The ZJ301-40.5 Insulator Capacitive Sensor is engineered for precise voltage measurement in high-voltage switchgear and substations. Designed with high-quality epoxy resin insulation, this sensor ensures reliable performance in demanding environments. It is widely used in power distribution networks, industrial substations, and critical electrical infrastructure to enhance monitoring accuracy and system safety.

Key Features and Advantages

Advantages:

1. Accurate voltage detection under varying load conditions.

2. Enhanced safety for maintenance personnel and electrical systems.

3. Long operational lifespan with minimal performance degradation.

4. Easy integration into existing switchgear and substation setups.

Technical Specifications

Applications

The ZJ301-40.5 sensor is suitable for:

• High-voltage switchgear monitoring.

• Substation voltage measurement and control.

• Industrial power distribution systems.

• Renewable energy substations for wind and solar applications.

• Power system automation and protective relays.

Daily Maintenance Guidelines

Visual Inspection

• Inspect the sensor surface for cracks, contamination, or mechanical damage.

• Check epoxy resin insulation for discoloration or deformation.

Cleaning

• Use a soft, dry cloth or approved non-abrasive cleaning agents.

• Avoid water or solvents that could compromise insulation integrity.

Electrical Check

• Verify sensor capacitance and insulation resistance with a calibrated megohmmeter.

• Ensure all connections to switchgear or monitoring devices are secure.

Scheduled Maintenance

• Monthly: Visual inspection and cleaning.

• Quarterly: Electrical testing and functional verification.

• Annually: Comprehensive inspection including mechanical and electrical tests.

Fault Analysis and Troubleshooting

Common Faults

1. Signal Deviation – Voltage readings inconsistent with actual values.

2. Insulation Failure – Caused by moisture ingress or physical damage.

3. Connector Issues – Loose or corroded electrical terminals.

Troubleshooting Steps

1. Confirm sensor connections and secure any loose terminals.

2. Clean the sensor surface to remove dust or contaminants.

3. Perform insulation resistance measurement to identify potential breakdown.

4. Replace the sensor if insulation resistance falls below recommended thresholds.

Root Cause Analysis

• Environmental Factors: Humidity, dust, temperature fluctuations.

• Mechanical Stress: Improper handling during installation or maintenance.

• Aging: Gradual degradation of epoxy resin or capacitive components over time.

Detection and Testing Standards

The ZJ301-40.5 sensor adheres to international and national standards for high-voltage equipment:

Regular testing ensures reliable voltage measurement, reduces operational risks, and complies with safety regulations.

Installation Guidelines

Pre-Installation

• Verify sensor ratings against system voltage and environmental conditions.

• Inspect packaging and sensor for any shipping damage.

• Ensure switchgear or substation mounting points are clean and dry.

Mounting Procedure

1. Position the sensor according to the electrical diagram.

2. Secure mechanical fasteners without over-tightening to avoid stress on epoxy resin.

3. Connect the sensor terminals to the voltage monitoring system.

4. Verify the connection polarity and grounding requirements.

Post-Installation Testing

• Measure capacitance and insulation resistance to confirm proper installation.

• Record initial voltage readings and compare with reference standards.

Packaging Information

• Packaging Material: Shock-resistant foam inside corrugated boxes.

• Protection: Anti-static wrapping to prevent moisture ingress.

• Labeling: Clear labeling with voltage rating, serial number, and handling instructions.

• Shipping Guidelines: Avoid dropping, excessive vibration, or exposure to water.

Quality Assurance and Compliance

• Each ZJ301-40.5 sensor undergoes factory testing for capacitance, insulation, and mechanical durability.

• Compliance with IEC, IEEE, and local power system standards ensures reliability and safety.

• Certificates of Conformance (CoC) and inspection reports are provided with each shipment.

The ZJ301-40.5 Insulator Capacitive Sensor provides high-precision voltage monitoring for high-voltage switchgear and substations. Its epoxy resin insulation, robust design, and adherence to international standards ensure long-term reliability and operational safety. Routine maintenance, proper installation, and regular testing are essential to maximize performance and lifespan.

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