Parameters Category Parameter Specification for OT800E03P General Type Self-Powered, Draw-Out, Electromechanical IDMT Overcurrent Relay Standard Function Inverse Definite Minimum Time (IDMT) Phase Overcurrent (ANSI 51) Auxiliary Supply None Required Input Circuit Rated Frequency 50 Hz or 60 Hz Continuous Thermal Current 10 A (CT Secondary), 15 A permissible for short periods. Burden (At Setting) Approx. 4.0 to 12 VA (Varies significantly with tap setting and model). Higher than OT630. Instantaneous Withstand Up to 500 A for 0.5s (CT secondary). Settings Plug Setting (PS) / Tap Range Common Ranges: Low Range: 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.2, 1.5, 1.75, 2.0 A High Range: 2.0, 2.5, 3.0, 3.5, 4.0, 5.0, 6.0, 7.0, 8.0 A Time Multiplier (TMS) Typically 0.1 to 1.0 (or 0.05 to 1.0 on some models). Time-Current Characteristic ("03") Manufacturer-specific curve. Code "03" corresponds to a defined curve (e.g., Normal Inverse) in ABB's catalog. Must be verified from official tables. Output Contacts Contact Configuration DTL (Dynamically Trip-Locked): One normally-open (NO) trip contact (mechanically latched), one normally-closed (NC) alarm contact. Contact Rating (Trip Contact) Make & Carry: 30 A for 3 seconds. Break (DC Inductive): 0.25 A at 250V, L/R=40ms (50W). Break (AC): 5 A at 250V, cos φ=0.4. Contact Rating (Alarm Contact) 5 A, 250 V AC/DC (continuous). Mechanical Operation Indicators Two Flags: Red (Trip - Latched), Yellow (Disk Start). Reset Manual push-button (resets trip mechanism and red flag). Case Style Draw-Out Case (E-style) for test isolation. Mounting Panel mounting in a dedicated draw-out cradle. Accuracy & Performance Operating Time Accuracy Within ±7.5% of theoretical curve at TMS=1.0 (typical high-grade performance). Reset Time Approx. 6-15 seconds to 90% reset, depending on model and overload. Overshoot Time Minimal (< 50 ms typical). Environmental Operating Temperature -25°C to +55°C (Standard). Vibration & Shock Designed for severe substation conditions. Standards Compliance IEC 60255-3, IEEE/ANSI C37.90.