e
Electro Industries/GaugeTech
Doc #: E107-7-06-121
viii
List of Figures
List of Figures
Chapter 1: Basic Tutorial on AC Power Measurement
Figure 1.1: Single Phase Power Systems . . . . . . . . . . . . . . . . . . . . . . . 1-1
Figure 1.2: Relationships Between Apparent, Real and Reactive Power . . . . . . . . . . 1-2
Figure 1.3: Three Phase Power Systems . . . . . . . . . . . . . . . . . . . . . . . 1-2
Figure 1.4: Poly Phase Power Systems . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Chapter 2: Nexus Overview
Figure 2.1: The Nexus System . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Chapter 3: Hardware Installation
Figure 3.1: Nexus Monitor Mounting Diagram, Top View . . . . . . . . . . . . . . . 3-1
Figure 3.2: Nexus Monitor Mounting Diagram, Side View . . . . . . . . . . . . . . . 3-2
Figure 3.3: Nexus P40N LED External Display Mounting Diagrams . . . . . . . . . . . 3-3
Figure 3.4: Nexus P60N Touch Screen Display Mounting Diagrams . . . . . . . . . . . 3-4
Figure 3.5: Nexus P60N Touch Screen Display Back Detail . . . . . . . . . . . . . . . 3-4
Figure 3.6: Cutout for Nexus P60N Touch Screen Display . . . . . . . . . . . . . . . 3-5
Figure 3.7: Nexus P60N Touch Screen Display Bezel Mounting Diagram . . . . . . . . . 3-5
Figure 3.8: Nexus I/O Modules Mounting Diagram, Overhead View . . . . . . . . . . . 3-6
Figure 3.9: Nexus I/O Module Communication Ports . . . . . . . . . . . . . . . . . . 3-6
Figure 3.10: Nexus I/O Modules Mounting Diagram, Front View . . . . . . . . . . . . 3-7
Chapter 4: Electrical Installation
Figure 4.1: 4-Wire Wye, 3-Element Direct Voltage with 4 CTs . . . . . . . . . . . . . 4-4
Figure 4.2: 4-Wire Wye, 3-Element with 3 PTs and 4 CTs . . . . . . . . . . . . . . . 4-5
Figure 4.3: 3-Wire, 2-Element Open Delta with 2 PTs and 3 CTs . . . . . . . . . . . . 4-6
Figure 4.4: 3-Wire, 2-Element Open Delta with 2 PT and 2 CTs . . . . . . . . . . . . . 4-7
Figure 4.5: 3-Wire, 2-Element Delta Direct Voltage with 3 CTs . . . . . . . . . . . . . 4-8
Figure 4.6: 3-Phase, 4-Wire Wye, 2.5 Element with 2 PTs and 3 CTs . . . . . . . . . . . 4-9
Figure 4.7: 4-Wire, 3-Element Grounded Delta with 4 CTs
. . . . . . . . . . . . . . 4-10
Chapter 5: Communication Wiring
Figure 5.1: Communication Overview . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Figure 5.2: RJ-11 Communication with Internal Modem Option . . . . . . . . . . . . . 5-2
Figure 5.3: RJ-45 Communication with Internal Network Option . . . . . . . . . . . . 5-3
Figure 5.4: Communication Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Figure 5.5: Nexus Port 1—RS-232/RS-485 Communication
. . . . . . . . . . . . . . 5-5
Figure 5.6: Nexus RS-485 Port (Ports 1–4) . . . . . . . . . . . . . . . . . . . . . . 5-6
Figure 5.7: Straight Line and Loop Topologies . . . . . . . . . . . . . . . . . . . . 5-7
Figure 5.8: Incorrect “T” and “Star” Topologies . . . . . . . . . . . . . . . . . . . . 5-8
Figure 5.9: Nexus Monitor Connected to an RS-485 Master . . . . . . . . . . . . . . 5-10
Figure 5.10: Nexus Monitor Connected to Nexus P40N External Display . . . . . . . . 5-11
Figure 5.11: Nexus Monitor Connected to Nexus P60N Touch Screen Display . . . . . . 5-12
Figure 5.12: Communication Ports on the Nexus I/O Modules . . . . . . . . . . . . . 5-13
Figure 5.13: Nexus Monitor Connected to Nexus I/O Module . . . . . . . . . . . . . 5-14
Summary of Contents for Nexus 1250
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