Coil End Temperature Detector and Bearing Temperature Sensor_R840 series_R841, R842, R843, R844, R845, R846, R847, R848
Type: R840s
 
Service intended
 
Coil End Temperature Detector has its element covered in heat-resistance contraction tube and liquid silicone inside, which is engineered for fast response time and strong resistance to vibration. It is usually installed on motors or end part of generator stator. 
 
Bearing temperature sensor feature a sensing tip constructed of stainless steel. The bearing temperature sensor design also focuses the temperature sensitive portion of the sensor near the tip of the probe, providing improved accuracy in thermowells, bearings and other installations.
 
Standard features
 
Element
 
RTD : Pt 100 Ω at 0 °C(DIN) Film type
 
Body material
 
Coil End Temperature Detector : Teflon Bearing
Temperature Sensor : 304SS, 316SS, 316L SS
 
Body outer diameter and length
 
Coil End Temperature Detector : Min. 4 x Min. 25 mm
Bearing Temperature Sensor : Min. 3.2 x Min. 6.35 mm
 
Molding
 
Coil End Temperature Detector : Silicone filled
Bearing Temperature Sensor : Epoxy filled, Silicon filled
 
Standard
 
Explosive atmospheres.
Equipment - General requirements
IEC 60079-0 / EN 60079-0
Electrical apparatus for explosive gas atmospheres.
Increased safety " e "
IEC 60079-7 / EN 60079-7
Intrinsic safety " i "
IEC 60079-11 / EN 60079-11
 
Certificates
 
ATEX II 2G Ex e IIC Gb
IECEx Ex e IIC Gb
ATEX II 1G Ex ia IIC T6...T3 Ga
IECEx Ex ia IIC T6...T3 Ga
 
Tolerances on temperature reading
 
R.T.D.
Class A : ± (0.15 + 0.002 l t l)
Class B : ± (0.3 + 0.005 l t l)
 
Service Temperature (Ex e)
 
-40 °C ≤ Tservice ≤ 180 °C
 
Ambient Temperature
 
■ Temperature class T6 : -40 °C < Tamb < 75 °C
(1) One Pt100
     Ui = 30 V, Ii = 25 mA, Pi = 70 mW
(2) Two Pt100
     Ui = 30 V, Ii = 15 mA (each Pt100),
     Pi = 50 mW (together)
■ Temperature class T5 : -40 °C < Tamb < 95 °C
(1) One Pt100
     Ui = 30 V, Ii = 55 mA, Pi = 630 mW
(2) Two Pt100
     Ui = 30 V, Ii = 45 mA (each Pt100),
     Pi = 760 mW (together)
■ Temperature class T4 : -40 °C < Tamb < 130 °C
(1) One Pt100
     Ui = 30 V, Ii = 55 mA, Pi = 630 mW
(2) Two Pt100
     Ui = 30 V, Ii = 50 mA (each Pt100),
     Pi = 1 W (together)
■ Temperature class T3 : -40 °C < Tamb < 180 °C
(1) One Pt100
     Ui = 30 V, Ii = 40 mA, Pi = 255 mW
(2) Two Pt100
     Ui = 30 V, Ii = 30 mA (each Pt100),
     Pi = 260 mW (together)