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G4400 analyzers consist of input primary current and voltage converters, analog-to-digital converters, microprocessor, electrically programmable memory. Saving data and programs is provided by non-volatile memory. Communication with a computer is carried out using digital interfaces. The G4400 analyzer is powered by voltage inputs or an external power supply.
The G4400 analyzers are produced in 3 main modifications G4410, G4420, G4430, which differ in the depth of registration of the measured parameters of the electrical network and the main SCEs, providing both the possibility of creating new AMRs and using them in existing systems. The G4400 analyzers allow direct connection to networks with nominal voltages up to 1000 V.
G4400 analyzers allow you to measure the amplitude and angular errors of measuring current and voltage transformers.
G4400 analyzers perform analog-to-digital conversion of instantaneous values of harmonic input signals with subsequent calculation of measured values from the received data array in accordance with the program. The measurement results are archived in the internal non-volatile memory of the G4400 analyzers. The storage time of the accumulated information when the power is turned off is not limited. The G4400 analyzers incorporate digital interfaces (RS485/RS422/RS232, USB 2.0, 8P8C (RJ-45)) to transfer information to external devices. ELCOM (Elspec proprietary protocol) communication protocols are supported; MODBUS RTU RS485/RS422/RS232 serial protocol; FTP (file transfer protocol); HTTP WEB interface; OPC DA server Telnet console protocol over TCP/IP and/or RS485/RS422/RS232; DNP 3 (over TCP/IP); MODBUS TCP/IP.
The G4400 analyzers provide oscillography, registration, storage of data coming directly from the ADC with subsequent transfer to a personal computer (PC):
The G4400 analyzers provide protection against unauthorized access to information and control. The G4400 analyzer has a multi-level password system that determines access to the respective modes of operation.
The relevance of the problem of ensuring the quality of electricity
Despite the fact that today electrical energy is a service, not a product, it, like a product, is characterized by such a criterion as quality. According to GOST 13109-97 "Quality standards for electrical energy in general-purpose power supply systems", indicators for the quality of electrical energy (EE) and standards for them are established. This GOST is intended to solve the problems associated with the control, accounting and analysis of the quality of electrical energy, as well as to help determine why the quality of electricity has deteriorated and whose fault it is.
The quality of EE determines the costs of consumers for its purchase, and also directly affects the quality of products, the production of which is sensitive to changes in the nominal parameters of the power supply network.
Industrial enterprises and energy companies are implementing pilot projects of monitoring systems for PQI (analysis and commercial accounting of PQI). This makes it possible to prepare for the introduction of the system services market at NOREM and reduce the costs associated with poor quality of electricity supply.
Examples of the impact of poor power quality on human health and equipment performance
Voltage deviation
Losses in power transformers
Increased insulation wear
Increased engine wear
Electricity overrun
Marriage in electrolysis, welding production
Dips and surges
Failures of technological processes (metallurgical plants, oil and gas pumping, CNC machines)
Computer failures (billing systems)
Deterioration of reliability indices of AIISCS
Harmonics
Eddy current losses in transformers and motors
Overheating and vibration of the rotor
Capacitor overheating
Losses in the neutral wire
Skin effect
Additional errors in AISKUE
Asymmetry
Rotor vibration
Fire from overheating in the neutral wire
Additional errors in AISKUE
Flicker. Frequency deviation
Engine vibrations
Staff overwork
"Frequency Avalanche"
Speed change
Heating of steel cores
TV picture distortion
Devices that today will help solve problems related to EE quality are EE quality analyzers. These devices are equally necessary for both specialists of energy sales organizations, inspectors of Energonadzor, and an energy specialist of any large enterprise. For large enterprises, solving EE quality problems is identifying the culprits of EE quality deterioration, the possibility of competent load distribution, solving other internal technical problems, and most importantly, this is one of the steps towards greater energy efficiency - one of the main factors of the enterprise's investment attractiveness.
G4400 (G4410, G4420, G4430) class A devices, designed to measure, record and evaluate the quality of electrical energy in accordance with GOST 13109-97 and with the requirements of European standards IEC 61000-4-30, IEC 61000-4-15 and EN 50160.
G4400 are used to measure the parameters of electrical networks in stationary and transient processes: when monitoring the condition of electrical installations, when examining the operating modes of electrical networks of power systems and enterprises, as well as during measurements during start-up and adjustment of various electric power units and automation devices.
The analyzers are designed to measure the parameters of three-phase networks using a 3/4-wire circuit, balanced or unbalanced electrical networks with simultaneous display, storage, and archiving of measured values for 1 year, with a resolution of 1024 sampling points per period.
Supported communication protocols:
ELCOM; MODBUS; PROFIBUS; RTU; RS-485/RS-422/RS-232; FTP HTTP; OPCDA; TCP/IP.
Scope of analyzers G4400:
energy audit of enterprises and consumers of electrical energy (energy audit);
certification of electrical energy;
technological control and performance analysis of relay protection circuits and control devices;
technological control and analysis of the quality of electrical energy;
complete set of metrological laboratories (including mobile ones); use as part of automated control systems and electricity metering (ASKUE) and transmission of measured or calculated parameters to the control room for control, metering and distribution of electrical energy, as well as in power grid load control systems.
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