SE-330HV Neutral-Grounding-Resistor Monitor
Functions:
- Detects neutral-grounding-resistor failure - NGR failure will render current-sensing ground-fault protection inoperative
- Detects ground faults
- Data logging with PC software
Features:
- Continuously measures NGR resistance
- Wide set-point ranges - compatible with any neutral-connected NGR up to 72-kV system voltage
- Calibrates to NGR resistance
- 4-20 mA output for earth-leakage metering
- DFT (harmonic) filter prevents false operation
- Trip delay to coordinate with downstream ground-fault relays
- Standard RS-232 interface
- Optional DeviceNet, PROFIBUS, and Ethernet communications
- Four output relays for control and indication
- Conforms to CSA Standard M421-00 Use of Electricity in Mines
- Free SE-MON330 PC-interface software
- Conformally coated circuit boards
- Five year warranty
Manuals:
- SE-330HV Manual (rev. 2)
- SE-330/SE-330AU/SE-330HV DeviceNet Manual
- SE-330/SE-330AU/SE-330HV Ethernet Manual
- SE-330/SE-330AU/SE-330HV Profibus-DP Manual
Typical Applications:
- Resistance-grounded transformers and generators in processing, manufacturing, chemical, mining, forestry, petroleum, and water treatment facilities
- Tripping and alarm-only resistance-grounded systems, including overhead line and pulsing-ground-fault applications
- Compatible with very high and very low resistor values
- NGR monitoring is recommended for all resistance-grounded systems
Minimum System Components:
- The SE-330HV requires a current transformer and a sensing resistor (ER-15KV, ER-25KV, ER-35KV, or ER-72KV).
- Outdoor Sensing Resistor Applications
IEEE Device Numbers:
3GC, 50G, 50N, 51G, 51N, 59N, 86
Remote Indication and Reset Assembly
Remote indication and reset for the SE-330, SE-330AU, and SE-330HV. NEMA 4 and NEMA 13 rating. Standard 22-mm mounting.
Data Sheet
Protective Cover
Allows relays to be used in a wet and dusty environment. Provides IP65 protection for the SE-13X- and SE-330-series relays, as well as the SE-400.
Current Transformer
Current transformer used to detect phase or ground-fault current.
CAD Drawing
Tech Notes
Earth-Fault Current Transformer
Sensitive current transformer used to detect ground-fault current. EFCT-1FC flux conditioner available.
Current Sensor
Current sensor used to detect ground-fault current.
Earth-Fault Current Transformer
Sensitive current transformer used to detect ground-fault current. Flux conditioner not required.
EFCT Flux Conditioner
Helps prevent saturation when installed in the EFCT-1 window.
EFCT Flux Conditioner
Dimensions: EFCT-1FC has a 70-mm (2.75") ID window.
Used with: EFCT-1
Used with: EFCT-1
Current Sensor
Current sensor used to detect ground-fault current.
1-kV Sensing Resistor
Used with the SE-330HV to continuously monitor a low-voltage very-high-resistance neutral-grounding resistor.
15-kV Sensing Resistor
Used with the SE-325, SE-330, SE-330AU, and SE-330HV to continuously monitor the continuity of a neutral-grounding resistor on systems up to 15 kVac.
15-kV Sensing Resistor
35-kV Sensing Resistor
Used with the SE-330, SE-330AU, and SE-330HV to continuously monitor the continuity of a neutral-grounding resistor on systems up to 35 kVac.
Moisture Resistant Enclosure Kit
Moisture-resistant enclosure specifically designed for the ER-600VC and ER-1000HV, which protects the connection terminals from snow and rain in outdoor applications.
25-kV Sensing Resistor
Used with the SE-325, SE-330, SE-330AU, and SE-330HV to continuously monitor the continuity of a neutral-grounding resistor on systems up to 25 kVac.
25-kV Sensing Resistor
72-kV Sensing Resistor
Used with the SE-330HV to continuously monitor the continuity of a neutral-grounding resistor on systems up to 72 kVac.