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คุณทดสอบความต้านทานการหมุนของหม้อแปลงไฟฟ้าอย่างไร
อ่านเพิ่มเติมⅠ: How do you test the winding resistance of a transformer? Transformer winding resistance measurements are obtained by passing a known DC current through the winding under test and measuring the voltage drop across each terminal (Ohm’s Law). Winding resistance in transformers will change due to shorted turns, loose connections, or deteriorating contacts in tap changers. Regardless of […]
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รู้จักเพิ่มเติมเกี่ยวกับเครื่องทดสอบความต้านทานการสัมผัส
อ่านเพิ่มเติมWhy You Need Contact Resistance Test? The contacts in the circuit breaker needs to checked periodically to ensure that the breaker is healthy and functional. Poorly maintained or damaged contacts can cause arcing, loosing phase, and even fire. This test is especially important for contacts that carry large amounts of current (e.g. switchgear busbars) because higher contact resistance can lead to […]