WXD2300 series microcomputer protection and monitoring device is suitable for relay protection, measurement and control of power plants and substations with voltage levels of 110KV and below. The device combines protection, measurement and operational control functions. It can be installed in the switchgear in situ or in a centralized screen. It can be used for both DC power supply operation loops and AC power supply operation loops. The device adopts Chinese liquid crystal display, the human-machine interface is friendly and easy to operate; the high-resolution sampling chip has high precision and accurate measurement; high reliability design and perfect self-checking function. The device is guaranteed to operate reliably; the device also has Ethernet, CAN, RS485 and other communication interfaces to facilitate communication with various systems and other intelligent devices.
The device is suitable for power plants and substations of 110KV and below. Its functions include power transformer protection, line protection, bus protection, capacitor protection, standby power supply, motor protection, PT protection, etc.
The device can collect measured voltage, current, frequency, active power, reactive power and power factor in real time.
The device is equipped with 16-channel switch interface, which can be used to collect the switch position of the circuit breaker position contact, the knife gate position contact, the protection plate contact, and the external lock contact.
he device can receive the remote remote command to perform the opening and closing control operation of the circuit breaker. The circuit breaker can also be manually opened and closed by the device keyboard menu operation.
The device provides an open circuit named “Lock Remote Control”, which can be connected to the external “remote/local” switch position contact to achieve remote lock operation. When the switch is in the "local" position, the remote control and remote control closing commands sent by the communication are prohibited. When the switch is in the "remote" position, the remote control and remote control are sent by the communication. The order is allowed to be executed.
By default, the device is connected to the “local” location switch of the “remote/local” switch. When the site does need to access the “remote” position contact, the “locked remote control can be reversed” control in the fixed value item. Word input to achieve the same blocking function. The unit can be used for DC power control loops as well as for AC power control loops. The external terminal block definitions of the device are different in both cases, please refer to the attached drawing.
The modification of the protection value and the retraction of the protection function can be performed remotely from a remote location.
Event reporting function
The device has an event report recording function, which can save the report of the important event generated, and the report is not lost after the device is powered off.
Events include action events, alarm events, and remote signaling displacement events. The storage of device events is cyclic, that is, when the latest event report is saved, the oldest event is automatically deleted.
The content of the action event report is the type of protection in which the device generates a protection action, the time at which the protection action occurs, and the amount of failure data at the time of the protection action.
The content of the alarm event report is the type of protection that the device generates a protection alarm and the time when the protection alarm occurs. And the name and time of the fault when the device self-test finds the fault.
The content of the remote signal displacement event report is the time when the device's opening amount is displaced and the state after the displacement.
Various incident reports can be manually deleted manually.
Fault recording function
The device has a fault recording function, which can record and save the fault amount when the system fails, and the recorded data is 8 cycles of real-time sampling data. The recorded data can be transmitted from the communication interface to the upper computer monitoring system, and the recorded data and waveform can be displayed in the monitoring system software.
The device can save the fault recording report of the last 4 times of protection device action, and the recorded data is not lost after the device power is turned off.