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Nexus 1252
Electro Industries Nexus 1252 Manuals
Manuals and User Guides for Electro Industries Nexus 1252. We have
1
Electro Industries Nexus 1252 manual available for free PDF download: Installation And Operation Manual
Electro Industries Nexus 1252 Installation And Operation Manual (154 pages)
High Performance SCADA Monitor
Brand:
Electro Industries
| Category:
Measuring Instruments
| Size: 1.85 MB
Table of Contents
Limitation of Warranty
4
Table of Contents
7
Chapter 1 : Three-Phase Power Measurement
11
Three-Phase System Configurations
11
1: Wye Connnection
11
2: Delta Connection
13
3: Blondell's Theorem and Three Phase Measurement
14
Power, Energy and Demand
16
Reactive Energy and Power Factor
18
Harmonic Distortion
20
Power Quality
23
Chapter 2: Nexus Overview
25
The Nexus System
25
DNP V3.00 Level 1 and Level 2
26
Flicker
26
INP2 Internal Modem with Dial-In/Dial-Out Option
27
1: Hardware Overview
27
2: Dial-In Function
27
3: Dial-Out Function
27
Total Web Solutions
28
1: Hardware Overview
28
2: Hardware Connection
28
Measurements and Calculations
30
Demand Integrators
34
Nexus External I/O Modules (Optional)
36
Nexus 1250/1252 Meter Specifications
37
Nexus P40N, P41N, P43N External Display Specifications
38
Nexus P60N Touch Screen Display Specifications
38
Chapter 3: Hardware Installation
39
Mounting the Nexus 1259/1252 Meter
39
Mounting the Nexus P60N Touch Screen External Display
42
Mounting the Nexus External I/O Modules
44
Chapter 4: Electrical Installation
47
Wiring the Monitored Inputs and Voltages
47
Fusing the Voltage Connections
47
Wiring the Monitored Inputs -Vref
47
Wiring the Monitored Inputs - Vaux
47
Wiring the Monitored Inputs - Currents
47
Isolating a CT Connection Reversal
48
Instrument Power Connections
48
Wiring Diagrams
49
Chapter 5 : Communication Wiring
59
Communication Overview
59
RS-232 Connection-Nexus Meter to a Computer
63
RS-485 Connection- Nexus Meter to a Computer or PLC
66
RJ-45 Connection- Nexus with Internal Network Option to Multiple Pc's
66
RS-485 Connection- Nexus to an RS-485 Master (Unicom or Modem Manager)
67
1: Using the Unicom 2500
67
Communication Ports on the Nexus I/O Modules
71
RS-485 Connection-Nexus Meter to Nexus I/O Modules
72
Steps to Determine Power Needed
73
I/O Modules' Factory Settings and VA Ratings
73
Linking Multiple Nexus Devices in Series
74
Networking Groups of Nexus Meters
75
Remote Communication Overview
76
Programming Modems for Remote Communication
80
Selected Modem Strings
81
High Speed Inputs Connection
81
Five Modes of Time Synchronization
82
IRIG-B Connections
83
Chapter 6: Using the Nexus External Displays
85
Overview
85
1: Connect Multiple Displays
86
2: Nexus P40N Modes
86
Dynamic Readings Mode
87
Navigational Map of Dynamic Readings Mode
89
Nexus Information Mode
90
Navigational Map of Nexus Information Mode
91
Display Features Mode
92
Navigational Map of Display Features Mode
93
Nexus P60N Touch Screen External Display
94
Navigational Map for P60N Touch Screen External Display
102
Chapter 7: Transformer Loss Compensation
103
Introduction
103
Nexus 1250/1252 Transformer Loss Compensation
105
1: Loss Compensation in Three Element Installations
106
1: Three Element Loss Compensation Worksheet
107
Chapter 8 : Nexus Time-Of-Use
111
Introduction
111
The Nexus TOU Calendar
111
TOU Prior Season and Month
112
Updating, Retrieving and Replacing TOU Calendars
112
Daylight Savings and Demand
112
Chapter 9: Nexus External I/O Modules
113
Hardware Overview
113
1: Port Overview
114
Installing Nexus External I/O Modules
115
1: Power Source for I/O Modules
116
Using PSIO with Multiple I/O Modules
117
1: Steps for Attaching Multiple I/O Modules
117
Factory Settings and Reset Button
118
Analog Transducer Signal Output Modules
119
1: Overview
119
2: Normal Mode
120
Analog Input Modules
121
1: Overview
121
2: Normal Mode
122
Digital Dry Contact Relay Output (Form C) Module
123
1: Overview
123
2: Communication
124
3: Normal Mode
124
Digital Solid State Pulse Output (KYZ) Module
125
1: Overview
125
2: Communication
126
3: Normal Mode
126
Digital Status Input Module
127
1: Overview
127
2: Communication
127
3: Normal Mode
128
Specifications
128
Chapter 10 : Nexus Monitorwith INP2 - Internal Modem Option
129
Hardware Overview
129
Hardware Connection
130
Dial-Out Function
130
Hardware Overview
131
Hardware Connection
133
Chapter 11 : Nexus Monitorwith Internal Network Option
135
Chapter 12: Flicker
135
Overview
135
Theory of Operation
135
Setup
137
Software - User Interface
138
Logging
141
Polling
141
Log Viewer
141
Performance Notes
142
Appendix A Transformer Loss Compensation Excel Spreadsheet with Examples
143
A.1: Calculating Values
143
A.2: Excel Spreadsheet with Example Numbers
143
Glossary Glossary
149
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