Single Element Stator Winding RTDs

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. Manstronics stator RTDs meet the specifications of ANSI C50.10-1990, general requirements for synchronous motors.

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.
Thickness (mm) : 1, 1.5, 2, 2.5 & above as per customer requirement
Length (mm) : 20, 45, 100, 150, 200, 250 & above as per customer requirement
Standard body width (inches) :

0.219	0.260	0.305	0.315
0.344	0.406	0.455	0.500
0.563	0.656	0.750	0.875
1.000

Custom order any width from 0.219" to 2.500"
Leadwires : 2, 3 or 4, stranded copper with PTFE or polyimide insulation.
Other leadwire coverings available:
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).

Dielectric strength : Upto 5 KV tested between the leads and external flat body surface for 1 to 5 seconds.