KONCAR - Model LA&P - Load Angle and Power Measurement System

One of the key parameters of the generator, in sense of control and stability protection, is the angle of the induced voltage internal to the generator (load angle). Current practice is to estimate this value using measurements from the terminals of the generator and mathematical models. Load Angle & Power System (LA&P) enables direct measurement of the generator load angle based on key phasor and electrical values measurement of the generator. Besides load angle measurement, LA&P system enables measurement of electrical values (active and reactive power, power factor, current and voltages).

• On-line analysis
• Protection
• Local/remote HMI
• Database (trends, waveforms …)

Architecture:

• Version I: Load angle and 3~ power measurement
• Eight channel acquisition unit with real time controller (load angle and power) (3 x voltages, 3 x currents, 1 x key phasor, 1 spare)
• Version II: Load angle and 1~ power measurement
• Four channel acquisition unit with real time controller (1 x voltage, 1 x current, 1 x key phasor, 1 spare)

Voltage input:

• Measuring range: 0 to ± 110 VAC (over voltage measurement transformer)
• Measuring error: < ± 0.5 % relative to full scale value
• Frequency range: up the 100 kHz
• Input filter limit frequency: 0 – 30.000 Hz
• Accuracy of Distributed Clocks: << 1 μs
• Rated isolation voltage: 2.500 V rms (surge withstand 5.000 V)

Current input:

• Measuring range: 0 to ± 1,5 A AC 3~ (usage of measuring transformers is recommended)
• Measuring error: 0.5 % relative to full scale value
• Frequency range: up the 100 kHz
• Input filter limit frequency: 0 – 30.000 Hz
• Accuracy of Distributed Clocks: << 1μs
• Rated isolation voltage: 2.500 V rms (surge withstand 5.000 V)

Kay phasor:

• Type: high sensitive infrared fork optical sensor
• Switching frequency: up to 500 kHz
• Load angle measurement accuracy: < 0,5 %
• Switching state indicator: yellow/green led
• Operating temperature range: -20°C to +70°C
• Size: 80x50x10, Aluminum housing IP67 (integrated electronics)
• Digital output: NPN/PNP

Digital/relay outputs:

• Number of outputs: 2 to 8
• Continuous current: 6 A
• Maximum switching power: 1500 VA
• Maximum switching voltage: 250 VAC/DC
• Maximum switching frequency: 0,1 Hz
• Rated isolation voltage: 300 V overload (category III) by EN 50178
• Surge withstand: 4 kV (1,25/50 μs), by IEC 5017

Analog outputs (number of outputs and configuration on request)

• Current outputs 0/4 - 20 mA, voltage outputs 0 - 10 V
• Number of outputs : 2 to 8

Communication:

• Ethernet 10/100
• Supported protocols: Modbus TCP slave, FTP server, IEC 60870-104, HTTP server (other on
• request)

Power supply:

• AC: 85 to 264 V , frequency 47 to 63 Hz, DC: 80 V to 370 V
• Maximum allowed power supply interruption: 100 ms for 230 VAC/ 20 ms for 115 VAC
• Test voltage: 3 kV (2 kV against ground)

Temperature range:

• Operational temperature range: -20°C to +70°C (-0°C to +55°C for touch screen version)
• Storage temperature range: -40° to +85°C

Dimensions:

• 19” installation – WHD: 482,5x177,5x250
• Cabinet IP 54 (IP 66 on request) – WHD: 300x300x200

Standards compliance:

• EMC immunity/emission : EN 61326-1 (IEC 61326-1:2005), EN 61000-3-2+A1+A2
• (IEC 61000-3-2+A1+A2), EN 61000-3-3 (IEC 61000-3-3), EN 61000-4-10+A1
• (IEC 61000-4-10+A1), EN 61000-4-12 (IEC 61000-4-12), EN 61000-4-18+A1
• (IEC 61000-4-18+A1)
• Vibration/shock resistance (EN 60068-2-6/EN 60068-2-27/29)