U<ANSI 27
Undervoltage protection
Trips when the voltage falls below the setting.
Protection relays
AMR relay
- Current and voltage inputs as needed
- Digital input and output as needed
- Large touch screen
- RS232 and RS485 ports
- Support for IEC 61850 communication protocol
IEC 61850
communication protocol
RS232 · RS485
serial ports
Touch
large touch screen
Protective functions
U>ANSI 59
Overvoltage protection
Trips when the voltage rises above the setting.
I>> / I>ANSI 50/51
Non-directional overcurrent protection
Instantaneous (50) and IDMT time-delayed (51) tripping on overcurrent and short circuit.
IE>> / IE>ANSI 50N/51N
Non-directional grounding protection
Instantaneous and time-delayed protection against residual current and phase-to-earth faults.
I> →ANSI 67
Directional overcurrent protection
Overcurrent that checks the power direction, operating only for forward or reverse faults.
IE> →ANSI 67N
Directional Grounding Protection
Directional earth fault, for ring networks and parallel feeders.
I2>ANSI 46
Negative component overcurrent protection
Detects unbalance, broken conductors and single phasing from the negative-sequence current.
θ>ANSI 49
Overload protection
A thermal model of the plant that trips before a cable, transformer or motor overheats.
CBFANSI 50BF
Key failure protection
Trips the upstream breakers when a breaker fails to open after a trip command.
I> ↑CLP
cold load detection function (CLP)
Raises the settings for a while after a long-dead feeder is re-energised, avoiding nuisance trips.
I2f / I1fInrush
Inrush current detection function
Recognises transformer inrush from the second harmonic and blocks false trips.
Id>ANSI 87
Differential protection
Compares the currents into and out of the plant and clears faults inside the zone fast.
Software features
01It has a powerful and easy-to-use software environment for setting up various functions
02Ability to record up to 200 oscillographs, trip log
03Has 4 regulatory groups
04Signal Routing software module for assigning function signals to relay inputs and outputs
05Ability to output relay settings in XRio format
Relay certificates
- Power Research Institute