ABB T5S630-PR221DS-LSI — 630 A molded case breaker for reliable feeder and incomer protection

The ABB Tmax T5S630 with PR221DS-LSI trip unit is a workhorse MCCB for medium-to-large distribution panels. From my experience, it fits nicely as a plant floor feeder, a chiller or pump main, or a compact incomer on an MCC where you need solid fault interruption without overbuilding the frame. You get the familiar ABB PR-series electronic protection—LSI (long-time, short-time, instantaneous)—so coordination and fine-tuning are straightforward during commissioning. You might notice that it drops into standard IEC panels with minimal fuss and, typically, no external power supply for the trip unit.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days
• Lead time: 1 week if in stock; no more than 1 month at the latest
• Payment: 50% advance; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• 630 A frame with adjustable LSI protection — PR221DS trip unit provides tunable long-time, short-time, and instantaneous settings for selective coordination.
• Class “S” breaking performance — typically up to 50 kA at 400/415 V AC for robust fault clearing in industrial panels (verify label for site voltage).
• Self-powered trip technology — no external auxiliary supply required in most cases, simplifying panel wiring.
• Compact T5 footprint — fits dense switchboards; common accessories and terminals are readily available.
• Straightforward commissioning — clear dials for Ir, Isd, and Ii make protection adjustments quick during FAT/SAT.
• Accessory ecosystem — add shunt trip, UVR, auxiliary contacts, or rotary handles as needed.
• IEC-compliant build — designed for IEC 60947-2 environments; derating guidance for higher ambient temperatures.

Technical Specifications

Related or Supporting Products

• ABB Tmax XT6 630 — modern alternative with Ekip trip units; adds metering and optional comms.
• ABB PR222DS / PR223DS — advanced trip units (LSIG) for enhanced protection and coordination options.
• Auxiliary contacts (e.g., S2C-H11/H20) — status and alarm indication for SCADA interlocks.
• Shunt trip & UVR (e.g., S2C-A1x / S2C-A2x) — remote tripping and safety interlocking.
• Terminal kits & phase barriers — clean termination for busbar or cable; improves creepage/clearance.
• Rotary handle & shaft kits — door-mounted operation, useful in MCCs and withdrawable racks.

Installation & Maintenance

One thing I appreciate is how predictable the T5 is during installation. Still, a few basics make the difference between “it works” and “it’s right”.

• Panel environment: Install in an IEC-compliant enclosure with adequate ventilation; allow front access for setting dials and terminals.
• Wiring & terminations: Use lugs/bars rated for 630 A. Torque to ABB’s table; re-torque after initial heat cycles. Keep phase separators where clearances are tight.
• Coordination: Set Ir/Isd/Ii per upstream/downstream devices. In many cases, a short-time delay avoids nuisance trips on motor starts.
• Safety: Apply full LOTO, verify absence of voltage, and use appropriate PPE. Check mechanical trip function before energization.
• Routine maintenance: Dust removal and visual inspection every 6–12 months. Thermographic scan on loaded systems is helpful. Function-test shunt/UVR and auxiliaries; confirm settings remain as documented.

Quality & Certifications

• Complies with IEC 60947-2
• CE marking; RoHS-conform construction
• Manufactured under ISO 9001 quality systems
• Manufacturer’s standard warranty typically 12 months; our coverage is 365 days