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Electrical measuring instruments >> analog panel meters >> wattmeters and varmeter >> power meter, varmeter three-phase


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Wattmeter D351, D351 varmeter (D 351, D-351)
Wattmeter D351, D351 varmeter designed to measure active and reactive power in three-phase AC 50Hz.
Dimensions - 144h144h83mm.
Class of accuracy - ± 1,5.
Technical characteristics of the devices wattmeters D351, D351 varmeter:
Limiting error - ± 1,5% of the measuring range;
Variation of evidence - not more than 1.5% of range;
Failure to return the instrument needle wattmeter D351, D351 varmeter to zero - not more than 2.0 mm;
The devices are intended for inclusion in the network, directly to the rated current and rated voltage of 127V, 220V and 380V, and a current transformer with a secondary winding on the 5A or 1A and voltage transformers with a secondary winding to 100V;
Rated power (final range value) device wattmeter D351, D351 in varmeter vatah for wattmeters and Vary for varmeter set as the product of rated current in amperes, rated supply voltage, rated power factor and the factor with the resulting product rounded to the nearest appropriate P series:
P = a * 10 n,
where a - one of the numbers 1, 1.2, 1.5, 2, 2.5, 3, 4, 5, 6, 8, n - any positive number, but not less than 2;
Rated active power factor cosφ = 1 and reactive power sinφ = 1;
Operating position of the instrument power meter D351, D351 varmeter - vertical;
Settling time moving part - 4c;
Admissible additional instrument error wattmeter D351, D351 varmeter caused by the magnetic field strength of 400 A, 50 Hz / m - not more than 2.5%;
Scale length - 138mm;
Overall dimensions wattmeter D351, D351 varmeter - 144h144h83mm;
Weight - 1.0 kg;
The manufacturer guarantees that the quality of the instrument wattmeter D351, D351 varmeter technical requirements specifications provided the customer terms and conditions of storage, transportation, installation, operation, and its specified operational documentation.