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Littelfuse SE-330HV-28-00 NGR Monitor 48VDC Dual SC Fiber IEC 61850 NO
$5,222$6,266 (-17%)
Littelfuse SE-330HV-28-00 Neutral Grounding Resistor (NGR) monitor — HV ground-fault protection relay with 28–52 VAC / 36–72 VDC supply and adjustable 2–100% pickup. Genuine Littelfuse product with fast delivery across Indonesia & Southeast Asia from Batam.
The Littelfuse SE-330HV-28-00 is a high-voltage Neutral Grounding Resistor (NGR) monitor and ground-fault protection relay designed for HV distribution and substation use. It supports 28–52 VAC and 36–72 VDC supplies (including 48 VDC systems), offers adjustable ground-fault pickup (2–100% of CT primary) and 0.1–10.0 s trip timing, and includes options for IEC 61850 communications—ideal for substations, generator neutrals and industrial power networks requiring reliable NGR supervision.
Key Features
- Continuous NGR monitoring with rapid detection of shorted or failed resistor to reduce transient overvoltage risk.
- 2 Form A and 2 Form C programmable contacts for flexible trip and auxiliary signaling.
- Adjustable ground-fault pickup (2–100% of CT primary) and adjustable trip delay (0.1–10.0 s) for secure coordination.
- Supply compatibility 28–52 VAC and 36–72 VDC (suitable for 48 VDC installations); latching or autoreset modes available.
- Analog 4–20 mA output plus optional communications including USB and IEC 61850 for integration into protection systems.
- Conformal coating and harmonic filtering for robust operation in industrial and utility environments.
Technical Specifications
| Manufacturer | Littelfuse |
|---|---|
| Commercial Reference | SE-330HV-28-00 |
| Component | Neutral Grounding Resistor Monitor |
| Supply Voltage | 28–52 VAC; 36–72 VDC (compatible with 48 VDC systems) |
| Contacts | 2 Form A and 2 Form C (programmable) |
| Ground-Fault Pickup | Adjustable 2–100% of CT primary |
| Ground-Fault Trip Time | Adjustable 0.1–10.0 s |
| Residual Fault (RF) Trip Level | 100–10,000 V (systems ≤35 kV); 200–20,000 V (up to 72 kV) |
| Analog Output | 4–20 mA |
| Communications | USB; optional IEC 61850 |
| Modes / Reset | Latching or autoreset; front-panel or remote N.O. reset |
| Additional | Conformal coating; harmonic filtering; universal CT compatibility |
Applications
Continuous NGR monitoring in HV substations; neutral protection on generator and transformer neutrals; industrial distribution networks requiring ground-fault detection and coordination; backup protection on utility feeders where IEC 61850 integration or analog supervision is needed.
We supply genuine Littelfuse protection relays through authorized channels from our Batam base, delivering across Indonesia and Southeast Asia. Competitive lead times and local support make us a reliable source for SE-330HV-28-00 units — contact us to request a quotation or confirm availability.
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