Motor and Machine Protection B59155 M 155 Applications ● Thermal protection of winding in electric motors Features ● ● ● ● ● Thermistor pellet with insulating encapsulation Silver-plated and Teflon(PTFE)-insulated AWG 26 litz wires Trip temperature coded in litz wire color Characteristics for nominal threshold temperatures of 90 bis 160 °C conform with DIN 44 081 Can be used in conjunction with Siemens tripping units Max. operating voltage (TA = 0 … 40 °C) Vmax Max. measuring voltage (TA – 25 K … TNAT + 15 K) VMes,max Rated resistance (VPTC ≤ 2,5 V) RN Insulation test voltage Vis Response time ta Operating temperature range (V = 0) Top (V = Vmax) Top Type TNAT ± ∆T M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 °C 60 ± 5 70 ± 5 80 ± 5 90 ± 5 100 ± 5 110 ± 5 120 ± 5 130 ± 5 140 ± 5 145 ± 5 150 ± 5 155 ± 5 160 ± 5 170 ± 6 180 ± 6 118 R (TNAT – ∆T) (VPTC ≤ 2,5 V) Ω ≤ 570 ≤ 570 ≤ 570 ≤ 550 ≤ 550 ≤ 550 ≤ 550 ≤ 550 ≤ 550 ≤ 550 ≤ 550 ≤ 550 ≤ 550 ≤ 550 ≤ 550 R (TNAT + ∆T) (VPTC ≤ 2,5 V) Ω ≥ 570 ≥ 570 ≥ 570 ≥ 1330 ≥ 1330 ≥ 1330 ≥ 1330 ≥ 1330 ≥ 1330 ≥ 1330 ≥ 1330 ≥ 1330 ≥ 1330 ≥ 1330 ≥ 1330 30 7,5 ≤ 100 2,5 <5 – 25/+ 180 0/40 R (TNAT + 15 K) (VPTC ≤ 7,5 V) Ω — — — ≥4k ≥4k ≥4k ≥4k ≥4k ≥4k ≥4k ≥4k ≥4k ≥4k ≥4k ≥4k V V Ω kV ac s °C °C R (TNAT + 23 K) (VPTC ≤ 2,5 V) Ω ≥ 10 k ≥ 10 k ≥ 10 k — — — — — — — — — — — — Siemens Matsushita Components B59155 M 155 Dimensions in mm Type Color coding of litz wires Ordering code M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 M 155 white/grey white/brown white/white green/green red/red brown/brown grey/grey blue/blue white/blue white/black black/black blue/black blue/red white/green white/red B59155-M60-A70 B59155-M70-A70 B59155-M80-A70 B59155-M90-A70 B59155-M100-A70 B59155-M110-A70 B59155-M120-A70 B59155-M130-A70 B59155-M140-A70 B59155-M145-A70 B59155-M150-A70 B59155-M155-A70 B59155-M160-A70 B59155-M170-A70 B59155-M180-A70 Siemens Matsushita Components 119 B59155 M 155 Characteristics (typical) PTC resistance RPTC versus PTC temperature TPTC (measured at low signal voltage) PTC resistance RPTC versus PTC temperature TPTC (measured at low signal voltage) 120 Siemens Matsushita Components B59155 M 155 Characteristics (typical) PTC resistance RPTC versus PTC temperature TPTC (measured at low signal voltage) Siemens Matsushita Components 121