METRIX振动开关450DR-2044-0100技术参数
Series | 450 |
Number of Alarm Setpoints | DR = Two alarm setpoints |
Analog Proportional Output | 2 = 4-20 mA(absolute) |
Scale Range | 0 = 0.1 – 1.5 in/sec (derived peak) |
Shutdown Circuit Output | 4 = Electromechanical relay (10A, SPDT) |
Alarm Circuit Output | 4 = Electromechanical relay (10A, SPDT) |
Housing / Approvals | 0 = |
Input Power | 1 = 230 Vac, 50/60 Hz |
Power-up Timed Inhibit (i.e., LOCKOUT) | 0 = None |
Transducer Option | 0 = Internal Accelerometer |
METRIX振动开关450系列介绍
电子开关采用固态晶体加速度计，当其因振动力而变形时，会提供电输出。输出以电子方式转换为与速度成比例的信号。该信号与预设限值进行比较，如果超过限值，则触发固态继电器。440 振动开关中没有移动部件，除非配置了机械继电器。
开关的一个重要特性是内置延时。这可以防止因振动水平瞬时增加而触发警报或关机功能。它还可以避免因启动期间发生的瞬时振动而关机。
几乎所有机器在启动时都会经历几秒钟的高振动，然后才能达到运行速度。当没有延时功能时，就像机械开关一样，这种启动振动会导致跳闸。操作员经常会调高跳闸设置，直到他能够完成启动。由此产生的跳闸水平太高，无法在机器的运行速度下提供保护。
三秒警报跳闸延迟是开关的标准配置。警报时间延迟可在现场独立调整，范围为 2 到 15 秒。
The electronic switch utilizes a solid state crystal accelerometer which provides an electrical output when it is deformed by the vibration forces. The output is electronically converted to a signal proportional to velocity. This signal is compared with a preset limit and triggers a solid state relay if the limit is exceeded. There are no moving parts in the 440 vibration switches except when configured with mechanical relays.
An important feature of the switch is the built-in time delay. This prevents triggering of the alarm or shutdown functions from transient increases in vibration levels. It also avoids shutdown due to transitory vibrations occurring during start-up.
Almost all machines experience a few seconds of high vibration during start-up before reaching operating speed. When no time delay function is included, as with mechanical switches, this start-up vibration causes a trip. Frequently, the operator turns the trip setting up until he can get through start-up. The resultant trip level is too high to afford protection at the machine’s operating speed.
Three-second alarm trip delay is standard on the switch. Alarm time delays are independently adjustable in the field over a range of 2 to 15 seconds.
METRIX振动开关450系列选型
METRIX振动开关450系列其他常用型号：
METRIX 450DR-2022-0200
METRIX 450DR-2222-0100
METRIX 450DR-2122-0100
METRIX 450DR-2222-9120
METRIX 450DR-2144-0100
METRIX 450DR-2122-0000
METRIX 450DR-2044-0100
METRIX VIBRATION SWITCH NEW + ORIGINAL+ ONE YEAR WARRANTY
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METRIX振动开关450系列450DR-2044-0100技术参数及选型
