Protection set

Main features

• Under Frequency Load Shedding automation
• Load Restoration after Under Frequency Load Shedding automation
• Voltage interlocking of frequency-based protection
• four-inputs (Un=100V) or three-inputs (Un=400V) measuring system
• different types and variants depending on configuration
• measurment of analog input values
• real time clock
• event recorder with capacity up to 500 records
• last disturbance parameters recorder
• samples or magnitudes of disturbance and logic states recorder
• Tripped currents counter
• Two binary inputs for cooperation with external protection purposes, possibility to be used as blocking inputs
• Trip impulse
• alphanumeric LCD display (2×16) and six buttons enabling operation of the relay
• visual indication (by LED diodes) of pick-ups and trips, exceeding of counters or proper operation of relay
• 7 programmable relay outputs (S1-S7)
• RS-485 port for communication with PC computer or supervision and control system (MODBUS-RTU protocol)
• self-test system of proper operation of relay control
• enclosure construction enables three types of mounting: 35 mm rail, surface mount or flush mount

Energising values are measured input voltages: UL1, UL2, UL3, U₀ and calculated values of positive-sequence of three phase voltage (U1), negative-sequence of three phase voltage (U2) and frequency. If one of measured or calculated values exceed the threshold value set by the user, the relay operates according to configuration.

Communication interface provides measured and calculated electrical values, binary inputs and outputs states and saved records. The manufacturer provides PC software allowing to set the relay, confirm signals, graphical display of measured values and browse records.

TECHNICAL DATA