Product Overview
The CG5-10Q Series Indoor High-Voltage Presence Indicating Device Sensor, hereinafter referred to as the “sensor,” is a key supporting component designed for indoor high-voltage electrical systems rated at 10 kV and below.
When used with a high-voltage presence indicator, the sensor detects the energized status of a high-voltage circuit in real time and transmits the signal to the indicator for clear visual display. This helps prevent electrical misoperation and protects both maintenance personnel and high-voltage distribution equipment.
The product is manufactured using an integrated epoxy resin casting process, providing excellent electrical insulation, mechanical strength, and environmental adaptability. It is widely used in indoor high-voltage switchgear, ring main units, box-type substations, and other power distribution equipment.
Product Features
Excellent Insulation Performance
- Manufactured through integrated vacuum casting using high-quality epoxy resin, with no bubbles or cracks.
- Provides high dielectric strength and can withstand the long-term operating voltage of a 10 kV system.
- Meets the applicable insulation requirements of GB/T 1985 and related standards.
- The optimized shed structure increases the creepage distance and electrical clearance, improving resistance to pollution flashover and wet flashover in demanding indoor environments.
High Mechanical Strength
- The integrated cast structure provides excellent resistance to impact and vibration.
- Capable of withstanding mechanical stress during switchgear transportation, installation, and operation.
- Resistant to cracking and deformation.
- The stable mounting structure is compatible with different switchgear dimensions and remains secure during long-term operation.
Strong Environmental Adaptability
- Resistant to ageing, high and low temperatures, and humidity.
- Suitable for stable operation over a wide temperature range from -40°C to +70°C.
- The epoxy resin material provides good chemical resistance against common indoor dust and mildly corrosive gases.
High Operational Safety
- When used with a compatible voltage presence indicator, the sensor supports real-time voltage monitoring and electrical interlocking.
- Helps prevent incorrect operations such as operating a disconnector under load or entering an energized compartment.
- The fully insulated structure contains no exposed live parts, reducing the risk of induced voltage and accidental electric shock.
Convenient Installation and Low Maintenance
- Standardized mounting dimensions are available in 95 × 130, 95 × 135, 95 × 140, 95 × 145, 95 × 150, and 95 × 170 mm configurations.
- Compatible with multiple switchgear mounting arrangements.
- Easy to install and replace.
- The product is designed for maintenance-free operation under normal conditions, helping reduce operating and maintenance costs.
Technical Specifications
Rated Parameters
| Parameter | Specification |
|---|---|
| Rated Voltage (Un) | 10 kV |
| Rated Frequency (fn) | 50 Hz |
| Maximum Operating Voltage (Um) | 12 kV |
| Rated Insulation Level | Power-frequency withstand voltage: 42 kV for 1 minute; lightning impulse withstand voltage: 75 kV peak |
| Creepage Distance | ≥230 mm, meeting the insulation requirements of 10 kV systems |
| Applicable System | Indoor three-phase AC 10 kV high-voltage system |
Structural and Dimensional Parameters
| Model | Mounting Dimensions | Overall Height | Maximum Outside Diameter | Installation Type |
|---|---|---|---|---|
| CG5-10Q/95×130 | 95 × 130 mm | 130 mm | 110 mm | Embedded or post-mounted |
| CG5-10Q/95×135 | 95 × 135 mm | 135 mm | 110 mm | Embedded or post-mounted |
| CG5-10Q/95×140 | 95 × 140 mm | 140 mm | 110 mm | Embedded or post-mounted |
| CG5-10Q/95×145 | 95 × 145 mm | 145 mm | 110 mm | Embedded or post-mounted |
| CG5-10Q/95×150 | 95 × 150 mm | 150 mm | 110 mm | Embedded or post-mounted |
| CG5-10Q/95×170 | 95 × 170 mm | 170 mm | 110 mm | Embedded or post-mounted |
Special dimensions can be customized according to project requirements.
Environmental Parameters
| Parameter | Specification |
|---|---|
| Ambient Temperature | -40°C to +70°C |
| Relative Humidity | Daily average ≤95%; monthly average ≤90%, non-condensing |
| Installation Altitude | ≤1,000 m; high-altitude versions available |
| Seismic Resistance | Suitable for seismic intensity up to Level 8 |
| Protection Rating | IP65 for the cast body |
Matching and Performance Parameters
- Compatible voltage presence indicators: DXN-T, DXN-Q, and other indoor high-voltage presence indicator series.
- Capacitance: 10–30 pF, customizable according to the matched indicator.
- Dielectric loss factor: ≤0.005 at power frequency.
- Partial discharge: ≤10 pC at 1.1 Um/√3.
Applications
Applicable Equipment
- Indoor 10 kV high-voltage switchgear, including KYN28, XGN, and HXGN series.
- Ring main units.
- Box-type substations.
- High-voltage distribution cabinets.
- Other indoor high-voltage power distribution equipment.
Applicable Locations
- Power plants and substations.
- Industrial and mining enterprises.
- Residential communities.
- Commercial complexes.
- Other 10 kV power distribution systems.
The product is suitable for indoor high-voltage electrical installations requiring voltage presence monitoring and electrical interlocking to prevent incorrect operation.
Unsuitable Applications
The standard product is not suitable for:
- Exposed outdoor installation.
- Strongly corrosive environments.
- Environments with electromagnetic interference exceeding the specified range.
- High-voltage systems rated above 12 kV.
- Indoor environments with severe condensation, water accumulation, or explosive dust without additional protection.
Customized versions are available for special operating conditions.
Operating Conditions
Normal Operating Conditions
- Ambient temperature: -40°C to +70°C.
- Daily temperature variation: no more than 25°C.
- Installation altitude: no more than 1,000 m.
- Daily average relative humidity: no more than 95%.
- Monthly average relative humidity: no more than 90%.
- The installation environment should be free from condensation, severe dust, violent vibration, explosion hazards, corrosive gases, and heavy pollution.
- Indoor installation only.
- The sensor should be installed vertically, with an inclination angle of no more than 5°.
For installations above 1,000 m, insulation correction should be carried out according to GB/T 11022, and a customized high-altitude version should be selected.
Special Operating Conditions
Customized products are required for:
- High-altitude areas from 1,000 to 4,000 m, requiring an increased creepage distance and optimized insulation structure.
- High-temperature, high-humidity, or condensation-prone environments, requiring anti-condensation measures and specialized epoxy resin.
- Heavily polluted environments, requiring an increased creepage distance and pollution-resistant shed structure.
- Strong-vibration environments, requiring reinforced mounting and improved seismic resistance.
Installation and Operating Requirements
Installation Requirements
- Pre-installation inspection: Confirm that the sensor is free from cracks, damage, bubbles, and deformation. Verify that the model, dimensions, and mounting-hole spacing match the switchgear.
- Mounting: Secure the sensor with bolts and ensure that it is firmly connected to the switchgear enclosure and high-voltage busbar.
- Wiring: Connect the secondary terminal securely to the voltage presence indicator. Ensure that all insulation wrapping and terminal protection are complete.
- Secondary circuit insulation resistance: ≥100 MΩ.
- Electrical clearance: After installation, confirm that the clearances and creepage distances between live parts, the switchgear enclosure, and grounded structures meet the requirements of the 10 kV system.
Operating Requirements
- The sensor must be used with a qualified high-voltage presence indicator and must not be operated independently.
- Installation, removal, or maintenance while the sensor is energized is strictly prohibited.
- Regularly inspect the sensor body and wiring for looseness, damage, contamination, or discharge marks.
- If cracking, discharge, insulation breakdown, or other abnormalities occur, immediately de-energize the equipment and replace the sensor.
Maintenance and Care
- Routine inspection: Inspect the sensor monthly for cracks, discharge marks, contamination, and loose wiring.
- Periodic testing: Conduct insulation resistance and power-frequency withstand voltage tests every one to three years. Continue operation only after the test results are confirmed as acceptable.
- Cleaning: Clean the sensor surface using a dry cloth. Do not use wet cloths or corrosive cleaning agents.
- Storage: Store the product indoors in a dry, ventilated environment free from corrosive gases. Protect it from direct sunlight, compression, and impact.
Applicable Standards
- GB/T 1985, High-Voltage Alternating-Current Disconnectors and Earthing Switches
- GB/T 11022, Common Specifications for High-Voltage Switchgear and Controlgear Standards
- DL/T 538, Technical Specifications for High-Voltage Presence Indicating Devices
- JB/T 10686, Sensors for High-Voltage Presence Indicating Devices
Precautions
- This product is a high-voltage electrical component. Installation and maintenance must be carried out by qualified electrical personnel in strict accordance with electrical safety procedures.
- Unauthorized disassembly or modification is prohibited, as it may damage the insulation structure and cause a safety hazard.
- Avoid severe impact, dropping, or compression during transportation and handling to prevent cracking of the epoxy resin body.
- The recommended service life is generally 20 years. Replacement is recommended when the product exceeds its specified service life to maintain operational safety.
Model Description
CG5-10Q/95×130
- CG5: Indoor high-voltage presence indicator sensor series.
- 10Q: Rated voltage of 10 kV; Q indicates an indoor spherical or post-type structure.
- 95×130: Mounting dimensions in millimetres. Other available specifications include 95 × 135, 95 × 140, 95 × 145, 95 × 150, and 95 × 170 mm.