EA-PS 10000 4U Series: 30 kW Programmable DC Power Supplies for Rack Test Systems and RFQs

Why a 30 kW 4U Programmable DC Supply Matters

In high-power industrial test environments, the power supply becomes a project-critical component. A mismatch in voltage range, AC input, output cabling, remote-control method, or cabinet airflow can delay commissioning even when the nominal wattage looks correct on paper. The EA-PS 10000 4U Series addresses this type of application with 30 kW rated output power in a 19 inch 4U rack format, covering low-voltage, high-current test points as well as high-voltage validation up to the 2000 V class.

For electrical engineers, the value is the ability to work with regulated voltage, current, power, and internal resistance modes. For system integrators, the value is the remote-control and interface flexibility needed to connect the supply to a PC, PLC, or automated test environment. For panel builders, the 4U mechanical format, rear DC terminals, airflow requirements, grounding, and optional water cooling must be planned before the cabinet is released. For procurement, the product must be quoted with the correct model, options, accessories, and documentation so that the supplier comparison is technically fair.

The series is especially relevant when a project has moved beyond early research and into BoFu evaluation: model selection, risk reduction, integration planning, purchasing approval, and supplier confirmation. TPS can help customers evaluate whether the EA-PS 10000 4U Series is the right fit or whether a related programmable DC power solution, cabinet build, cooling package, cable assembly, or equivalent configuration should be considered.

If your project also needs bidirectional source/sink behavior or regenerative energy handling, compare this unidirectional programmable DC supply requirement with TPS guidance on bidirectional power supply selection for US compliance. If the requirement is cabinet-level rather than single-instrument purchasing, TPS also supports industrial control cabinets for automation and broader power electronics integration.

Model Selection: Voltage, Current, and Power Range

The first selection step is to define the required DC operating envelope. Every model in the EA-PS 10000 4U Series is rated for 30 kW output power, but voltage and current ranges vary widely. Low-voltage models support very high current, while high-voltage models support lower current at the same power level. This is useful when one platform family must support multiple project types without changing the overall rack concept.

For accurate selection, calculate the maximum voltage, maximum current, and actual operating points at the same time. A 30 kW supply does not mean that maximum voltage and maximum current are always available simultaneously; the load profile should be checked against the model curve and power limit. It is also important to specify whether the application spends most of its duty cycle near full power, uses fast transitions, or requires stable operation at low voltage and low current.

The EA-PS 10000 4U platform includes remote sense compensation up to 5% of nominal voltage, which can be valuable when long DC cables or high current cause voltage drop at the load. However, remote sense must be designed carefully, especially in high-voltage installations and master-slave systems. If your fixture has long output leads, busbars, contactors, or a removable device-under-test tray, include cable length and terminal layout in the RFQ.

TPS can support early model screening for customers who provide the target voltage range, current profile, duty cycle, AC grid, control interface, and cabinet conditions. For projects that require a lower-power rack supply, compare related TPS content on 1U programmable DC supplies for rack test systems. For high-density programmable DC power in a different class, see the EA-PSI 10000 2U selection article.

Selection Questions to Resolve Before Quotation

• What is the required DC voltage and current operating window, including short-term peaks?
• Will the project run on 380-480 V three-phase AC, or does it need 208 V operation with derated output power?
• Is the unit used as a standalone instrument, or will it be integrated into a multi-unit rack system?
• Does the application require remote sense, USB logging, analog control, Ethernet control, or an optional industrial bus?
• Will the cabinet use forced-air cooling, external HVAC, or a water-cooled configuration?

Integration, Remote Control, and Automation Interfaces

For automated test and production systems, control architecture is often as important as output power. The EA-PS 10000 4U Series includes built-in galvanically isolated USB and Ethernet communication, a USB host port for data acquisition, and a galvanically isolated 15-pole analog interface. Optional plug-in modules can add industrial communication paths such as CAN, CANopen, RS232, ModBus TCP, ProfiNet, Profibus, EtherCAT, or Ethernet modules depending on the system architecture.

For a PC-controlled engineering bench, Ethernet or USB with SCPI or ModBus style command integration may be sufficient. For a PLC-controlled cabinet, analog setpoints and status outputs can simplify commissioning. For factory automation environments, optional industrial bus modules help align the power supply with existing controls infrastructure. In all cases, TPS recommends specifying who owns remote-control logic: the test software, PLC, safety relay layer, or a supervisory system.

Protection and monitoring should also be part of the integration plan. The supply supports configurable overvoltage protection, overcurrent protection, overpower protection, and overtemperature shutdown. Status and alarms can be monitored through the analog or digital interface, helping system integrators design predictable fault handling. For example, a production tester may require the DC output to remain off after a power fail event until the PLC confirms fixture status, while an engineering bench may prefer manual acknowledgement.

For projects that require multiple units, the series supports parallel operation using master-slave and Share bus connections. In a master-slave setup, the master unit can display and control summed system values, while the Share bus helps balance current sharing. This can scale the platform toward much higher total power, but it also increases the importance of cabling, bus termination, alarm strategy, and cabinet layout. TPS can help customers evaluate whether a single EA-PS 10000 4U unit is sufficient or whether a multi-unit system should be quoted as a configured rack solution.

Rack Installation, Cooling, AC Input, and DC Wiring

Mechanical and thermal planning can determine whether a high-power supply is easy to commission or difficult to service. The EA-PS 10000 4U Series uses a 19 inch 4U chassis, with enclosure depth around 668 mm and total depth requirements that can exceed the enclosure due to rear connectors, cable bend radius, and covers. Weight is approximately 50 kg for standard air-cooled models and approximately 56 kg with water cooling, so rails and cabinet structure must be designed accordingly.

Standard versions use forced front-to-rear airflow with temperature-controlled fans. This means cabinet doors, rear clearance, and airflow paths must be suitable for high-power operation. The manual recommends leaving sufficient space behind the equipment for ventilation in air-cooled installations. If the test bay is noise-sensitive or the cabinet has limited heat dissipation capacity, optional water cooling can reduce heat transfer into the surrounding environment and lower audible noise. Water cooling, however, requires active water flow, leak risk management, and dew-point control.

AC input should be confirmed before quotation. The series supports three-phase 380-480 V AC for full 30 kW output power. It can also operate on 208 V three-phase AC, relevant in US and Japan grid environments, but the available DC output power is derated to 18 kW. For procurement teams comparing suppliers, this detail is essential: a system that appears equivalent at 30 kW may not deliver 30 kW on the available facility grid.

DC wiring must be matched to current, cable length, temperature, and voltage rating. High-current models can require large conductors or multiple conductors per pole. High-voltage models require correct insulation, terminal covers, grounding decisions, and safe maintenance procedures. If the project includes custom busbars, cabinet wiring, or enclosure work, TPS can support related services such as custom sheet metal enclosures and cabinets, custom cable assemblies and wire harnesses, and liquid cold plate design for power electronics.

Cabinet Builder Checks

• Confirm 19 inch rack rails rated for the unit weight and installation depth.
• Reserve rear clearance for AC connector, DC terminals, touch protection, sense wiring, and cable bend radius.
• Define front-to-rear airflow or water-cooling architecture before cabinet release.
• Plan PE bonding, DC pole grounding strategy, and terminal covers according to the final voltage class.
• Document service access so the unit can be removed without damaging cables or busbars.

Compliance, Protection Functions, and Reliability Considerations

For B2B purchasing, compliance claims should be tied to the exact model and documentation package supplied for the project. The EA-PS 10000 4U documentation lists safety standards including EN 61010-1, IEC 61010-1, UL 61010-1, CSA C22.2 No. 61010-1, and BS EN 61010-1, along with EMC references including EN 55011 class B, CISPR 11 class B, FCC 47 CFR part 15B class B, and EN 61326-1 test references. When your RFQ requires formal certificates, test reports, declarations, or customer-specific compliance packages, request them directly through TPS during quotation.

Reliability in a high-power DC project is not only a component property; it is a system property. The supply includes adjustable OVP, OCP, and OPP thresholds, plus overtemperature protection. These functions should be configured based on the device under test, not left as generic defaults. For sensitive loads, electrical engineers should define safe voltage and current limits, expected load steps, alarm reaction, and restart behavior after power fail or overtemperature events.

Ripple, stability, and regulation should also be evaluated against the application. The series provides strong regulation specifications, but real-world performance depends on cable length, load dynamics, grounding, sense wiring, and fixture layout. For automated test cells, remote control monitoring and USB logging can help collect voltage, current, and power data during validation. For production environments, defined user profiles can reduce setup mistakes when operators switch between test programs.

TPS can also support projects where the power supply is only one part of the system. If your BoFu evaluation includes EMS, assembly, or build-to-print capability, review TPS resources on electronic manufacturing services for power electronics, mixed-technology PCB assembly, and build-to-print control panels. This helps connect product sourcing with integration and manufacturing support.

RFQ Checklist for Faster Supplier Evaluation

A strong RFQ reduces back-and-forth and helps TPS return a more useful recommendation. Instead of requesting "one 30 kW programmable DC power supply," provide the context that determines the correct model, accessories, and integration support. This is especially important when comparing suppliers because the lowest initial price may not include the required interface module, cooling option, DC terminal accessories, documentation, or cabinet work.

When you are ready to quote, send the RFQ to TPS with your preferred model or operating envelope. TPS can help confirm whether the EA-PS 10000 4U Series fits the application, whether an equivalent programmable DC power supply should be evaluated, and whether additional project services such as cabinet integration, wiring, cooling, or engineering consultation should be included.