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1SDA050543R1 ABB TOR CL 185 mm RCQ Closed Toroidal Current Transformer
ABB 1SDA050543R1 is a 185 mm closed toroidal current transformer designed as the sensing element for compatible ABB RCQ residual-current protection systems.
£825.87
Why Choose the ABB 1SDA050543R1 Closed Toroid?
The ABB 1SDA050543R1 is a genuine ABB closed toroidal current transformer designed for use with compatible RCQ residual-current protection equipment. Identified as TOR CL 185 mm RCQ, it features a closed-core design with a 185 mm internal diameter for accommodating the conductors of the monitored circuit.
The toroid operates as the sensing element within a compatible RCQ residual-current protection arrangement. Conductors pass through the toroidal opening, allowing the associated protection system to monitor residual current and provide the measurement input required by the RCQ relay.
ABB specifies the 1SDA050543R1 within its panel-type residual-current protection accessory range, with compatibility across multiple ABB low-voltage circuit-breaker platforms. The 185 mm closed opening makes this version particularly suitable where a large conductor bundle or busbar arrangement must pass through the residual-current sensing transformer.
Key Advantages
- Genuine ABB RCQ residual-current protection accessory.
- Closed toroidal current-transformer construction.
- Large 185 mm toroid diameter.
- Designed as a sensing element for compatible RCQ residual-current relays.
- Suitable for multiple ABB low-voltage circuit-breaker platforms.
- Large opening accommodates substantial conductor or busbar arrangements.
- Dedicated ABB order code simplifies specification and replacement.
Key Features
- TOR CL closed toroidal current transformer.
- ABB order code 1SDA050543R1.
- Toroid diameter: 185 mm.
- Designed for RCQ residual-current protection systems.
- Closed-core construction.
- Used with compatible panel-type residual-current protection equipment.
- Compatible with multiple SACE Tmax XT, Tmax T and Isomax circuit-breaker platforms.
- IEC product configuration.
Residual-Current Sensing for RCQ Protection Systems
A toroidal current transformer enables residual-current monitoring by surrounding the active conductors of the protected circuit. Under normal operating conditions, the vector sum of the currents passing through the toroid is effectively balanced; an imbalance caused by current flowing outside the intended circuit path can then be detected by the associated residual-current protection equipment.
The ABB 1SDA050543R1 provides this sensing interface for compatible RCQ equipment with a generous 185 mm closed opening. Because it is the toroid-only component, it is intended to operate as part of a compatible RCQ protection arrangement rather than as a standalone residual-current relay.
Typical Applications
- ABB RCQ residual-current protection systems.
- Low-voltage distribution switchboards.
- Industrial power-distribution systems.
- Commercial and infrastructure switchgear.
- Large conductor bundles requiring a 185 mm toroidal opening.
- Compatible SACE Tmax XT and Tmax T circuit-breaker installations.
- Compatible SACE Isomax installations.
Technical Specifications
| ABB order code | 1SDA050543R1 |
|---|---|
| Product type | Toroidal current transformer |
| Accessory type | Residual-current sensing toroid |
| Construction | Closed toroid |
| Toroid diameter | 185 mm |
| Protection system | RCQ |
| Application | Residual-current measurement and protection |
| Compatible product families | SACE Tmax XT, SACE Tmax T and SACE Isomax |
| Compatible Tmax XT frames | XT1, XT2, XT3, XT4, XT5, XT6 and XT7 / XT7M |
| Compatible Tmax T frames | T1, T2, T3, T4, T5, T6 and T7 |
| Compatible Isomax frames | S4, S5, S6 and S7 |
| Reference standard | IEC |
| Product group | 310511-T-Max T4 - T8 |
Frequently Asked Questions
What is the ABB 1SDA050543R1?
The ABB 1SDA050543R1 is a closed toroidal current transformer with a 185 mm diameter for use with compatible ABB RCQ residual-current protection equipment.
What is the diameter of the ABB 1SDA050543R1 toroid?
The 1SDA050543R1 has a specified toroid diameter of 185 mm.
Is the ABB 1SDA050543R1 an openable or closed toroid?
It is a closed toroid, identified by ABB as TOR CL 185 mm RCQ.
What is the ABB 1SDA050543R1 used for?
It is used as the current-sensing toroid within a compatible RCQ residual-current protection system, monitoring the conductors passing through its opening for residual-current imbalance.
Does the ABB 1SDA050543R1 include the RCQ relay?
No. The 1SDA050543R1 is the closed toroid only; the appropriate RCQ residual-current relay is a separate component of the protection system.
Which ABB product families can use the 1SDA050543R1?
ABB identifies the 185 mm closed toroid for compatible installations across the SACE Tmax XT, Tmax T and Isomax circuit-breaker families.
Trusted by Electrical Professionals Worldwide
ABB residual-current protection accessories provide dedicated sensing and protection components for low-voltage electrical distribution systems, supporting panel builders, installers and maintenance professionals in industrial, commercial and infrastructure switchgear applications.
