Overview Flat, laminated “stick” RTDs fit in slots between stator windings to monitor temperature rise and prevent overheating. The National Electrical Manufacturers Association (NEMA)recognizes embedded detectors as a standard protection for motor and generator insulation. Unlike on-off devices, RTDs provide continuous sensing for earlier warning without unnecessary tripouts. The sensing elements of stator RTDs extend through most of the body length to provide an average temperature reading.This eliminates the danger of a point-type sensor missing a localized hot spot. Six sensors are recommended for each motor, two per phase. Locate sensors near the hottest point of the windings for best performance. Minco stator RTDs meet the specifications of ANSI C50.10-1990, general requirements for synchronous motors. Custom designs Minco designs and builds custom models for many applications.We offer unmatched capabilities because we control all steps of the production from element to finished product. Examples of special options include: - Thermocouple elements
- Thermistor elements (PTC or NTC)
- Dual sensors with different elements (for example, one copper and one platinum element)
- EEx rated sensors for equipment in hazardous areas.
See page 8-2 for more information. - Electrically conductive coating
- Special leadwire or cable
| | Specifications Temperature limit: Class F: 155°C (311°F)
Class H: 180°C (356°F). Body material: Class F: Epoxy glass
Class H: High temperature epoxy glass. Standard sizes (others available): Thickness
inches (mm) | 0.030 (.76) | 0.050 (1.3) | 0.078 (2.0) | 0.125 (3.2) | Length
inches (cm) | 6.0 (15) | 10.0 (25) | 10.0 (25) | 12.0 (30) | Standard
body width
inches (mm) | 0.219 (5.6)
0.344 (8.7)
0.563 (14)
1.000 (25) | 0.260 (6.6)
0.406 (10)
0.656 (17) | 0.305 (7.7)
0.455 (12)
0.750 (19) | 0.315 (8.0)
0.500 (13)
0.875 (22) |
Note: Custom order any width from 0.219" (5.6mm) to 2.500" (64mm) | 0.125" thick: | AWG 18. | | 0.078" thick: | AWG 22. | | 0.050" thick: | AWG 26. | | 0.030" thick: | AWG 30 (no lead bulge); | | | AWG 18 (0.110" lead bulge); | | | Cable (0.110" lead bulge). |
Leadwires: 2, 3, or 4, stranded copper with PTFE or polyimide
insulation. Other leadwire coverings available. Dielectric strength: 3200 VRMS at 60 Hz, tested between the
leads and external flat body surface for 1 to 5 seconds. |
