继电器触点和线圈之间应该屏蔽，以使继电器电源引起的感应噪声最小。
Relay contacts should be shielded from the coil to minimize induced noise from the relay power supply.
介绍了用于电压继电器动作特性测试的可程控交流电源。
A programmable power supply which tests action characteristic of voltage relay is presented.
论述了无需直流辅助电源、用厚膜电路构成的静态型电流和电压继电器。
The static current and voltage relays made of solid state circuit and without DC auxiliary supply are presented.
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