Description
The product Hydran S2 refers to an online monitoring system designed for power transformers, originally developed and manufactured by GE (General Electric).
Product Overview
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Manufacturer: GE (General Electric / GE Grid Solutions / Energy)
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Part Number / Model: Hydran S2
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Component Type: Online Dissolved Gas Analysis (DGA) and Moisture Monitoring System
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Platform: Substation Asset Condition Monitoring (Smart Grid Solutions)
Key Specifications & Features
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Sensing Technology: Utilizes a proven membrane-based composite gas-sensing technology that acts as an early-warning system (“smoke detector”) for the overall concentration of combustible fault gases.
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Monitoring Parameters:
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Composite Fault Gases: Measures cumulative levels of gases such as Hydrogen ($H_2$), Carbon Monoxide ($CO$), Acetylene ($C_2H_2$), and Ethylene ($C_2H_4$) resulting from internal electrical or thermal faults.
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Moisture: Tracks water content in transformer insulating oil.
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Communication Interfaces:
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RS-485 serial connection utilizing Modbus protocol.
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Hardwired 4–20 mA analog outputs.
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Programmable alarm relay contacts for local warning integration.
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Physical Enclosure: Ruggedized IP66 (NEMA 4X) rated housing designed to withstand harsh outdoor substation environments and wide ambient temperature swings.
Industrial Deployment
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Applications: Widely installed on medium-to-large high-voltage power transformers, autotransformers, and on-load tap changers (OLTC) in electrical substations and power generation facilities to prevent catastrophic failures and unplanned outages through continuous real-time health tracking.
HYDRAN S2
Product Overview
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | HYDRAN S2 |
| Module Type | On-line DGA Dissolved Gas Monitor |
| Manufacturer | GE Vernova (Morgan Schaffer) |
| Sensor Options | Composite Gas Sensor / Hydrogen-only Sensor |
| Detected Gases (Composite Version) | H₂ (100% response), CO, C₂H₂, C₂H₄ |
| Equivalent Hydrogen Measuring Range | 0 ~ 2000 ppm |
| Measurement Accuracy | ±10% of reading ±25 ppm |
| T90 Response Time | 10 minutes |
| Sampling Method | Natural oil convection, no built-in pump |
| Power Supply | 24 VDC |
| Analog Output | Isolated 4–20 mA (gas concentration) |
| Alarm Output | Relay contact outputs for threshold alarms |
| Mounting Standard | Direct installation on transformer drain/sampling valve |
| Operating Temperature | -40℃ ~ +70℃ |
| Ambient Humidity | 5%–95% non-condensing |
| Protection Class | IP66 for outdoor cabinet direct mounting |
| Supported Oil Medium | Mineral insulating oil |
| Status Indicators | Power normal, fault and alarm visual LEDs |
| Spare Part Status | Original production discontinued; new surplus and refurbished units available |
Key Features
- Two optional sensor configurations to match different asset importance: composite gas sensor for main transformers; hydrogen-only sensor for auxiliary transformers and reactors
- Fuel cell sensor without consumable carrier gas, low routine maintenance workload
- No internal moving parts, effectively lowering failure risks under long-term continuous operation
- Single valve direct mounting design, simple installation, generally without transformer outage required
- Built-in calculation algorithm outputs composite gas index, facilitating staff to judge fault severity trend
- Multi-level adjustable alarm thresholds to avoid false alarms caused by load fluctuation
- Supports connection with DCS, SCADA via 4–20mA analog signals for remote monitoring
- Industrial sealed housing adapts to outdoor substation and power plant cabinet environments
- Strict full model verification required; sensor type variants cannot be directly interchanged without calibration
- Widely used for maintenance spare replacement of legacy Hydran series transformer monitoring systems
