Wattmeter D85, D85 kilovattmetr (D 85, D-85)
Wattmeter D85, D85 kilovattmetr designed to measure active and reactive power in three-phase AC circuits, 50 Hz.
Dimensions - 80h80h95mm.
Accuracy class - 2.5.
Resistant to shaking, vibration.
Technical characteristics of the devices wattmeters D85, D85 kilovattmetry:
Instruments used in ambient temperatures from -50 º C to +60 ° C and relative humidity of 98% (at 35 ° C).
Execution of instruments wattmeter D85, D85 kilovattmetr - conventional and tropical.
The limits of measurement and how to include wattmeters are given in Table 1.
Table 1: Limits and measurement method of use, power meter D85, D85 kilovattmetr
Rated voltage of the generator, in which the circuit can be switched on power meter, 230V or 400V.
Sequential circuit devices wattmeter D85, D85 kilovattmetr included in the network via current transformers with 5A secondary winding.
Parallel chains of wattmeters are included in the network through individual resistance-type P700.
Rated frequency of instrumentation wattmeter D85, D85 kilovattmetr 50Hz, rated active power factor cosγ = 0,8.
The basic error in all the marks of the measurement range does not exceed ± 2,5% of full scale value amounts.
Changing the power meter readings of D85, D85 kilovattmetr caused by the deviation of temperature from 20 º C ± 5 ° C (ranging from -50 º C to +60 ° C) does not exceed ± l, 2% for every 10 degrees;
- Under the influence of external magnetic field strength of 400 A / m - not more than ± 2,5%;
- With deviation from the nominal voltage of ± 20% - less than ± 2,5%.
Settling time of the mobile device wattmeter D85, D85 kilovattmetr - ≤ 4 sec.
Scale length - 48mm.
Angle scale - 90 °.
The scale of the instrument wattmeter D85, D85 kilovattmetr - uniform.
Weight of the device along with a separate additional resistance does not exceed 1.3 kg.
Fastening devices wattmeter D85, D85 kilovattmetr - flange.
The plastic body of the instrument and the additional resistance prevents wattmeters from mechanical damage and is dust-and splash-proof.
The device wattmeter D85, D85 kilovattmetr consists of the following structural units: a measuring mechanism, a base cover.