LZZBJ9-10C1 Epoxy Resin Cast Current Transformer

Indoor 10kV Measuring and Protection CT for Switchgear Panels

The LZZBJ9-10C1 current transformer is a 10kV epoxy-resin cast indoor CT, designed for accurate current measurement, relay protection, and energy metering in medium voltage switchgear. It features a fully enclosed design with anti-tracking epoxy insulation, ensuring reliable performance in compact switchgear cubicles and harsh indoor environments.

This CT is widely installed in KYN28-12, XGN series, and other metal-enclosed MV panels, making it a trusted solution for substations, industrial facilities, and utility grids.

🔧 Key Features

Rated Voltage: 10kV
Rated Primary Current: 5A to 1000A
Accuracy Classes: 0.2, 0.5, 5P, 10P, or customized
Construction: Fully resin-cast (anti-humidity and partial discharge-resistant)
Mounting: Vertical baseplate or panel-integrated
Standard Compliance: IEC 61869-2 / GB 20840.2

🌍 Application Scenarios

MV switchgear current measurement and protection
Incoming/outgoing feeder monitoring in 6kV–10kV systems
Energy metering CTs for power utilities
Differential relay protection for transformers and motors
Used in KYN28A, HXGN, GCK, and other air-insulated switchgear

Its low partial discharge and high thermal stability make it ideal for high-density installations and critical load centers.

📊 Technical Specifications

Parameter	Value
Rated Voltage	10kV
Rated Frequency	50Hz / 60Hz
Rated Primary Current	5A to 1000A
Rated Secondary Current	1A or 5A
Thermal Short-Circuit Current	Up to 40kA / 1s
Dynamic Current Withstand	Up to 100kA peak
Accuracy Class	0.2 / 0.5 / 5P / 10P
Insulation Level	12 / 42 / 75 kV
Partial Discharge	<10pC @ 1.2×Un
Operating Temperature Range	–25°C to +55°C

🧱 Design Advantages

Solid epoxy casting provides full moisture resistance and a compact structure
Multiple core configurations for simultaneous metering and protection
High dynamic withstand for short-circuit protection applications
Flame-retardant and anti-tracking housing meets IEC safety codes
Panel-mountable with embedded screw holes or side brackets
Long service life with no maintenance required

❓ Frequently Asked Questions

• Can I use LZZBJ9-10C1 for both protection and metering?
Yes. It supports a dual-core design for accurate metering and fast protection triggering.

• What switchgear models is this CT compatible with?
It fits most 10kV air-insulated switchgear panels such as KYN28, XGN, HXGN, and GCS.

• Is customization available for current ratios or burden?
Absolutely. We can provide any CT ratio (e.g., 300/5, 600/1) and accuracy class upon request.

• What is the typical installation method?
Panel base mounting with two screws or bottom bracket depending on panel layout.

• Does it require periodic calibration?
No. It’s maintenance-free, but periodic secondary testing is advised per IEC standards.