Products Description
Our transformer core ground current monitoring system collects low-level and fault-related grounding current through a dedicated sensor. The monitor records values, provides alarms, and supports station communication according to the configured interface.
Technical Principle
Current sensors measure sheath circulating current and cable load current at grounding points. The monitoring unit compares phase balance, magnitude, and trend changes to identify abnormal grounding, sheath faults, or excessive induced current.
Product Features
The transformer core ground current monitoring system tracks both core and clamp ground-current behavior over time. The zero-flux sensor supports accurate low-current measurement. Low monitor power demand is suitable for continuous substation service. Live installation can reduce retrofit disruption when site procedures permit it.
Operating Conditions
The product shall be installed and operated within the ratings stated in the technical parameters. Key site requirements include: Operating temperature; Relative humidity; power supply.. Keep the installation area clean, adequately ventilated, free from corrosive gas and severe vibration, and provide the specified grounding, clearance, and power quality.
Product Parameters
|
Parameter |
Details |
|
Measurement range |
1 mA-10 A |
|
Measurement accuracy |
±1% or ±1 mA, whichever is greater |
|
Power supply |
AC 220 V ±10%, 50 Hz |
|
Power consumption |
<5 W |
|
Operating temperature |
-40°C to +120°C |
|
Relative humidity |
≤95% |
|
Sensor principle |
Zero-flux current sensing |
|
Installation |
Live installation supported |
|
Communication reference |
DL/T 860 |
Product Advantages
- The transformer core ground current monitoring system tracks both core and clamp ground-current behavior over time.
- The zero-flux sensor supports accurate low-current measurement.
- Low monitor power demand is suitable for continuous substation service.
- Live installation can reduce retrofit disruption when site procedures permit it.
Main Applications
The transformer core ground current monitoring system is used for power-transformer core and clamp grounding circuits that require abnormal-current warning.
It is installed in substations, power plants, and industrial high-voltage facilities.
Trend data assists detection of multi-point core grounding and insulation deterioration.
Components
|
Part |
Function |
|
Core-current sensor |
Measures current in the transformer core grounding lead. |
|
Clamp-current sensor |
Measures the clamp grounding lead when configured. |
|
Monitoring unit |
Displays, records, and evaluates the current signals. |
|
Communication interface |
Transfers values and alarms to the station system. |
FAQ
Q: What information is needed for model selection?
A: Provide the core and clamp grounding arrangement, conductor size, expected current, and alarm philosophy.
Q: What should be checked before installation?
A: Check sensor orientation, grounding-lead routing, conductor clearance, shielding, and monitor power supply.
Q: How can the device or system be integrated?
A: The monitor can exchange measurements and alarms with the station platform under the selected DL/T 860 arrangement.
Q: Which options should be confirmed before production?
A: Confirm one or two sensing channels, sensor aperture, cable length, installation hardware, and communication interface.
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