LZZBJ9-12 Indoor Epoxy Resin Current Transformer

Name: LZZBJ9-12 Indoor Epoxy Resin Current Transformer - Thomas Electric
Brand: Thomas Electric
SKU: Lzzbj9-12

LZZBJ9-12 Indoor Epoxy Resin Current Transformer is a fully enclosed epoxy resin cast pillar-type current transformer designed for indoor power systems up to 10kV and 50Hz/60Hz. It is ideal for current measurement, energy metering, and relay protection, particularly in compact spaces like ring-net or switchgear cabinets. Durable and resistant to pollution and humidity, it ensures […]

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LZZBJ9-12 Current Transformer Type designation

LZZBJ9-12 Current Transformers, LZZBJ9-12 type CT

The LZZBJ9-12 current transformer type designation provides a clear breakdown of its structure, voltage grade (12kV), design sequence, protection features, and insulation type, enabling technicians to quickly interpret and configure the model for precise application needs.

LZZBJ9-12 Current Transformer Service conditon

Altitude: Up to 1000m
Ambient Temperature: Ranges from -5°C to +40°C
Relative Humidity: Maximum 90% at 20°C
Environment: Free from harmful gases, chemicals, and pollutants that could affect insulation performance.
Vibration: Stable operation with no chattering or impacts.

The LZZBJ9-12 current transformer features a fully enclosed epoxy resin cast pillar structure, designed to withstand varying climatic and altitude conditions. It is resistant to pollution and humidity, ensuring reliable operation under specified indoor conditions. Proper installation as per the given parameters guarantees stable, safe, and long-lasting performance.

LZZBJ9-12 Current Transformer Construction

The LZZBJ9-12 is a leg-type, fully enclosed current transformer with a durable ring core and cast resin insulation for its primary and secondary windings. This design ensures dependable performance in medium-voltage systems up to 10kV, even in environments with high humidity and pollution level II.

Outlet Markings:

Primary Terminals: P1, P2
Secondary Terminals (Group 1): 1S1, 1S2
Secondary Terminals (Group 2): 2S1, 2S2

Operational Guidelines:

The primary current flows from P1 to P2, while the secondary current flows from S1 to S2 through an external return circuit.
Warning: High voltage may be generated if the secondary circuit is left open while the primary current is active. Always keep the secondary circuit securely closed during operation to maintain safety and stability.

This construction makes the LZZBJ9-12 a reliable and efficient solution for modern indoor power systems, delivering consistent performance in demanding conditions.

LZZBJ9-12 Current Transformer Technical Parameters

The LZZBJ9-12 Current Transformer meets power grid standards with a rated insulation level of 12/42/75 kV, frequencies of 50Hz or 60Hz, and secondary currents of 5A or 1A, adhering to GB1208-1997 standards. Supporting primary currents from 20A to 3000A, it offers high precision (0.2S, 0.5/10P10), robust performance (thermal current up to 100kA, dynamic current up to 160kA), and customizable solutions for unique applications.

Rated Primary Current (A)	Accuracy Class Combination	Rated Output (VA)	Short-time Thermal Current (kA)	Rated Dynamic Current (kA)
20~100	0.2S/10P10	10/15	150I_ln	375I_ln
150~200	0.2S/0.5/10P10	10/15/15	21.5	554
300~400	0.5/10P10	10/15	31.5	80
500~600	0.2/10P10	10/15	45	112.5
800	0.2S/10P10 0.2S/0.5/10P10 0.5/10P10 0.2/10P10	10/15 10/15/15 10/10 10/15	63	130
1000	0.2S/10P10 0.2S/0.5/10P10 0.5/10P10 0.2/10P10	10/15 10/15/15 10/10 10/15	80	160
1500	0.2/10P10	10/15	100	160
2000	0.2/10P10	10/15	100	160

Customization and Support: For unique applications or non-standard requirements, the LZZBJ9-12 Current Transformer can be customized to meet your needs, including specific current ratios or increased rated outputs. Contact us to discuss your requirements and ensure optimal performance and reliability.