Опис
ЭВ0300 voltmeters are designed to measure the voltage in sinusoidal alternating current networks with a frequency from 45 Hz to 65 Hz. The devices are stationary analog indicators of the direct action of the electromagnetic system with the attachment of the moving part on the cores.
The devices are manufactured in accordance with the requirements of ДСТУ EN 60051-2:2018 Direct-acting electrical measuring analog devices, indicators and auxiliary parts to them. Part 2. Special requirements for ammeters and voltmeters.In terms of safety requirements, the devices meet the requirements of DSTU EN 61010-1:2014 Requirements for the safety of control and measuring and laboratory electrical equipment. Part 1. General requirements.
Note: By type of activity, the device does not belong to the scope of legally regulated metrology. According to the Law of Ukraine On Metrology and Metrological Activities and in connection with the entry into force of the Law of Ukraine On Amendments to Certain Legislative Acts of Ukraine on the Implementation of European Union Legislation Acts in the Field of Technical Regulation from 03.07.2019 (Article 1 Clause 15, Article 16, Clause 1 of the Law of Ukraine On Metrology and Metrological Activities initial verification is not provided for these types of FTAs.
The accuracy class of devices is 1.5 or 2.5 according to ДСТУ OIML R 34:2014 Accuracy classes of measuring equipment.
The limits of the permissible reduced basic error of devices are ±1.5% for devices of accuracy class 1.5 and ±2.5% for devices of accuracy class 2.5 of the final value of the measurement range.
The main and additional error of devices connected through measuring transformers are normalized without taking into account the corresponding errors of the measuring transformers.
The final values of the measurement ranges are given in the table:
|
The final value of the measurement range of the connected voltmeters
|
|
|
directly |
through a voltage transformer |
| 7,5 V, 10 V, 15 V, 20 V, 30 V, 50 V, 75 V, 100 V, 150 V, 250 V, 500 V, 600 V |
3000 V, 7500 V, 10000 V, 12500 V, 20000 V, 35000 V, 60000 V, 125000 V |
Note 1: Depending on the order, voltmeters with a final value of the measuring range of 1000 V can be manufactured as kilovoltmeters.
|
|
The initial value of the measuring range does not exceed 20% of the final value of the measuring range
Own consumption of devices:
– direct connection voltmeters of no more than 5 V·A;
– voltmeters connected through a voltage transformer, (4±1.5) V·A.
Degree of protection IP40 according to ДСТУ EN 60529:2014 Degrees of protection provided by casings (IP).
The overall dimensions and length of the instrument scale, depending on the modification (execution), correspond to the values given in the table:
|
Modification (execution) |
Overall dimensions, mm | Scale length, mm | Mass, kg |
|
ЭВ0300-2 |
96×96х62 | 90 |
0,3 |
| ЭВ0300-3 | 72×72х62 | 60 |
0,2 |
The norm of average working time before failure is 10,000 h.
The average term of service is 10 years.
Devices can be attached to shields up to 8 mm thick.
Installation dimensions for mounting to the shield:
|
Device |
С, mm |
|
ЭВ0300-2 |
92+0,8 |
| ЭВ0300-3 |
68+0,7 |
The method of attaching devices to the shield:
