| |
Functions:
Detects neutral-grounding-resistor failure - NGR failure renders current-sensing ground-fault protection inoperative
Detects ground faults
Controls pulsing-ground-fault system
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
Meets the requiremens of the Pennsylvania Bureau of Mine Safety
Conforms to AS/NZS 2081.3:2002
Free SE-MON330 PC-interface software
Conformally coated circuit boards
Five year warranty
Typical Applications:
Resistance-earthed transformers and generators in mining facilities
NER monitoring is recommended for all resistance-earthed systems
The SE-330AU performs the series-neutral earth-leakage protection required by AS/NZS 2081.3:2002 and increases system reliability by also monitoring NER continuity
Minimum System Components:
The SE-330AU requires an EFCT-series or SE-CS30-series current transformer and a sensing resistor (ER-600VC, ER-5KV, ER-15KV, ER-25KV, or ER-35KV).
Outdoor Sensing Resistor Applications
|
| 
