Siemens user manual SAMMS-MV Device Models, Advanced Protection for Medium-Voltage Motors

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1 Introduction

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Figure 1.1 SAMMS-MV, front view

1.2.1 The SAMMS-MV Device Models

The SAMMS-MV device is available in two models: SAMMS-MVE and SAMMS-MVX. Each model meets the various demands of industrial and commercial specifications and installations. Table 1.2 compares the features of each model.

The SAMMS-MV device is designed for critical process control where prevention of downtime is critical. It offers motor control and protection along with motor diagnostic and motor/driven equipment protection. Engineering and operating personnel have access to important data enabling them to optimize motor-driven equipment capabilities, maximize the process system output and facilitate maintenance.

SAMMS-MVX is a full function model, applicable to all control needs, from a simple across-the-line unit to a more compli- cated reduced voltage scheme. It includes all of the functions listed in table 3.7. Any of the standard control circuits listed in table 3.3, or a custom circuit, may be downloaded. The SAMMS-MVX device accepts up to four remote inputs, while SAMMS-MVE accepts two remote inputs.

SAMMS-MVE is a model of SAMMS-MV tailored to across-the- line (FVNR) applications. It provides all of the protective func- tions of the SAMMS-MVX device, except that it has no jam

protection (F23), loss of load protection/alarm (F24), or process current warning (F22) functions. Functions F3 and F5 associ- ated with two-speed applications are not available. No provi- sion for automatic reset (F8) is provided. SAMMS-MVE accepts one remote input, and provides one output to actuate a single contactor. An alarm contact is not available with SAMMS-MVE.

These remote inputs are compatible with all PLCs and electro- mechanical remote control devices that have a 120VAC or 125VDC input signal.

1.2.2 Advanced Protection for Medium-Voltage Motors

For advanced protection of medium voltage motors, the SAMMS-MV device uses a motor model algorithm that continu- ally calculates the stator winding and housing temperature as well as the rotor temperature as a function of the motor rms current. The motor model compares the calculated tempera- ture to trip temperature values and provides a signal that trips the motor off line when the motor reaches a trip temperature value. The model closely emulates the heating and cooling of the motor windings as well as the rotor and provides protection against both transient and steady-state overload conditions.

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Contents SAMMS-MV Qualified Person Contents Signal Words Field Service OperationQualified Person About this Manual SAMMS-MV Device Models Advanced Protection for Medium-Voltage MotorsUsing the Standardized Control Panel Overload ProtectionProgramming Control Circuits Outputs One Change settings requires password Yes Remote inputs OneSAMMS-MV Model Light barsInstalling the SAMMS-MV Device Full voltage non-reversing connection diagram Grounding the Device SAMMS-MV device communications connections Performing a Lamp Test Password ProtectionUsing the Reset/Test Push Button Performing an Overload Relay TestOutput Devices Input DevicesLadder Diagrams Library of Standard Ladder Diagrams Custom Ladder DiagramsSAMMS-MVX Standard control circuits PB1 PB2 PB3 PB4 PB5 PB6 Incomplete Sequence Ridethrough Upon Loss of Power SAMMS-MVX OnlyMotor Ambient Temperature Intelligent Reduced-Voltage Starting SAMMS-MVX OnlyODP motor thermal signature Protection Curves and Overload Classes Seconds Operating the SAMMS-MV 11 Motor protection graph Dual Overload Protection SAMMS-MVX Only Ultimate Trip Level and Service FactorPhase Unbalance Jam Protection SAMMS-MVX OnlyStart Inhibit Ground Fault DetectionRepetitive Starts Cooling Time Constants12 Multi-start scenario for an ODP motor Emergency Restarting Autoreset After a Trip SAMMS-MVX OnlyUsing the Hand Held Communicator HHC Function Key5A CT primary current if used Full load current for OLR No 5A CT primary current low speed if used Service factorFunction Number Motor type Overload trip class class 2 throughUsing the Enter Key Using the SAMMS-MV Device Func- tionsUP and Down Keys ON/OFF Means warning Select ground fault pick-up currentDefault Value Select jam pickup current 120-400% Iflc F24 Loss of Load13 Entering and changing passwords SAMMS-MV Functions Program Mode/PasswordsF0 Ambient Temperature F1 Control Circuit Number and Incomplete Se- quence StatusF4 Full-Load Current for Overload Relay #1 Overload Setting Step Default Relay Size RangeF3 Size for Overload Relay #2 SAMMS-MVX Only 18 to 72AF7 Overload Trip Class F6 Service FactorF6A Motor Type F7A Cold Stall TimeF10 Display Time to Restart F8 Autoreset SAMMS-MVX OnlyF9 Phase Unbalance Protection F11 Emergency RestartingSize Pickup Current Default H3A-H3C 7A-I FLC 10A 20A F12 Ground Fault Protection or WarningF12A Ground Fault Pickup Current F13 Set Programmable Timer #1F17 Current Unbalance F21 Reset Motor DataF16 Trip Current F18 Display Total Elapsed Run Time of the MotorF23 Jam Protection SAMMS-MVX Only F25 Percentage of Motor Winding TemperatureF22 Process Current Warning Level SAMMS-MVX Only F23A Jam Pickup Current SAMMS-MVX OnlyF26 Baud Rate F27 AddressTroubleshooting Error Condition Troubleshooting Guide Error Condition Appendix a Technical Specifications Over load Spec ificat ions Stat ist ica l Data Dimensions Catalog Number SAM6 Switch # Function Position 375 Siemens Energy Automation, Inc
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