The circuit breaker is an important protection device in the power system, which is used to disconnect or connect the power supply in the circuit. Different circuit breaker models are suitable for different circuit and engineering needs, with their own specific parameters and performance. This article will introduce the basic models and parameters of circuit breakers to help readers understand the different types of circuit breakers and their technical indicators.
1. Common types of circuit breakers
(1) Air switch circuit breaker: Air switch circuit breaker is a commonly used type of circuit breaker, suitable for overload and short circuit protection in low-voltage circuits.
(2) Load switch circuit breaker: The load switch circuit breaker is used to control and protect the motor and load equipment in the low-voltage circuit, and has overload and short circuit protection functions.
(3) Isolating switch circuit breaker: Isolating switch circuit breaker is used to break and isolate in the circuit, usually used to repair and overhaul electrical equipment.
(4) Leakage circuit breaker: Leakage circuit breaker is a circuit breaker specially used to protect personal safety, which can quickly cut off the circuit to prevent electric shock accidents.
2. Basic parameters of circuit breaker
(1) Rated voltage (Rated Voltage): The maximum voltage value that the circuit breaker can work normally, usually in volts (V).
(2) Rated current (Rated Current): The maximum current value that the circuit breaker can work normally, usually in amperes (A).
(3) Short-circuit current withstand capacity (Short-Circuit Withstand Capacity): The peak value of short-circuit current that the circuit breaker can withstand, usually in thousands of amperes (kA).
(4) Dynamic stability current (Dynamic Stability Current): The short-term short-circuit current value that the circuit breaker can withstand, usually in kiloamperes (kA).
(5) Trip characteristics (Tripping Characteristic): The trip characteristics of circuit breakers are divided into thermal overload trip and short circuit trip. Select the appropriate trip characteristics according to different protection requirements.
(6) Use ambient temperature (Operating Temperature): The ambient temperature range within which the circuit breaker can work normally, usually expressed in degrees Celsius (°C).
3. Common circuit Breaker features of the model
(1) ABB circuit breaker: ABB is a world-renowned manufacturer of electrical equipment. Its circuit breakers have high reliability and stability, and are suitable for industrial and civil circuits.
(2) Schneider circuit breaker: Schneider Electric is a well-known provider of electrical automation solutions. Its circuit breakers have advanced technology and reliable performance.
(3) Siemens circuit breaker: Siemens is the world's leading provider of industrial automation and digital solutions, and its circuit breakers have excellent quality and performance.
