Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315
25
5
Motors in category 3GD
Electrical Installation
Accessory equip-
ment
Connect accessory equipment as shown in the wiring connection diagram(s) provided
with the motor.
Do not connect or start up the accessory equipment if the wiring
diagram is missing.
You can obtain the valid wiring diagrams free of charge from
SEW-EURODRIVE.
TF temperature sensor
The PTC thermistors comply with DIN 44082.
Resistance measurement (measuring instrument with V
≤
2.5 V or I < 1 mA):
• Standard measured values: 20...500
Ω
, thermal resistance > 4000
Ω
When using the temperature sensor for thermal monitoring, the evaluation function must
be activated to maintain reliable insulation of the temperature sensor circuit. If the tem-
perature reaches an excessive level, the thermal protection function must be activated
immediately.
STOP
The temperature sensor TF may not be subjected to voltages > 30 V.
