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Littelfuse SE-330-28-01 NGR Monitor, 48VDC, Dual SC Fiber, IEC 61850, NC
$5,171$6,205 (-17%)
Littelfuse SE-330-28-01 Neutral Grounding Resistor (NGR) Monitor — nominal 48 VDC supply with IEC 61850 dual-fiber communications. Genuine Littelfuse protection relay for resistance-grounded systems. Fast delivery from Batam to Indonesia and Southeast Asia.
The Littelfuse SE-330-28-01 is a Neutral Grounding Resistor (NGR) Monitor and protection relay designed for resistance-grounded AC systems. Supplied for 48 VDC service with options supporting wider DC ranges, this device provides continuous NGR and ground-fault monitoring plus shorted-resistor detection. It supports IEC 61850 communications over dual SC fiber and is ideal for substations, power plants and industrial distribution where reliable neutral protection and coordinated ground-fault detection are required.
Key Features
- Continuous NGR monitoring with fast shorted-resistor detection to reduce transient overvoltages.
- Ground-fault detection and main/backup protection for the neutral path.
- Adjustable pickup 2–100% in 1% steps and configurable time delay from 0.1–10 s for coordination.
- Universal CT compatibility for easy integration with existing current transformers.
- Programmable outputs including relay contacts, analog 4–20 mA output and pulsing output (SE-330).
- IEC 61850 communications via dual SC fiber for substation automation and remote monitoring.
Technical Specifications
| Manufacturer | Littelfuse |
|---|---|
| Commercial Reference | SE-330-28-01 |
| Component | Neutral Grounding Resistor Monitor (NGR Monitor) |
| Supply Voltage | Model-dependent: 28–52 VDC or 36–72 VDC; nominal 48 VDC application |
| Communications | IEC 61850 via dual SC fiber (dual SC FBR) |
| Adjustable Pickup | 2–100% (1% increments) |
| Adjustable Time Delay | 0.1–10 s |
| Outputs | Programmable relay contacts; analog 4–20 mA; pulsing output (SE-330) |
| CT Compatibility | Universal CT input |
| Functions | Continuous NGR monitoring, shorted NGR detection, ground-fault detection |
| Contact Configuration | Variant: K4 (NC) |
Applications
Used to monitor neutral grounding resistors in resistance-grounded distribution networks, utility substations, power plants and heavy industrial facilities. Also suited for generator neutral protection and any application requiring IEC 61850-enabled neutral monitoring and remote alarm/reporting.
We supply genuine Littelfuse products through authorized distribution channels from our Batam base. Fast delivery is available across Indonesia and Southeast Asia, with competitive commercial terms. Contact us to request a quotation or technical assistance for system integration.
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