Bosch R911274804, Project Planning Manual

Page: 25 / 76

MKE
DOK-MOTOR*-MKE*******-PRJ1-EN-E1,44
•
06.97 Electrical connections
3-3
Thermal cutout connection
The use of an integrated motor temperature evaluation circuit in
INDRAMAT drive controllers is urgently recommended to evaluate motor
temperature in MKE motors used in areas where explosions represent a
risk.
The PTC resistor connection for motor temperature evaluation is illustra-
ted in the terminal diagram of the relevant drive controller.
Attention!
Temperature evaluation of the motors must implement
INDRAMAT drive controllers!
⇒
Connections
[
1
]
and
[
2
]
of the PTC resistor must be
connected with the temperature cutout circuit
[
TM+;
TM-
]
of the drive controller!
The temperature class of INDRAMAT MKE motors is T4 as per
EN 50014/ 3.77 (European standard). This makes a highly reliable sur-
face temperature of the equipment with
≤
135
°
C possible. The PTC
thermistor, made up of three thermistors, built into the MKE motors, gua-
rantees, in conjunction with the evaluation circuits of the drive controller, a
reliable and safe overtemperature cutout.
Power cable
Motors with terminal boxes are preferably equipped with ready-made po-
wer cables.
These power cables are available in various versions:
•
direct connection of motor to drive controller
•
direct connection of motor to terminal strip
•
direct connection of motor to flanged socket
•
motor connected via pluggable isolating point