ABB 1SAR330020R0000 Replacement for CT-ARS Series

Product Overview

ABB 1SAR330020R0000 Replacement for CT-ARS Series: Smooth Transition & Legacy System Compatibility

The ABB 1SAR330020R0000 is a CT-ARS series star-delta time delay relay designed for motor soft-start applications in industrial control panels. As legacy ABB relay models reach end-of-life or become increasingly difficult to source, plant engineers and maintenance teams face the challenge of replacing aging timing components without disrupting production schedules or requiring extensive panel rewiring. This product page is specifically structured to support engineers undertaking a direct replacement or upgrade from discontinued or hard-to-source ABB CT series timing relays.

The 1SAR330020R0000 fits directly into standard 35 mm DIN rail mounting arrangements commonly found in motor control centers (MCCs), distribution panels, and machine control cabinets. Its compact footprint ensures compatibility with existing cabinet layouts where space is constrained, eliminating the need for panel modifications during a retrofit. The relay operates on a wide supply voltage range, making it suitable for both 24 V DC auxiliary circuits and 110–240 V AC control circuits typically found in older ABB system architectures.

For facilities migrating from older ABB CT-D, CT-MFD, or CT-TGD timing relay variants, the 1SAR330020R0000 provides a functionally equivalent star-delta timing sequence. The output contact configuration — featuring one normally open (NO) and one normally closed (NC) timed contact — mirrors the wiring arrangement of predecessor models, allowing technicians to reuse existing terminal wiring with minimal modification. This is particularly valuable in retrofit scenarios where the original wiring diagrams are no longer available and field technicians must rely on terminal-for-terminal substitution.

In star-delta motor starter circuits, the timing relay coordinates the transition from star (Y) to delta (Δ) connection, typically after a 3–30 second delay depending on motor load characteristics. The 1SAR330020R0000 supports an adjustable time range that covers the majority of standard induction motor starting requirements, from small pump motors to larger compressor and conveyor drive applications. When replacing a failed or obsolete timing relay in an existing star-delta starter assembly — which may also include ABB AF series contactors, A series auxiliary contactors, and S series motor protection circuit breakers — the 1SAR330020R0000 can be installed without modifying the contactor interlock wiring or the overload relay settings.

Integration with ABB’s broader control ecosystem is straightforward. In panels where the timing relay interfaces with an ABB CP series control panel HMI or feeds a signal into an ABB AC500 PLC digital input module, the relay’s output contacts provide clean, bounce-free switching suitable for direct PLC input wiring. No signal conditioning or interposing relay is required in most standard 24 V DC PLC input circuits. For legacy systems using ABB SACE Tmax or Emax circuit breakers with shunt trip coils, the relay’s timed output can also be used to sequence protection tripping logic during controlled shutdowns.

Facilities that have standardized on ABB’s System pro M compact or System pro E power distribution components will find that the 1SAR330020R0000 mounts directly alongside existing ABB S200 series miniature circuit breakers and E200 series residual current devices on the same DIN rail section, maintaining a consistent panel layout and simplifying future maintenance inspections.

From a procurement standpoint, sourcing the 1SAR330020R0000 as a direct replacement eliminates the engineering overhead associated with cross-referencing alternative brands or redesigning the timing circuit. Stocking this relay as a critical spare — alongside the associated ABB AF09 to AF38 series contactors and TA series thermal overload relays used in the same star-delta assembly — reduces mean time to repair (MTTR) for motor starter faults and supports a proactive maintenance strategy.

Compatibility Comparison Table

Seamless Upgrade Solutions

A complete star-delta motor starter retrofit typically involves more than just the timing relay. In most field scenarios, the 1SAR330020R0000 is installed alongside a set of ABB AF series contactors — commonly the AF09, AF12, or AF16 — which handle the main, star, and delta switching duties. The thermal overload relay, often an ABB TA25DU or TA42DU, protects the motor during the transition period and should be inspected or replaced as part of the same maintenance event to ensure coordinated protection settings.

For panels where the control circuit is powered from an ABB CP-S or CP-E series 24 V DC SMPS power supply unit, the timing relay draws negligible burden current and will not require a power supply upgrade. In older installations using a transformer-based 110 V AC control supply, the relay’s wide voltage input range ensures direct compatibility without an additional step-down transformer.

Where the star-delta starter is controlled by an ABB AC500 PLC or an older ABB 07 KT 98 / 07 KT 97 controller, the timing relay’s output contacts feed directly into the PLC’s digital input module — such as the ABB DC532 or DI524 I/O modules — without requiring signal isolators or interposing relays in standard 24 V DC circuits. In higher-noise environments or where the PLC input card operates at 110 V AC, an ABB CR-M series signal conditioning relay or a Phoenix Contact or Weidmüller signal isolator module may be inserted between the timing relay output and the PLC input terminal.

Terminal blocks within the same panel section — typically ABB ENTRELEC SNK or SAK series feed-through terminals — do not require replacement when substituting the 1SAR330020R0000, as the terminal pitch and wire gauge compatibility remain unchanged. This further reduces installation time and the risk of wiring errors during the retrofit.

For facilities managing a broader ABB panel modernization program, the 1SAR330020R0000 is often procured together with ABB S200 series MCBs for branch circuit protection, ABB F200 series RCDs for personnel protection, and ABB OT series manual motor starters or isolator switches, all of which share the same DIN rail ecosystem and are available through TOPNLMS as part of a consolidated spare parts order.

Retrofit Guidance FAQ

Q: Can I replace my existing CT-D or CT-MFD relay with the 1SAR330020R0000 without rewiring?
A: In the majority of standard star-delta starter configurations, yes. The output contact arrangement (1 NO + 1 NC timed) and DIN rail footprint are consistent with predecessor CT series models. Verify terminal numbering against your existing wiring diagram before installation.

Q: Is the supply voltage compatible with my existing control circuit?
A: The CT-ARS series supports a wide input voltage range covering both 24 V DC and 110–240 V AC control circuits. Confirm your panel’s control supply voltage against the relay’s rated input range on the product datasheet before ordering.

Q: Will this relay work with my ABB AC500 PLC digital inputs?
A: Yes. The relay’s output contacts are suitable for direct connection to 24 V DC PLC digital input modules. No signal conditioning is required in standard low-voltage control circuits.

Q: Does the physical size match the original relay for panel cutout or DIN rail slot reuse?
A: The 1SAR330020R0000 uses standard 35 mm DIN rail mounting with a 1-module width profile, consistent with the CT series form factor. No panel cutout modification or DIN rail adapter is required.

Q: What if my original relay used a different time range setting?
A: The CT-ARS series features an adjustable time dial. Set the time delay to match your original motor starting requirement (typically 3–15 seconds for most induction motors) during commissioning. Refer to the motor manufacturer’s starting current curve if the original setting is unknown.

Q: Can I use this relay in a PLC-controlled star-delta circuit where the PLC also manages the contactor sequencing?
A: Yes. In hybrid configurations where the PLC manages contactor sequencing and the timing relay provides a hardware backup or independent timing signal, the 1SAR330020R0000 integrates without conflict. Coordinate the PLC program timer setpoint with the relay’s mechanical time setting to avoid sequencing conflicts.

Warranty Assurance

Every ABB 1SAR330020R0000 CT-ARS time delay relay supplied by TOPNLMS is covered by a 12-month warranty from the date of shipment. Prior to dispatch, each unit undergoes functional verification including timing accuracy check, output contact continuity test, and supply voltage input test across the rated range. Units that do not meet ABB’s published specifications are quarantined and not shipped.

In the event of a warranty claim, TOPNLMS provides a replacement unit or full refund within the warranty period. Our after-sales response target is 24 hours for initial acknowledgment and 72 hours for resolution proposal. Warranty claims are processed via email at [email protected] with order reference and fault description.

For urgent production-down situations, TOPNLMS maintains stock of critical ABB timing relay and contactor components to support same-day or next-business-day dispatch from Xiamen, China, with DHL Express, FedEx International Priority, and UPS Worldwide Express shipping options available to minimize plant downtime.

Bulk procurement and standing order arrangements are available for MRO teams and system integrators managing multi-site ABB panel maintenance programs. Contact our technical sales team to discuss consignment stock, vendor-managed inventory (VMI), or framework agreement pricing.