Incoming Inspection
Key components, MOV, relay, PCB and shell inspection before assembly.
QUALITY SYSTEM
Quality is designed before production.
Jidian builds trust through product definition, component selection, electrical testing, process control and market-specific confirmation.
Electrical Testing
Voltage threshold, delay restart, load and safety performance checks.
Process Control
Assembly SOP, sampling, functional test and packaging verification.
Market Confirmation
Voltage, plug, current rating and packaging language confirmed by market.
QUALITY GATES
Quality control starts with the approved requirement.
A functional test cannot compensate for the wrong market voltage, incorrect plug, unapproved component substitution or outdated packaging file.
| Gate | What is checked | Why it matters | Typical record |
|---|---|---|---|
| Requirement release | Voltage, thresholds, delay, current, plug, label and packaging | Prevents different departments working from different versions | Approved specification / sample record |
| Incoming material | Relay, MOV, capacitors, PCB, terminals, enclosure and printed items | Key components determine switching, surge and thermal behaviour | Incoming inspection and approved material reference |
| Process control | Assembly, soldering, wiring, fastening and visual checks | Reduces variation that a final on/off test may miss | SOP, in-process check and sampling record |
| Electrical validation | Trip/recovery values, response, delay, load and indication | Confirms the protection logic matches the approved version | Functional and parameter test record |
| Shipment release | Model, quantity, carton mark, manual, label and packaging | Prevents a correct product shipping with the wrong market information | Final inspection / packing verification |
Project-specific evidence: available records depend on the model, order and agreed validation plan. Buyers should request the exact report or sample confirmation they need rather than assuming every test applies to every product.
FIELD FEEDBACK
Returns should be classified, not only counted.
“Defective” is not a useful engineering category. The cause may be relay damage, overheating, an incorrect threshold, overload, plug mismatch or installation error.
Electrical: nuisance trip, no output, threshold error, surge component failure.
Thermal: terminal heating, relay contact wear, enclosure deformation.
Application: wrong load type, excessive inrush, wrong voltage or plug version.
Usability: unclear indicator, setting error, manual or packaging misunderstanding.
QUALITY GATES
Quality control starts with the approved requirement.
A functional test cannot compensate for the wrong market voltage, incorrect plug, unapproved component substitution or outdated packaging file.
| Gate | What is checked | Why it matters | Typical record |
|---|---|---|---|
| Requirement release | Voltage, thresholds, delay, current, plug, label and packaging | Prevents different departments working from different versions | Approved specification / sample record |
| Incoming material | Relay, MOV, capacitors, PCB, terminals, enclosure and printed items | Key components determine switching, surge and thermal behaviour | Incoming inspection and approved material reference |
| Process control | Assembly, soldering, wiring, fastening and visual checks | Reduces variation that a final on/off test may miss | SOP, in-process check and sampling record |
| Electrical validation | Trip/recovery values, response, delay, load and indication | Confirms the protection logic matches the approved version | Functional and parameter test record |
| Shipment release | Model, quantity, carton mark, manual, label and packaging | Prevents a correct product shipping with the wrong market information | Final inspection / packing verification |
Project-specific evidence: available records depend on the model, order and agreed validation plan. Buyers should request the exact report or sample confirmation they need rather than assuming every test applies to every product.
FIELD FEEDBACK
Returns should be classified, not only counted.
“Defective” is not a useful engineering category. The cause may be relay damage, overheating, an incorrect threshold, overload, plug mismatch or installation error.
Electrical: nuisance trip, no output, threshold error, surge component failure.
Thermal: terminal heating, relay contact wear, enclosure deformation.
Application: wrong load type, excessive inrush, wrong voltage or plug version.
Usability: unclear indicator, setting error, manual or packaging misunderstanding.