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The ABB OTM32F4C20D380C is a high-precision, smart feeder protection relay belonging to the OTM (Optimax) series, specifically part of the OTM32 product line. This series is engineered for comprehensive protection, control, and monitoring of medium-voltage (MV) distribution feeders in utility, industrial, and commercial power networks. The complex product code defines its exact hardware and functional configuration.
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Parameters Category Parameter Specification / Interpretation for OTM32F4C20D380C General Product Series OTM32 (Optimax Series) Device Level Feeder Protection & Control IED Housing 4U high, 19-inch rack or panel mounting (for "F" variant) Power Supply Operational Voltage 48-110 V DC or 110-230 V DC (Interpreted from "C20") Power Consumption Typically < 30 W Analog Inputs Current Inputs (Iₙ) 1 A or 5 A (Secondary, defined by order code) Thermal Withstand Continuous: 4 x Iₙ; 1s: 100 x Iₙ Voltage Inputs (Uₙ) 100/110 V or 200/220 V line-to-neutral (via VTs) Digital I/O Binary Inputs (BI) Typically 24+ (Optically isolated, configurable voltage) Binary Outputs (BO/PO) Typically 16+ (Mix of fast trip and signal relays) HMI Display Large Graphical LCD (High-resolution, for "D" variant) Interface Front keypad, USB port for configuration. Communication Primary Protocol IEC 61850-8-1 (Edition 2) (MMS & GOOSE) Secondary Protocols DNP3 (TCP/IP & Serial), Modbus TCP/RTU, IEC 60870-5-103 Ports 2+ Ethernet ports (RJ45 & ST), 2+ RS485 serial ports. Protection Functions Core ANSI Functions 67/67N (Dir. OC/EF), 50/51/51N, 27/59, 79 (Recloser), 25 (Sync), 49, 81U/81O, 50BF (CB Fail) Advanced Functions Fault Locator, Load Profile, Demand Management, THD Measurement. Metering & Records Measurements I, V, P, Q, S, PF, F, Energy (Wh, VAh), Harmonics. Class 0.5/1.0. Recording Oscillographic FR (≥ 128 samples/cycle), SOE (≥ 1024 events), Trip Log. Logic & Control Programmability CFC (IEC 61131-3) & Sequence Control Environmental Operating Temperature -25°C to +70°C (Standard) Protection Degree IP52 (Front), IP20 (Terminals) Standards Compliance IEC 60255, IEC 61850, IEEE C37.90, IEC 61000-4 (EMC)
