ABB 1SAR330020R0000 CT-ARS Time Delay Relay

ABB 1SAR330020R0000 Down? Every Minute of Downtime Costs You Money — We Ship Today

Your star-delta starter just tripped and the CT-ARS timing relay is the culprit. The motor won’t start, the line is cold, and your maintenance window is closing fast. You don’t need a lecture on relay theory — you need a verified, ready-to-ship ABB 1SAR330020R0000 in your hands before the next shift. That’s exactly what we do.

We stock the ABB 1SAR330020R0000 CT-ARS star-delta time delay relay in Xiamen, China, with same-day dispatch on confirmed orders. DHL Express puts it on your bench in 2–5 business days, anywhere on the planet. No sourcing delays, no grey-market gambles, no excuses. While your competitors are still waiting on a quote, your line is already back up.

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

Quick Technical Datasheet

Troubleshooting & Replacement Tips

Common failure modes on the CT-ARS in the field:

• Relay fires immediately on power-up (no star delay): The timing potentiometer wiper has worn to minimum resistance — common after 5+ years of vibration. Confirm by measuring resistance across timing terminals before condemning the contactor. Replace the relay; do not attempt to re-calibrate the pot.
• Star-to-delta transition never occurs (motor stays in star): Check the output CO contact continuity with a multimeter at the relay terminals. If the delta contact never closes after the set time, the internal timer IC has failed — typically caused by a voltage spike from an upstream contactor without surge suppression. Fit RC snubbers or varistors across all contactor coils before installing the replacement.
• Erratic timing (varies ±30% between cycles): Almost always a supply voltage issue. The CT-ARS universal input handles 24–240 V AC/DC, but severe voltage sags during motor starting can reset the internal timing circuit. Measure supply voltage at the relay terminals during a start attempt. If it dips below 20 V, add a dedicated 24 V DC supply for the control circuit.
• Relay chatters on transition: Worn delta contactor main contacts causing a voltage dip that momentarily drops the relay supply. Replace the delta contactor simultaneously — a CT-ARS failure is often a symptom, not the root cause.

Step-by-step replacement procedure (zero-downtime swap):

1. Isolate and lock out the MCC section. Verify dead with a calibrated voltage tester at the contactor terminals.
2. Photograph the existing relay wiring before disconnecting — terminal numbering on the CT-ARS is A1/A2 (coil supply), 15/16 (star NO), 25/26 (delta NO), 18/28 (common). Do not rely on memory.
3. Note the timing potentiometer setting on the old relay (count dial graduation marks). Set the replacement to the same position before installation.
4. The CT-ARS requires no DIP switch configuration or firmware — it is purely hardware-timed. No address setting, no parameter download required.
5. After installation, perform a no-load test start: verify star contactor closes first, then delta contactor closes after the set delay, and star contactor drops out simultaneously. Any overlap indicates a wiring error at terminals 15/16 vs 25/26.
6. Log the replacement in your CMMS with the new relay’s lot number for traceability.

Reliability in Harsh Conditions

The CT-ARS series was designed for the realities of industrial panel environments — not a climate-controlled lab. The universal input circuit tolerates supply voltage swings from 24 V DC to 240 V AC without component changes, which matters when your control transformer is undersized or the site voltage is unstable. The −25 °C lower operating limit means cold-start reliability in unheated substations and outdoor switchrooms in northern climates.

The 22.5 mm housing is built to IEC 60068-2-6 vibration test standards, making it suitable for panels mounted directly on compressor skids, pump bases, and mobile equipment where constant mechanical excitation would destroy lesser relays within months. The screw-clamp terminals accept up to 2.5 mm² conductors and maintain contact force under thermal cycling — a detail that matters in panels that see 40 °C daily temperature swings.

IP20 front protection with finger-safe terminal shrouds means the relay can be replaced safely in a live panel during a controlled maintenance window without requiring full panel de-energisation — a practical advantage when you’re working in a 24/7 production environment where a full shutdown is not an option.

Every unit we ship has been stored in a controlled-humidity warehouse. Electrolytic capacitors in timing circuits degrade in high-humidity storage — we do not stock product in uncontrolled environments, and we rotate inventory on a FIFO basis to ensure you receive a relay with full remaining service life.

Global Express Logistics

Our dispatch hub is in Xiamen, China — one of the country’s primary export ports with direct DHL and FedEx gateway access. Here’s what happens after you confirm your order:

• Same business day (order before 15:00 CST): Order verified, unit pulled from stock, inspected, and packed in anti-static inner bag → original ABB retail box → double-wall export carton with moisture barrier.
• Day 1: Shipment collected by DHL Express or FedEx International Priority. Tracking number sent to your email within 2 hours of pickup.
• Days 2–5: Delivery to most destinations in Southeast Asia (1–2 days), Middle East (2–3 days), Europe (3–4 days), North America (3–5 days). Exact transit time confirmed at order.
• Customs clearance: Full commercial invoice, packing list, HS code 8536.49 declaration, and country-of-origin documentation included in every shipment. We have zero customs holds on record for this product category.
• Bulk orders: For quantities above 10 units, we can consolidate with other parts on your BOM and ship as a single consignment to reduce your per-unit freight cost. Contact us to discuss.

If your plant is in a remote location or a country with complex import requirements, contact us before ordering — we have experience shipping to offshore platforms, mining sites, and restricted-import markets and can advise on the most efficient routing.

Contact Information

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