Installation

Typical Motor Control Settings

 

 

 

 

 

Alarm

 

Trip

Timer Trip

 

 

 

 

 

 

(Shutdown)

Setting (1)

Winding Temperature

 

 

130°C

 

155°C

 

•

Class B Insulation

 

 

 

 

•

Class F Insulation

 

 

155°C

 

170°C

 

Motor Bearing Temperature

 

 

 

 

 

 

(Thermocouple or RTD’s)

 

 

100°C

 

105°C

 

•

Sleeve Bearing

 

 

 

 

•

Antifriction Bearing

 

 

100°C

 

105°C

 

Ground Fault

 

 

4 Amps (2)

 

8 Amps (2)

0.2 sec. (2)

 

 

Primary

 

Primary

 

 

 

 

 

 

Circuit

 

Circuit

 

Instantaneous Overcurrent

 

 

 

 

 

 

• With ½ Cycle Delay

 

 

1.8 times Locked Rotor Amps (2)

 

•

Without Time Delay

 

 

2.4 times Locked Rotor Amps (2)

 

Maximum Voltage

 

 

110 % of Rated Voltage

10 sec.

Minimum Voltage (the minimum voltage

90 % of Rated Voltage

10 sec.

also applies to starting unless otherwise

specified)

 

 

 

 

 

 

Maximum Frequency Deviation

 

 

±5%

10 sec.

Maximum of Voltage Plus Frequency Deviation

 

±10%

10 sec.

Maximum Voltage Unbalance (3)

 

 

1%

15 sec.

Maximum Current Unbalance (3)

 

 

8%

15 sec.

 

 

 

 

 

 

 

 

 

 

 

Suggested Vibration Limits

 

 

 

RPM

 

3600

 

1800

 

1200

900 and

 

 

 

 

 

 

 

 

Slower

Shaft (mils, pk-to-pk)

 

3.3

 

3.7

 

4.3

5.0

Housing (in./sec.)

 

0.25

 

0.25

 

0.25

0.25

(1)Maximum time at maximum condition before control device is to operate.

(2)Increase as necessary to avoid nuisance trips.

(3)This is the maximum deviation from the average of the three phases.

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