis. The test can also be used to evaluate the capacity of the UPS system to deliver energy to the critical loads as well as verifying that the battery system will support the critical load for the required time.

LOAD BANK TESTING APPLICATIONS

SOLUTIONS

Uptronix can provide a complete load testing solution including load banks (1KW-2.5MW), cables and test technicians. Data collection and detailed reporting are included. Load Bank testing can be used to test UPS systems, UPS battery backup systems, batteries, generators and automatic transfer switches. Our technicians bring a wealth of experience in electrical engineering, testing and commissioning. With our experience in power system design, installation and testing services, Uptronix can provide a comprehensive solution for all your mission-critical load testing needs.

Load Testing Equipment

Uninterruptible Power Systems

Automatic Transfer switches (ATS)

Static Transfer Switches (STS)

Power Distribution Units (PDU)

Battery Run Time

Standby Engine Generators

Building Switchgear


Load bank testing is typically done by using an air-cooled resistive load bank, which contains high quality power resistors that can be used to simulate the actual electrical loads. The load bank will increase or decrease the resistance of each resistor in order to adjust the total power demand and thereby simulate different loading conditions. By doing so, the UPS system and supporting infrastructure can be tested under extreme and strenuous conditions to ensure that it will remain operational even in the most adverse circumstances.


Load bank testing is an optional service and is often utilized during commissioning of a new UPS system. DC load banks can be used to supplement battery maintenance and is an essential part of ensuring that the battery system will meet the required specifications. Load bank testing allows for the evaluation of the UPS system with respect to performance and capacity when subjected to realistic loads. Investing in a quality UPS load bank testing can help ensure that the system is tested to its fullest potential and is prepared for any possible emergency.  With proper testing, mission critical systems can be confident in their operational performance and be able to provide reliable power when it’s needed most.

Frequently Asked Questions about Load Bank Testing:

  • What are the requirements for load bank testing?

    A simple yearly load bank test can help ensure that the system can support the mission critical load. The load can be applied at different levels as required by the customer. Most standby generators are limited to 80% of capacity.

  • How often is load bank testing required?

    Testing frequency and specific requirements are typically provided by the customer or regulatory agencies that oversee life safety requirements (NFPA).


    According to NFPA110 standards, Load Bank testing is required at least every three years although it is highly recommended to do so every year for high-criticality loads. Additionally, testing should be conducted upon commissioning, after any significant changes or upgrades to the system, and prior to seasonal peaks in usage.  

  • Load bank testing an engine generator?

    Load bank testing of a generator can include both short-term and long-term load tests. Lightly loaded engine generators can experience “wet stacking” which is an accumulation of unburned fuel. Applying a rated load can help burn off the unburned fuel and ensure that the fuel and cooling systems are working correctly. Both tests can be performed with a load bank which can simulate the total demand of the generator, allowing it to be tested in realistic conditions.

    In some cases the site-specific test standards might require that the mission-critical power system be tested using the critical load, to ensure that it meets the criteria set forth by the mission-critical business teams. 
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