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产品详情
NGD-255Voltage monitor
NGD-255 voltage monitor the use of innovative design exquisite structure, neat appearance, sophisticated technology, easy to install, easy to use. Due to large-scale IC and SMT components using surface mount technology, and after years of market applications with high reliability. It can be read into a voltage signal conversion processing, under the control of the clock synchronization, automatic monitoring, statistics and analysis of the statistics and stores for users to choose to read out, a variety of voltage signal (PT ~ 100V output , 220V, 380V) for the collection, display, classification statistics, is the power system monitoring, assessment grid voltage quality
The performance index
Display: LED digital tube / liquid crystal display
The sampling period: 250ms
Display in a cycle: 1s
Statistical period: 1min
Accuracy
Measuring range: Un ± 20% (AC)
Comprehensive measurement error: ≤ 0.5%
The clock error: < ± 0.5s/d
Resolution: ≤ 0.01%
The signal input circuit power consumption: ≤ 0.6VA
The power supply circuit power consumption: ≤ 2VA
Insulation resistance: ≥ 500000000000000 Euro
The compressive strength of frequency: 2KV, not 1min breakdown
E2PROM storage of important data, retention period of 100 years.
The communication medium (SMS) /GPRS RS485/GSM
Work environment
A) environment temperature: -40 ℃ ~ +70 ℃
B): +45 ℃, relative humidity 90%
C) atmospheric pressure: 79.5 ~ 106.0kpa (2000m above sea level and below).
Power supply: the measured power supply and auxiliary power supply.
Detection circuit: a road, two road, three road (specify when ordering)
Device characteristics
Display mode: Six bit digital tube digital display or LCD four rows of Chinese display, full Chinese menu, key check.
The anti-interference design of high strength, application of photoelectric isolation and military level device, the voltage monitor in the outdoor environment can run safely.
The multi task management system, in which data acquisition under normal circumstances, can run various components of real-time monitoring system. If an exception occurs,
System of automatic protection, guarantee the security of data.
Monitor the data acquisition module adopts the most advanced cooperative (consensus) filtering algorithm, can the system voltage filtering random noise, improve the collection
Precision, and has the function of data backup is safe and reliable, can ensure the reliability and validity of the data, in the domestic leading level.
SMS module using real-time monitoring function, the task scheduling algorithm, real-time monitoring of signal strength, the online status, internal state, in the guarantee in real time
The premise, make the communication more reliable, stable.
1 monitor power failure or multiple monitor power outage alarm information, immediately to the designated mobile phone or computer system sends (set by the host computer), with SIM
Card protection function (optional).
Can satellite time by setting system (GSM/GPRS).
Measurement circuit, can simultaneously monitor 1 road, 2 Road, 3 road bus voltage or 1-3 phase voltage.
Means of communication
A 485 communication mode: can provide communication two development kits, embedded software of substation automation system;
Network online mode based on TCP/IP protocol, a condition (such as substation) can realize the cable timely monitor dynamic data;
GSM SMS reading mode: each monitoring point of a SIM card, without distance limitations, the data using a mobile network signal and the central message processor to copy,
Have a satellite time, system data modifications back propagation, power failure alarm function.
GPRS mobile network online reading methods, reading data timely monitor
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