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Littelfuse SE-330HV-03-01 NGR Monitor High Voltage Ethernet NC
$4,971$5,965 (-17%)
Littelfuse SE-330HV-03-01 NGR Monitor — neutral grounding resistor protection relay with wide supply (65–265 V AC / 85–275 V DC), Ethernet/USB communications and 4–20 mA output. Genuine Littelfuse product with fast delivery from Batam, Indonesia.
The Littelfuse SE-330HV-03-01 is a conformally coated Neutral Grounding Resistor (NGR) Monitor / protection relay for resistance-grounded AC systems. With a wide supply range (65–265 V AC / 85–275 V DC), Ethernet and USB communications, and analog 4–20 mA output, it provides continuous NGR, shorted-resistor and ground-fault detection. Suited for substations, distribution switchgear, transformer neutrals and industrial power systems requiring reliable NGR monitoring and protection.
Key Features
- Conformal coating for enhanced durability in harsh industrial environments and improved moisture resistance.
- Continuous NGR monitoring with dedicated shorted-NGR and ground-fault detection to identify resistor failures quickly.
- Adjustable sensitivity (pickup 2–100% in 1% increments) and adjustable trip delay (0.1–10 s) for precise coordination.
- Universal CT compatibility and pulsing output available on SE-330 family to support varied current transformer types and testing.
- Programmable output contacts with selectable fail-safe or non-fail-safe operating modes plus front-panel or remote reset options.
- Communications via Ethernet and USB, 4–20 mA analog output, and standard harmonic filtering for stable measurement in noisy systems.
Technical Specifications
| Manufacturer | Littelfuse |
|---|---|
| Commercial Reference | SE-330HV-03-01 |
| Component | Neutral Grounding Resistor Monitor / Protection Relay |
| Supply Voltage | 65–265 V AC; 85–275 V DC |
| Adjustable Pickup | 2–100% (1% steps) |
| Adjustable Time Delay | 0.1–10 s |
| Analog Output | 4–20 mA |
| Communications | Ethernet, USB |
| CT Compatibility | Universal CT compatible |
| Reset Options | Front-panel or remote reset |
| Protection Features | Continuous NGR monitoring, shorted NGR detection, ground-fault detection, harmonic filtering |
| Coating | Conformal coating |
Applications
Monitor and protect neutral grounding resistors on medium- and high-voltage transformer neutrals, distribution switchgear, utility substations, industrial power systems and generator sets where reliable ground-fault detection and NGR failure identification are required.
We supply genuine Littelfuse SE-330HV-03-01 units through authorized channels from our Batam base, with fast delivery across Indonesia and Southeast Asia. Competitive pricing and local technical support available — contact us to request a quotation or assistance with system integration.
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