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Electrical measuring instruments >> wattmeters, varmeters


9 000 RUB
2 460 UAH
4 pieces

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Wattmeter D57 (D 57, D-57).
Wattmeter D57 - a device with a six-limits for measurement of active electric power in single-phase AC, 50 Hz. The device is used as a model and accurate laboratory measurements.
Technical features of D57:
- Accuracy class - 0.1;
- Two-scale;
- The current in the device - 30mA;
- Voltage 220V;
- Available in 4 versions, with the following limits of current: 0.5 - 1A, 2 - 4A, 2.5 - 5 A, 5 - 10A.
Technical characteristics
By principle wattmeters D57 are ferrodinamicheskim devices. The basic error in all of the scale at nominal operating conditions does not exceed ± 1,5% of full scale value.
Rated power factor for power meter D57 cos φ = 1, the settling time moving part - ≤ 4 sec.
Changing the readings under the influence of different factors have the following meanings:
- By rejecting ambient temperature of 20 ± 5 ° C (class H) does not exceed ± 0,8% for every 10 degrees
- Under the influence of an external magnetic field of 400 A / m - not exceed ± 2,5%;
- Due to the influence of uneven phase load - not exceed ± 1,5%.
Average lifetime D57 at least 12 years
Wattmeters D57 correspond to GOST 8476-60 and TU 25-04-165-67
Terms of use of the appliance.
D57 wattmeter is used at an ambient temperature of -40 ° C to +50 ° C and relative humidity of 95% (at 35 ° C). Allows operation at a temperature of from -50 to +60 ° C and relative humidity of 95% (at 60 ° C). In terms of resistance to mechanical stress they are vibration and tryaskoprochnym.

Photos: D57

D57 device image.
D57 device image.
D57 front view.
D57 front view.
D57 side view.
D57 side view.
D57 rear view.
D57 rear view.
D57 overhead view.
D57 overhead view.
D57 bottom view.
D57 bottom view.