Siemens MCC-3298 user manual Motor protection graph

Page 23

3 Operating the SAMMS-LV Device

100000

10000

1000

Seconds

100

10

1

.1

.1

Motor running current at full load current


Loss of load
Loss of load
adjustable from
		Jam protection

20 to 90% of
		adjustable from

rated FLC
rated FLC		120 to 400% of FLC
		120 to 400% of FLC


					Maximum
Class 5 curve					stall time
					25 seconds

Jam and loss of load protection persistence delay (5 times overload class)

Motor starting current

600% rated full load current

1

6

10

Iratio

IFLC

Figure 3.10 Motor protection graph

21

Image 23

Contents SAMMS-LV Qualified Person Contents Qualified Person Signal WordsField Service Operation About this Manual Advanced Protection for Low-Voltage Motors SAMMS-LV Device ModelsProgramming Control Circuits Using the Standardized Control PanelOverload Protection Light bars Change settings requires password Yes Remote inputsSAMMS-LV Model Outputs OneInstalling the SAMMS-LV Device Full voltage non-reversing connection diagram Grounding the Device SAMMS-LV device communications connections Performing an Overload Relay Test Password ProtectionUsing the Reset/Test Push Button Performing a Lamp TestInput Devices Output DevicesCustom Ladder Diagrams Ladder Diagrams Library of Standard Ladder DiagramsSAMMS-LVX Standard control circuits RVA Intelligent Reduced-Voltage Starting SAMMS-LVX Only Ridethrough Upon Loss of Power SAMMS-LVX OnlyMotor Ambient Temperature Incomplete SequenceODP motor thermal signature Operating the SAMMS-LV Operating the SAMMS-LV Device 10 Motor protection graph Jam Protection SAMMS-LVX Only Ultimate Trip Level and Service FactorPhase Unbalance Dual Overload Protection SAMMS-LVX OnlyStart Inhibit Ground Fault DetectionStator Protection Repetitive StartsEmergency Restarting Autoreset After a Trip SAMMS-LVX OnlyUsing the Hand Held Communicator HHC Size Pickup Current Default Pickup RangeJam pickup current F24 Loss of load protection or warning Function Number5A CT primary current if used Full load current for OLR No UP and Down Keys Using the Enter KeyFunction Key List KeyCapability External trips Enable/disable phase unbalanceIflc is the value of Iflc for Select ground fault pick-up current Value 2A-5AStep Size Second Default Value Means warning200% 50% 4800 Using the SAMMS-LV Device Func TionsProgram Mode/Passwords Select jam pickup current 120-400% I FLC F24 Loss of Load13 Entering and changing passwords F2 Size for Overload Relay #1 F0 Ambient TemperatureSAMMS-LV Functions F1 Control Circuit Number and Incomplete Se- quence Status90A Overload Setting Step Default Relay Size Range 24.0A 36AF4 Full-Load Current for Overload Relay #1 45AF7 Overload Trip Class F6 Service FactorF8 Autoreset SAMMS-LVX Only F9 Phase Unbalance ProtectionF11 Emergency Restarting F12 Ground Fault Protection or WarningF10 Display Time to Restart F15 Display Current F12A Ground Fault Pickup CurrentF13 Set Programmable Timer #1 F14 Set Programmable Timer #2F19 Number of Motor Starts F21 Reset Motor DataF17 Current Unbalance F18 Display Total Elapsed Run Time of the MotorF24A Loss of Load Pickup Current SAMMS-LVX Only F25 Percentage of Motor Winding TemperatureF23A Jam Pickup Current SAMMS-LVX Only F24 Loss of Load Protection or Warning SAMMS-LVX OnlyF27 Address Troubleshooting Error Condition Troubleshooting Guide Error Condition Appendix a Technical Specifications Overload Specifications Statistical Data Dimensions Catalog Number SAM4 Switch # Function Position Samms Sensor, sizes 1C, 2A, 2B Page Siemens Energy Automation, Inc