ALSTOM P442 PDF
Download: MiCOM P44x Order Form Cortec Configurator P P P P P P – Easergy MiCOM P44x. Alstom Generator Protection relay Micom P (Numerical relay),Alstom- Transmission-P,MiCOM Agile P, P & P (Distance Protection Systems). MiCOM P, P and P Numerical Full Scheme Distance Relays . range of protection functions listed in the table, the P, P and.
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Where the negative phase sequence element is required to operate for specific uncleared asymmetric faults, a precise threshold setting would have to be based upon an individual fault analysis for that particular system due to the complexities involved. Using programmable scheme logic, the user can readily change alsom default direct-action pushbutton functions and LED indications to fit specific control and operational needs.
Agile P, P and P distance protection – Manuals
The start-up of the high-speed algorithms will zlstom confirmed if U AND I are detected on three consecutive samples. This in turn dictates the need for high speed protection to reduce overall fault clearance times.
This can be used over one of three physical links: If the lower cover is secured with a wire seal, this will need to be removed. Display the Windows Print dialog, enabling you to print the current diagram. Four settings apply to the rear port using Modbus which are described below.
With Kbus or ModBus comms, the relay attempts to limit the alstok on memory space by saving the analogue data in compressed format whenever possible. Central to the MiCOM concept is flexibility.
The derivatives of the currents are used to eliminate the effects of the DC current component.
Micom P442 Numerical Distance Protection Relays
All internal communication of data from the power supply board is conducted via the output relay board which is connected to the parallel bus. The levels of access are summarised in Table 2. The serial bus carrying the sample data is also connected to the co-processor board, using the processors built-in serial port, as on the main processor board. There are two options available in the relay menu: It follows then, that the residual voltage generated by an earth fault on an insulated system will be the highest possible value 3 x phase-neutral voltageas the zero sequence source impedance is infinite.
P442 Areva Distance Relay
The power supply board also provides the RS electrical connection for the rear communication port. Using the side flanges of the transparent cover, pull the bottom edge away from the relay front panel until it is clear of alsto seal tab.
If the remote relay has also detected a forward fault, then it will operate with no additional delay upon receipt of this signal. The RS interface is used with the relays rear communication port to provide communication using one of either Courier, Modbus or IEC altom.
It is possible to apply a negative phase sequence overcurrent relay to detect the above condition. Please enter full name. The boards and modules use a multi-point earthing strategy to improve the immunity to external noise and minimise the effect of circuit noise.
Of the three connections, two are for the signal connection, and the other is for the earth p44 of the cable.
From this, it can be aldtom that when a conductor open circuit occurs, current from the positive sequence network will be series injected into the negative and zero sequence networks across the break. The following altom shows the relay menu for the Broken Conductor protection, including the available setting ranges and factory defaults: For example, the system services software controls the boot of the relays software from the non-volatile flash EPROM memory at power-on, and provides driver software for the user interface via the LCD and keypad, and via the serial communication ports.
When negative sequence polarising is used, the relay requires that the Characteristic Angle is set. If an extender card is used, this should not be inserted or withdrawn from the equipment whilst it is energized. One group of protection settings is selected as the active group, and is used by the protection elements.
The equipment should be disposed of in a safe manner. The access level enabled by the password entry will time-out independently for each interface after a period of inactivity and revert to the default level. Only two settings apply to the rear port using Courier, the relays address and the inactivity timer. Two stages are provided. This element provides separate alarm and trip thresholds.
Optical power meters should be used to determine the operation or signal level of the device. For changes to protection settings and disturbance recorder settings, the platform software operates a scratchpad in SRAM memory.