Protective Relay Signal Processing Board
High-speed PCB assembly for protective relays in power distribution systems of heading 8536, containing ADCs, DSP chips, and trip logic circuits. It analyzes fault currents and initiates protective actions. Classified in 8538.90.3000 as a part solely for heading 8536 apparatus.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If when assembled as complete automatic circuit breaker
Complete protective switching apparatus classifies in 8536 rather than as separate parts.
If primarily a multimeter or oscillograph function
Instruments principally for measurement rather than protection classify under heading 9030.
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Import Tips & Compliance
• Include IEEE C37.90 compliance testing and relay model compatibility data
• Specify current/voltage input ranges matching standard protective relay specifications
• Document that board requires relay enclosure and power supply to operate
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