11kV Current Transformer RFQ Checklist
Engineering Intent
11kV CT inquiries should define system voltage, current ratio, insulation level, accuracy class, burden and switchgear installation details.
This article is written for engineers, EPC buyers and procurement teams who need to turn 11kV current transformer RFQ into a clear technical request instead of a vague product inquiry.
Key Selection Data
| Item | Data to Confirm |
|---|---|
| Check 1 | 11kV system voltage |
| Check 2 | Primary current ratio |
| Check 3 | Accuracy class and burden |
| Check 4 | Indoor switchgear type |
Standards and Evidence to Request
- IEC 61869
- Switchgear panel drawing
- Routine test report
For project approval, request a technical datasheet, outline drawing, wiring or terminal diagram where applicable, routine test report and nameplate information before shipment.
Common Specification Mistakes
- Only stating 11kV CT without ratio
- No burden or class
- No installation dimensions
RFQ Checklist
- State current ratio
- Confirm accuracy class
- Provide panel type
- Request drawing and datasheet
Related Product Paths
Ziyao Power can review the single-line diagram, load schedule, panel drawing or tender sheet and convert the requirement into a practical quotation package.
Download This Guide as PDF
Save this technical guide for offline reference. Includes all tables, specifications, and contact information.
Related Articles
Current Transformer Ratio Selection Guide
CT ratio should match feeder current, meter or relay input, accuracy requirement and future load margin.
CT Accuracy Class 0.5 vs 5P Explained
Metering CTs and protection CTs use different accuracy classes, so 0.5 and 5P should not be treated as interchangeable.
Current Transformer Burden Calculation
CT burden must include meter or relay load plus secondary cable resistance to maintain accuracy.