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Littelfuse SE-330HV-21-01 NGR Monitor HV LVPS DeviceNet
$5,851
Littelfuse SE-330HV-21-01 NGR monitor — conformal-coated neutral grounding resistor monitor with supply options 28–52 VDC and 36–72 VDC, ground-fault and NGR-short detection, DeviceNet communications and configurable outputs. Genuine Littelfuse stock with fast delivery from Batam across Indonesia & Southeast Asia.
Part number Littelfuse SE-330HV-21-01 is a conformally coated Neutral Grounding Resistor (NGR) monitor built for resistance-grounded AC systems. It offers selectable supply voltage options (28–52 VDC and 36–72 VDC), adjustable sensitivity and ground-fault trip timing, continuous NGR and ground-fault detection, DeviceNet communications and configurable relay outputs. This protection relay is suited to substations, industrial power distribution, generator neutral supervision and motor-control protection applications.
Key Features
- Conformal-coated module for enhanced corrosion and contamination resistance in harsh environments.
- Continuous monitoring detects NGR shorts and ground faults to reduce transient overvoltage risk.
- Adjustable pickup 2–100% (1% increments) for precise sensitivity and false-trip avoidance.
- Ground-fault trip delay adjustable 0.1–10.0 s for coordination with upstream protection.
- Analog 4–20 mA output plus an optional pulsing output (SE-330 models) for remote monitoring and integration.
- DeviceNet communications with programmable relay outputs; selectable fail-safe or non fail-safe operation.
Technical Specifications
| Manufacturer | Littelfuse |
|---|---|
| Commercial Reference | SE-330HV-21-01 |
| Component | Neutral Grounding Resistor Monitor (NGR monitor) |
| Supply voltage (options) | 28–52 VDC; 36–72 VDC |
| Adjustable pickup | 2–100% (1% steps) |
| Ground-fault trip delay | 0.1–10.0 s |
| Analog output | 4–20 mA |
| Pulsing output | Pulsing output (SE-330 models) |
| Communications | DeviceNet |
| CT compatibility | Universal CT compatibility |
| Coating | Conformal coating |
| Other features | Standard harmonic filtering; RF trip level options; programmable relay outputs; selectable fail-safe/non fail-safe |
| Reset options | Range of reset options |
Applications
Used for neutral-ground monitoring in resistance-grounded networks, substation ground-fault protection, industrial power distribution panels, generator neutral supervision, and integration into motor control centres and switchgear communications.
All Littelfuse SE-330HV-21-01 units are genuine and supplied through authorized channels. Wulan Dari operates from Batam and offers fast delivery across Indonesia and Southeast Asia. Contact us to request a quotation, confirm availability and arrange technical support.
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