Description
The 1SDA064796R1 is a switch-type accessory module (commonly an auxiliary contact block, control switch, or motor-operator component depending on the specific breaker configuration) manufactured by ABB under the SACE Tmax 1SDA06 accessory series. It is designed to snap directly onto the left- or right-hand side of ABB Tmax XT series molded-case circuit breakers (MCCB)—XT1 through XT4 frames—providing breaker position feedback (ON/OFF/TRIP) to a PLC/DCS or enabling remote electrical operation / control interlocking without modifying the breaker’s primary protection function.
Application Scenarios
Imagine a water-treatment plant where the main 400 V distribution board uses ABB Tmax XT2 MCCBs to protect large pump feeders. During a routine panel audit, the maintenance team discovers that one pump’s SCADA shows no “Breaker Closed” status—the original auxiliary contact block has failed mechanically after 15 years of thermal cycling. Rather than replace the entire MCCB (which would mean de-energizing the busbar, unbolting heavy Cu bus joints, and re-terminating), the electrician simply isolates the individual breaker, snaps out the failed accessory, and clicks a new 1SDA064796R1 into the same side slot. The contact block’s SPDT contacts immediately feed correct ON/OFF status to the PLC, and the pump’s auto-start logic is restored—all in under 10 minutes with zero disturbance to adjacent circuits. The 1SDA064796R1 solves the common pain point of aged MCCB accessories in live panels, letting plants refresh only the worn control element while preserving the certified protection device and its terminations.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1SDA064796R1 (SACE Tmax 1SDA06 Accessory Series) |
| Manufacturer | ABB |
| Product Category | MCCB Accessory — Auxiliary Switch Block / Control Module (clip-on side mount) |
| Compatible Breakers | ABB SACE Tmax XT1, XT2, XT3, XT4 (also selected Tmax T series frames — verify per breaker type) |
| Function | Auxiliary contact (typically 1NO+1NC or 2NO+2NC SPDT), or specified shunt/UV release / motor operator variant per 1SDA064796R1 subtype |
| Contact Rating | 6 A @ 250 V AC / 16 A @ 24 V DC (typical auxiliary contact rating — verify against your exact accessory type) |
| Control Voltage (if motorized/shunt) | Common 24 V DC / 110–240 V AC (must match ordered variant; check breaker’s accessory code) |
| Mounting Method | Clip-on / slide-in to dedicated left or right accessory slot on Tmax XT breaker — no tools beyond small flat-blade for terminal screws |
| Electrical Life | ≥ 10,000 operations @ rated load (aux contact); ≥ 6,000 ops (motor operator variants) |
| Mechanical Life | ≥ 100,000 operations (aux contact block) |
| Operating Temp. | -25 °C to +70 °C |
| Protection Class | IP20 (when installed inside breaker — overall assembly IP30–IP40 dependent on MCCB enclosure) |
| Standards / Certifications | IEC 60947-1 / IEC 60947-2, CE, CCC, UL, CSA |
| Dimensions (Approx.) | 45 × 70 × 25 mm (compact side-mount module) |
| Weight (Approx.) | 0.06–0.10 kg |
Technical Principles and Innovative Values
- Innovation Point 1 — Tool-Free Clip-On Side Mounting: The 1SDA064796R1 is engineered with a molded dovetail that snaps positively into the pre-machined accessory slot of any compatible Tmax XT breaker. No disassembly of the MCCB, no special tools, and no busbar disturbance—this modular “add-as-needed” design lets panels be commissioned with minimal accessories initially and upgraded later without downtime on adjacent circuits.
- Innovation Point 2 — Positive Mechanical Linkage to Breaker Operating Mechanism: Unlike add-on external microswitches, the 1SDA064796R1 couples directly to the breaker’s operating shaft / trip bar. It distinguishes true TRIP (mechanically latched trip position) from manual OFF—a critical distinction for DCS alarm logic that differentiates a protective trip from an operator-initiated open command.
- Innovation Point 3 — Front-Accessible Screw Terminals with Clear Marking: All contact terminals are brought to the front face with embossed A1/A2/11-12-14 markings, allowing panel builders and maintenance staff to land control wires cleanly even in dense panels. The block is keyed to prevent incorrect insertion, and its silver-cadmium oxide (AgCdO) or silver-nickel contacts deliver low contact resistance over decades of service.
