The TZY-DT08 voltage monitoring instrument is a power grid voltage quality monitoring and statistical instrument. It can convert and process the read voltage signals, automatically monitor, calculate and analyze various statistical values under synchronous clock control, and store them for users to choose and read. It can collect, display, classify and statistically analyze multiple voltage signals (PT output~100V, 220V, 380V), and can simultaneously monitor the voltage quality of three power grids. It is one of the means of monitoring and assessing the voltage quality of power grids in the power system.

The TZY-DT-08 voltage monitor adopts a novel and exquisite structure, with a clean appearance, excellent craftsmanship, easy installation, and convenient use. Due to the use of single-chip microcomputers and large-scale IC and SMT surface mount technology in electronic components, and years of market application and baptism, it has been proven that the instrument has strong functionality and high reliability.

2.1 Statistical Object

It can collect, display, and classify high-voltage power grid voltage signals of 3KV and above, 220V voltage, or 380V voltage signals that are transformed into PT~100V.

2.2 Statistical Forms

The instrument automatically classifies and calculates data by time, day, and month.

2.3 Statistical Items and Functions

This includes monthly statistics, daily statistics, hourly statistics, hourly statistics, and records of power outages. The upper and lower limits of the warning can be set separately, and an alarm output will be generated when the instantaneous pressure value warning upper and lower limits are reached. It has a manual correction function for measured values, a "watchdog" function, reliable program operation, and password protection before entering parameter settings to prevent abnormal operations.

2.4 Display format: LED digital tube display

2.5 Sampling period: 250ms

2.6 Display cycle: 1s

2.7 Statistical cycle: 1 minute

2.8 Accuracy

Measurement range: Un ± 20% (AC)

Comprehensive measurement error: ≤ 0.5%

Clock error: ≤± 0.5/s/d

2.9 Resolution: ≤ 0.01%

2.10 Signal input circuit power consumption: ≤ 0.6VA

2.11 Power circuit power consumption: ≤ 2VA

2.12 Insulation resistance: ≥ 500 megaohms

2.13 Power frequency withstand voltage strength: 1.5KV, no breakdown for 1 minute

2.14 E2PROM stores important data: retention period of 100 years

2.15 Communication media RS485/GSM (short message)/GPRS

2.16 Normal working environment

Environmental temperature: -40 ℃ to+70 ℃

Relative humidity: 90% at+45 ℃

Atmospheric pressure: 79.5-10.60kpa (altitude 2000m and below).

2.17 Power supply mode: tested power supply and auxiliary power supply

2.18 Installation method: Hanging type

3.1 Carefully connect the wires according to the designated wiring positions to prevent electric shock or other accidents.

3.2 The AC power supply used for this instrument must be 50HZ ± 1HZ. The AC voltage within the rated value Ug ± 20% should be based on the actual power supply voltage indicated on the instrument. Excessive or insufficient AC voltage will cause the instrument to malfunction.

3.3 Instruments should not be installed in highly corrosive environments and should be protected from large vibrations during installation.