Overload Specifications | Siemens MCC-3298 manual

Appendix A Technical Specifications

Overload Specifications

Overload classes	Overload classes 2 through 23 with one second increments.
Trip Characteristics	Tripping time at 6 x I FLC		= 95% of the overload class (±5%).
	Tripping time at 1.5 x I FLC within two minutes for warm conditions for all classes.
Tripping threshold	(1.1 ± 0.05) x I FLC for motors with 1.00 service factor, and
	(1.2 ± 0.05) x I FLC for motors with 1.15 service factor.
Tripping time	20 minutes @1.15 x I FLC		for motors with service factor 1.
Mechanical jam protection	Sudden increase of the motor running current. Pick-up current adjustable from 120 to
SAMMS-LVX only	400% in increments of 5% of I FLC . Pick-up time 360 msec.
	Default value: 200% I FLC.
Loss of load protection	Sudden decrease of motor running current. Pick-up current adjustable from 20 to 95% in
SAMMS-LVX only	increments of 5% of I FLC . Pick-up time 360 msec.
	Default value: 50% I FLC .
Process current warning	Settings from 0 to 100% of I FLC .
SAMMS-LVX only
Accuracy	± 5% of overload trip curve values.
	± 2% repeat accuracy.
Phase unbalance protection	Response time after 1 second
	Shifted trip threshold value to 0.9 x I FLC			at 40% phase unbalance.
Equipment ground fault protection	Response time after overload class in seconds.
	Pick-up time: 360 msec.
	Pick-up current:
	Overload Relay Size Pick-up Current			Default
	1A		1.5A	1.5A
	1B		2A- 5A	5A
	1C		2A- I FLC	5A
	2A		2A- I FLC	10A
	2B		2A- I FLC	10A
	3		2A- I FLC	10A
	4		2A- I FLC	10A
	5		5A- I FLC	10A
	6		10A- I FLC	20A
	I FLC	is the value of I FLC for OLR#2 if F# is not set to OFF. If F3 is OFF, I FLC is the value of
	I FLC	for OLR#1.
Ambient temperature	Motor ambient temperature adjustable 0 - 70°C in increments of 5°C.
	Default value: 40°C.

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Siemens MCC-3298 user manual Overload Specifications

Contents

SAMMS-LV Qualified Person Contents Signal Words Field Service OperationQualified Person About this Manual Advanced Protection for Low-Voltage Motors SAMMS-LV Device Models Using the Standardized Control Panel Overload ProtectionProgramming Control Circuits SAMMS-LV Model Change settings requires password Yes Remote inputsOutputs One Light bars Installing the SAMMS-LV Device Full voltage non-reversing connection diagram Grounding the Device SAMMS-LV device communications connections Using the Reset/Test Push Button Password ProtectionPerforming a Lamp Test Performing an Overload Relay Test Input Devices Output Devices Custom Ladder Diagrams Ladder Diagrams Library of Standard Ladder Diagrams SAMMS-LVX Standard control circuits RVA Motor Ambient Temperature Ridethrough Upon Loss of Power SAMMS-LVX OnlyIncomplete Sequence Intelligent Reduced-Voltage Starting SAMMS-LVX Only ODP motor thermal signature Operating the SAMMS-LV Operating the SAMMS-LV Device 10 Motor protection graph Phase Unbalance Ultimate Trip Level and Service FactorDual Overload Protection SAMMS-LVX Only Jam Protection SAMMS-LVX Only Stator Protection Ground Fault DetectionRepetitive Starts Start Inhibit Using the Hand Held Communicator HHC Autoreset After a Trip SAMMS-LVX OnlySize Pickup Current Default Pickup Range Emergency Restarting Function Number 5A CT primary current if used Full load current for OLR NoJam pickup current F24 Loss of load protection or warning Function Key Using the Enter KeyList Key UP and Down Keys Capability External trips Enable/disable phase unbalance Step Size Second Default Value Select ground fault pick-up current Value 2A-5AMeans warning Iflc is the value of Iflc for Program Mode/Passwords Using the SAMMS-LV Device Func TionsSelect jam pickup current 120-400% I FLC F24 Loss of Load 200% 50% 4800 13 Entering and changing passwords SAMMS-LV Functions F0 Ambient TemperatureF1 Control Circuit Number and Incomplete Se- quence Status F2 Size for Overload Relay #1 F4 Full-Load Current for Overload Relay #1 Overload Setting Step Default Relay Size Range 24.0A 36A45A 90A F8 Autoreset SAMMS-LVX Only F6 Service FactorF9 Phase Unbalance Protection F7 Overload Trip Class F12 Ground Fault Protection or Warning F10 Display Time to RestartF11 Emergency Restarting F13 Set Programmable Timer #1 F12A Ground Fault Pickup CurrentF14 Set Programmable Timer #2 F15 Display Current F17 Current Unbalance F21 Reset Motor DataF18 Display Total Elapsed Run Time of the Motor F19 Number of Motor Starts F23A Jam Pickup Current SAMMS-LVX Only F25 Percentage of Motor Winding TemperatureF24 Loss of Load Protection or Warning SAMMS-LVX Only F24A Loss of Load Pickup Current SAMMS-LVX Only F27 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