The internal part of the relay protection tester is an electronic circuit, which is susceptible to interference from strong electric field and strong magnetic field. The grounding shield of the shell is conducive to improving the working environment of the relay protection tester. The microcomputer protection should improve the reliability of the relay protection tester.
继电保护测试仪也称为六相继电保护测试仪，内部部分是电子电路，易受到强电场和强磁场的干扰，壳体接地屏蔽有利于改善继电保护测试仪的工作环境，微机保护应提高继电保护仪的可靠性。
In order to ensure the reliability of the microcomputer relay protection tester, it is necessary to suppress the interference source, block the coupling channel, improve the anti-interference ability of the sensitive circuit, adopt automatic detection technology and fault tolerance design to ensure the reliability of the microcomputer to ensure that the relay protection tester device stops running.
为了保证微机继电保护测试仪的可靠性，应通过抑制干扰源、阻断耦合通道、提高敏感电路的抗干扰能力、采用自动检测技术和容错设计来保证微机其可靠性，以确保继电保护测试仪装置停止运行。
The relay protection tester is the main electrical equipment of the power system, which is related to the safe and stable operation of the whole power system.
继电保护测试仪是电力体系的主要电气设备，关系到全部电力体系的安全安稳运转。
With the continuous expansion of power system planning, the wide use of ultra-high voltage and large capacity transformers puts forward higher requirements for the performance of transformer protection.
随着电力体系规划的不断扩大，超高压大容量变压器的广泛使用，对变压器保护的性能提出了更高请求。
In the past ten years, the use of microcomputer skills has promoted the development of transformer protection principles and completion skills.
近十多年来，微机技能的使用，推动了变压器保护原理和完成技能的开展。
The fundamental function of transformer relay protection is to protect the safety of the transformer, to act quickly and reliably on the switch trip when the transformer has internal faults or external faults, to remove the fault point, to ensure the safe operation of the power system, and to prevent the transformer from damage.
变压器继电保护的根本功用是保护变压器的安全，在变压器发作内部毛病或外部毛病时能敏捷、可靠动作于开关跳闸，切除毛病点，确保电力体系安全运转，并使变压器免受损毁。
The differential protection of the relay protection tester allows all the secondary side of the current transformer to choose Y-shaped connection, and its current phase and amplitude offset coefficient are completed by the software, which makes the debugging, setting and operation protection very convenient.
继电保护测试仪的差动保护允许一切的电流互感器二次侧选用Y形接线，其电流相位和幅值抵偿系数均由软件主动完成，这使得保护的调试，整定，运转保护非常便利。
The new type of transformer protection software uses the power frequency change ratio differential element to enhance the detection sensitivity of small current faults in the transformer.
新型变压器微机保护软件选用工频改变量比率差动元件，增强了变压器内部小电流毛病的检查灵敏度。
The selection of multi-CPU microcomputer protection makes the backup protection of the transformer independently equipped and run independently with the main protection of the transformer and the man-machine interface, which improves the protection conditions of the protection operation and enhances the reliability of the protection.
多cpu微机保护的选用，使变压器的后备保护按侧独立装备并与变压器主保护，人机接口办理彼此独立运行，改进了保护运转的保护条件，同时也增强了保护的可靠性。
