Scope of application
The Line Protection Relays MLPR-610Hb microcomputer line protection and monitoring device applies to the ungrounded systems or systems grounded via resistor with voltage ratings of below 66kV. It can also be used as a current voltage protection and monitoring device in 110kV grounded systems.
1. Protective function
3-step compounded voltage block directional overcurrent protection (Three-step OC) Inverse time overcurrent protection (IT Overcurrent) 3-phase zero sequence voltage block zero sequence overcurrent directional protection (ZS Overcurrent ) Zero sequence overvoltage protection(ZS Overvoltage) Overload protection (Overload) Under frequency unloading protection (Under-frequency) Auto reclosing Later Instantaneous Trip (Later Inst.Trip) PT failure Under voltage protection (Undervoltage) Bus charging protection Non-electric quantity protection(2-way)(Non-electric) (Can be selected or not) Synchronous Closing(Sync. Closing)2. Auxiliary function
Harmonic spectrum analysis Phase display Low current line selection Fault recorder Integral energy and pulse energy(Pulse energy can be selected or not) Self-checking fault alarm of device Remote calling and modification of protection’s settings Fault recorder One or two ways programmable output of 4~20mA Provide ethernet print function(manual print setting value, manual/auto print reports) (Can be selected or not).3. Monitoring function
Electric quantity (remote measuring quantity):voltage, current, active power, reactive power, active energy, reactive energy, power factor, grid frequency, non-electric quantity measuring(Can be selected or not), etc. Remote binary quantity: the device has 15-way binary input, in which: 12-way for external gathering, and 3-way for internal gathering.4. Communication capability
2 standard RS485 multipoint communication ports 2 industrial ethernet ports (Can be selected or not) Supports single, dual network communication, it is fully qualified for network redundancy and backup IEC-60870-5-103(RS485 communication mode),IEC-60870-5-104(industrial ethernet mode) standard communication protocol(Can be selected or not)5. GPS clock synchronization function (Can be selected or not)
The device is able to receive GPS clock minute synchronization (or second synchronization) through RS485 differentiate voltage, and it can be done with monitoring system to accomplish GPS precise clock synchronization.
Wanlida Line Protection Relays