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td4550 portable calibrating apparatus for three-phase meters 专用于检定三相交流电能表、功率表的便携式仪器
准确度为 0.02 级 / 0.05 级 / 0.1 级可选
三相标准源输出最大 456 v / 120 a，各种负载下均能保证量值输出稳定
电流输出最小达 2 ma，是被检电能表进行起动试验的基础
overview
td4550 is a portable apparatus specially applied to the verification of three-phase meters and wattmeters, the accuracy is 0.02/0.05/0.1 optional. it can accomplish the test items including the basic error test, start-up test, latent test, meter constant, standard deviation, frequency and harmonic effect test and so on.reference standards are gb/t 11150-2001、jjg 597-2005、jjg 307-2006、jjg 596-2012.
features
● the maximum ac output capacity is 456 v/120 a, which can ensure the stability of output value at full load.
● the minimum ac current output to 2 ma, which is the basis for start-up test of the verified meter.
● the magnitude adjusting has methods of rotary encoder, bit adjustment and step ratio. it can be adjusted by three-phase system or phase separation. the three phase parameters can be adjusted uniformly or separately.
● phasor diagram display: the phase between the three-phase electric parameters can be arbitrarily adjusted and displayed through the form of phasor diagram.
● man-machine function: the workbench is equipped with large size and high-definition lcd, which is intuitive and convenient for operation.
● harmonic function (options): it can load 2nd-21st harmonic with adjustable amplitude and phase to complete the harmonic influence test.
● proprietary software: semi-automatic and full-automatic verification is supported, so as data management and certificate export.
applications (class 0.05)
technical specifications
ac voltage/current output
output characteristics：
● range of voltage: 0 v～264v
● range of current: 0.1 ma～120 a
● distortion factor: < 0.5%
● resolution: 0.002%*rg
● display: 6 digits
● symmetry of three-phase parameter: voltage≤+ 0.2%; current≤+ 0.5%; phase≤+ 0.5°
● protection: short-circuit protection, open-circuit protection, overload protection
frequency, phase and harmonic
● range of frequency: 45.000 hz～65.000 hz
resolution: 0.001 hz
accuracy: ± 0.01 hz
● range of phase: 0.000°～359.999°
resolution: 0.005°
accuracy: ± 0.01°
● harmonic output(option): 2nd to 21st，amplitude 0～40%、phase 0.0°～359.9° adjustable
stability of output power
accuracy of power/electrical energy
measurement characteristics：
● ac power range: combination of ac voltage range and current range
● output of standard electrical energy pulse (high frequency): full scale value corresponds to 60 khz.
output of standard electrical energy pulse(low frequency): full scale value corresponds to 6 hz.
frequency jitter of output pulse: < 10 μs
● input of standard electrical energy pulse: high frequency pulse less than or equal to 150khz with the amplitude of 3.3v~24v can be received.
● the electrical energy error is automatically displayed with the resolution of 0.0001%.
general specifications
● line power: ac ( 220 ± 22 ) v，( 50 ± 2 ) hz
● operating environment: 0 ℃～40 ℃, 20%～80% r·h, non-condensing
● storage environment: -20 ℃～70 ℃，< 80% r·h，不结露
● dimensions（width*depth*height）: 490 mm × 485 mm × 200 mm
● weight: 29 kg
● standard interface: rs232
selection guidance
