ABB MS495 1SAM550000R1008 Manual Motor Starter

ABB MS495 1SAM550000R1008 – Stop the Clock on Your Downtime. Ship Today.

Every minute a motor circuit sits dead, your line bleeds money. The ABB MS495 (1SAM550000R1008) is a heavy-duty manual motor starter rated for the punishment of real industrial environments — and we keep verified stock in Xiamen, ready to move the same day you call. No lead-time negotiation. No factory backorder excuses. You need the part; we ship the part.

Whether you’re staring at a tripped motor protection circuit on a water treatment pump, a conveyor drive that won’t reset, or a compressor panel that’s been dark since last night’s fault — this is the unit that gets you back online. We’ve supplied MS495 series starters to maintenance teams across Southeast Asia, the Middle East, and Europe under emergency conditions. We know what urgency looks like, and we’re built for it.

⚡ URGENT REQUIREMENT? Contact: [email protected] | WhatsApp: +86 18359268345

Quick Technical Datasheet

Troubleshooting & Replacement Tips

Pulled from real field scenarios. These are the failure modes and swap pitfalls that catch engineers off guard on the MS495:

1. Thermal Memory Effect After Trip
The MS495 uses a bimetal thermal overload element. After a sustained overload trip, the bimetal retains heat — attempting a manual reset within 2–3 minutes of trip will fail or result in immediate re-trip. Wait for the bimetal to cool (typically 5–10 minutes in ambient conditions) before resetting. If the motor re-trips within seconds of reset, the fault is upstream — check motor winding resistance and insulation before condemning the starter.

2. Current Setting Dial — Match Before You Mount
The MS495 ships with the current adjustment dial at mid-range. Before energizing, rotate the dial to match the motor’s rated full-load current (FLA) from the motor nameplate. A mismatch of even 10–15% will cause nuisance trips under normal load or, worse, fail to protect against a genuine overload. Lock the dial with the tamper-evident seal once set.

3. Auxiliary Contact Block Orientation
If you’re replacing a unit that had auxiliary contacts (for remote fault signaling or PLC input), verify the contact block part number before ordering. The MS495 accepts snap-on auxiliary contact blocks — but the NC/NO configuration and terminal numbering differ between the MS495 and the smaller MS450/MS325 series. Swapping the wrong block will invert your fault logic silently.

4. Phase Sequence and Wiring Torque
Re-torque all line and load terminals to ABB’s specified values (typically 4–6 Nm for the MS495 frame). Loose terminals are the #1 cause of premature thermal trips and contact erosion in high-current starters. Use a calibrated torque screwdriver — not feel.

5. Common Fault Codes on Upstream PLCs
If the MS495 is wired into a Siemens S7 or ABB AC500 PLC via its auxiliary contact, a trip will typically surface as a digital input fault (e.g., DI channel goes LOW when NC contact opens). If your HMI shows a persistent “Motor Protection Fault” or “Starter Trip” alarm that won’t clear after reset, confirm the auxiliary contact has physically re-closed — use a multimeter across terminals 95-96 (NC) before chasing software.

6. Replacing In-Line Without Full Panel Shutdown
If a live swap is operationally required (not recommended but understood in critical process environments): isolate the upstream MCB or fuse, verify dead with a voltage tester on all three phases at the MS495 line terminals, then proceed. Never rely on the MS495’s own handle position as proof of isolation — it is a motor starter, not an isolator.

Reliability in Harsh Conditions

The MS495 is not a light-duty device. ABB engineered this series for the kind of environments where most components fail early — and it shows in the construction details.

The housing is rated IP20 as standard, with the option for IP65 enclosure mounting in wet or washdown areas. The bimetal overload element is compensated for ambient temperature variation, meaning it maintains accurate trip thresholds whether your panel is sitting in a 10°C coastal substation or a 45°C desert pump house. Vibration resistance meets IEC 60068-2-6 test profiles — relevant for installations on compressor skids, ship engine rooms, or mobile equipment where mechanical shock is constant.

The silver-alloy contacts are rated for millions of mechanical operations and hundreds of thousands of electrical operations at rated current. In practice, a properly set MS495 in a normal motor application will outlast the motor it protects. The units we supply are stored in climate-controlled conditions in our Xiamen facility — no humidity cycling, no shelf degradation.

For offshore, marine, or high-humidity applications: request our documentation on salt-fog tested units and confirm your enclosure IP rating before installation. We can advise on compatible ABB enclosure accessories.

Global Express Logistics

Our dispatch operation runs from Xiamen, Fujian — one of China’s primary export hubs with direct access to DHL, FedEx, and UPS international gateways. Here’s how a typical emergency order moves:

Day 0 (Order Confirmed): Stock verified, unit inspected, export documentation prepared. Commercial invoice, packing list, and HS code (8536.49) generated. For orders confirmed before 14:00 CST, same-day handover to courier is standard.

Day 1–2: Airfreight departs Xiamen or Shanghai hub. DHL Express and FedEx International Priority are our primary carriers for emergency shipments. Real-time tracking number issued within 4 hours of pickup.

Day 3–5 (Most Destinations): Delivery to Southeast Asia, Middle East, and Europe. Australia and Americas typically 5–7 business days. Customs clearance documentation is pre-prepared to minimize border delays.

We handle all export formalities. If your procurement team requires a formal proforma invoice, ECCN classification, or specific country-of-origin certificate, request it at order confirmation — we turn these around within 2 hours during business hours.

For bulk orders or repeat supply agreements, sea freight from Xiamen port is available with competitive lead times. Contact us to discuss blanket order arrangements and consignment stock options.

Contact Information

📧 Email: [email protected]
📱 WhatsApp: +86 18359268345
🌐 Web: siemensplc.com
© 2026 siemensplc.com. All rights reserved.