Vebko - Thailand

08/08/2026

การทดสอบ DC Winding Resistance ใน Transformer

Transformer เป็นโหลดแบบ Inductance เครื่องวัด Winding Resistance จะต้องจ่ายกระแสได้ต่อเนื่อง จนกระทั่งเกิด Saturated Magnetic Flux หรือ แกนเหล็กอิ่มตัว จึงจะอ่านค่า แรงดัน มาคำนวนค่า Winding Resistance

DC resistance measurement is a key diagnostic test for transformer windings, used to evaluate:
▪️Winding continuity
▪️Contact integrity
▪️Connection quality
▪️Early signs of deformation or overheating

⚡ What happens during the test?
When a DC current is injected into a transformer winding, the winding’s inductance causes a transient response. During this phase, the measured voltage (and calculated resistance) may fluctuate and should not be recorded.
📉 As the magnetic circuit saturates and the transient decays, the voltage stabilizes. Only at this steady-state condition does the measured DC resistance represent the true winding resistance.

🛠️ Why this matters:
▪️Recording values too early leads to incorrect resistance readings
▪️Comparing unstable values can mask real winding problems
▪️Accurate timing ensures repeatable and comparable results over time

🌠 With Vebko testing solutions, engineers can:
☑️ Control DC current injection precisely
☑️ Monitor transient and steady-state behavior clearly
☑️ Capture resistance values at the right moment
☑️ Perform reliable commissioning and maintenance tests
Because accurate diagnostics start with correct measurement principles.

Vebko, built for engineers who measure with understanding🖤

08/08/2026

โหลดรูปคลื่นจาก Relay หรือ จาก Fault Recorder ในรูปแบบ COMTRADE สามารถให้ VEBKO AMT205 สร้างสัญญาณตาม COMTRADE นั้นป้อนทดสอบ Relay ได้เลย

Power system disturbances are valuable sources of information. When a fault occurs on a transmission line, protection relays capture the event and store it as a COMTRADE record. But when it comes to testing and validation, engineers rarely need the entire disturbance file — they need the critical moment when the system behavior actually matters.

With AMPRO, you can import a recorded COMTRADE transient file directly into the AMT205 test set and focus only on the relevant part of the event. Simply load the file, select the desired time window, and the software automatically prepares that segment for precise injection.

This workflow allows protection engineers to replay real field events in a controlled test environment, making it easier to validate relay performance, investigate protection behavior, and reproduce critical scenarios with confidence.

Instead of replaying an entire disturbance record, you inject exactly the part you want to analyze — faster, cleaner, and far more efficient.

Real events. Precise selection. Reliable testing.

08/08/2026

VEBKO กับ Feature - Grid Simulation

การทดสอบ Relay โดยทั่วไป จะยิงกระแสและแรงดัยแบบค่าคงที่ แต่เริ่มมีการทดสอบ Relay แบบสัญญาณ Dynamic คล้ายกับลักษณะจริงของระบบ Power System

VEBKO มี Module Transient ที่ Simulate Fault และสร้างรูปคลื่นแบบ Dynamic และสั่งให้ VEBKO AMT105/205 ยิงสัญญาณออกไปยัง Relay ตามรูปคลื่นนั้นๆ

Testing a protection relay is one thing; simulating how it behaves during a complex network event is another. In AMPRO, we’ve moved beyond simple current and voltage injection to provide a comprehensive Network Modeling environment.

From a standard Single Line fault to complex scenarios like Unstable Power Swings or Three-terminal Parallel Lines, you can model the exact physics of your power system.

Engineers have granular control over every critical parameter:

✅ Time Domains: Pre-fault, Fault, and Post-fault durations.

✅ Fault Physics: Type, location, inception angle, and impedance.

✅ Network Topology: Line impedances, source/generator dynamics, and CB behavior.

✅ Signal Integrity: Detailed CT/PT modeling and precise measurement point selection.

Whether you are investigating a Double Fault or validating stability during a Stable Power Swing, AMPRO gives you the laboratory-grade precision needed to ensure your protection system is ready for the real world.

Stop guessing. Start simulating.

Send a message to learn more