R. STAHL LS Miniature Circuit Breaker

System Components

R. STAHL's LS Miniature Circuit Breakers are designed for reliable circuit protection. The 8530 series offers good current limitation for short circuits and high breaking capacity (10, 15, or 25 kA), resulting in reduced stress on cables and improved selectivity with upstream fuses. These components are modular and available in 1- to 4-pole versions for nominal currents from 0.5–63 A. The maximum installation capacity is 4.5 module units (TE).

Key Features:

• Disconnector function according to EN 60947-2
• Energy limitation class 3
• Easy replacement or expansion of your system due to modular design
• Simple mounting by snapping onto the top-hat rail in Ex e enclosures
• Fixed thermal and magnetic trip units
• Ergonomically shaped operating lever for safe switching
• Protection against re-energization during maintenance using padlocks (accessory)

Technical Data

Explosion Protection

• Area of application (Zones): 1, 2
• Area of application (Zones) Note: Usable in Zone 21 / 22 when protected by enclosure Ex tb / tc
• IECEx Certificate Gas: IECEX FMG 19.0029U
• IECEx Gas Explosion Protection: Ex db eb IIC Gb
• ATEX Certificate Gas: FM19ATEX0191U
• ATEX Gas Explosion Protection: II 2 G Ex db eb IIC Gb
• Certifications: ATEX (FM), Brazil (ULB), IECEx (FM), People's Republic of China (CQST)
• Declarations of Conformity: Conformity certification (ATEX)

Electrical Data

• Rated operational voltage AC: 230/400 V
• Rated operational current: 63 A
• Frequency: 50/60 Hz
• Rated breaking capacity: 10 kA
• Electrical service life: 10⁴
• Mechanical service life: 2 x 10⁴
• 1st Auxiliary function: Auxiliary contact 1 changeover
• Rated voltage 1st Auxiliary function AC: 230 V
• Max. rated current 1st Auxiliary function: 2 A
• 2nd Auxiliary function: none
• Max. voltage 2nd Auxiliary function DC: -

Tripping Characteristic

• Characteristic: C
• Number of poles: 3-pole+N

Environmental Conditions

• Ambient temperature: -40 °C ... 70 °C
• Ambient temperature (Fahrenheit): -40 °F ... 158 °F
• Ambient temperature note: Deviating ambient temperatures are available upon request based on current certificates.

Mechanical Data

• Enclosure type (IP) (IEC 60529): IP2X
• Housing material: Thermoplast
• Conductor cross-section min.: 1.5 mm²
• Conductor cross-section max.: 25 mm²
• Conductor cross-section AWG min.: 16 AWG
• Conductor cross-section AWG max.: 4 AWG
• Conductor cross-section 2 min.: 1.5 mm²
• Conductor cross-section 2 max.: 10 mm²
• Conductor cross-section 2 AWG min.: 16 AWG
• Conductor cross-section 2 AWG max.: 8 AWG
• Conductor cross-section HIKO min.: 0.5 mm²
• Conductor cross-section HIKO max.: 4 mm²
• Conductor cross-section HIKO AWG min.: 18 AWG
• Conductor cross-section HIKO AWG max.: 14 AWG
• Tightening torque min.: 2 N·m
• Tightening torque max.: 3 N·m
• Conductor cross-section note: 2-conductor connection (upper and lower chamber simultaneously): Max. 16/10 mm² for upper and lower chamber (a maximum cross-section difference between the upper and lower chamber may be clamped). Permitted conductor cross-section combinations can be found in the operating manual.

Dimensions

• Width: 110 mm (4.33 in)
• Length: 165 mm (6.50 in)
• Depth: 138.3 mm (5.44 in)
• Weight: 1.8 kg (3.969 lb)

Mounting / Installation

• Tightening torque: 2-3 N·m (17.7 ... 26.6 lbf-in)
• Tightening torque auxiliary contact: 0.4-0.6 Nm (3.5 ... 5.3 lbf-in)

Technical Drawings and Diagrams

Tripping Characteristic C: The diagram shows the tripping time in seconds versus multiples of the rated current (I/In) for both AC and DC. The limit characteristic from a cold state is indicated.

Dimensional Drawings: The drawings provide dimensions in millimeters and inches for the device, showing its overall size and mounting footprint. It is noted as 4 module units (TE).

Accessories

Locking Device (Fourfold)

A lock-out / tag-out shackle for individually locking the component, usable with up to 4 cylinder locks.

• Article No.: 227232

Mounting Set

A mounting set for attaching the component to the mounting plate without a top-hat rail.

• Article No.: 276618

Cylinder Lock

For locking (shackle Ø 3)

• Article No.: 107115