Siemens Autoreset After a Trip SAMMS-MVX Only, Emergency Restarting, Function Key, List Key

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3 Operating the SAMMS-MV Device

Size

Pickup Current

Default Pickup

 

Range

Current

 

 

 

H3A

7A to I FLC

10A

 

 

 

H3B

7A to I FLC

10A

 

 

 

H3C

7A to I FLC

10A

 

 

 

H6

7A to I FLC

20A

Table 3.6 Ground fault pickup levels

Ground fault detection requires no additional external circuitry or transformers. Ground fault detection for the SAMMS-MV device is not available for grounded, three-phase systems or single-phase applications. Ground fault pickup time is 360 msec.

3.26Autoreset After a Trip (SAMMS-MVX Only)

To restart the motor after a trip or a fault, you must first reset the SAMMS-MVX device. You can reset the SAMMS-MV device in one of two ways. First, press the Reset/Test button on the front panel of the device. Second, enable the autoreset with HHC function F8.

∙enable = ON

∙disable = OFF

With autoreset enabled, overload and external trips automati- cally reset in 30 seconds after the trip. Once the reset occurs, the SAMMS-MV device can be used to restart the motor, unless the motor has reached its maximum temperature and has not cooled down to the full-load level (start inhibit). Resetting after a trip does not interrupt or otherwise affect the ongoing motor thermal computations.

3.27 Emergency Restarting

In certain critical applications, you may want to restart a hot motor even though restarting will damage or destroy the motor. An emergency restart is a motor start that occurs after an overload trip on maximum allowable winding, housing, or rotor temperature; but before all have cooled down to the full-load temperature level (100%) or below. In other words, an emer- gency restart is a start that occurs before the restart time displayed by HHC function F10 reaches zero.

With the emergency restart function enabled (HHC function F11), the motor can be restarted regardless of the residual heat. If the SAMMS-MV device performs an emergency restart, the winding, housing, and rotor temperatures in the motor model computations reset to zero. Any time the motor is started, whether an emergency restart or a normal start, the emergency restart HHC function F11 is automatically reset to disable.

∙enabled = ON

∙disabled = OFF

3.28Using the Hand Held Communicator (HHC)

The HHC provides you with the capability to monitor and alter various motor control and protection functions provided with the SAMMS-MV device. For example, you can monitor and alter control and protection settings such as on-delay time and overload class. You can also monitor a variety of motor operating conditions such as average current and elapsed running time.

The SAMMS-MV device functions accessible through the HHC are shown in Table 3.7 The number of functions available depends upon the model of the SAMMS-MV device you are using.

The HHC’s small size makes it convenient to carry around and use for communication with many SAMMS-MV devices. To use the HHC, connect the HHC’s cable, which uses a DB-9 connector, to the communication port located on the front panel of the SAMMS-MV device. The HHC receives power and control from the SAMMS-MV device. When connected to the SAMMS-MV device, data is displayed on the HHC by a four- character, seven segment liquid crystal display. When discon- nected from the SAMMS-MV device, the HHC does not retain or display data.

Once connected, you can access the functions provided by the SAMMS-MV device through the use of the HHC’s control keys. The HHC has five (5) control keys: (F)unction, LIST, UP, DOWN, and ENTER. The asterisk (*) key serves no function. The HHC control keys are described in the following sections.

3.28.1 The (F)unction Key

When you press the (F)unction key, the function mode is selected and the HHC displays the number of the selected function preceded by F. With the HHC in the function mode, use the UP and DOWN keys to step from one function to the next.

3.28.2 The LIST Key

When you press the LIST key, the display mode is selected and the HHC displays the value corresponding to the selected function. If the selected function is a set point, the HHC displays the actual setting. If the selected function is a measured quantity, the HHC displays the value of the measured quantity.

In the display mode, use the UP and DOWN keys to step through the range of possible set points for the selected

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Contents SAMMS-MV Qualified Person Contents Field Service Operation Signal WordsQualified Person About this Manual SAMMS-MV Device Models Advanced Protection for Medium-Voltage MotorsOverload Protection Using the Standardized Control PanelProgramming Control Circuits Change settings requires password Yes Remote inputs One SAMMS-MV ModelOutputs One Light barsInstalling the SAMMS-MV Device Full voltage non-reversing connection diagram Grounding the Device SAMMS-MV device communications connections Password Protection Using the Reset/Test Push ButtonPerforming a Lamp Test 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 Ridethrough Upon Loss of Power SAMMS-MVX Only Motor Ambient TemperatureIncomplete Sequence Intelligent Reduced-Voltage Starting SAMMS-MVX OnlyODP motor thermal signature Protection Curves and Overload Classes Seconds Operating the SAMMS-MV 11 Motor protection graph Ultimate Trip Level and Service Factor Phase UnbalanceDual Overload Protection SAMMS-MVX Only Jam Protection SAMMS-MVX OnlyGround Fault Detection Repetitive StartsStart Inhibit Cooling Time Constants12 Multi-start scenario for an ODP motor Autoreset After a Trip SAMMS-MVX Only Using the Hand Held Communicator HHCEmergency Restarting Function Key5A CT primary current low speed if used Service factor Function Number5A CT primary current if used Full load current for OLR No Motor type Overload trip class class 2 throughUsing the SAMMS-MV Device Func- tions Using the Enter KeyUP and Down Keys ON/OFF Select ground fault pick-up current Default ValueMeans warning Select jam pickup current 120-400% Iflc F24 Loss of Load13 Entering and changing passwords Program Mode/Passwords F0 Ambient TemperatureSAMMS-MV Functions F1 Control Circuit Number and Incomplete Se- quence StatusOverload Setting Step Default Relay Size Range F3 Size for Overload Relay #2 SAMMS-MVX OnlyF4 Full-Load Current for Overload Relay #1 18 to 72AF6 Service Factor F6A Motor TypeF7 Overload Trip Class F7A Cold Stall TimeF8 Autoreset SAMMS-MVX Only F9 Phase Unbalance ProtectionF10 Display Time to Restart F11 Emergency RestartingF12 Ground Fault Protection or Warning F12A Ground Fault Pickup CurrentSize Pickup Current Default H3A-H3C 7A-I FLC 10A 20A F13 Set Programmable Timer #1F21 Reset Motor Data F16 Trip CurrentF17 Current Unbalance F18 Display Total Elapsed Run Time of the MotorF25 Percentage of Motor Winding Temperature F22 Process Current Warning Level SAMMS-MVX OnlyF23 Jam Protection 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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