The PQA-1 44 is an instrument that can be used as a Power Quality Analyzer to support 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.

When the system is configured as a Delta network, it displays the L-to-L current and power, in additional 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/Φ 3 of the line currents. In many cases,, the network is not balanced and the internal currents are different from these expected.

• True RMS measurements

• Ultra rapid. real-time, cycle by cycle measurements, at 128 samples per cycle. Real-time values 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

• Mm/Max values

• Four quadrant readings (power, power factor)

• Displays neutral voltage and current

• Time-of-Use information is automatically stored for each predefined period

• PowerlQ software calculates electricity costs according to varying tariffs (based on time, season etc.)

• Waveform display and capturing, at 128 samples per cycle

• Harmonics analysis, up to 63^rd harmonic (individual, THD, K and crest factors)

• Sag/Swell recording (magnitude, duration and trigger events)

• 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)

 

• Up to 2048KB of flash memory

• High speed data recording for short duration critical events

• Logging ol over 2000 parameters at scheduled intervals or by set-points

• Mm/Max recording of key parameters

• Logging of setup changes, set-point and power quality events

• Precise timestamp synchronized to external GPS (optional)

• On hoard 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)

• Extra large graphic I CD 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

• Optional RS-485 or RS-232 communication port

• Supported protocol: ElCom protocol - Rudolf’s unique ultra rapid communication protocol and ModBus RTU

• Baud rate of up to 115200 BPS

• Fully automated baud rate setup

• Allows easy adaptation of the unit to current and future requirements

• Easy upgrading of the firmwave (internal software)

• Supports any network connection configuration (3 and 4 Wire, Wye arid Delta, single-phase etc.)

• Feeder transformer (or local generator) current and power analysis (see Applications section)

• Unique dual load model enables simultaneous analysis of two loads such as parallel-connected transformers, or mains plus additional load (e.g., large motor, welder, capacitor bank)

• User-friendly PC software (PowerIQ)