Parameter Category Specification Product Family / Type Numerical Motor Protection and Control Relay (Motor Management System) Standard Compliance IEC 60255, IEC 60947-1, -4, -5, IEC 61850 (with module) Rated Auxiliary Supply Voltage (Us) 48 - 250 V DC / 48 - 240 V AC, 50/60 Hz (Auto-ranging, -70 suffix) Motor Current Input (CT Secondary) 1 A or 5 A (Configurable) Protection Functions • Thermal Overload (49) Dual (separate) thermal models for Running and Stopped states. Includes cooling time constants, service factor, and bi-metallic compensation. • Short Circuit / Instant OC (50) Instantaneous phase and earth-fault. • Start-up Supervision / Stall (48/14) Anti-stall protection with separate thermal model for starts. Start time monitoring. • Phase Unbalance & Loss (46) Negative sequence current protection with high sensitivity. • Earth-Fault (50N/51N/67N) Directional or Non-directional, residual or core balance measurement. Multiple stages. • Underload / Jam (37) Underpower or mechanical jam protection. • Under/Overvoltage (27/59) • Under/Overfrequency (81) • Number of Starts Control of successive starts and restart inhibition time. Control & Logic Features • Integrated PLC Programmable logic (PSRsoft software) for custom control sequences, interlocking, and automation. • Standard Control Profiles Direct-on-line (DOL), Star-Delta, Soft Starter, Pump, Valve control, etc. • I/O Expansion Modular slots for additional digital/analog input & output modules. Measured & Calculated Values Phase & ground currents, voltages, frequency, power (P, Q, S), power factor, energy, motor thermal capacity, starts counter, running hours. Human-Machine Interface (HMI) Large backlit graphical LCD with status, measurements, bar graphs, event log. 6 navigation keys. 9+ LED indicators. Event Logging & Oscillography Stores time-tagged fault records, alarms, operations. Optional disturbance recorder (oscillography) for pre-/post-fault current waveforms. Output Contacts • Base Unit Relays Typically 4-6 programmable changeover (CO) relays (Trip, Alarm, Control outputs). • Expandable Via additional I/O modules. Binary Inputs • Base Unit Typically 4-6 programmable digital inputs. • Expandable Via additional I/O modules (including analog inputs). Communication (Standard & Optional) • Standard Port RS485 (Modbus RTU protocol). • Plug-in Modules Supports IEC 61850, Profibus DP, DeviceNet, Modbus TCP/IP (Ethernet), CANopen. Operating Temperature -25°C to +60°C (-13°F to +140°F) Housing & Mounting Modular plastic case for panel mounting. Width varies with configuration (base unit + modules). Dimensions (Base Unit, W x H x D) Approximately 144mm x 144mm x 122mm (6TE width).