Following “Electric Heating and Electrical I”, “Electric Heating and Electrical II” is also not a standard generic device name or industry term. Combined with your consecutive inquiries about “large current generator” and “DC resistance tester”, this is most likely one of the following scenarios: 1. Most likely meaning: numbering of a series of courses, standards, or textbooks In vocational education, skill certification, or internal corporate training, electrical testing techniques are often divided into modules: 《Electric Heating and Electrical Technology (I): may cover basic theory, safety regulations, and use of simple instruments (e.g., multimeter, megohmmeter). 《Electric Heating and Electrical Technology (II): usually advances to high-voltage testing, high-current temperature rise testing, and complex equipment commissioning (e.g., the large current generator, DC resistance tester, and withstand voltage tester you asked about earlier). Speculation: If you saw this term in a learning or exam context, it likely refers to the training module for “intermediate/senior electrical test worker”, focusing on practical techniques for thermal effect testing using high current and precision resistance measurement. 2. Product series code from a specific manufacturer Some electrical test equipment manufacturers (especially those in Wuhan, Hubei and Baoding, Hebei) may use “Electric Heating and Electrical Type I” and “Electric Heating and Electrical Type II” to name their temperature rise test complete sets. “Electric Heating and Electrical I”: may refer to a single-phase or low-current (<1000A) basic temperature rise test system. “Electric Heating and Electrical II”: may refer to a three-phase, high-current (>2000A) advanced temperature rise test system with automatic temperature control and data acquisition. Features: three-phase balanced output, infrared temperature measurement linkage, automatic report generation, etc., specially used for type tests of large switchgear and busbars. 3. “Secondary circuit” related electric heating test (possible misinterpretation) Although less likely, if it refers to “secondary”, it may involve: Secondary circuit load test: measuring the DC resistance of the secondary winding of a current transformer (CT) (usually very small, micro-ohm level) to verify its load capacity. Heating and dehumidification device test: checking the linkage function of the “electric heating” (heater) and “electrical” (temperature and humidity controller) secondary circuit in the switchgear. Comprehensive inference: core content you may need Given that your previous two questions focused on high current and DC resistance, “Electric Heating and Electrical II” here most likely refers to an advanced version of temperature rise testing technology or a complete test system. If it refers to “advanced temperature rise test system” (corresponding to the advanced functions of “II”): Such systems typically include the following upgraded configurations, distinguishing them from basic equipment: Table Function Module Basic Version (may correspond to “I”) Advanced Version (may correspond to “II”) Current Source Single-phase, manual adjustment, air-cooled Three-phase independent/balanced output, program-controlled adjustment, water-cooled/forced air-cooled, up to 10kA+ Temperature Acquisition Handheld spot thermometer, manual recording Multi-channel temperature patrol instrument (16-64 channels), automatic thermocouple data acquisition, real-time curve plotting Resistance Measurement Manual DC resistance measurement after power off Online voltage drop method, real-time calculation of hot resistance without power interruption, automatic temperature rise conversion Control Mode Local button operation Industrial computer/tablet remote control, AI algorithm for thermal stability judgment, automatic generation of national standard report Application Scenarios Small switches, cable joints Type tests of large GIS, high-voltage switchgear, transformer busbars Suggested Action To provide you with the most accurate help, please confirm the source of the information: Source scenario: Did this term appear in a textbook table of contents, equipment nameplate, bidding document, or training outline? Specific need: Are you looking to purchase specific equipment, or do you want to understand related test methods/standards? If you can provide a little context (e.g., “I saw it in a textbook” or “the manufacturer recommended I buy this”), I can immediately pinpoint the exact meaning and provide detailed information. Blind guess recommendation: If you are building a professional temperature rise laboratory, “Electric Heating and Electrical II” may refer to a “three-phase high-current temperature rise automatic test system”, which is the mainstream configuration in power testing centers. Would you like me to introduce a typical solution for such a system?
