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td4800 calibrator for electronic instrument transformers






model td4800, an apparatus for calibrating electronic instrument transformers. this apparatus is composed of ac voltage and ac current standard source as well as a small signal measurement from 0 to 6.25 v.

applied to calibrate the electronic instrument transformers with analog output or data transmission which of meeting iec 61850, and measure ratio difference and angle difference to make a comprehensive evaluation for the electronic instrument transformers.

reference standard

● iec 61869-11:2017 instrument transformers. part 11: additional requirements for low power passive voltage transformers

● gb/t 20840.7-2007 instrument transformers. part 7: electronic voltage transformers

● gb/t 20840.8-2007 instrument transformers. part 8: electronic current transformers

● jjg 313-2010 instrument current transformers

● jjg 314-2010 instrument voltage transformers

● jjg 1021-2007 instrument transformers in power system

● dl/t 668-1999 instrument transformer testing equipment for measuring service


● there are built-in ac voltage and ac current standard sources with high precision, no need for external voltage regulators and current risers.

● display the waveform, frequency, amplitude and phase of the measured parameters in real time.

● count and analyze the average, maximum variation, extreme and square deviation of ratio difference and angle difference.

● multiple harmonic analysis and accuracy calibration of each order harmonic for the electronic instrument transformers.

● dual sc fiber ethernet interface and rj45 ethernet interface.

electrical specifications

ac voltage and current output


output characteristics

● output range of voltage: 6 v to 120 v, the load power is more than 12 va.

● output range of current: 0.1 a to 6 a, the load power is more than 20 va.

● resolution: 0.001 % of range

frequency, phase and harmonic


ac measurement

● range: 100 mv, 200 mv, 500 mv, 1 v, 2 v, 5 v.

 measuring range: 0.1 v to 6.25 v

● accuracy of ratio difference: ± (0.03 % of read + 0.02 % of range)

● accuracy of angle difference: ±2 ′

clock synchronization

● supported mode: code irig-b of fiber or rj45 ethernet interface, pps io mode of fiber or electrical level and clock output mode of abnormal timing.

● error measurement: synchronization or out of synchronization

● clock accuracy in 1 year: ±1 ppm

general specifications

● line power: 220 v ±22 v, 50 hz ±2 hz

● operating environment: 0 °c to +40 °c, 20 % to 85 % r·h, non-condensing

● storage environment: -20 °c to +70 °c, <85 % r·h, non-condensing

● communication: rs-232 interface

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