bw-B1093 US-zabezpieczenie do silników TF.pdf
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Motor Thermistors
“TF” Option
Installation and Maintenance Instructions
BIM-1093a/2003
USA
CDN
Retain These Safety Instructions For Future Use
NORD Gear's thermistor option is three PTC (Positive Temperature Coefficient) temperature
sensitive resistors. They are wired in series, with one on each phase of the stator winding.
The leads will be labeled P1 and P2 in the terminal box.
Thermistor ratings:
•
Maximum operating voltage 2.5 volts
•
Resistance at 25
°
C less than or equal to 300 Ohms
•
Switch temp 155
°
C
•
Response time < 5 seconds
Connection Diagram:
All wiring must be done by qualified personnel and adhere to all local codes.
WARNING:
Thermistors will automatically reset.
This unit must be connected to a Motor Control Protection module such as a Kriwan INT69 or
a Variable Frequency Drive with PTC inputs.
BIM-1093a/2003/01
1
www.nord.com
Motor Thermostats
“TW” Option
Installation and Maintenance Instructions
BIM-1093b/2003
USA
CDN
Retain These Safety Instructions For Future Use
NORD Gear's thermostat option is three temperature sensitive, bimetallic switches with
normally closed contacts. The three switches are wired in series, with one switch on each
phase of the stator winding. The leads will be labeled P1 and P2 in the terminal box.
Thermostat ratings:
Table 1. Available Thermostat Options
Motor Insulation
•
Switch contacts 1.6A at 250 VAC
•
Permissible working 6 to 500 VAC
•
Automatically resetting with 30±15
°
C
drop below switching temperature
•
Resistance less than 50 mΩ
•
Switch rebound less than 1 millisecond
•
10g shock in all directions
•
2,000 VAC Insulation rating
•
10,000 cycles
•
Normally closed
Class F
Class H
Warning before
motor reaches
maximum
temperature rating
265
°
F
(130)
°
C
310
°
F
(155)
°
C
Shut Down when
motor reaches
maximum rated
temperature*
310
°
F
(155)
°
C
355
°
F
(180
°
C)
*Unless otherwise specified motors with
Thermostats will be supplied with shut
down temperature switches
Typical Wiring Schematic
All wiring must be done by qualified personnel and adhere to all local codes
WARNING:
Thermostats will automatically reset.
BIM-1093b/2003/01
1
www.nord.com
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