Voltage, Current, Power Control & Load Test Equipment
ED&D electrical test equipment supports repeatable power measurement, load simulation, input voltage adjustment, fault-condition test setups, and select high-voltage inspection workflows used in electrical safety laboratories, engineering departments, industrial test environments, and production support applications. This product group includes the 2105 Digital Wattmeter, Series RLB-40 Resistive Load Banks, Series Variac Variable Transformers, Series PSO Power Supply with Ohmic & Inductive Load, KS Knife Switches, and the BD-50E ED&D Spark Tester.
Voltage and Power Measurement
The 2105 digital wattmeter supports bench-top electrical measurement with true RMS voltage and current indication and true power measurement.
Load Simulation and Power Control
Resistive load banks, variable transformers, and PSO systems help laboratories apply controlled electrical loads, adjustable input voltage, and ohmic or inductive load conditions during product evaluation.
Fault Setup and HV Inspection
KS knife switches support manual fault-condition arrangements, while the BD-50E spark tester supports high-voltage inspection of coatings and tank linings.
Tell us whether you need power measurement, variable voltage control, resistive or inductive loading, switching support, or high-voltage inspection so we can help match the right equipment.
Electrical Test Equipment for Power Measurement, Voltage Control, Load Testing, and Related HV Inspection
Electrical test laboratories often need more than one type of bench or floor-standing instrument to evaluate a product safely and repeatably. In practice, test programs may require power measurement, adjustable input voltage, controlled resistive or inductive loading, fault-condition switching, and in some industrial cases, high-voltage coating inspection.
ED&Dās voltage, current, power control, and load test equipment group brings together several support tools used in those workflows. The 2105 Digital Wattmeter is positioned for bench-top power analysis, the Series RLB-40 Resistive Load Banks provide controlled resistive loading, the Series Variac Variable Transformers allow adjustable input voltage, the Series PSO Power Supply with Ohmic & Inductive Load supports structured power-source and load arrangements, the KS Knife Switches support open-circuit and short-circuit fault setups, and the BD-50E Spark Tester supports high-voltage inspection of tank linings and similar coatings.
Many of these products support workflows associated with IEC 60601, IEC 61010, IEC 60335, IEC 60950, IEC 60884, EN 60950, and CSA 950. Some are legacy standards references that remain relevant for older products, historical compliance programs, and existing laboratory procedures. The BD-50E, by contrast, is better understood as industrial inspection equipment rather than a core standards-driven electrical safety lab instrument.
Important standards note: this equipment is typically used to perform measurements or create test arrangements required by a standard or internal procedure. Final suitability depends on the specific clause, product category, DUT ratings, inspection method, and laboratory procedure.
Key Equipment Types in This Product Group
- Bench-top digital power and watt measurement instruments
- Portable resistive load banks for controlled electrical loading
- Variable transformers for input voltage adjustment
- Power-source systems with ohmic and inductive load units
- Knife switches for open-circuit and short-circuit component fault testing
- High-voltage inspection tools for coatings, linings, and related industrial surfaces
2105 Digital Wattmeter
The 2105 Digital Wattmeter is a single-phase digital power analyzer intended for bench-top voltage, current, and true power measurement in product safety and engineering test environments. It is positioned as a wide-range instrument with true RMS voltage and current, true power measurement, and a DC to 50 kHz frequency response.
Product Details
- Single-phase wide-range digital power analyzer
- Twin high-resolution 4½-digit displays
- DC to 50 kHz frequency response
- True power measurement
- True RMS voltage and current measurement
- Built-in peak overload indicators
- Voltage ranges: 600, 300, 150, and 30 V
- Current ranges: 20 A, 2 A, and 200 mA
Typical standards references: IEC 60335, IEC 60950, CSA 950, and EN 60950.
Typical fit: bench-top electrical measurement in product safety laboratories, engineering development, and university motor or electrical test labs where wide-range single-phase power analysis is needed.
Legacy standards note: IEC 60950, EN 60950, and CSA 950 are older standards references, but they remain relevant in legacy product and existing lab-method contexts.
Series RLB-40 Resistive Load Banks
The Series RLB-40 Resistive Load Banks are portable resistive load test stations intended to provide a controlled electrical load without the complexity and exposure risks of improvised bench wiring. They are positioned for laboratory and engineering environments that need structured, repeatable resistive loading with integrated cooling and mobility.
Product Details
- Portable test station format on casters
- Built-in cooling fans
- Self-contained unit design reduces exposed wiring compared with improvised test rigs
- Fine-tuning mechanism for more precise load adjustment
- Designed to reduce setup complexity in load-testing workflows
Typical applications: controlled resistive loading during product development, power evaluation, electrical test setup verification, and bench or floor-standing engineering test programs.
Use note: load bank selection should be matched to the required voltage, current, power dissipation, duty cycle, and cooling requirements of the specific test program.
Series Variac Variable Transformers
The Series Variac Variable Transformers provide adjustable input voltage for test setups where fixed line voltage is not suitable. They are a lower-cost alternative to more complex power sources when frequency adjustment is not required.
Product Details
- Variable AC output for adjustable input-voltage testing
- Useful where frequency adjustment is not required
- Lower-cost alternative to full power-source systems in many bench setups
- Output is fused
- Single-phase standard models available
- Special units available for broader voltage and frequency needs
Available configurations: standard models include input voltages from 120 VAC to 480 VAC. Special units are available for frequencies to 2000 Hz and voltages to 1000 VAC.
Technical note: a variable transformer adjusts voltage magnitude, but it does not replace a programmable AC power source when frequency control, waveform control, or advanced source programming is required.
Example Standard Models
| Model | Input VAC | Output VAC | Amps | Hertz |
|---|---|---|---|---|
| 3PN501 | 120V | 0-140V | 5A | 50/60 Hz |
| 3PN1010 | 120V | 0-140V | 10A | 50/60 Hz |
| 3PN2210 | 120V | 0-140V | 22A | 50/60 Hz |
| 3PN1220 | 240V | 0-280V | 5A | 50/60 Hz |
| 3PN1520 | 240V | 0-280V | 9.5A | 50/60 Hz |
Series PSO Power Supply with Ohmic & Inductive Load
The Series PSO Power Supply with Ohmic & Inductive Load is intended for electrical test programs that require a structured combination of power source, ohmic loading, and inductive loading rather than a simple resistive bench setup. It is positioned for laboratories performing standards-driven switching, load, and related electrical evaluations.
Product Details
- Power Source Unit
- Ohmic Load Unit
- Inductive Load Unit
- Three separate units forming one test arrangement
- Available in single-phase and three-phase configurations
- Models available for multiple uninterrupted-duty current levels up to 275 V
- Offered with autotransformer or separate-winding transformer configurations
Typical fit: switching and load-related test workflows where both ohmic and inductive conditions must be applied in a controlled, repeatable setup.
Transformer options: available as models using autotransformers or separate windings, depending on the required configuration.
Selection note: choose the PSO configuration based on phase count, uninterrupted-duty current, transformer style, physical layout, and the exact lab method being performed.
Example PSO Model Configurations
| Phases | Nominal Amperage, Uninterrupted Duty at up to 275 V | Approx. Dimensions (W x D, mm) | Autotransformer Model | Separate Winding Model |
|---|---|---|---|---|
| 1 | 20 A | 620 x 850 | PSO-313 | PSO-323 |
| 1 | 50 A | 620 x 850 | PSO-315 | PSO-325 |
| 1 | 125 A | 620 x 850 | PSO-317 | PSO-327 |
| 3 | 20 A | 1760 x 850 | PSO-333 | PSO-343 |
| 3 | 50 A | 3 x 620 x 850 | PSO-335 | PSO-345 |
| 3 | 125 A | 3 x 620 x 850 | PSO-337 | PSO-347 |
KS Knife Switches
The KS Knife Switches are manual switching devices intended for open-circuit and short-circuit component fault testing in standards-driven safety programs. Multiple throw and pole-count options make them useful for configurable fault-condition test setups.
Product Details
- Available in single-throw, fusible single-throw, and double-throw types
- Available with 1, 2, 3, or 4 poles
- Used for open-circuit and short-circuit component fault testing
- Corrosion-resistant contacts
- Insulating base construction
- 30 A rated
Typical standards references: IEC 60601, IEC 60950, IEC 61010, and EN 60950.
Typical configuration options: single-throw model numbers A-10S, A-11S, A-12S, and A-13S; double-throw model numbers A-14D, A-15D, A-16D, and A-17D.
Selection note: verify pole count, throw type, fault arrangement, and current rating against the exact clause or lab method before choosing a switch configuration.
Knife Switch Model Reference
| Poles | Single Throw Model No. | Double Throw Model No. |
|---|---|---|
| 1 | A-10S | A-14D |
| 2 | A-11S | A-15D |
| 3 | A-12S | A-16D |
| 4 | A-13S | A-17D |
BD-50E ED&D Spark Tester
The BD-50E ED&D Spark Tester is a rugged high-voltage inspection tool used to check coating quality in applications such as tank lining inspection. It is positioned for industrial environments where reliable continuous use is important.
Product Details
- Used to check the quality of a weld-related coating or lining application
- Designed for inspection of tank linings and similar industrial surfaces
- Rugged construction for continuous-use environments
- High-voltage transformer isolates the unit from line power
- Transformer isolation helps the unit run cooler during operation
Typical fit: industrial coating, lining, and surface inspection workflows where a spark tester is used to identify discontinuities or defects.
Positioning note: the BD-50E is best understood as high-voltage industrial inspection equipment. It is not the same thing as a dielectric withstand tester, leakage tester, or standards-driven load-test instrument.
Which Electrical Test Instrument Is Right for Your Lab?
| Product | Primary Use | Best Fit | Key Differentiator |
|---|---|---|---|
| 2105 Digital Wattmeter | Power measurement | Bench-top single-phase electrical measurement | True RMS voltage/current, true power, DC to 50 kHz response |
| Series RLB-40 Resistive Load Banks | Controlled electrical loading | Engineering labs and test stations needing resistive load application | Portable self-contained load station with cooling fans and fine adjustment |
| Series Variac Variable Transformers | Voltage adjustment | Input-voltage variation where frequency control is not required | Simple adjustable AC voltage solution with standard model options |
| Series PSO Power Supply with Ohmic & Inductive Load | Power source and load simulation | Switching and load-related workflows requiring ohmic and inductive conditions | Three-unit arrangement with power source, ohmic load, and inductive load sections |
| KS Knife Switches | Fault-condition switching | Open-circuit and short-circuit component fault testing | Multiple throw and pole-count options, 30 A rated |
| BD-50E ED&D Spark Tester | High-voltage inspection | Tank lining and coating inspection applications | Rugged continuous-use design with isolated high-voltage transformer |
Selection guidance: choose the 2105 for bench-top power measurement, the RLB-40 for controlled resistive loading, the Series Variac for adjustable input voltage, the Series PSO for structured ohmic and inductive load arrangements, the KS Knife Switches for manual fault-condition switching, and the BD-50E for industrial spark-inspection work.
Frequently Asked Questions
What does the 2105 digital wattmeter measure?
The 2105 is positioned for single-phase electrical measurement, including true RMS voltage, true RMS current, and true power, with a frequency-response specification of DC to 50 kHz.
What is a resistive load bank used for?
A resistive load bank is used to apply a controlled electrical load during engineering, product evaluation, and electrical test workflows where the DUT or source must be exercised under load.
When should a lab use a variac instead of a programmable AC power source?
A variac is a good fit when the main need is adjustable AC voltage and frequency control is not required. For advanced source programming, waveform shaping, or frequency variation, a programmable power source is usually the better choice.
What is the Series PSO used for?
The Series PSO is used where a lab needs a structured arrangement that combines a power source with ohmic and inductive load units for switching and load-related electrical testing.
What are knife switches used for in a safety lab?
Knife switches are commonly used for open-circuit and short-circuit component fault testing, where a manual switching arrangement is needed as part of the lab setup.
What is the BD-50E spark tester used for?
The BD-50E is used for high-voltage inspection of tank linings and similar coated surfaces where a rugged spark tester is needed for continuous-use industrial work.
Are IEC 60950 and EN 60950 still relevant?
Yes, as legacy references. They remain relevant for older products, historical compliance files, and laboratory methods that still reference those standards.
Does this equipment itself certify compliance with IEC or UL standards?
No. This equipment supports measurements or test arrangements used in standards-based programs. Final compliance depends on the full test method, DUT, and applicable standard requirements.
Tell us whether you need watt measurement, adjustable voltage, resistive or inductive loading, fault-condition setup, or high-voltage inspection support.
Typical Voltage, Current, Power Control, and Load Test Applications
ED&D electrical test equipment in this category is used across electrical safety laboratories, engineering labs, product development programs, production-support environments, and selected industrial inspection workflows where electrical measurement, voltage adjustment, load application, switching, or coating-inspection capability is required.
Depending on the product and governing program, these workflows may relate to requirements or procedures associated with IEC 60601, IEC 61010, IEC 60335, IEC 60950, IEC 60884, EN 60950, and CSA 950. The spark tester is more directly tied to industrial inspection use than to mainstream product safety lab standards work.
- Bench-top power measurement in product safety labs
- Single-phase voltage and current measurement
- Engineering and university electrical test workflows
- Controlled resistive load application
- Adjustable input-voltage testing using variable transformers
- Ohmic and inductive load simulation using PSO systems
- Open-circuit component fault testing
- Short-circuit fault-condition switching
- Tank lining and coating inspection with spark testing equipment
Selection note: choose equipment based on whether your primary need is measurement, voltage control, resistive or inductive load application, manual fault switching, or industrial high-voltage inspection, then verify the ratings and setup details against the exact lab method or inspection procedure.