- Country of manufactureRussia
Test high-voltage device AB-50/70P of production of LLC Molniya-Belgorod.
On the limit technical characteristics the device AB-50/70P does not differ from AB-50/70. The main difference of these devices consists in much smaller weight of the high-voltage block (30 kg - the weight of the high-voltage AB-50/70P block and 50 kg - the device AB-50/70)
Besides in the Device AB-50/70P it is provided measurements of current and test tension in a high-voltage chain of a source of tension. It allowed to improve considerably the accuracy of measurements of output parameters and to increase safety of work as data on current and tension will come to the control unit on a radio channel.
Nearly ten years are in production the device high-voltage AB-50/70. About 500 pieces of such products were during this time let out. The device proved as the simple and reliable device. The aspiration of developers to reduce overall dimensions and weight, to increase safety of carrying out tests, to refuse use of the high-voltage switchboard, to increase the number of controlled output parameters and to increase their accuracy of measurement was the purpose of modernization of the device AB-50/70.
Appearance of the device AB-50/70P is shown in drawing.
BU control unit
BV high-voltage block
The module measuring CMIHP (Current Measuring Instrument High-potential) - removable
The resistor is current-limiting
About control unit elements
In the control unit governing bodies, the autotransformer, reception radio the module and two indicators of output signals (the indicator of current and tension) are placed.
About elements of the high-voltage block
In a tank of the BV high-voltage block figure 1, in oil is located the raising transformer. All other elements of the high-voltage block are located on a cover of the block and can be easily replaced or repaired without special devices and tools. Such design allowed to reduce dimensions of the block and its weight.
On the divider case 8 (figure 1) the module settles down measuring 3 (figure 1). It is equipped with the bayonetny socket and can be easily dismantled for a charge of accumulators. In the case of the measuring module also current-measuring shunt and a low-voltage shoulder of a divider of tension are located. On the ITV top plug the current-limiting resistor 6 (figure 1) is installed.
For obtaining constant test tension the operator has to install in a nest of the high-voltage block the diode 4 (figure 1), and for variable a crossing point 5 (figure 1). (Structurally they are executed in identical cases.)
One of distinctive features of the device "AB-50/70P" is the increased accuracy of measurements. The measuring shunt is located directly in a high-voltage chain and measures only loading current (current of loading is measured in the majority of similar devices together with divider current, and then this signal is processed for subtraction of current of a divider).
The measured sizes in a digital form are transferred to the control unit and there are automatically processed. The device defines a type of test tension (variable or constant), the level of pulsations of output constant tension and displays value of current and tension.
At excess of extreme output sizes of current and tension, the device is switched-off and grounds object of tests by means of a korotkozamykatel. At the same time on a board of the control unit the last values of these sizes will be displayed.
Technical characteristics of the device AB-50/70P:
- A test alternating voltage of 50 Hz, kV – 50;
- The test constant tension of negative polarity, kV – 70;
- The maximum current of loading, ma – 40;
- Dimensions of the high-voltage block, mm – 325х250х600;
- Dimensions of the control unit, mm – 395х350х180;
- The weight of the high-voltage block, kg – 32;
- The weight of the control unit, kg – 12,5.
The device "AB-50/70P" is the simplest device from this row. The device "AB-50/70PM" (modification) is equipped with the microprocessor module allowing to set all parameters of tests (speed of rise in tension, frequency of test tension, extreme size of current of loading, time of tests). Besides, in the course of tests the operator can control and write down on a removable data carrier, values of capacity or resistance of object of tests.
The family of devices AV – allows release of devices with other opportunities at the request of the Customer.
So devices can be added with the adjusted throttle and to provide test of objects with the increased electric capacity an alternating voltage.
By individual orders it is possible to change also output parameters in wide limits (to 100 kV of variable and 140 kV of constant tension, and loading current, to 100ma).
- BU control unit
- BV high-voltage block
- Module measuring ITV (removable)
- High-voltage diode
- Crossing point
- The resistor is current-limiting
- Tension divider