Overview

The JSZW3-10 Indoor Three-Phase Epoxy Resin Combined Voltage Transformer is a high-performance, dry-type product specifically designed for 10kV power systems. Built with epoxy resin casting, it ensures enhanced insulation, durability, and reliability for indoor applications.

Available in two configurations—Yo/Yo/[ (JSZW3-10) and Yo/Yo/Yo/[ (JSZW3-10F)—this transformer is suitable for energy metering, voltage monitoring, and relay protection in power systems operating at rated frequencies of 50Hz or 60Hz. With its robust design, the JSZW3-10 delivers stable performance, even in demanding environments, ensuring long-term operational safety and efficiency.

Type Designation for JSZW3-10

• J: Voltage Transformer
• S: Three-phase
• Z: Casting Resin Insulated
• W: Five-leg Type
• 3-10: Design Sequence and Voltage Grade (kV)

This type designation outlines the structural and functional features of the JSZW3-10 Combined Voltage Transformer,

Operating Conditions

1. Altitude: ≤3,000 meters.
2. Temperature: -5°C to +40°C.
3. Humidity: ≤85% relative humidity at 20°C.
4. Environment: Free from corrosive gases and contaminants.

Technical Data for JSZW3-10 Combined Voltage Transformer

• Standards: Complies with GB1207 and IEC60044-2.
• Rated Insulation Level: Available at 12/42/75 kV and 7.2/32/60 kV.
• Rated Frequency: Supports both 50Hz and 60Hz systems.

Type	Rated Voltage Ratio (V)	Accuracy Class & Rated Output (VA)				Max Output (VA)	Rated Insulation Level (KV)
		0.2	0.5	1	6p
JSZW3-10	10000/3/100/3/100/3	15	30	60	50	300	12/42/75
JSZW3-6	6000/3/100/3						7.2/32/60
JSZW3-3	3000/3/100/3						3.6/20/40

Notes: Voltage resistance should not exceed 15% for circuit breaker operating power.

Outline and Dimensions of Installation

JSZW3-10 Combined Voltage Transformer Outline and Dimensions of Installation

Ordering Guidelines and Important Notes

When placing an order for the JSZW3-10 Combined Voltage Transformer, please specify the following:

1. Voltage and Current Ratios: Confirm the required voltage and current ratios to match your application needs.
2. Accuracy Class: Specify the accuracy class (e.g., 0.2, 0.5) to ensure precise metering and monitoring.
3. Insulation and Withstand Voltage: Provide the required insulation level and withstand voltage specifications to suit your operating environment.
4. Custom Configurations: Indicate any specific requirements for size, operating conditions, or unique configurations.

For further assistance or tailored solutions to meet unique application needs, contact our technical support team for professional guidance.

FAQs for JSZW3-10 Combined Voltage Transformer

1. What configurations are available for the JSZW3-10 Combined Voltage Transformer?
   It supports Yo/Yo/[ and Yo/Yo/Yo/[ configurations, offering flexibility for three-phase energy metering and relay protection.
2. What are the primary applications of the JSZW3-10 transformer?
   The transformer is ideal for indoor 10kV power systems, ensuring accurate voltage measurement, energy metering, and relay protection.
3. Can the JSZW3-10 be customized for specific operational needs?
   Yes, it can be tailored for unique voltage ratios, insulation levels, accuracy classes, and wiring configurations to meet specific requirements.
4. What standards does the JSZW3-10 Combined Voltage Transformer comply with?
   It adheres to GB1207 and IEC60044-2 standards, ensuring high safety, durability, and reliable performance in indoor systems.
5. What maintenance is required for the JSZW3-10 transformer?
   Maintenance involves periodic inspections for cleanliness, operational integrity, and ensuring the fuses and connections remain secure.
6. How does the epoxy resin casting enhance the transformer’s reliability?
   The epoxy resin casting provides high mechanical strength, excellent insulation, and resistance to moisture and environmental contaminants, ensuring stable performance over time.

• Fault Handling Considerations for Current and Voltage Transformers
• Introduction to Combined Transformers and Their Classification
• 3 Voltage Transformer Faults and Solutions: Ensuring Accurate Measurement and Protection
• Zero-Sequence Current Transformer Protection Principle and Applications
• Common Faults and Troubleshooting of Current Transformers Faults
• A Discussion on the Saturation Point of Current Transformers: Transformer Protection and Current Protection