Model: HMJ1010-WAT
Product Overview
The Smart 3-in-1 Sensor integrates three detection technologies: Ultrasonic (AA), Transient Earth Voltage (TEV), and Temperature & Humidity. It is widely used in substations, switching stations, and other electrical environments to monitor partial discharge and ambient temperature/humidity in ring main units (RMUs) and switchgear. This device enables early detection of potential insulation defects and provides critical support for the safe and stable operation of electrical equipment.
Key Features
1.Multi-Parameter Integrated Detection
The sensor combines TEV, AA, and temperature/humidity measurement into a single unit. It simultaneously collects electrical signals, mechanical vibration data, and environmental conditions. The multi-dimensional data enables comprehensive and accurate assessment of partial discharge activity and insulation health.
2.Strong Anti-Interference Capability
Equipped with advanced filtering, shielding, and noise suppression technologies, the sensor can operate reliably in complex electromagnetic environments commonly found in power systems.
3.Intelligent Diagnosis & Early Warning
Built-in smart algorithms and data analysis modules enable real-time processing of collected data. The sensor can automatically identify patterns and characteristics of partial discharge. Based on preset thresholds and rules, it performs fault diagnosis and generates early warnings, helping to prevent insulation failures.
4.Easy Installation
Typically mounted using magnetic or other quick installation methods, the sensor requires no major modifications or disassembly of power equipment. It can be installed and maintained while equipment remains energized, ensuring uninterrupted power supply and equipment safety.
Technical Specifications
| Parameter | Specification |
| TEV | Frequency Range: 1–100 MHz |
| Measurement Range: 0–70 dB | |
| AA | Resonant Frequency: 40 kHz |
| Measurement Range: -10–75 dB | |
| Temperature | Measurement Range: -40 to +125℃ |
| Humidity | Measurement Range: 0–100% RH |
| Communication | Wireless version: LoRa |
| Wired version: RS485 | |
| Power Supply | Wireless version: Built-in Li-battery |
| Wired version: DC 24V | |
| Operating Temp | -40 to +85℃ |
| Operating Humidity | 5–95% RH |
Frequently Asked Questions about 3-in-1 partial discharge sensor
What is the 3-in-1 partial discharge sensor (HMJ1010-WAT) used for?
The 3-in-1 partial discharge sensor — model HMJ1010-WAT is designed for continuous online partial discharge monitoring of HV switchgear and cables. It is deployed in HV switchgear, cable terminations, GIS and transformer bushings, where it gives maintenance teams continuous or periodic visibility of insulation condition so that defects can be identified before they develop into unplanned outages.
Which detection principle does this sensor use, and how do I choose?
Different partial discharge defects are best seen with different coupling methods. UHF sensors pick up electromagnetic waves emitted by discharge inside metal-enclosed equipment and give good immunity to corona from outside; HFCT sensors couple to the pulse current flowing on the earthing or cable screen and suit cable and transformer applications; contact ultrasonic and TEV sensors are used for surface and internal discharge in switchgear. The HMJ1010-WAT listed here applies the principle best matched to its intended installation, and multi-function versions combine several principles in one housing where the defect type cannot be predicted in advance.
How is the 3-in-1 partial discharge sensor powered and how does it communicate?
The HMJ1010-WAT uses the following interface configuration: communication is Wireless version: LoRa; power supply is Wireless version: Built-in Li-battery. This allows the same device to be fitted in both retrofitted installations and new builds; the exact combination is confirmed at order stage against the site communication architecture.
Is installation possible without an outage?
In most cases yes. Because the 3-in-1 partial discharge sensor is installed on the equipment while it remains energised, the work is normally carried out as a live-line operation by qualified personnel following the site safety rules. Where a sensor must be coupled to an earthed screen, bonded connection or gas compartment, a short outage may be required — this is confirmed during the site survey.
Does HUWOR support OEM/ODM and what is the delivery lead time?
Yes. Zhuhai Huawang Technology Co., Ltd. supplies the 3-in-1 partial discharge sensor under its own brand and also supports OEM/ODM supply, including private labelling, custom firmware functions and integration with the customer’s monitoring platform. Standard units are typically quoted with a lead time confirmed at order stage depending on quantity and configuration; sample and pilot orders are supported.
Applications
The 3-in-1 partial discharge sensor is used for continuous online partial discharge monitoring of HV switchgear and cables. Typical installation sites include HV switchgear, cable terminations, GIS and transformer bushings. It is applied both on new assets, where the monitoring function is built into the asset from the start, and on existing assets where it is retrofitted to extend the information available to the maintenance team.
How it works
The instrument converts the physical quantity of interest into an electrical signal, conditions and digitises that signal in the field unit, and passes the result to the monitoring platform or to the operator. Condition assessment relies on the trend rather than on a single reading: the value recorded today is compared with the commissioning value and with the historical series for the same measurement point, and it is the direction and rate of change that indicate whether the asset is degrading.
Installation and commissioning
Installation follows three steps: a site survey to confirm the mounting position, the communication path and the power arrangement; mechanical fitting of the sensor or the use of the instrument on the test point; and finally commissioning, where the readings are verified against a reference and the alarm thresholds are set.
For this model the relevant interface conditions are: communication Wireless version: LoRa, power supply Wireless version: Built-in Li-battery.
Standards and documentation
Type test reports, calibration certificates and installation documentation are provided with the supply. Where a project requires the equipment to be verified against a specific national or utility standard, the applicable clauses should be stated in the enquiry so that the test scope can be confirmed at quotation stage.
Frequently Asked Questions about 3-in-1 partial discharge sensor
What is the 3-in-1 partial discharge sensor (HMJ1010-WAT) used for?
The 3-in-1 partial discharge sensor — model HMJ1010-WAT is designed for continuous online partial discharge monitoring of HV switchgear and cables. It is deployed in HV switchgear, cable terminations, GIS and transformer bushings, where it gives maintenance teams continuous or periodic visibility of insulation condition so that defects can be identified before they develop into unplanned outages.
Which detection principle does this sensor use, and how do I choose?
Different partial discharge defects are best seen with different coupling methods. UHF sensors pick up electromagnetic waves emitted by discharge inside metal-enclosed equipment and give good immunity to corona from outside; HFCT sensors couple to the pulse current flowing on the earthing or cable screen and suit cable and transformer applications; contact ultrasonic and TEV sensors are used for surface and internal discharge in switchgear. The HMJ1010-WAT listed here applies the principle best matched to its intended installation, and multi-function versions combine several principles in one housing where the defect type cannot be predicted in advance.
How is the 3-in-1 partial discharge sensor powered and how does it communicate?
The HMJ1010-WAT uses the following interface configuration: communication is Wireless version: LoRa; power supply is Wireless version: Built-in Li-battery. This allows the same device to be fitted in both retrofitted installations and new builds; the exact combination is confirmed at order stage against the site communication architecture.
Is installation possible without an outage?
In most cases yes. Because the 3-in-1 partial discharge sensor is installed on the equipment while it remains energised, the work is normally carried out as a live-line operation by qualified personnel following the site safety rules. Where a sensor must be coupled to an earthed screen, bonded connection or gas compartment, a short outage may be required — this is confirmed during the site survey.
Does HUWOR support OEM/ODM and what is the delivery lead time?
Yes. Zhuhai Huawang Technology Co., Ltd. supplies the 3-in-1 partial discharge sensor under its own brand and also supports OEM/ODM supply, including private labelling, custom firmware functions and integration with the customer’s monitoring platform. Standard units are typically quoted with a lead time confirmed at order stage depending on quantity and configuration; sample and pilot orders are supported.
Applications
The 3-in-1 partial discharge sensor is used for continuous online partial discharge monitoring of HV switchgear and cables. Typical installation sites include HV switchgear, cable terminations, GIS and transformer bushings. It is applied both on new assets, where the monitoring function is built into the asset from the start, and on existing assets where it is retrofitted to extend the information available to the maintenance team.
How it works
The instrument converts the physical quantity of interest into an electrical signal, conditions and digitises that signal in the field unit, and passes the result to the monitoring platform or to the operator. Condition assessment relies on the trend rather than on a single reading: the value recorded today is compared with the commissioning value and with the historical series for the same measurement point, and it is the direction and rate of change that indicate whether the asset is degrading.
Installation and commissioning
Installation follows three steps: a site survey to confirm the mounting position, the communication path and the power arrangement; mechanical fitting of the sensor or the use of the instrument on the test point; and finally commissioning, where the readings are verified against a reference and the alarm thresholds are set.
For this model the relevant interface conditions are: communication Wireless version: LoRa, power supply Wireless version: Built-in Li-battery.
Standards and documentation
Type test reports, calibration certificates and installation documentation are provided with the supply. Where a project requires the equipment to be verified against a specific national or utility standard, the applicable clauses should be stated in the enquiry so that the test scope can be confirmed at quotation stage.
评价
目前还没有评价