1.1 Product destination 1.1.1 Measuring AC and DC high-potential series ITV-140R (hereinafter & ndash; & quot ; meters & quot;) designed for measuring direct and alternating sinusoidal current frequency of 50-60 Hz of up to 3 mA (ITV-140R-3), 9 mA (ITV-140R-9) and 30 mA (ITV-140R-30) in chains under the potential of up to 140 kV.
1.1.2 Feature of meters is the lack of a galvanic connection between the high potential and low potential indicator measuring circuits, which ensures complete safety of operation.
1.1.3 measuring instruments intended for use in the composition of the test plants indoors in a temperature range from + 5 ° C to + 40S, relative humidity to 90% at 25S and a pressure of from 630 to 800 mm Hg. v.
1.1.4 On site installation is not permitted shaking, vibrations, presence of vapor in the air corrosive fluids (acids, alkalis, etc.).
1.1.5 product may operated by one operator from among electricians persons having access to carry out works in systems with voltages higher than 1000.
1.1.6 Version 3 meters corresponds to a group of devices in accordance with GOST 22261.
1.2 The basic specifications
1.2.1 The working range of the measured currents is shown in table 1.
table 1 | meter Design | ITV-140R-3 | ITV-140R-9 < / p> | ITV-140R-30 |
| The operating range of the measured currents, mA < / td> | 0,010 & ndash; 3,000 | 0,030 & ndash; 9,000 | 0,10 & ndash; 30,00 NOTE: & ndash; meters measure the mean (srednevypryamlennoe) DC value and RMS value of the AC 50-60 Hz 1.2.2 Bandwidth ac Hz -. 0-1000 1.2. 3 Input resistance BW given in table 2. table 2 | Design meter | ITV-140R-3 | ITV-140R-9 | ITV-140R-30 | | impedance, ohms | 232 < /td> | 78 | 23 | 1.2.4 limit of absolute error measuring the operating range measured currents and temperatures is determined by the formula: = 0,01 ∙ ix + 5 e.m.r. (1) where, ix & ndash; value of measured current in mA; e.m.r. & Ndash; . Unit LSB 1.2.5 Resolution reference mA & ndash; 0,001 1.2.6 Performance & ndash; Two measurements per second 1.2.7 radio frequency range, MHz, 845-945 1.2.8 number of frequency channels 16 1.2.9 Transmitter power, 1 mW 1.2.10 radio range (open space) m - 5-10 1.2.11 meter withstands overload current single pulse duration of 10 ms and an amplitude of not more than 150 A. 1.2.12 Nutrition BV and MI produced from embedded Ni-MH AA size battery voltage of 1.2 V and a capacity of 2.1 A ∙ h. 1.2.13 voltage power & ndash; 5B, the duration of continuous operation without recharging & ndash; at least 8 h 1.2.14 dimensions / mass: & bull;. ITV block high-potential-140R-BV - 170h100 mm diameter / 1 kg; & bull; module indicator ITV3-MI - 95h190h40mm / 0.5 kg 1.2.15 Product life & ndash; 10 years
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