Siemens CGZ - Manual (Page 10)

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Installation
Typical Motor Control Settings
Alarm
Trip
(Shutdown)
Timer Trip
Setting (1)
Winding Temperature
• Class B Insulation
• Class F Insulation
130°C
155°C 155°C
170°C
Motor Bearing Temperature
(Thermocouple or RTD’s)
• Sleeve Bearing
90°C 95°C
• Antifriction Bearing
100°C 105°C
Ground Fault
4 Amps (2)
Primary
Circuit
8 Amps (2)
Primary
Circuit
0.2 sec. (2)
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
also applies to starting unless otherwise
specified) 90 % of Rated Voltage 10 sec.
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.