Product Introduction

The MOEORW-WBH50 is an integrated, high-precision transformer capacity, load, and no-load loss tester designed for 10kV-class distribution assets. This turnkey mobile system combines a 50kVA / 1200V / 30A SPWM variable-frequency power source (45Hz–300Hz) with a Class 0.2/0.5 power analyzer, delivering 0.2% measurement accuracy for core losses (P_O)and short-circuit impedance(U_K)without external voltage regulators.

Product Parameter (specification)

Output voltage	1200V.
√ Includes overcurrent protection for transformer no-load and load characteristics.
√ Features a four-wheel mobile structure for portability.
√ Voltage regulator must be embedded within the test bench structure for aesthetic purposes.
2 Transformer Power Analyzer, supporting single-phase and three-phase measurements, with the following performance specifications
√ Voltage measurement range	10V–1200V; current measurement range;0.1A–30A; accuracy;Class 0.2;
√ Power (U*I)	accuracy;Class 0.5;
√ Power factor	0.1–1.000; accuracy;Class 0.3;
√ Frequency	40–70Hz; accuracy;Class 0.1;
√ Total three-phase power P; √ No-load current I.%; √ No-load loss P_O; √ Load loss P_K; √ Impedance voltage U_K; √ Three-phase power values Pa(Pab), Pb, Pc(Pbc); √ Three-phase average line voltage Un; √ Three-phase average current In.

Core Functions

1. Power Analyzer Module : Class 0.2/0.5 precision analyzer measuring 10V–1200V / 0.1A–30A to automatically compute capacity, (P_O), (P_K), U_K), and up to 31st harmonics.

2. SPWM Variable Frequency Supply : A 50kVA pure sine-wave inverter (THD ≤ 2%) delivering 1V–1200V line voltage at 45–300Hz, completely replacing bulky external voltage regulators.

3. Central Controls & Safety Bench : An IP20 four-wheel mobile cabinet featuring an interactive LCD screen, real-time Modbus-TCP Ethernet telemetry, and instant 480V/20A dual-stage overcurrent protection.

4. Compensation Capacitor Array : An integrated capacitor bank engineered to supply reactive power compensation for distribution transformers, ensuring low-load testing stability up to 50A.

Key Features & Advantages

1. High-Precision Power Analyzer Module

Data Support: 10V–1200V Voltage / 0.1A–60A Current measurement ranges with Class 0.2 accuracy; Power measurement at Class 0.5; Power Factor 0.1–1.000 at Class 0.3.

Core Capability: Features synchronous 3-phase parallel sampling and 31st-order harmonic analysis. Automatically corrects data to 75°C standard temperature, guaranteeing strict IEC 60076 and GB/T 6451 no-load loss test compliance.

2. Built-in 50kVA Variable Frequency Supply

Data Support: Input: 3-phase 380V ±10%. Output: Line voltage 1V–1200V / continuously adjustable frequency 45Hz–300Hz. Load regulation ≤±0.5% FS with THD ≤ 2%.

Core Capability: Powered by high-power IGBT/IPM modules with SPWM hardware synthesis. Acts as a standalone test station to simulate multi-country power grids and perform low-voltage short-circuit impedance tests without external regulators.

3. Automated Capacity & Nameplate Fraud Verification

Data Support: Integrates an active GB/T 6451 and IEC 60076 standard database for real-time benchmark mapping.

Core Capability: Serves as a dedicated tester to identify transformer nameplate capacity fraud. Automatically computes measured no-load loss (P_O) and short-circuit impedance(U_K)to flag discrepancies and output pass/fail indicators instantly.

4. Ruggedized Field-Ready Mobile Workspace

Data Support: Heavy-duty industrial 4-wheel mobile cabinet (800×1000×1330mm) with IP20 ingress protection.

Core Capability: Turnkey portable open-circuit test equipment. High-brightness sun-readable LCD display paired with an integrated thermal printer for immediate, on-the-spot test documentation without external CT/PT units.

5. Multi-Stage Intelligent Safety & Connectivity

Data Support: Independent input/output circuit breakers with custom dual-stage 480.0V voltage / 20.0A current safety thresholds.

Core Capability: 10-second soft-start delay with instant audio-visual alarms for overload, overcurrent, and overtemperature. Equipped with an RJ45 Ethernet port supporting Modbus-TCP protocol for remote automation, alongside USB data export.

Prodection details

Transformer Manufacturing Plants: Streamlines Factory Acceptance Testing (FAT) and IEC 60076 standard verification right on the assembly line.

Electric Utilities & Research Institutes: Field-ready tool for on-site commissioning, routine open-circuit inspection, and preventive maintenance.

Heavy Industrial Facilities: Ideal for in-house transformer diagnostics in steel mills, chemical complexes, and railway power networks.

Third-Party Testing Laboratories: Certified standalone workstation for independent energy efficiency audit and product certification.

Transformer Exporters & Custom OEMs: Full variable frequency (45Hz-300Hz) simulation to validate compliance with global IEC/ANSI standards.

Single-Unit & Field Operators: Turnkey execution with zero external CT/PT units required, featuring a dual-stage 480V/20A safety loop, high-brightness LCD, and an integrated thermal printer.

More About Us

Manufacturing Capability & Quality Assurance

1. Production Line Commitment

Automated SMT Assembly: Premium core control boards manufactured via fully automated SMT line to eliminate manual errors and ensure 100% batch consistency.

48-Hour Full-Load Burn-In: Every 50kVA power module undergoes a strict 48-hour continuous burn-in test under maximum load before final assembly.

Traceable Factory Calibration: Calibrated against standard transformers with individual, serialization-matched test reports fully traceable to national metrology standards.

2. OEM/ODM Customization Services

Custom Brand Interface: Tailored front panel branding, custom logo integration, and multi-language system interface modification.

Flexible Software Configuration: Built-in option for custom test sequencing, automated report formatting, and proprietary Modbus-TCP/Ethernet protocol customization.

Scalable Volume Manufacturing: Full OEM/ODM engineering solutions available for multinational transformer brands and regional distributors.

3. Warranty & Lifecycle Support

1-Year Comprehensive Warranty: Full 12-month standard warranty on the complete unit, including the Class 0.2/0.5 power analyzer.

Critical Spare Parts Stock: Immediate off-the-shelf deployment for critical parts including high-power IGBT/IPM modules and mainboards to eliminate client downtime.

Lifetime Technical Support: Continuous access to expert sales engineering assistance, routine calibration guidelines, and remote firmware updates.

FAQ

Q1: Can this 50kVA device test transformers with larger capacities?

Answer: Yes, under reduced voltage. While it directly tests standard 10kV distribution transformers up to 1200V / 30A without accessories, you can extend the capacity range to test larger assets by configuring external, step-up Current Transformers (CT) and Potential Transformers (PT).

Q2: Why is the built-in SPWM variable frequency supply better than traditional regulators?

Answer: High stability and multi-grid simulation. Powered by high-power IGBT/IPM modules, it delivers pure sine-wave excitation (THD ≤ 2%, 45Hz–300Hz), allowing you to simulate international power grid frequencies (50Hz/60Hz) for export validation and block onsite voltage fluctuations.

Q3: Does the 31st-order harmonic analysis help detect nameplate capacity fraud?

Answer: Yes, by isolating true fundamental core loss metrics. High-order harmonics cause severe waveform distortion during transformer open-circuit testing. The built-in 31st-order harmonic analysis separates fundamental wave data from harmonic distortions, ensuring measured No-Load Loss(P_O)and Impedance Voltage(U_K)perfectly map against IEC 60076 / GB/T 6451 benchmarks to flag rating fraud instantly.

Q4: What type of hardware protection triggers during an overcurrent event?

Answer: Dual-stage automated shutdown. The central control bench utilizes instant hardware wave-monitoring preset at safety thresholds (480.0V / 20.0A), triggering an audio-visual alarm and isolating the circuit breakers within milliseconds to safeguard the test object.

Q5: Can the test data be automatically uploaded to our factory automation network?

Answer: Yes, via integrated telemetry. The system is equipped with an industrial RJ45 Ethernet port supporting the Modbus-TCP protocol, allowing real-time data streaming and automated testing report export directly to your factory MES or SCADA system.

🌐 Ready to Eliminate Transformer Rating Fraud & Optimize Your FAT Workflow?

Get Instant Engineering Support: Click [ Request a Quote ] to consult our sales engineering team for tailored DN50/DN80 adapters, custom test sequences, and Modbus-TCP telemetry setups.

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