A dual-source load bank is a resistive AC load testing device with two independent power input channels (Source A and Source B) that are mechanically and electrically interlocked to prevent simultaneous closure. It is used to validate redundant power architectures, test ATS/STS transfer times, and simulate real-world IT loads during data center commissioning.

A single-source load bank has one power input and tests one circuit at a time. A dual-source load bank has two independent inputs with interlocked switching, enabling A-to-B failover testing, dual UPS redundancy validation, and ATS/STS transfer time measurement. A dual-source unit can also operate as single-source if only one channel is connected, making it versatile for sites that may upgrade to dual-feed architecture later.

A single MS-R-10.5kW-D unit with dual A+B channels is sufficient for basic dual-source failover testing. For larger facilities requiring higher total load capacity, multiple units can be paralleled, or a single MS-RL-42kW-D can provide higher density in a single rack. The exact number depends on total load capacity, redundancy architecture (N+1 or 2N), and commissioning timeline.

FAT (Factory Acceptance Test / Level 1 Red Tag) is conducted at the Batterlution factory before dispatch, verifying electrical and functional specifications at rated load. IST (Integrated System Testing / Level 5 White Tag) is conducted at the customer’s site, validating that the load bank integrates with the entire critical power infrastructure under simulated blackout and failover conditions.

Yes. The dual-source configuration directly supports NFPA 110 emergency power system acceptance testing by providing both normal power load (Source A) and emergency power load (Source B) with interlocked switching. All units are factory-tested to ISO 8528-5 standards with full FAT documentation.

Partial load transfer testing validates that a redundant power system can handle a load shift from one source to another without exceeding the remaining source’s capacity. For example, in a 2N UPS system, each UPS is rated for 100% of the load. A dual-source load bank can transfer 50% from UPS A to UPS B, validating that the system can operate at 150% of single-unit capacity during maintenance or failure.

Air-cooled dual-source load banks (MS-R series) use axial fans to dissipate heat and are suitable for standard data halls with adequate HVAC. They are lighter, simpler to install, and cost-effective for capacities up to 10.5 kW. Liquid-cooled dual-source load banks (MS-RL and MS-L series) use a closed-loop liquid cooling system connected to the facility’s CDU or external chiller. They are silent, enable higher power density (42 kW in a single rack, 500 kW in a standalone unit), and are essential for noise-sensitive or high-ambient-temperature environments.

Yes. Every Batterlution dual-source load bank is built to order. Standard configurations cover 400/230 VAC 50/60 Hz, but custom voltages include 480V, 690V, and 10.5 kV. Standard communication is Modbus RTU RS-485, with optional PROFINET, CANopen, or custom OEM protocols. Power ratings, form factors, connector types, and color (RAL) are all customizable.

Standard rack-mounted air-cooled units (MS-R-7kW-D, MS-R-10.5kW-D) are typically delivered in 6–8 weeks. Custom configurations require 8–12 weeks. Large liquid-cooled or containerized units (MS-L-500kW-D) may require 10–14 weeks. All lead times include factory testing and FAT documentation preparation.

Every unit includes: Factory Test Certificate (FAT / Level 1 Red Tag), Calibration Certificate (ISO 17025 accredited), Operation Manual, Data Sheet, and Commissioning Procedure Manual. Optional T&C Levels 2–5 commissioning support packages include Installation Verification Report (Yellow Tag), Start-up Certificate (Green Tag), Functional Test Report (Blue Tag), and Integrated System Test Report (White Tag / TCCF).