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Littelfuse SE-330AU-28-00 NGR Monitor 48VDC Dual SC Fiber IEC 61850 NO
$5,171$6,205 (-17%)
Littelfuse SE-330AU-28-00 Neutral Grounding Resistor (NGR) monitor — 48 VDC supply, IEC 61850 & USB communications with dual SC-fibre option. Genuine Littelfuse equipment, stocked in Batam for fast delivery across Indonesia and Southeast Asia.
The Littelfuse SE-330AU-28-00 is a neutral grounding resistor (NGR) monitor and earthing-resistor protection relay designed for resistance-grounded AC systems. Supplied for 48 VDC operation (compatible with Littelfuse supply ranges), it continuously verifies neutral-to-earth resistance, neutral current and neutral-to-earth voltage. Ideal for protection relay and NGR monitoring duties in transformers, generators and distribution networks where IEC 61850 communication and fibre connectivity are required.
Key Features
- Continuous NGR monitoring: verifies neutral-to-earth resistance and detects open or degraded NER paths.
- Multi-parameter sensing: monitors neutral current, neutral-to-earth voltage and resistance for reliable earth-fault detection.
- Flexible communications: USB and IEC 61850 support with dual SC-fibre interface option for substation integration.
- Fail-safe relay outputs: selectable 2 Form A or 2 Form C contact configurations for alarm and trip signalling.
- Convenient reset options: front-panel switch plus remote normally-open contact for local or remote reset.
- Rugged protection: standard conformal coating and harmonic-filtering capability for industrial electrical environments.
Technical Specifications
| Manufacturer | Littelfuse |
|---|---|
| Commercial Reference | SE-330AU-28-00 |
| Component | Neutral Grounding Resistor Monitor (NGR monitor) |
| Supply Voltage | 48 VDC (compatible with Littelfuse ranges 28–52 V and 36–72 VDC options) |
| Communications | USB, IEC 61850; dual SC-fibre interface option |
| Relay Outputs | Fail-safe contacts: 2 Form A or 2 Form C |
| Reset | Front-panel switch and remote normally-open (N.O.) reset contact |
| Protection | Standard conformal coating; harmonic filtering capability |
Applications
Used for continuous earth-fault and NGR supervision on distribution transformers and generator neutrals, protection of low- and medium-voltage systems, industrial plants and substations, and integration into IEC 61850-based substation automation.
We supply genuine Littelfuse devices through authorized distribution channels from our Batam base, with fast delivery across Indonesia and Southeast Asia. Contact us for availability and request a quotation — competitive lead times and local support for your NGR monitoring needs.
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