Installation
Typical Motor Control Settings
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| Alarm |
| Trip | Timer Trip |
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| (Shutdown) | Setting (1) | |
Winding Temperature |
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| 130°C |
| 155°C |
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∙ | Class B Insulation |
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∙ | Class F Insulation |
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| 155°C |
| 170°C |
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Motor Bearing Temperature |
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(Thermocouple or RTD’s) |
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| 100°C |
| 105°C |
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∙ | Sleeve Bearing |
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∙ | Antifriction Bearing |
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| 100°C |
| 105°C |
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Ground Fault |
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| 4 Amps (2) |
| 8 Amps (2) | 0.2 sec. (2) | ||
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| Primary |
| Primary |
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| Circuit |
| Circuit |
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Instantaneous Overcurrent |
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∙ With ½ Cycle Delay |
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| 1.8 times Locked Rotor Amps (2) |
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∙ | Without Time Delay |
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| 2.4 times Locked Rotor Amps (2) |
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Maximum Voltage |
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| 110 % of Rated Voltage | 10 sec. | ||||
Minimum Voltage (the minimum voltage | 90 % of Rated Voltage | 10 sec. | ||||||
also applies to starting unless otherwise | ||||||||
specified) |
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Maximum Frequency Deviation |
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| ±5% | 10 sec. | ||||
Maximum of Voltage Plus Frequency Deviation |
| ±10% | 10 sec. | |||||
Maximum Voltage Unbalance (3) |
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| 1% | 15 sec. | ||||
Maximum Current Unbalance (3) |
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| 8% | 15 sec. | ||||
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| Suggested Vibration Limits |
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| RPM |
| 3600 |
| 1800 |
| 1200 | 900 and |
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| Slower |
Shaft (mils, |
| 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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