Littelfuse SE-330AU, Руководство пользователя

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Page ii
SE-330AU Neutral-Earthing-Resistor Monitor
Rev. 4-I-101817
T
ABLE OF
C
ONTENTS
S
ECTION
P
AGE
1 General ................................................................. 1
1.1 Modern Resistance-Earthed Systems .................... 1
1.2 SE-330AU NER Monitoring ................................. 1
2 Operation .............................................................. 2
2.1 Settings .................................................................. 2
2.1.1 EF Trip Time .............................................. 2
2.1.2 EF Trip Level ............................................. 2
2.1.3 V
N
Trip Level ............................................. 2
2.1.4 Configuration Settings ............................... 2
2.1.4.1 Earth-Fault-Trip Latch (S3) .......... 2
2.1.4.2 Resistor-Fault-Trip Latch (S4) ...... 2
2.1.4.3 Sensing-Resistor Selection (S5) .... 3
2.1.4.4 Frequency (S6) .............................. 3
2.1.4.5 Upgrade Mode (S8) ....................... 3
2.1.5 Resistor-Fault Trip Time ............................ 3
2.1.6 Resistor-Fault Trip Level ........................... 3
2.1.7 Geo-Magnetic Filter ................................... 3
2.2 Calibration ............................................................. 3
2.3 CT Detection ......................................................... 3
2.4 Trip Indication and Reset ...................................... 4
2.5 Remote Operation .................................................. 4
2.6 Relay K1 LED ....................................................... 4
2.7 Unit Healthy Output .............................................. 4
2.8 Diagnostic LED ..................................................... 4
2.9 Analog Output ....................................................... 4
3 Installation ............................................................ 6
3.1 SE-330AU ............................................................. 6
3.2 Sensing Resistor .................................................... 6
3.3 Earth-Fault CT ....................................................... 6
3.4 Isolated Earth Connection ................................... 24
4 Data Interfaces ................................................... 25
4.1 SD Card ............................................................... 25
4.1.1 Datalogging .............................................. 25
4.1.2 Firmware Upgrade ................................... 25
4.2 USB Interface ...................................................... 25
4.3 Network Communications ................................... 25
5 Troubleshooting ................................................. 26
6 Technical Specifications .................................... 28
6.1 SE-330AU ........................................................... 28
6.2 Sensing Resistors ................................................. 30
6.3 Current Sensors ................................................... 31
7 Ordering Information ....................................... 31
8 Warranty ............................................................ 32
9 Test Procedures .................................................. 33
9.1 Resistor-Fault Tests ............................................. 33
9.1.1 Calibration and Open Test ....................... 33
9.1.2 Voltage Test ............................................. 33
9.2 Sensing-Resistor Test .......................................... 33
9.3 Analog-Output Test ............................................. 33
9.4 Earth-Fault Performance Test .............................. 34
Appendix A SE-330AU Revision History ................... 35
L
IST OF
F
IGURES
F
IGURE
P
AGE
1
Configuration Switches ......................................... 3
2 Analog-Output Connections .................................. 4
3 SE-330AU Connection Diagram ........................... 7
4 SE-330AU Outline and Panel-Mounting Details .. 8
5 SE-330AU 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
......... 13
10
ER-600VC Installed in SE-MRE-600
................... 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 Earth-Fault Current Sensor .................... 20
17 SE-CS30-70 Earth-Fault Current Sensor ............. 21
18 EFCT-26 and SE-CS30-26 Earth-Fault
Current Sensors ................................................... 22
19 RK-332 Remote Indication and Reset ................. 23
20 PGA-0520 Analog Percent Current Meter .......... 23
21 Simplified Isolated-Earth Connection ................. 24
22 Earth-Fault-Test Circuits ..................................... 34
L
IST OF
T
ABLES
T
ABLE
P
AGE
1
Typical Values for Tripping Systems .................... 5
2 Earth-Fault-Test Record ...................................... 34
D
ISCLAIMER
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.