ABB S500 heavy-duty circuit breaker

ABB S500 heavy-duty circuit breaker

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Product Overview

The ABB S500 series heavy-duty circuit breaker is a protective switchgear designed to meet the increasing demand for short-circuit current in low-voltage power grids, with high safety, reliability, and breaking capacity. Its core function is to protect circuits, motors, equipment, and systems from the effects of overload and short-circuit currents through thermal and/or electromagnetic trip functions. It is widely used in various fields such as railways, commercial buildings, offshore platforms, ships, process industries, and rail trams.

Core Features

High performance parameters:

High rated breaking capacity, up to 30/50 kA.

High rated working voltage, AC 400/690 VAC, DC 750 VDC.

Equipped with current and energy limiting breaking capabilities, the breaking time is extremely short, ensuring system safety.

Functional advantages:

Excellent selectivity ensures that only the faulty part is disconnected in the event of a malfunction, while maintaining the operation of other parts of the system.

The switch and contact position indication are reliable and convenient for status monitoring.

Provide multiple special application versions to meet the needs of different scenarios.

Compact in size (compliant with DIN standards), with a wide range of accessories including undervoltage release, shunt release, auxiliary contacts, and signal contacts.

Main product types and applications

Circuit protection series:

S500-B: Suitable for equipment with no or only minimal surge current (such as boilers, electric heaters, etc.).

S500-C: Standard type, suitable for devices with surge current (such as inductive devices, sockets, etc.).

S500-D: Suitable for devices with extremely high surge currents (such as transformers, capacitor banks, etc.), and can also be used as protection for upstream circuit breakers.

Motor protection series:

S500-K: Used to protect single-phase and three-phase motors, can be installed in a fuse free motor control center, with adjustable rated current.

S500-KM: It only has electromagnetic trip function and needs to be combined with independent overload protection to provide short circuit protection for the motor.

S503X-AG0084: Alternative to S500-KM, with high breaking capacity (50 kA at 400 VAC), suitable for high short-circuit current scenarios.

DC Circuit Protection Series (S500UC-B/K):

Suitable for DC applications such as railway systems, electroplating, and DC networks. Single pole can switch to 250 VDC, and multi pole series can switch to 750 VDC+20%.

It is divided into fixed rated current (B characteristic) and adjustable rated current (K characteristic) versions.

Residual current protection series:

F500-C/D: It has both circuit protection and residual current tripping functions, and can protect against direct contact, dangerous residual current, etc.

F500-K: Equipped with motor protection features and residual current trip function, suitable for motor systems.

DDA series: can be installed by users on S500 circuit breakers, suitable for sine AC residual current and pulse residual current scenarios in DC circuits.

Short delay/selective residual current protection: F500K... 0.03 G (short delay type) and F500S... 0.3 S (selective type), respectively used to avoid false tripping and ensure selectivity with downstream equipment.

Technical parameters and characteristics

Electrical parameters:

The rated current range is wide, covering 0.1 A to 63 A (some models have higher ratings).

The rated breaking capacity varies depending on the model and application scenario, and can reach up to 50 kA.

The working frequency covers 50/60 Hz, and can support 16 ²/∝ Hz and 400 Hz under special requirements.

Environment and Installation:

Allowable ambient temperature -25 ° C...+55 ° C, storage temperature -25 ° C...+70 ° C.

Protection level IP20, flexible installation method, can be installed at any angle, supports up and down incoming lines.

Long mechanical lifespan, with a switch frequency of over 20000 times.

Selective and Backup Protection

Selectivity: By properly coordinating the upper and lower circuit breakers, ensure that only the faulty part is disconnected during a short circuit. The document provides selective coordination parameters with upstream circuit breakers, backup fuses, and downstream miniature circuit breakers.

Backup protection: When the short-circuit current at the installation point exceeds the breaking capacity of the circuit breaker, it is necessary to configure according to the rated current limit of the upstream circuit breaker. The document provides specific backup protection parameters and cable length requirements.

Accessories and Installation

Accessories: including factory pre installed accessories (such as switching neutral wire NA, separating neutral wire N, release, residual current signal contacts, etc.) and user installable accessories (such as auxiliary contacts, signal contacts, locking devices, rotary drives, etc.).

Installation: 35 mm standard rail clip shall be used for installation, and the safety spacing requirements shall be followed. When cleaning, use a vacuum cleaner or wet rag (soap lotion), and avoid using compressed air or high-pressure cleaner.