Embedded temperature monitoring of motors and generators is a long time industry accepted practice, allowing for continuous assessment of equipment condition. The embedded method of monitoring utilizes specially designed Resistance Temperature Detectors (RTDs) and Thermocouples (T/Cs) placed outside the major insulation as specified in ANSI C50-10-1990, Section 5.2.
BLUE PETER Series® temperature sensors are designed specifically to accurately sense and respond to temperatures of the windings in motors and generators. This allows constant monitoring to insure equipment operation within design limits.
The sensing element of BLUE PETER Series® RTDs extends through most of the body length. The sensor design allows for averaging the measurement process over a greater portion of the slot length. This eliminates the problems related to tip sensitive sensors that can be misleading when 'hot spots' are present. Since stator RTD sensors sometimes exceed 20 inches in body length, this is a useful characteristic.