This standard specifies the technical requirements, calibration methods, calibration data processing and calibration cycle for on-site calibration of oil-immersed transformers (reactors, converter transformers) with voltage levels of 110kV and above (referred to as temperature measurement devices), etc. The voltage level temperature measuring device can be implemented as a reference. This standard applies to on-site calibration of temperature measuring devices that have been calibrated in the laboratory and installed for on-site use. This standard does not apply to on-site calibration of temperature measurement devices using optical fiber sensors.
DL/T 1400-2015 Referenced Document
DL/T 572-2010 Operation specification for power transformer
JB/T 6302-2005 Oil-surface thermometers for transformers