ABB PST105-600-70 Soft Starter

ABB PST105-600-70 — Stop the Clock on Your Downtime. Ship Today.

Your conveyor just tripped. The pump station is offline. The shift supervisor is breathing down your neck. You’ve traced the fault to the soft starter — and now every minute of downtime is burning money. The ABB PST105-600-70 is on our shelf in Xiamen right now. We’ve shipped to plants in Germany, Malaysia, Saudi Arabia, and Brazil within 48 hours of inquiry. This is not a lead-time quote — this is a same-day dispatch commitment.

The PST105-600-70 is a three-phase electronic soft starter rated at 105A / 600V / 70kW, built for the ABB PST/PSTB series. It features a built-in bypass contactor, integrated motor protection, and a wide control voltage range of 100–250V AC. Whether you’re running a water treatment pump, a crusher drive, or a marine auxiliary motor, this unit handles the load — and handles it cleanly.

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

Quick Technical Datasheet

Troubleshooting & Replacement Tips

After ten years of field work, here’s what actually goes wrong with the PST105-600-70 — and what to watch before you bolt in the replacement:

1. Fault Code 1 / Overload Trip (most common call-out)
Nine times out of ten this isn’t the soft starter’s fault — it’s a motor winding issue or a blocked impeller that pushed current above the trip threshold. Before swapping the unit, clamp-meter all three phases at the motor terminals under load. If current is balanced and within nameplate, the starter’s internal overload relay has drifted. Replace the PST105-600-70 and recalibrate the overload setting to 1.0× FLA on the new unit.

2. Fault Code 3 / Phase Loss
Check the incoming supply first — loose terminal screws on L1/L2/L3 are responsible for roughly 40% of phase-loss faults we see in the field. If supply is solid, the SCR firing board inside the starter has likely failed asymmetrically. No field repair is practical; direct replacement is the correct call.

3. Bypass Contactor Welding
The PST105-600-70’s built-in bypass contactor can weld shut under repeated high-inertia starts (crushers, large fans). Symptom: motor runs but the starter display is blank after the ramp-up period. Confirm by measuring voltage across T1–T2–T3 with the starter powered down — if you read line voltage, the bypass is welded. Replace the entire unit; the bypass is not a field-serviceable component.

4. Ramp Time Mismatch After Replacement
The PST105-600-70 stores ramp-up and ramp-down times on internal DIP switches (SW1–SW4) and the front-panel potentiometers. When fitting a replacement unit, photograph the old unit’s switch positions and pot settings before removal. Default factory settings are 5s ramp-up / 5s ramp-down — fine for pumps, but crushers and compressors typically need 10–15s to avoid mechanical shock.

5. Control Voltage Mismatch
The PST105-600-70 accepts 100–250V AC on terminals A1/A2. If your panel runs 24V DC control circuits, you need an interposing relay. We’ve seen units returned as “faulty” that were simply wired to a 24V DC source — the starter never powered up. Verify control voltage before condemning the unit.

6. Thermistor Input (T1/T2)
If the motor has a PTC thermistor wired to T1/T2 and the thermistor circuit is open (broken wire or failed sensor), the PST105-600-70 will refuse to start and display a thermistor fault. Jumper T1–T2 temporarily to confirm this is the cause, then replace the motor thermistor before returning to normal operation.

Reliability in Harsh Conditions

The ABB PST series was not designed for air-conditioned server rooms. It was built for the floor — and the PST105-600-70 proves it every day in environments that would kill lesser electronics.

The unit’s conformal-coated PCBs resist condensation and salt-laden air, making it a standard fit in coastal pump stations and offshore platforms where humidity regularly exceeds 95% RH. The wide operating temperature range of -25°C to +60°C (derated above 40°C) means it keeps firing in both Siberian compressor houses and Middle Eastern desalination plants without modification.

Vibration resistance to IEC 60068-2-6 (10–150 Hz, 1g) means the unit survives on crusher and mill drives where the panel itself shakes. The IP20 enclosure keeps fingers and tools out of live parts during maintenance, and the robust terminal block design — rated for 35mm² cable — handles the high-current connections that cheaper starters strip or arc over time.

We’ve shipped PST105-600-70 units to mining operations in Western Australia, cement plants in Egypt, and paper mills in Scandinavia. The feedback is consistent: the unit runs, and when it eventually fails after years of service, it fails cleanly with a readable fault code rather than a catastrophic arc event.

Global Express Logistics

Our warehouse is in Xiamen, Fujian — one of China’s primary export hubs with direct DHL and FedEx gateway access. Here’s exactly how your order moves:

Day 0 (Order Confirmed): Payment or PO received before 14:00 CST triggers same-day pick, inspection, and packaging. The PST105-600-70 is wrapped in anti-static foam, boxed with a printed inspection report, and staged for courier collection.

Day 1 (Dispatch): DHL Express or FedEx International Priority label generated. Tracking number sent to your email within 2 hours of pickup. For orders to Europe and North America, the shipment clears Xiamen customs the same evening.

Day 2–4 (Delivery): DHL Express typically delivers to Germany, UK, Netherlands, and UAE within 2–3 business days from Xiamen. FedEx IP reaches the US East Coast in 3–4 days. Southeast Asia (Singapore, Malaysia, Thailand) often arrives in 1–2 days.

Documentation included: Commercial invoice with HS code 8536.49, packing list, certificate of origin (Form E available for ASEAN), and our inspection certificate. All paperwork is pre-formatted for customs clearance — no delays at the border.

For critical shutdowns requiring next-flight-out courier, contact us directly on WhatsApp. We have handled hand-carry arrangements for customers facing multi-million-dollar production losses. We know what urgent means.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
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