Technical Parameters Category Specification Product Series PSR - Digital Protection Relay Device Type Modular Motor Management Relay / Intelligent Motor Protector Key Standards IEC 60255, IEC 60947, ANSI/IEEE C37.90, IEC 61850 (with module) Rated Auxiliary Supply 48–250 V DC / 48–240 V AC, 50/60 Hz (Auto-sensing, suffix -70) Current Input (CT Secondary) 1 A or 5 A (Configurable, 1 A nominal shown by -600- code) Measurement Accuracy Current: ±1% of reading; Voltage: ±0.5% of reading; Power: ±2% of reading Core Protection Functions • Thermal Model (49) Dual thermal models (running/stationary), adjustable overload curve, thermal alarm (e.g., 95%), trip (100%). • Short Circuit (50/51) Phase instantaneous (I>) & time-delayed overcurrent (I>>) with IDMT/DT curves. • Stall / Prolonged Start (48/14) Separate start thermal model, adjustable stall time setting. • Phase Unbalance (46) Negative sequence protection (% of Iavg), trip delay. • Earth Fault (50N/51N/67N) Residual (calculated) or core-balance (measured) current. Instantaneous or time-delayed, directional option. • Underload / Jam (37) Minimum current or power protection. • Under/Overvoltage (27/59) Two-stage with timers. • Under/Overfrequency (81) • Restart Inhibit / Starts per Hour Programmable number of starts and minimum time between starts. Control & Logic • Integrated PLC Engine Graphical logic editor (PSRsoft) for custom control sequences, interlocks, timers, counters. • Pre-defined Control Profiles Direct-on-Line (DOL), Reversing, Star-Delta, Soft Starter, Pump, Valve, etc. Inputs/Outputs (Base + Expandable) • Binary Inputs (Discrete Inputs) 6 x 24-250V DC/AC programmable inputs (base unit). Expandable via I/O modules. • Output Relays 5 x changeover (CO) relays (base unit: Trip, 2x Alarm, 2x Programmable). Expandable. • Analog Inputs Optional module for 0/4-20 mA or PT100 temperature inputs. Human-Machine Interface • Display High-contrast graphical LCD with backlight (128 x 64 pixels). • Indicators 10+ multi-color LEDs (Power, Ready, Run, Trip, Alarm, Comms, etc.). • Navigation 6 tactile keys (Menu, Up, Down, Enter, Escape, Reset). Monitoring & Diagnostics • Measured Values Il1, Il2, Il3, Iavg, I_neg, I_earth, Vll, Vln, Freq, P, Q, S, PF, kWh, kVARh, Thermal Capacity, Starts Count, Run Hours. • Event Recorder 512 time-stamped events (trips, alarms, commands, system events). • Oscillography (Disturbance Recorder) 8 analog channels (currents/voltages), pre- and post-trigger recording. Communication • Front Port USB for local configuration (PSRsoft) and event log extraction. • Rear Communication Slots 2 independent slots for plug-in modules: - Protocols: Modbus RTU (RS485), Profibus DP, DeviceNet, IEC 61850, Modbus TCP/IP (Ethernet). - I/O Expanders: Additional digital/analog I/O modules. Clock & Synchronization Internal real-time clock; optional IRIG-B or SNTP (via comm module) for time sync. Environmental • Operating Temperature -25°C to +70°C • Storage Temperature -40°C to +85°C • Relative Humidity 5% to 95%, non-condensing • Protection Rating IP40 (front), IP20 (terminals) Mechanical • Housing Self-extinguishing plastic (UL94 V-0), modular design. • Mounting Panel-mounted (flush), requires cutout. • Dimensions (W x H x D) 144 mm x 144 mm x 122 mm (6 TE width). • Weight Approx. 1.2 kg (base unit). Certifications CE, UL, cUL, DNV GL, ATEX (optional), IECEx (optional).