📄 Technical Description
Industrial photovoltaic DC disconnect switch model S5-02504PR00U manufactured by Telergon, used in centralized ABB Aurora Central inverters for isolation and disconnection of the DC line coming from the photovoltaic field.
This device is designed for high-power photovoltaic and utility-scale applications, allowing safe disconnection of the DC circuit during maintenance, emergency operations, or inverter shutdown procedures.
The disconnect switch features a heavy-duty industrial construction with high breaking capacity, suitable for photovoltaic systems up to 1000 Vdc with high nominal current ratings.
⚙️ Main Functions
The device performs the following operational functions:
✔ DC-side electrical isolation
✔ Photovoltaic field disconnection
✔ High-voltage DC circuit interruption
✔ Maintenance safety isolation
✔ Operator and system protection
✔ Rapid DC power shutdown
🌐 Applications
Compatible with industrial and centralized photovoltaic systems including:
- ABB Aurora Central inverters
- Utility-scale photovoltaic inverters
- DC combiner and distribution panels
- High-power three-phase PV systems
🔧 Technical Specifications
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Manufacturer: Telergon
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Model: S5-02504PR00U
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Type: DC Disconnect Switch
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Application: Industrial photovoltaic systems
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Rated Voltage: 1000 Vdc
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Rated Current: 250 A
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Breaking Capacity: 10 kA
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Utilization Category: DC21B
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Standard Compliance: IEC 60947-3
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Certification: UL98
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Operation: Manual lever handle
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Operating Temperature: -20°C to +50°C
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Connections: High-current busbar terminals
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Installation: Inside inverter or DC electrical cabinet
🛡 Key Features
✔ High reliability in DC applications
✔ Reinforced industrial construction
✔ High resistance to DC arc formation
✔ Heavy-duty high-capacity contacts
✔ Fast isolation and switching system
✔ Suitable for high-voltage photovoltaic systems
✔ Designed for continuous industrial operation
⚠️ Typical Faults & Symptoms
A worn or defective DC disconnect switch may cause:
❗ Terminal overheating
❗ Contact oxidation
❗ DC-side voltage drop
❗ Electrical arcing
❗ Failure to close the circuit
❗ Mechanical lever blockage
❗ Internal contact melting
❗ Inverter production interruption
🚨 Possible Related Inverter Errors
DC disconnect switch failures may generate inverter alarms such as:
- DC Input Fault
- PV Isolation Error
- DC Bus Error
- Ground Fault
- No DC Input
- Start-up Failure
- PV Configuration Error
- DC Switch Error
(Error naming may vary depending on inverter firmware.)
🛠 Typical Uses
- Repair of ABB Aurora Central inverters
- Replacement of faulty DC disconnect switches
- Maintenance of utility-scale PV plants
- Industrial photovoltaic revamping
- Retrofit of photovoltaic systems
🔌 Compatibility
Compatible with several industrial photovoltaic inverter platforms including:
- ABB Aurora Central
- ABB PVS series
- Industrial multi-string inverters
- Centralized high-power photovoltaic systems
🟢 Summary
The Telergon S5-02504PR00U is a professional high-performance DC disconnect switch designed for industrial photovoltaic systems.
Rated for up to 1000 Vdc and 250 A, it ensures safe isolation, high reliability, and effective DC-side protection in centralized ABB Aurora photovoltaic inverters.
