Protection set

Main features

• 4 measuring inputs
• 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

On the basis of three measured phase currents, the negative-sequence of current is calculated which is the value of current unbalance. Exceeding of any set threshold value causes the reaction of the relay according to the 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