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Littelfuse SE-330AU-06-00 NGR Monitor Universal Dual RJ45 IEC 61850
$4,923$5,907 (-17%)
Littelfuse SE-330AU-06-00 neutral grounding resistor (NGR) monitor / protection relay. Conformally coated, fail-safe unit with 65–265 VAC / 85–275 VDC supply, IEC 61850 & USB communications, 4–20 mA output. Genuine Littelfuse, fast delivery from Batam.
The Littelfuse SE-330AU-06-00 is a neutral grounding resistor (NGR) monitor and earthing-resistor protection relay designed for resistance-grounded AC systems. This conformally coated, fail-safe protection relay accepts 65–265 VAC or 85–275 VDC supplies and detects ground-faults from 0.125–30 A with fast GF trip timing. It includes USB and IEC 61850 (RJ45) communication, 4–20 mA analog output and is ideal for transformers, generators, MV/LV distribution and IEC 61850-enabled substations.
Key Features
- Conformally coated relay housing for harsh environments and improved reliability.
- Fail-safe neutral grounding resistor (NGR) monitoring with continuous verification of NER integrity.
- Dual communications: USB interface plus IEC 61850 (RJ45) for substation integration.
- Analog 4–20 mA output and multiple relay contacts (2 Form A and 2 Form C) for control and signalling.
- Adjustable ground-fault trip range (0.125–30 A) with GF trip time 0.1–0.5 s; residual/fault (RF) trip timing 12 s.
- Standard harmonic filtering and front-panel switch / remote N.O. contact reset for flexible operation.
Technical Specifications
| Manufacturer | Littelfuse |
|---|---|
| Commercial Reference | SE-330AU-06-00 |
| Component | Neutral Grounding Resistor Monitor (NGR monitor) |
| Coating | Conformal coating |
| Contact Configuration | 2 Form A; 2 Form C |
| Supply Voltage | 65–265 VAC; 85–275 VDC |
| Operation Mode | Fail-safe |
| Reset Type | Front-panel switch / remote N.O. contact |
| Ground-Fault (GF) Trip Level | 0.125–30.0 A |
| GF Trip Time | 0.1–0.5 s |
| Residual/Fault (RF) Trip Level | 20–2000 V (systems ≤ 5 kV); 100–10000 V (systems > 5 kV) |
| RF Trip Time | 12 s |
| Analog Output | 4–20 mA |
| Communications | USB; IEC 61850 (RJ45) |
| Harmonic Filtering | Standard harmonic filtering |
Applications
Continuous monitoring of neutral-earthing resistors on transformers and generators; earth-fault protection in resistance-grounded MV/LV distribution; protection for industrial substations and power plants; integration into IEC 61850-enabled protection schemes.
We supply genuine Littelfuse protection relays through authorized channels from our Batam base with fast delivery across Indonesia and Southeast Asia. Competitive stock and lead times — contact us to request a quotation and confirm current availability.
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