Thermistor-/PTC resistor relay TKR-2

€77.86
Tax included

The TKR-2 thermistor/PTC resistor relay serves to

monitor the winding temperature of motors. Thermal

overload may occur owing to mechanical overloading

on the shaft, or when operating with undervoltage.

The coil temperature is recorded via the change in

resistance of the PTC sensors installed in the coils

(PTC resistors) or the position of thermal contacts

relays. The PTC sensor circuit is monitored for wire

breakage and short circuit.

Input side

Supply terminals A1 - A2 (L/+) - (N/-)

Supply voltage 24 - 240 V AC/DC

Tolerance -15 %; +10 %

Power consumption 2 VA

Measure circuit

Measuring terminals T1 - T2 (the connection for the measuring range must be effected via a separate cable)

Measuring voltage ca. 2.5 V DC

Upper resistance value 3.3 kΩ

Lower resistance value 1.8 kΩ

Sensor PTC resistor / thermal contact (can be switched to switch at the front)

Sensor malfunction signal LED red

Accuracy

Repeatability < 0.5 %

Switching difference +/- 5 %

Temperature dependency < 0.1 % / °C

General data

Mechanical life 3 x 107

Electric life 0.7 x 105

Dielectric strength between coil and contacts 2.5 kV

Ambient temperature -20°C … +55°C

Storage temperature -30°C … +70°C

Mounting position any

Fixing DIN rail EN 50022-35

Protection class of Front IP 40

Voltage limitation class III

Degree of contamination 2

Connection cross-section 2.5 mm2

Weight 77 g

Standards EN 60730-2-9, EN 61010-1

Output side

Number of contacts 2 changeover contacts

Switching voltage 250 V AC / 24 V DC

Switching current / contact material 8 A / AC1 / AgNi

Output display LED red

min. DC switching capacity 500 mW

Maximum peak current 10A / < 3s

Switching capacity 2000 VA / AC1 / 192 W / DC

DUW-41/N

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