time over-current relay

简明释义

时限过电流继电器

英英释义

例句

1.The time over-current relay is essential for protecting motors from overload conditions.

这个时间过电流继电器对于保护电动机免受过载情况至关重要。

2.In our power distribution system, the time over-current relay helps prevent damage to transformers.

在我们的电力分配系统中，时间过电流继电器有助于防止变压器损坏。

3.We installed a time over-current relay to enhance the safety of our electrical installations.

我们安装了一个时间过电流继电器以增强我们电气设施的安全性。

4.When the current exceeds the set limit, the time over-current relay activates the circuit breaker.

当电流超过设定限制时，时间过电流继电器会激活断路器。

5.The settings on the time over-current relay must be adjusted according to the load characteristics.

必须根据负载特性调整时间过电流继电器上的设置。

作文

The importance of protection devices in electrical systems cannot be overstated. Among these devices, the time over-current relay plays a crucial role in ensuring the safety and reliability of electrical installations. A time over-current relay is designed to monitor the current flowing through an electrical circuit and to operate when this current exceeds a predetermined threshold for a specified period of time. This functionality is essential for preventing damage to electrical equipment and ensuring the protection of both personnel and infrastructure.To understand the working principle of a time over-current relay, it is important to recognize its two main components: the current sensing element and the timing mechanism. The current sensing element continuously measures the current in the circuit. When the current exceeds the set limit, the timing mechanism begins to count down. If the over-current condition persists beyond the set time delay, the relay will trip, disconnecting the power supply to the affected circuit.The time over-current relay is particularly useful in industrial applications where heavy machinery operates. These machines often draw significant amounts of current, and a sudden increase in load can lead to an over-current situation. By using a time over-current relay, operators can ensure that the machinery is protected from potential damage caused by excessive current, thereby extending the lifespan of the equipment and reducing maintenance costs.Moreover, the time over-current relay can be adjusted to suit specific operational requirements. Different settings can be configured based on the characteristics of the electrical system and the equipment being protected. For instance, a motor may require a different time delay compared to a transformer due to their distinct operational behaviors during overload conditions. This flexibility allows engineers to tailor the protection scheme according to the specific needs of the installation.In addition to protecting equipment, the time over-current relay also enhances the safety of personnel working with or near electrical systems. In cases where an over-current condition could lead to overheating or even fire, the rapid response of the time over-current relay helps mitigate such risks. By quickly disconnecting power, it minimizes the chances of accidents and ensures a safer working environment.Furthermore, the integration of time over-current relays into modern electrical systems has been facilitated by advancements in technology. Many of today's relays come equipped with digital features that allow for remote monitoring and control. This capability enables operators to keep track of the system's performance and make adjustments as necessary, even from a distance. Such technological advancements have made the time over-current relay an indispensable component in smart electrical grids.In conclusion, the time over-current relay is a vital protective device in electrical engineering. Its ability to monitor current, apply time delays, and disconnect power under fault conditions makes it essential for safeguarding both equipment and personnel. As technology continues to evolve, the role of the time over-current relay will only become more significant, ensuring that electrical systems operate safely and efficiently. Understanding and implementing this device is crucial for anyone involved in electrical design and maintenance, as it provides a robust solution to one of the many challenges faced in the industry.

在电气系统中，保护设备的重要性不容忽视。在这些设备中，时间过流继电器在确保电气安装的安全性和可靠性方面发挥着至关重要的作用。时间过流继电器旨在监测电路中流动的电流，并在该电流超过预定阈值并持续一段指定时间后操作。这一功能对于防止电气设备损坏以及保护人员和基础设施至关重要。要理解时间过流继电器的工作原理，首先需要认识到它的两个主要组成部分：电流传感元件和计时机制。电流传感元件不断测量电路中的电流。当电流超过设定限制时，计时机制开始倒计时。如果过流状态持续超过设定的时间延迟，继电器将跳闸，断开受影响电路的电源。时间过流继电器在工业应用中尤为有用，因为重型机械的运行通常会消耗大量电流，而负载的突然增加可能导致过流情况。通过使用时间过流继电器，操作员可以确保机械设备免受过量电流造成的潜在损害，从而延长设备的使用寿命并降低维护成本。此外，时间过流继电器可以根据特定的操作要求进行调整。可以根据电气系统的特性和所保护设备的不同配置不同的设置。例如，由于电机与变压器在过载条件下的操作行为不同，因此它们可能需要不同的时间延迟。这种灵活性使工程师能够根据安装的具体需求量身定制保护方案。除了保护设备外，时间过流继电器还提高了与电气系统一起工作或在其附近工作的人员的安全性。在过流情况可能导致过热甚至火灾的情况下，时间过流继电器的快速响应有助于降低此类风险。通过迅速断开电源，它最小化了事故发生的机会，确保了一个更安全的工作环境。此外，随着技术的进步，时间过流继电器在现代电气系统中的集成得到了促进。许多今天的继电器配备了数字功能，允许远程监控和控制。这一能力使操作员能够跟踪系统的性能，并根据需要进行调整，即使在远处也是如此。这些技术进步使得时间过流继电器成为智能电网中不可或缺的组成部分。总之，时间过流继电器是电气工程中一种重要的保护设备。它监测电流、施加时间延迟并在故障条件下断开电源的能力，使其在保护设备和人员方面至关重要。随着技术的不断发展，时间过流继电器的角色只会变得更加重要，确保电气系统安全高效地运行。理解和实施这一设备对于参与电气设计和维护的任何人来说都是至关重要的，因为它提供了应对行业面临的众多挑战的强大解决方案。