IEEE 继电保护代码中英文对照（21-30）

基于IEEE Std C37.2?-2008翻译校准标准和电气工程术语

成功不需要在我身上，但是功力不需要唐捐 —— 胡适

3.1.21 Device number 21—distance relay

A device that functions when the circuit admittance, impedance, or reactance increases or decreases beyond a predetermined value.

21-距离继电器

当电路导纳、阻抗或电抗增加或减少超过预定值时起作用的装置。

3.1.22 Device number 22—equalizer circuit breaker

A device that serves to control or make and break the equalizer or the current balancing connections for a machine field, or for regulating equipment, in a multi-unit installation.

22-平衡电路断路器

均衡器或电流平衡连接用于控制、连接或切断电机磁场或调节设备。

3.1.23 Device number 23—temperature control device

A device that functions to control the temperature of a machine or other apparatus, or of any medium, when its temperature falls below or rises above a predetermined value.

NOTE—An example is a thermostat that switches on a space heater in a switchgear assembly when the temperature falls to a predetermined value. This should be distinguished from a device that is used to provide automatic temperature regulation between close limits, which would be designated as device function 90T.

23-温度控制元件

当机器（电机）或其他设备或任何介质的温度低于或高于预定值时，用来控制其温度的装置。

注意:例如，当温度下降到预定值时，开关柜组件中的空间加热器将启动恒温器。这不同于要求温度值在严格限度内提供自动温度调节的装置，该装置的代码是90T，以示区别。

3.1.24 Device number 24—volts per Hertz relay

A device that operates when the ratio of voltage to frequency is above a preset value or is below a different preset value. The relay may have any combination of instantaneous or time-delayed characteristics.

24-电压/频率继电器

当电压与频率之比高于或低于预定值时。继电器具有瞬时或延迟特性。

3.1.25 Device number 25—synchronizing or synchronism-check relay

A synchronizing device that produces an output that causes closure of a circuit breaker between twocircuits whose voltages are within prescribed limits of magnitude, phase angle, and frequency. It may or may not include voltage or speed control. A synchronism-check relay permits the paralleling of two circuits that are within prescribed (usually wider) limits of voltage magnitude, phase angle, and frequency.

25-同步或同时检查装置

同步装置产生输出，在振幅值、相位角和频率范围内关闭两个电路之间的断路器。 它不一定有电压或速度控制。 同时检查继电器允许规定电压振幅值、相位角和频率(通常较宽)两条电路并联在范围内。

3.1.26 Device number 26—apparatus thermal device

A device that functions when the temperature of the protected apparatus (other than the load-carrying windings of machines and transformers as covered by device function number 49), or that of a liquid orother medium, exceeds a predetermined value; or when the temperature of the protected apparatus or that of a liquid or other medium,exceeds a predetermined value or decreases below a predetermined value.

26-设备热元件

当受保护装置的温度（不包括电机和变压器的负载绕组）或液体或其他介质超过预定值时； 或当受保护装置或液体或其它介质的温度超过预定值或下降到预定值以下时。

3.1.27 Device number 27—undervoltage relay

A device that operates when its input voltage is less than a predetermined value.

27-低电压继电器

是一种在低于电压定值下动作的元件。

3.1.28 Device number 28—flame detector

A device that monitors the presence of the pilot or main flame in such apparatus as a gas turbine or a steam boiler.

28-火焰监测器

一种在燃气轮机或蒸汽锅炉等一类的设备中监测引燃器或主火焰是否存在的装置。 

3.1.29 Device number 29—isolating contactor or switch

A device that is used expressly for disconnecting one circuit from another for the purposes of emergency operation, maintenance, or testing.

29-隔离接触器或开关

一种装置，为了事故运行、维护或测试的目的，将一个回路与其他回路明显隔离开。 

3.1.30 Device number 30—annunciator relay

A nonautomatically reset device that gives a number of separate visual indications upon the functioning of protective devices and that may also be arranged to perform a lockout function.

30-信号继电器

一种非自动复归元件，它在保护动作时给出直观的显示同时也可以用来执行闭锁功能。