The LZZBJ9-10 current transformer is an indoor, cast-resin insulated, fully enclosed structure. It is designed for current measurement, power metering, and relay protection in AC power systems with a rated frequency of 50Hz and a rated voltage of 10kV or below. This transformer ensures reliability and precision for various industrial and utility applications.

LZZBJ9-10 Type designation

LZZBJ9-10 Service conditon

• Altitude: Not over 1000m.
• Ambient Temperature: -5°C to +40°C.
• Relative Humidity: Less than 90% at 20°C.
• Environment: Free from gas, steam, chemical deposition, pollution, explosive gases, or etching gases that could adversely affect transformer insulation.
• Vibration: No chattering or bumping.

LZZBJ9-10 CT Construction

The product features a leg-type, fully enclosed structure with a ring core. Both the primary and secondary windings are insulated with cast resin, providing enhanced insulation that ensures reliable operation under humid and polluted conditions.

The outlet markings include:

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

When the primary current flows from P1 to P2, the secondary current flows from S1 to S2 through the external return circuit. If the secondary return circuit is open while the primary current is flowing, a high voltage will be generated, posing a safety risk.

LZZBJ9-10 CT Technical Parameters

The technical parameters of the LZZBJ9-10 current transformer are designed to meet the standard requirements of power grids and electrical systems. These parameters ensure reliable performance for current measurement, power metering, and relay protection in 10kV AC power systems with a rated frequency of 50Hz.

Rated Primary Current (A)	Accuracy Class Combination	Rated Output (VA)	Short-time Thermal Current (kA)	Rated Dynamic Current (kA)
5-100	0.2S/10P10	10/15	150Iln	375Iln
150-200	0.2S/0.5/10P10	10/15/15	21.5	54
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 10/10/15 10/15 10/15	63	130
1000	0.2S/10P10 0.2S/0.5/10P10 0.5/10P10 0.2/10P10	10/15 10/10/15 10/15 10/15	80	160
1200	0.2S/10P10 0.2S/0.5/10P10 0.5/10P10 0.2/10P10	10/15 10/10/15 10/15 10/15	80	160
1500	0.2S/10P10 0.2S/0.5/10P10	10/15 10/10/15	100	160
2000	0.5/10P10 0.2/10P10	10/15 10/15	100	160

Note: Users can refer to the detailed specifications above to select the appropriate LZZBJ9-10 high-voltage current transformer model based on their specific application requirements, such as primary current, accuracy class, and rated output.

If users have special requirements for the LZZBJ9-10 current transformer or if the application parameters exceed the specified range in the table, please consult with our technical team to confirm customization options.

Outline and Dimensions of Installation

• Causes and Solutions for False Fault Alarms in Zero-Sequence Current Transformers
• Analysis of the Impact of Current Transformer Faults on Energy Meter Accuracy
• Analysis and Troubleshooting of Common Issues with Current Transformers
• Zero-Sequence Current Transformer Protection Principle and Applications
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