Instrument Transformer Landing Page
11kV Current Transformer
11kV current transformer procurement page for medium-voltage feeder panels, metering cubicles and protection circuits.
Product Type
Current Transformer
Rated Current Ratio
11kV system class, commonly specified with 10/12kV CT equipment class and feeder current ratio
Installation
Indoor switchgear, panel or project-defined mounting
Standard
IEC 61869 series or tender-specified standard
Product Overview
Engineering Selection Context
11kV Current Transformer is specified for metering, protection and signal conversion in medium-voltage or low-voltage electrical systems.
The model name is only one part of the RFQ. Buyers should also define ratio, burden, accuracy class, insulation level, installation position, terminal arrangement and panel type.
Ziyao Power can support instrument transformer selection for KYN28, ring main unit, LV switchgear and project-specific metering or protection circuits.
Technical Specifications
Key Data Required Before Quotation
These values should be confirmed against the single-line diagram, tender document and site conditions.
| Rated Current | 11kV system class, commonly specified with 10/12kV CT equipment class and feeder current ratio |
|---|---|
| Frequency | 50Hz or 60Hz |
| Typical Model Family | LZZBJ9-10/12 for indoor epoxy cast-resin CT applications |
| Current Ratio Range | 5A to 3000A typical LZZBJ9 selection range; confirm with feeder schedule |
| Accuracy Class | 0.2S / 0.5 for metering, 10P for protection |
| Secondary Safety | Short CT secondary before removing meter or relay wiring |
| Accuracy Class | 0.2, 0.5, 5P, 10P or project-defined |
| Burden | Specified in VA according to relay, meter and cable load |
| Standard | IEC 61869 instrument transformer standard series; IEC 60044-1 / GB legacy references can be checked when tender requires them |
| Application | Metering, protection, feeder measurement and switchgear integration |
| Protection Level | Indoor epoxy resin insulation or cabinet-integrated protection by design |
| Installation Type | Indoor switchgear compartment, busbar, cable side or panel mounting |
| Model Focus | 11kV indoor current transformer for MV switchgear |
Construction & Materials
Build Details Buyers Should Confirm
Material decisions influence loss level, thermal behavior, footprint, maintenance and approval documents.
Epoxy resin insulation for indoor switchgear environments.
Precision magnetic core and winding design selected for metering or protection accuracy.
Clear secondary terminal marking for field wiring and commissioning.
Compact mounting geometry coordinated with switchgear compartment space.
Applications
Where This Page Fits
KYN28 and other medium-voltage switchgear metering and protection circuits.
Low-voltage switchgear feeders, capacitor panels and distribution boards where applicable.
Utility, industrial, commercial and renewable power distribution projects.
Retrofit projects where existing panel dimensions and wiring must be checked before order.
Standards & Compliance
Documents for Engineering Review
IEC 61869 instrument transformer series.
Routine electrical test and inspection before shipment.
Project drawings and terminal diagrams can be provided for engineering approval.
Accuracy class and burden must match the connected meter or relay loop.
FAQ
Procurement Questions
What information is required for 11kV Current Transformer quotation?
Provide current ratio, frequency, accuracy class, burden, insulation level, installation position, panel type, quantity and destination country.
How should accuracy class be selected?
Metering circuits usually require measuring accuracy, while protection circuits require protection class. The relay or meter datasheet should be checked before final selection.
Why does burden matter?
Burden represents the load connected to the secondary circuit. If it is not correctly specified, the transformer may fail to meet the required accuracy in actual service.
Can the unit be installed in existing switchgear?
Yes, but panel dimensions, busbar position, mounting holes and terminal access should be checked before quotation.
Is epoxy resin insulation suitable for indoor switchgear?
Yes. Epoxy resin insulation is widely used for indoor instrument transformers in medium-voltage switchgear.
Can secondary terminals be customized?
Terminal arrangement and marking can be reviewed according to the wiring diagram and panel layout.
What standards are normally referenced?
IEC 61869 series is commonly referenced for instrument transformers. Local grid or tender standards can also be reviewed.
Can Ziyao Power supply CT/VT with switchgear?
Yes. Instrument transformers can be supplied as separate components or coordinated with switchgear and distribution packages.
RFQ CTA
Send your specification for engineering review
Attach a transformer schedule, single-line diagram, switchgear drawing or load list. Our team will match the product configuration to voltage, capacity, installation and approval requirements.
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