For Energy Providers
(Utilities, Municipals, ESPs, Independents, etc.)

• Improve Substation Automation Solutions
• Increase Power Distribution Reliability
• Record Faults/Time Protective Equipment
• Monitor Reliability of Breakers and Relays
• Shed or Shift Loads Quickly
• Identify and Manage Peak Demand
• Heighten Response Time to PQ Events
• Enhance Levels of Communication and Data Transmission

For Energy Consumers
(Industrial, Commercial, Government, etc.)

• Real Time PQ Monitoring and Analysis
• Efficiently Control/Manage Energy Consumption
• Improve Operational Efficiencies
• Increase Productivity/Reduce Downtime
• Optimize Loads/Extend Equipment Life
• Identify and Respond to PQ Events Quickly
• Avoid High Utility Penalties for Exceeding Usage

Real Time Readings & Waveform Display



Historical Trends for Any Parameter

EIG’s patented Accu-Measure™ Auto-calibration technology allows a field-mounted metering device to achieve precision accuracy and maintain the accuracy over temperature and time. This technique is unique to EIG and consists of precise measurement technology and high precision internal reference standards.

Accu-Measure™ Technology features:
• 8 Independent High-Powered 16 Bit A/D Converters.
• Dual Internal References for periodic Auto-calibration.
• Internal temperature sensor to sense deviations in instrument temperature.
• Designed to allow for repeatable and consistent energy measurement results.

Benefits of Auto-Calibrating Technology:
• Improves accuracy over temperature.
• Improves repeatabilty, reducing meter settling time.
• Improves long-term stability.
• Relies on precision internal DC references to maintain accuracy.

Multipart Approach to Precision in Accuracy
The Nexus 1500 meter utilizes EIG’s Accu-measure™ technology, a technique based on a multipart approach that allows a field-mounted metering device to achieve laboratory accuracy.

The Nexus 1500 meter is equipped with EIG’s exclusive V-Switch™ technology, which enables meter upgrades in the field without removing the meter from service.
Nexus 1500 V-Switch™ keys include:
• V1: Standard Nexus 1500 meter with 128 Meg memory + 512 samples per cycle
• V2: V1 + 1 Gig total memory + 1024 samples per cycle
• V3: V2 + 10MHz Transient Recording

16 Bit Waveform and Fault Recorder
The unit records up to 1024 samples per cycle for an event with 10MHz voltage transient sampling. Voltage and current are recorded with pre- and post-event analysis. Fault recording offers 8x full scale capture capability. All voltage and current readings are recorded using a 16 bit A/D converter providing precise waveform resolution. Both hardware and software triggers are available to activate a waveform recording, which can be used for power quality surveys, fault analysis, breaker timing, etc.

High-Speed Status Input Triggers
Waveforms are recorded at time of status change. Input change and waveform recording are time-stamped to a 1msec resolution.

EN61000-4-15 Flicker Meter
Flicker compliant with EN61000-4-15 standard. Operates on both 220 Volt/50 Hz and 120Volt/50Hz voltages throughout standard test points.

Subcycle Transient Recorder
The Nexus 1500 meter is equipped with 4 independent 10MHz analog to digital converters that measure transient samples 10 million times per second.
The unit records subcycle transients on voltage and current readings. It monitors switching noise from capacitors, static transfer switches, SCRs and many other “power quality harmful” devices. Transients are often the cause of intermittent and expensive periods of downtime. Without the Nexus 1500 meter, solving these problems is often impossible.

Independent ITIC/CBEMA Log Plotting
Quickly view total surges, sags, and average duration in the independent ITIC/CBEMA log.

Phasor Analysis
The monitor provides a phase angle analysis between the voltage and current channels, allowing for efficiency and system-integrity analysis.

Virtually Unlimited Historical Trending Logs
The Nexus 1500 meter is equipped with vast amounts of memory. A user can partition this memory for log storage by setting up both the number of logs and the number of parameters per log. Up to 8 historical logs can be created with up to 64 parameters per log. With such extensive memory, the meter can log for years.

Out Of Limit Log
The unit offers an independent out of limit log. This allows a user to download out of limit information to obtain a sequence of events for any occurrence. Utilizing the 1msec clock resolution, the logs can be combined with different metered points throughout a distribution system to provide an accurate system-wide depiction of a power disturbance.

Event-Triggered Waveform Recording Log
The Nexus 1500 meter records waveforms with a resolution of up to 1024 samples per cycle. The amount of waveform recording is based on the amount of memory installed.
The unit records the waveform when a value goes out of limit and when the value returns to normal. All information is time-stamped to the nearest 1msec. The 8 onboard High-Speed Inputs can be tied to the waveform recording. Record when a breaker tripped as compared to when the relay activated. This is very useful for fault and breaker integrity analysis.
The unit can be programmed to take more than one recording every time an event occurs. Thousands of cycles can be recorded per event.

ITIC/CBEMA Log
The Nexus 1500 meter stores a separate CBEMA log that records magnitude and duration of voltage and current surges and sags for every power quality event. This allows the user to conduct real time CBEMA analysis without downloading all stored waveforms. The separate CBEMA log also allows the unit to provide a more comprehensive picture of power quality over time.

System Events Log
The Nexus 1500 meter logs extensive usage information for detection of unauthorized access. The unit records:
• Resets
• Programming changes
• Password Access Changes
• Time Changes
• Power Up / Power Down
• Change of Firmware

Input Status Log
This log allows the user to record when the internal inputs change status.

Uploadable Flash Memory
The Nexus 1500 meter utilizes uploadable flash memory technology on all processors and DSPs located in the unit. This insures that the unit can be upgraded without removing it from service.

Set Limit Control
The Nexus 1500 power monitor provides programmable setpoints for user settings. This feature allows a user to configure the meter to be used as a control device for many applications such as:
• Capacitor Control
• Load Shedding
• Automatic Transfer Schemes
• Transformer Monitoring & Control
• Redundant Protection (Not designed for Primary Over-Current Protection)
• Many Other Control Functions

Waveform / Transient Logs
The Nexus 1500 can log waveform, utilizing its programmable memory for all surges, sags and transients within the scope of what it sees. Thousands of events can be logged with resolution up to 1024 samples per cycle and transients at 10MHz resolution.

Custom Allocatable Memory Structure
A user can custom define log sizes within the meter. Thus the full memory can be allocated specifically to the desired function. With EIG technology, the meter can be configured optimally for your application.

Standard Communications:
• 100BaseT Ethernet RJ45 Port
• ANSI Optical Port
• Front cover USB port

Optional RS485 and Second Ethernet Port:
• Two identical built-in serial ports: Up to 115K baud.
• Standard protocols include Modbus RTU/ASCII and DNP 3.0 Level 2.
• Also available, second Ethernet port, either RJ45 or Fiber Optic.

8 Built-In Digital High-Speed Status Inputs:
• Inputs automatically sense whether the circuit is externally wetted.
• If externally wetted, input up to 300V DC is accepted.
• If internally wetted, the meter supplies the necessary voltage for the control application.

Sync. Check-Aux. Volt Input —High-speed Vaux input can be used for:
• Neutral to ground.
• Voltage readings.
• Synchronizing schemes.
• Obtaining the frequency, magnitude, and phase angle on both sides of a switch, or between generator and bus voltage.

The Nexus 1500 meter features an LCD color display with touch screen capability. The display uses bright TFT glass with a high temperature and long life LED backlight. LED is superior to CCFL solutions due to better temperature and half-life specifications. Screen displays include:

EN61000-4-15 Flicker and Compliance Monitoring
It is important to maintain a source of high quality power to insure efficient operations. One particular source of disturbance that can have very negative effects is Flicker. Flicker consists of low frequency (less than 24 Hz) to intermittent line disturbances on the power line. Aside from effects on equipment, disturbances of this type can have negative effects on people.

One particular example of this is the flickering of light sources that can affect humans in different ways, depending on the severity.

The Nexus 1500 meter complies fully with the Flicker requirements of EN61000-4-15 and includes:

- Flicker Evaluation-Instantaneous readings suitable for online monitoring; Short Term Readings (PST - 10 Min)

- Logging and monitoring - Long Term Readings (PLT - 4 hour) - logging and monitoring

- Polling - Pinst, Pst, Pst Max, Pst Min, Plt, Plt Max, Plt Min values

- Log Viewer (View graphed values Pst and Plt for Va, Vb and Vc or displayed values including Max and Min.)

The 10/100BaseT design allows the unit to speak with 12 simultaneous sockets of Modbus TCP. The standard 100BaseT Ethernet port allows multiple users to access meter data without any interface.

• 8 Simultaneous Sockets Of Modbus Over Ethernet Communication
• Multiple Sockets Means Multiple Users Or Software Systems Can Reach Meter Simultaneously