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Littelfuse SE-330AU-07-01 NGR Monitor, SC Fiber/RJ45, IEC 61850
$4,923$5,907 (-17%)
Littelfuse SE-330AU-07-01 Neutral Grounding Resistor (NGR) monitor — conformally coated protection relay with wide 65–265 VAC / 85–275 VDC supply. Genuine Littelfuse unit from Batam with fast delivery across Indonesia and Southeast Asia.
The Littelfuse SE-330AU-07-01 is a conformally coated Neutral Grounding Resistor (NGR) monitor and protection relay for resistance-grounded AC systems. With a wide supply voltage range (65–265 VAC / 85–275 VDC) and selectable trip-level options, this protection relay continuously monitors neutral current, neutral-to-earth voltage and resistance. Ideal for NGR monitoring and earth-fault supervision in low- and medium-voltage transformers, generators and distribution switchgear with IEC 61850 or serial/USB communications.
Key Features
- Conformally coated electronics for increased environmental protection in industrial installations.
- Multiple contact configurations: 1 Form A, 1 Form B, or 2 Form C with fail-safe operation.
- Wide supply voltage window supports 65–265 VAC and 85–275 VDC systems for flexible integration.
- Continuous monitoring of neutral current, neutral-to-earth voltage and neutral-to-earth resistance (NER).
- Communications options include USB and IEC 61850 for integration into protection and SCADA systems.
- Front-panel switch plus a normally-open (N.O.) contact for manual reset and local control.
Technical Specifications
| Manufacturer | Littelfuse |
|---|---|
| Commercial Reference | SE-330AU-07-01 |
| Component | Neutral Grounding Resistor Monitor |
| Supply Voltage | 65–265 VAC / 85–275 VDC |
| Contact Configurations | 1 Form A, 1 Form B, or 2 Form C (fail-safe) |
| Communications | USB, IEC 61850 |
| Monitored Parameters | Neutral current, neutral-to-earth voltage, neutral-to-earth resistance (NER) |
| Controls / Reset | Front-panel switch with N.O. reset contact |
| Protection | Conformally coated relay for resistance-grounded systems |
Applications
Used to supervise NGRs on distribution transformers, monitor generator neutral earthing resistors, detect earth-faults in medium-voltage switchgear, and integrate into substation protection schemes and industrial power distribution panels.
We supply genuine Littelfuse SE-330AU-07-01 units through authorized distribution from our Batam base. Fast delivery across Indonesia and Southeast Asia, competitive pricing and local support. Contact us to request a formal quotation or technical clarification.
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