GWDG-H2 Transformer Online Dissolved Hydrogen Monitoring System

Product Desc

The GWDG-H2 Transformer Online Dissolved Hydrogen Monitoring System continuously monitors the concentration of dissolved hydrogen (H₂) in the insulating oil of oil-immersed transformers, providing data to support the identification of abnormal conditions and transformer condition assessment. The system has a compact, integrated design, is easy to install, and requires no consumables. Its measurement cycle is no more than 10 minutes, and measurement data can be transmitted to a supervisory system. Typical applications include power stations, substations, railway traction substations and special-purpose oil-immersed transformers.

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+8617621210051

+86-17621210051

Dissolved H₂

Transformer Oil Monitoring

Measuring Range

10–2,000 μL/L

Measuring Cycle

≤10 Minutes

No Consumables

Compact, Integrated Design

Communication

Modbus / IEC 61850

Fast Delivery

Global Shipping

Warranty

2 Year Warranty

1. Product Introduction

The GWDG-H2 selectively measures the concentration of dissolved hydrogen in transformer insulating oil, enabling operators to track this important condition indicator. The measurement data supports further investigation, transformer condition assessment and maintenance planning.
The system features a compact, integrated structure for convenient installation and requires no consumables. Optional functions include moisture-in-oil monitoring, oil temperature monitoring, oil pressure monitoring and transformer core monitoring, depending on project requirements.

Key Technical Specifications

GWDG-H2 transformer online dissolved hydrogen monitoring system technical specifications

2. Product Functions

Dissolved Hydrogen Monitoring: Selectively measures the concentration of dissolved hydrogen in transformer insulating oil to support transformer condition assessment.
Automatic Periodic Measurement: Acquires dissolved hydrogen concentration data through automatic measurement cycles of no more than 10 minutes.
Remote Data Transmission: Transmits measurement results to a supervisory system through the communication interfaces for centralised monitoring and data viewing.
Moisture-in-Oil Monitoring (Optional): Monitors moisture content in insulating oil to support assessment of the oil’s moisture condition.
Oil Temperature Monitoring (Optional): Measures transformer oil temperature to support analysis of operating conditions.
Oil Pressure Monitoring (Optional): Monitors transformer oil pressure to provide additional data for operating condition assessment.
Transformer Core Monitoring (Optional): Provides transformer core monitoring according to project requirements. The specific monitored quantities and technical specifications are defined in the project configuration.

3. Applications

The GWDG-H2 is suitable for online dissolved hydrogen monitoring in oil-immersed transformers across different voltage classes. Product selection should take into account transformer construction, installation conditions and monitoring requirements.
Power Station Transformers: Provides ongoing dissolved hydrogen concentration measurements to support operation and maintenance planning.
Substation Transformers: Transmits dissolved hydrogen monitoring data to a supervisory system for centralised transformer condition monitoring.
Railway Traction Transformers: Supports online dissolved hydrogen monitoring in oil-immersed traction transformers.
Special-Purpose Transformers: Suitable for special-purpose oil-immersed transformers that meet the product’s installation and operating requirements.
Existing Transformer Monitoring Upgrades: Provides an online dissolved hydrogen monitoring solution for existing transformers, with installation arrangements determined by site conditions.

Frequently Asked Questions (FAQ)

Q:What does the GWDG-H2 Transformer Online Dissolved Hydrogen Monitoring System do?

The GWDG-H2 continuously measures the concentration of dissolved hydrogen in transformer insulating oil. The data supports the identification of abnormal conditions, transformer condition assessment and maintenance planning. Measurement results should be evaluated alongside operating conditions and other diagnostic information.

Q:Why monitor dissolved hydrogen in oil-immersed transformers?

Dissolved hydrogen is an important indicator in dissolved gas analysis (DGA) of transformer oil. Ongoing measurement of its concentration helps operators identify changes in transformer condition and determine whether oil sample analysis or further inspection is required.

Q:What is the difference between transformer dissolved hydrogen monitoring and multi-gas DGA?

The GWDG-H2 primarily monitors dissolved hydrogen in insulating oil, providing concentration data for a single gas. Multi-gas dissolved gas analysis (DGA) measures several gases and supports a broader assessment based on gas composition and changes over time. Further fault diagnosis should combine multi-gas DGA results with relevant tests and operating information.

Q:What are the measurement range and accuracy of the GWDG-H2 Transformer Online Dissolved Hydrogen Monitoring System?

The dissolved hydrogen measurement range is 10–2,000 μL/L, with a minimum detectable concentration of 10 μL/L. The stated measurement accuracy is ±10% of reading or ±20 μL/L, whichever is greater. Applicable measurement conditions should be confirmed in the product’s technical specification.

Q:How often does the GWDG-H2 Online Dissolved Hydrogen Monitoring System take measurements?

The measurement cycle is no more than 10 minutes. This specification refers to the measurement cycle; it does not define the response time required for the system to reach its final reading after a change in dissolved hydrogen concentration.

Q:Which communication interfaces and protocols does the GWDG-H2 Dissolved Hydrogen Monitoring System support?

The system provides RS-485 and Ethernet communication interfaces and supports Modbus and IEC 61850, subject to project configuration. Specific protocol variants, interface assignments and system integration requirements should be confirmed during product selection.

Q:Does the GWDG-H2 Transformer Dissolved Hydrogen Monitoring System require consumables?

The system requires no consumables. Routine inspection and maintenance should still be carried out in accordance with the product manual and site maintenance procedures

Q:Can the GWDG-H2 Dissolved Hydrogen Monitoring System also monitor moisture-in-oil, oil temperature and oil pressure?

Optional functions include moisture-in-oil monitoring, oil temperature monitoring, oil pressure monitoring and transformer core monitoring. The required functions and their technical specifications should be confirmed during product selection.

Q:Which transformers can use the GWDG-H2 Online Dissolved Hydrogen Monitoring System?

The system is suitable for oil-immersed transformers in power stations, substations, railway traction substations and special-purpose applications. It can also be used to upgrade monitoring on existing transformers. Suitability should be confirmed based on transformer construction, installation connections and site conditions.