Elspec Power Quality Analyzer

Features

Metered Values

• True RMS measurements
• Ultra rapid, real-time, cycle by cycle measurements, at 128 samples per cycle. Real-time values averaged over 8 through 256 cycles for easy reading
• Choice of models ranging from essential measurements only (Volts, currents, frequency and powers) to over 2000 electrical parameters
• Min/Max values
• Four quadrant readings (power, power factor)
• Displays neutral voltage and current

Time-of-Use (TOU)

• Time-of-Use information is automatically stored for each predefined period
• PowerIQ software calculates electricity costs according to varying tariffs (based on time, season etc.)

Power Quality

• Waveform display and capturing, at 128 samples per cycle
• Harmonics analysis, up to 63rd harmonic (individual, THD, K and crest factors)
• Sag/Swell recording (magnitude, duration and trigger events)

Compliance Monitoring

• Compliance monitoring of international power quality standards
• These monitoring operate on all product series (e.g. the harmonics level is tested even if the meter doesn’t include harmonics display)

Logging & Recording

• Up to 2048KB of flash memory
• High speed data recording for short duration critical events
• Logging of over 2000 parameters at scheduled intervals or by set-points
• Min/Max recording of key parameters
• Logging of setup changes, set-point and power quality events
• Precise timestamp synchronized to external GPS (optional)

Input, Output & Relays

• On board relay can be controlled automatically by internal set-points
• Optional 4 digital inputs and 2 outputs for multiple purposes, such as synchronization to utility meter or to generate energy pulsing (Wh, VArh and VAh)

Graphic Display & User Interface

• Extra large graphic LCD screen
• High visibility (FSTN technology)
• Bright Backlight
• Characters are displayed in varying sizes to enhance visibility from long distances
• The user interface offers an easy to use, installation and configuration menu driven operation

Communication

• Optional RS-485 or RS-232 communication port
• Supported protocols: ElCom protocol - Elspec’s unique ultra rapid communication protocol and ModBus RTU
• Baud rate of up to 115200 BPS
• Fully automated baud rate setup

Structure

• Allows easy adaptation of the unit to current and future requirements
• Easy upgrading of the firmware (internal software)

Network Types

• Supports any network connection configuration (3 and 4 Wire, Wye and Delta, single-phase etc.)
• Feeder transformer (or local generator) current and power analysis (see Applications section)

Software

• User-friendly PC software (PowerIQ)
• Includes on-line help for easy use

Applications

Network Types
The Power Analyzer supports any network connection configuration, such as 3 and 4 Wire, Wye and Delta, and single-phase. The connection is either direct (up to 347/600 VAC) or using a Potential Transformer (PT). Minimum burden on the Current Transformers (CTs) is achieved by connecting the CTs without a physical contact. Delta networks use 2 or 3 CT’s and Wye networks use 3 or 4 CT’s.

Feeder Transformer Analysis
When the system is configured as a Delta network, it displays the L-to-L current and power, in addition to the line currents and total power. The system measures the line current from the CTs and calculates the current and power inside the feeder transformer (or generator). In completely balanced networks, the internal currents are 1/v3 of the line currents. In many cases, the network is not balanced and the internal currents are different from these expected.

This can be explained with the following hypothetical example:
A transformer designed for a maximum current per phase of 2000A, therefore each internal line is designed for a maximum of 1155A (2000/v3). The network includes only one phase to phase load of 1900A between phases L1 and L2 and nothing on L3. The transformer appears incorrectly to have a 95% load (1900/2000). The currents are divided into 67% on L1-L2 line and 33% on L1-L3 and L3-L2 lines, resulting in 1267A on the L1-L2 line, and the transformer is overloaded by 10%.

Elspec’s unique L-to-L current and power algorithm displays this information, enabling maximum network monitoring.

Connection Diagrams

PowerIQ Software

General
This easy-to-use software displays the system’s status, as well as the measurement results on numerous screens running under Windows (95, 98, me, NT and 2000). PowerIQ integrates all Elspec systems, allowing power quality analysis, cost allocation, circuit optimization, demand & power factor monitoring. PowerIQ includes real-time measurements, as well as comprehensive data logging and power quality analysis features. All screens allow customization, printing and exporting of data. The network version enables complete intranet and Internet operation, as well as modem access.

Remote Control

Real-Time Measurements
Provides clearly visible real time values, with minimums and maximums.

Harmonics Analysis
Displays the harmonics spectrum both as a graph and as a table, in addition to harmonics analysis parameters (THD, K-Factor and Crest-Factor). Compliance monitoring of international power quality standards, such as IEEE-519, allows easy network analysis.

Scope
Displays waves and their phase shifting, and enables detection of existing or potential power quality problems.

Data Logging
Enables comprehensive network analysis by logging over 2000 parameters per record. It can be set to record data either on pre-defined intervals (from 1 cycle to 99 hours) or according to network events. The recording volume and time is limited only by the size of the computer’s hard disk.

Data Monitoring
Displays the recorded data in either on-line or off-line mode. The on-line mode displays the data while simultaneously recording it for maximum power analysis control.

Report Generator
Creates user-defined or preset reports (such as load profile and power quality) reports. The reports are easily defined using a word processor (such as Microsoft Word).

Time-of-Use (TOU)
Displays the Time-of-Use information stored in the analyzer, in addition to calculation of energy costs, according to virtually any utility tariff structure.

Events
The event screen is used for retrieving, monitoring and analyzing the events information from the analyzer.

Display Screens

Large Digit Screen
Permits simultaneous display of 9 parameters: 3 measured values plus 3 minimum and 3 maximum.

Parameters can be mixed, such as average voltage, current and power factor. This unique feature allows analysis of the foremost parameters at a glance, without touching the unit. The PU % buttons displays the values as a percentage from their nominal rating.

Waveform Screen
128 samples/cycle
This large graphic display allows easy monitoring of transients of 130/156µS (at 60/50Hz). The display includes detailed information for each wave: the type and phase, THD, RMS, peak & bottom values plus value at cursor position.

Harmonics Screen
63 harmonics
The graphic display enables inspection of the harmonics pollution at a glance. The display includes detailed information for each harmonic: type, phase, number of the harmonic, the value in amperes/volts and in percent, the angle and the frequency.

Ordering Information

Model Information