No products in the cart.
Roll over image to zoom in
Littelfuse SE-330AU-23-00 NGR Monitor 48VDC Ethernet NO Relay
$5,171$6,205 (-17%)
Littelfuse SE-330AU-23-00 neutral grounding resistor monitor — 48 VDC capable, 4–20 mA analog output and Ethernet communications. Genuine Littelfuse protection relay for resistance-grounded systems, available from Batam with fast delivery across Indonesia and Southeast Asia.
The Littelfuse SE-330AU-23-00 is a neutral grounding resistor monitor (NER monitor) designed for resistance-grounded AC systems and generator neutrals. Rated for 28–52 VAC and 36–72 VDC (48 VDC option), it provides earth-fault and neutral-to-earth resistance supervision with adjustable ground-fault pickup (0.125–30 A) and 4–20 mA analog signalling. Typical uses include transformer and generator neutral monitoring, earth-fault protection and utility/distribution protection applications.
Key Features
- Continuous monitoring of neutral current, neutral-to-earth voltage and neutral-to-earth resistance
- Adjustable ground-fault trip level from 0.125 to 30 A for flexible protection
- Radio-frequency (RF) trip thresholds for different system voltages (wide ranges)
- 4–20 mA analog output plus USB and Ethernet communications for integration
- Auto/manual reset with front-panel switch or remote N.O. contact; conformally coated for harsh environments
- Fail-safe protection logic with standard protection device functions (IEEE 50G/50N/51G/51N/59N/86)
Technical Specifications
| Manufacturer | Littelfuse |
|---|---|
| Commercial Reference | SE-330AU-23-00 |
| Component | Neutral Grounding Resistor Monitor |
| Supply Voltage | 28–52 VAC, 36–72 VDC (48 VDC option) |
| Analog Output | 4–20 mA |
| Ground-Fault (GF) Trip Level | 0.125–30 A |
| RF Trip Levels | 20–2000 V (systems ≤5 kV); 100–10000 V (systems >5 kV) |
| RF Trip Time | 12 s |
| Communications | USB, Ethernet |
| Reset Options | Auto / Manual; front-panel switch or remote N.O. contact |
| Protection Functions | IEEE device numbers: 50G, 50N, 51G, 51N, 59N, 86 |
| Environmental | Conformal coating; suitable for resistance-grounded AC systems |
Applications
Monitor neutral-earthing resistors on power transformers and generators, supervise earth-faults in distribution networks, integrate into substation protection schemes for resistance-grounded systems, and provide status/trending via analog and network interfaces for industrial plants.
We supply genuine Littelfuse protection relays through authorized channels from our Batam base with fast delivery across Indonesia and Southeast Asia. Competitive pricing and local support — contact us to request a quotation for the SE-330AU-23-00.
Reviews
There are no reviews yet.