ABB E max series low-voltage molded case circuit breaker (Sace)

ABB E max series low-voltage molded case circuit breaker (Sace)

The ABB E max series low-voltage power circuit breaker (Sace) is an innovative product developed based on over half a century of circuit breaker technology. It has high reliability, easy installation, and flexible adaptability. It has passed UL certification and complies with ANSI low-voltage power circuit breaker standards, covering a rated continuous current range of 800A-5000A and a rated short-circuit current range of 42kA-125kA (480V). It is suitable for distribution systems, industrial equipment, and other scenarios, providing efficient power protection solutions for designers, switchgear manufacturers, installers, and users.

Core product classification and key parameters

1. Model and frame specifications

The series includes five models (four sizes): E1, E2, E3, E4, and E6. The differences in core electrical parameters are as follows (taking UL standards as an example):

Model Rated continuous current (A) 480V Rated short-circuit current (kA) Number of poles Installation method Typical weight (kg/lbs, 3 poles fixed)

E1 800-1200 42 3/4 fixed/pull-out 50/110

E2 1200-1600 50 3/4 fixed/extracted 55/121

E3 1200-2500 65-100 3/4 fixed/pull-out 80/176

E4 3200-3600 65-100 3/4 fixed/withdrawable 89/196

E6 4000-5000 85-125 3/4 fixed/withdrawable 125/275

2. General technical specifications (shared by UL and IEC)

Voltage and Frequency: Rated maximum voltage 635VAC, rated operating voltage 600VAC, test voltage (50/60Hz for 1 minute) 2.2kV, applicable frequency 50-60Hz.

Temperature range: Operating temperature -5~+70 ° C, storage temperature -40~+70 ° C, suitable for different temperature zones in industrial sites.

Neutral pole rating: The neutral pole rating for E1-E3 models is 100% of the rated current, and for E4-E6 models it is 50% (special requirements can be consulted with the manufacturer to customize the 100% rating).

Mechanical and electrical lifespan: Mechanical lifespan (under routine maintenance) 20000-25000 operations, electrical lifespan (440VAC) 10000-30000 operations, with a maximum operating frequency of 60 times per hour.

Core functions and structural characteristics

1. Protection and control capability

Release Unit: Standard PR111/P series release, supporting LI (Long Delay Instantaneous), LSI (Long Delay Short Delay Instantaneous), and LSIG (Long Delay Short Delay Instantaneous Ground Fault) protection functions; PR112/P and PR113/P series are optional, suitable for more complex scenarios (such as PR112/PD supporting communication functions).

Operation time: The maximum closing time is 80ms, the maximum opening time (I<short-circuit withstand current) is 70ms, and the maximum (I>short-circuit withstand current) is 30ms. It can quickly respond to faults and reduce equipment damage.

Auxiliary functions: Comes with 2NO+2NC auxiliary contacts (for indication of opening and closing status), spring energy storage/release mechanical indicators, and manual opening and closing buttons; The pull-out model is equipped with a rocking in device with a closed door, a rocking in position indicator, and an anti insertion lock to enhance operational safety.

2. Installation and structural design

Size and Installation: Fixed 3-pole model with a height of approximately 418mm (16.46 inches) and a depth of 302mm (11.89 inches); The pull-out depth has been increased to 396.5mm (15.61 inches), supporting DIN rail or 19 inch rack installation (requires installation kit).

Terminal and wiring: default rear horizontal terminal, optional rear vertical, front terminal and other types (such as "HH" representing rear horizontal and "HV" representing rear horizontal vertical in the model), suitable for different switchgear wiring requirements; The terminal box is integrated with the current transformer (CT) to simplify on-site wiring.

Redundancy and reliability: The pull-out model is designed with a "mobile part+fixed part" separation, supporting hot swappable replacement; Key components such as sliding contacts and trip units have anti vibration capabilities (7.35 m/S ², 5-500Hz) and comply with ISA S71.04 G3 harsh environment standards.

Product configuration and optional accessories

1. Basic configuration classification

According to the operation mode and function, there are mainly two types of products:

Automatic air circuit breaker: including trip unit and current transformer, supporting fault protection such as overcurrent and short circuit, divided into fixed and withdrawable types, suitable for distribution circuits that require automatic protection.

Non automatic air circuit breaker (switch): no trip unit and CT, only used as a manual or electric power switch, also available in fixed/withdrawable type, suitable for simple circuits that do not require complex protection.

2. Optional attachments (UL and IEC compatible)

Attachment category, specific function and model, example usage

Electrical accessories include shunt release coil (KE6S0, 24VDC), closing coil (KE6C6110-120VAC), and spring energy storage motor (KE6M5110-130VAC/VDC) for remote opening and closing and automatic spring energy storage