Also, this device can be called: D-539K, D 539K, D-539-K, D 539 K.
D539K wattmeter is used in measuring the composition of K50 kit for measuring active and reactive power in single and three-phase, three-and four-wire alternating current.
Dimensions - 140×140×100 mm.
Accuracy class - 0,5.
Measuring range - from 0 to 150 Watt.
Rated current series circuit - 5A.
Rated current parallel circuit - 3 mA.
Nominal frequency range - 45 Hz to 65 Hz.
Extended frequency range - 65 Hz to 500 Hz.
Resistance wattmeter - 0,002 Ohm.
Indication error when working without a power meter block I508M, expressed as a percentage of the final value of the working end of the scale:
- In the nominal frequency range - less than ±0,5%;
- In the extended frequency range - less than ±1%.
Error reading wattmeter D539K while handling the I508M, expressed as a percentage of the final value of the working end of the scale:
- In the nominal frequency range - less than ±0,7%;
- In the extended frequency range - less than ±1,4%.
Rated power factor wattmeter - 1.
Settling time - no more than 4 seconds.
Counteracting moment stretching PlSr-20 on 100 mm length - 0,45 mg·sm/90 °.
Tension stretch - 65 +5 g.
Counteracting moment springs - 9 mg·sm/90 14 °.
Mass wattmeter - 1 kg.
Operating conditions D539K:
The ambient air temperature - from 0° C to +35° C.
Humidity - 90%.