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球探手机比分 > 球探手机比分 > 新闻速递 > 三相数显电压表知识小问答... You are here : Home > News > News Express > Three-phase digital voltmeter knowledge quiz ...
Knowledge quiz on three-phase digital display voltmeter
Author: Yueqing City and Electric Co., Ltd. Posted on: 2016-01-29 Hits:
Three-phase digital voltmeter
1. What is the signal input of the three-phase digital voltmeter?
Answer: Voltage, 0 ~ 450V, 100V after high voltage change, direct input current, input power factor table after transformer change of 0 ~ 5A or 1A: voltage 50 ~ 450V, current 0.5 ~ 5A. This is probably a three-phase digital voltmeter manufacturer. If you want to know the input signal of the three-phase digital display voltmeter produced by our company, please contact this QQ: 418003225, hoping to help you.
2. Does the input signal of the three-phase digital voltmeter include a voltage signal or a current signal? What is the difference?
Answer: The input of the digital ammeter is to measure the voltage drop on the shunt or transformer into current. If you want to measure the voltage, you just need to cancel the shunt or transformer and determine the range with a suitable voltage-dividing resistor.
3. How to zero the voltmeter and ammeter?
Answer: The pointer meter is mechanically zeroed. Turn the zeroing screw with a screwdriver so that the pointer is on the zero scale. The digital meter can't be adjusted by general novice users, and needs to be operated and debugged under the guidance of manufacturers or professionals.
This article was edited by Yueqing Renhe Electrical Technology Co., Ltd. Please indicate http://cdzll.com/
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