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SE-330 Neutral-Grounding-Resistor Monitor Rev. 9-A-112913
TABLE OF CONTENTS
PAGE
1. General ................................................................... 1
1.1 Modern Resistance-Grounded Systems ................... 1
1.2 SE-330 NGR Monitoring ......................................... 1
2. Operation ................................................................ 2
2.1 Settings .................................................................... 2
2.1.1 GF Trip Time ................................................ 2
2.1.2 GF Trip Level ............................................... 2
2.1.3 V
N
Trip Level ............................................... 2
2.1.4 Pulse-Period Adjustment .............................. 3
2.1.5 Configuration Settings .................................. 3
2.1.5.1 Relay K1 Function (S1) ................... 4
2.1.5.2 Trip-Relay Mode and
Trip Memory Mode(S2) ............................... 4
2.1.5.3 Ground-Fault-Trip Latch (S3) .......... 4
2.1.5.4 Resistor-Fault-Trip Latch (S4) ......... 4
2.1.5.5 Sensing-Resistor Selection (S5) ....... 4
2.1.5.6 Frequency (S6) ................................. 4
2.1.5.7 Spare (S7) ........................................ 4
2.1.5.8 Upgrade Enable (S8) ........................ 4
2.2 Calibration ............................................................... 4
2.3 Pulsing Operation .................................................... 4
2.4 Trip Indication and Reset ......................................... 5
2.5 Remote Operation .................................................... 5
2.6 Relay K1 LED ......................................................... 5
2.7 Unit Healthy Output ................................................ 5
2.8 Diagnostic LED ....................................................... 5
2.9 Analog Output ......................................................... 6
3. Installation .............................................................. 6
3.1 SE-330 ..................................................................... 6
3.2 Sensing Resistor..................................................... 12
3.3 Ground-Fault CT ................................................... 20
3.4 Isolated Ground Connection .................................. 24
3.5 Pulsing Connection ................................................ 25
4. Communications .................................................. 25
4.1 Local Communications Port .................................. 25
4.1.1 Local Data Acquisition ............................... 25
4.1.2 Local Communications Commands ............ 25
4.1.3 Firmware Upgrade ...................................... 25
4.2 Network Communications ..................................... 25
5. Troubleshooting ................................................... 26
6. Technical Specifications ...................................... 27
6.1 SE-330 ................................................................... 27
6.2 Sensing Resistors ................................................... 28
6.3 Current Sensors ...................................................... 29
7. Ordering Information ......................................... 29
PAGE
8 Warranty ............................................................... 30
9 Test Procedures .................................................... 31
9.1 Resistor-Fault Tests ................................................ 31
9.1.1 Calibration and Open Test .......................... 31
9.1.2 Voltage Test ............................................... 31
9.2 Sensing-Resistor Test ............................................. 31
9.3 Analog-Output Test ................................................ 31
9.4 Ground-Fault Performance Test ............................. 32
L
IST OF FIGURES
FIGURE PAGE
1 Configuration Switches ............................................ 3
2 Analog-Output Connections ..................................... 6
3 SE-330 Connection Diagram .................................... 7
4 SE-330 Outline and Panel-Mounting Details ........... 8
5 SE-330 Outline and Surface-Mounting Details ........ 9
6 SE-IP65CVR-G Weatherproof Cover Outline ....... 10
7 SE-IP65CVR-G Weatherproof Cover Installation . 11
8 ER-600VC Sensing Resistor .................................. 12
9 SE-MRE-600 Moisture-Resistant Enclosure Outline 13
10 SE-MRE-600 with installed ER-600VC ................... 14
11 ER-5KV Sensing Resistor ...................................... 15
12 ER-5WP Sensing Resistor ...................................... 16
13 ER-15KV Sensing Resistor .................................... 17
14 ER-25KV Sensing Resistor .................................... 18
15 ER-35KV Sensing Resistor .................................... 19
16 EFCT-1 Ground-Fault Current Sensor ................... 21
17 SE-CS30-70 Ground-Fault Current Sensor ............ 22
18 EFCT-26 and SE-CS30-26 Ground-
Fault Current Sensors ......................................... 23
19 RK-332 Remote Indication and Reset .................... 24
20 Simplified Isolated-Ground Connection ................. 24
21 Simplified Pulsing Connection ............................... 25
22 Ground-Fault-Test Circuits .................................... 33
LIST OF TABLES
TABLE PAGE
1 Typical Values for Tripping Systems ....................... 3
2 Ground-Fault Trip Levels for Selected CT’s ............ 3
3 RS-232 DB-9 Terminals ......................................... 25
4 Ground-Fault-Test Record ...................................... 33
DISCLAIMER
Specifications are subject to change without notice.
Littelfuse Startco is not liable for contingent or
consequential damages, or for expenses sustained as a result
of incorrect application, incorrect adjustment, or a
malfunction.
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