ABB SP382-TS – Protection/Control Module for Feeder and Motor Applications

The ABB SP382-TS is a compact protection/control module that, in many cases, is deployed in feeder and motor panels where reliable overcurrent and earth-fault protection are needed alongside simple automation I/O and serial communications. From my experience, this model fits well in brownfield upgrades or like-for-like replacements because wiring, setup, and commissioning tend to be straightforward. You might notice that it balances essential protection functions with practical integration options (typically RS‑485), which keeps lifecycle costs under control without overcomplicating the job.

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Key Features

• Feeder/Motor Protection Toolkit: Typically supports 3‑phase overcurrent and earth‑fault elements with configurable curves and definite time settings.
• Flexible Auxiliary Supply: Versions commonly available for 24 VDC or wide‑range 80–265 VAC/DC, which makes retrofits easier.
• CT/VT Compatibility: Current inputs usually accept 1 A or 5 A CT secondaries; voltage inputs sized for standard protection VT levels.
• Binary I/O for Automation: Practical mix of digital inputs and relay outputs to interface with trip coils, lockout relays, and alarms.
• Event and Fault Records: Time‑stamped logs help technicians diagnose trips without guessing. One thing I appreciate is the clear event sequence.
• Serial Communications: RS‑485 is typical, with SPA‑bus or Modbus RTU in many cases; some variants support IEC 60870‑5‑103 for SCADA.
• Panel-Mount Form Factor: Compact flush mounting keeps front panels tidy and serviceable.

Technical Specifications

Related or Supporting Products

• ABB SPAJ 140 C: Classic overcurrent and earth‑fault protection relay; commonly used as a feeder protection baseline.
• ABB REF615: Modern IEC 61850 feeder protection with richer logic and Ethernet; often chosen as a next‑gen replacement.
• ABB REM615: Motor protection with advanced thermal models and condition monitoring; a step up if you need deeper motor diagnostics.
• ABB RTXP 18 Test Switch: Handy for safe secondary injection and isolation during relay testing; reduces outage time.
• Supporting Components: Protection‑grade CTs/VTs, RS‑485 gateways (to Ethernet), 24 VDC UPS for auxiliary supply buffering.

Quick field note from a site engineer: “We swapped in the SP382‑TS on an older motor feeder panel; settings transfer was quick and the RS‑485 link came up first try. We kept the original CTs—no drama.”

Installation & Maintenance

• Panel/Cabinet: Use a clean, ventilated enclosure; maintain clearance for heat dissipation. Avoid direct vibration and moisture ingress.
• Wiring Practices: Separate CT/VT leads from control wiring; use shielded twisted pair for RS‑485; earth shields at a single point.
• CT Safety: Always short CT secondaries before disconnecting the relay. This is non‑negotiable, and in most cases it’s the step that prevents damage.
• Commissioning: Verify ratio/polarity, apply secondary injection to confirm pickup/dropout and time curves; check binary I/O logic against drawings.
• Routine Care: Annual or semi‑annual functional test; clean ventilation slots; back up settings after any change; apply firmware updates when available.
• Spare Strategy: Keep one pre‑configured spare in stock. It seems to be the fastest way to cut downtime during outages.

Quality & Certifications

• Certifications: CE compliant; RoHS conformant; many ABB protection devices are UL recognized and manufactured under ISO 9001 quality systems.
• Warranty: 365‑day warranty coverage as standard with our orders.