Direct answer: 20kV commonly refers to the nominal system voltage, while 24kV is the corresponding equipment rated-voltage class used for many medium-voltage projects. A 24kV RMU can be configured for a 20kV network when the full specification is technically compatible.
Key Points
- Confirm the highest system voltage, not only the nominal value
- Verify insulation level and short-circuit duty
- Review cable size, termination and compartment arrangement
- Confirm C, V, F, PT, metering and bus-section functions
Selection Guidance
24kV projects often have different insulation clearances, cable interfaces and panel dimensions from 12kV equipment. Never treat a 12kV and 24kV assembly as interchangeable without engineering review.
Information Required for Engineering Review
Provide the nominal voltage, highest system voltage, rated current, short-circuit level and duration, frequency, application, SLD, BOQ, protection requirements, cable details, installation conditions and quantity. Qiangchi will confirm the project-specific configuration and document requirements.
Engineering Documents and FAT
Available project support may include configuration review, technical clarification, GA drawing, typical SLD coordination, component schedule, routine-test documentation, FAT planning and export packing. Final scope is confirmed according to the approved specification.
Frequently Asked Questions
Can the final selection be made from the voltage and current alone?
No. The SLD, fault level, functional units, protection, cables and service conditions must also be reviewed.
Are all configurations the same size?
No. Dimensions depend on voltage class, functional units, cable arrangement and optional devices. Use the approved GA drawing.
Can Qiangchi review an EPC specification?
Yes. Send the SLD, BOQ and specification for a project-specific technical review.
What is checked during FAT?
The FAT scope may include visual and mechanical checks, wiring verification, interlock checks, functional tests and routine electrical tests according to the agreed inspection plan.
Which standards apply?
The applicable IEC or project standard is confirmed during technical clarification. Project-specific requirements must be stated before design approval.
Where can I compare related products?
Review QCL-24 GIS, selection guides or use the Medium Voltage Product Finder.
Send Your SLD for Review
Qiangchi will evaluate the voltage, rated current, fault level, functional units, drawings, testing and delivery documentation.
Confirm the Correct Voltage-Class Equipment
System voltage alone does not complete product selection. Confirm rated voltage, insulation level, rated current, short-circuit current and duration, frequency, functional units, cable arrangement, application and required standard before quotation.
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