Baldor Global TEAO Series, Инструкция по установке и эксплуатации, Страница: 29 / 37

4-4 Optional Accessories MN409
Bearing Thermocouple
− TIC
Purpose
To measure or monitor bearing temperature during operation.
Principle of Operation
The TIC uses a junction of two dissimilar metals to generate a voltage, which varies linearly with change
in junction temperature.
Customer Interconnect
Using the same type of TIC wire, connect to terminal strip posts in separate conduit box.
Leads are tagged.
Remarks
1. Can provide continuous temperature measuring or temperature monitoring.
2. Can also measure temperature by using a potentiometer and converting voltage to temperature by
use of the proper conversion tables.
3. Needs separately mounted control and power source to read temperature or to provide a means of
relay operation for either alarm of motor shut down features.
Bearing Thermostat
(Also called Bearing Temperature Relay or Gas Bulb Switch)
Purpose
To indicate the bearing temperature has exceeded normal operating temperatures.
Principle of Operation
The device operates due to expansion of gas sealed within a sealed gas bulb element which is placed in
contact with the bearing housing. As the temperature of the bearing or oil increases, the gas in the
element expands and deflects a diaphragm in the switch. The movement of the diaphragm activates the
switch contacts. The contacts can be wired directly to a relay to provide either alarm indication or motor
shutdown.
Construction
The thermostat consists of a set of normally closed or normally open contacts operated by a diaphragm
which is connected to a gas bulb through a capillary tube.
Bearing Thermometer
Purpose
To measure directly the temperature of the oil in the bearing sump or of the bearing outer race.
This Manual:http://www.manuallib.com/baldor/mn409-large-ac-motors-handbook.html