Siemens SAMMS-MV user manual Grounding the Device

Page 11

2 Installing the SAMMS-MV Device

2.4.2 Grounding the Device

As stated in Guideline 5, ground each motor controller at a single ground point. The grounding path to earth must be permanent and continuous. It must also be able to safely conduct ground fault currents that may occur in the system to ground through minimum impedance. The earth ground does not carry any current under normal conditions.

Connect a ground bus to the chassis of each controller or to the chassis of the mounting equipment containing the earth ground through a grounding conductor.

Refer to Article 250 of the National Electrical Code for informa- tion about the types and sizes of wire conductors and methods for safely grounding electrical equipment and components.

Note: Do not ground the SAMMS auxiliary current sensor (ACT) leads. (See figure 2.1.)

2.4.3Connecting the Device to a Control Power Source

The SAMMS-MV device requires a 12 VAC control power source in order to operate. Connect the control power source to terminals 5 and 6 located on the top of the relay.

2.4.4Connecting Input and Output Devices to the SAMMS-MV Device

Connect your devices to the input and output connections on the SAMMS-MV device as illustrated in Figure 2.2.

2.4.5 Communications Connection

The SAMMS-MV device is equipped with an RS-485 commu- nications port on the back of the device. The communications port allows connection to a communications module which

ALARM RELAY OUTPUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AC INPUT 4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

115VAC (CPT INPUT)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AC INPUT 3

12VAC (CPT INPUT)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AC INPUT 2

12VAC (CPT INPUT)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AC INPUT 1

ACT RETURN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RETURN

 

 

 

 

 

 

 

 

 

 

 

ACT INPUT 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTPUT 3

ACT INPUT 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTPUT 2

ACT INPUT 3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTPUT 1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

SAMMS-MVX

 

 

 

 

 

Current

 

 

 

 

 

LED

 

LED on

LED Flashing

 

 

 

Unbalance

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Current

 

> 40%

 

20 - 40%

 

 

 

 

 

 

 

 

 

 

Unbalance

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Impending

> 110%

 

> 100%

 

 

 

Impending

 

 

 

 

 

Trip

 

 

< 110%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Trip

 

 

 

 

 

 

Overload

 

Overload

Start

 

 

 

 

 

 

 

 

 

 

 

Trip

 

Inhibit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Incomplete

Trip

 

 

 

 

 

 

Overload

 

 

 

 

 

Sequence

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Trip

 

 

 

 

 

 

 

 

Trip: Loss

Alarm: Loss

 

 

 

 

 

 

 

 

 

External

 

 

 

 

 

 

 

 

 

 

 

 

of Load, or

of Load or

 

 

 

 

 

 

 

 

 

 

Trip Alarm

 

 

 

 

 

 

 

 

 

 

 

 

Jam, or

 

Prcs Current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RTD Input

 

 

 

CPU

 

Incomplete

 

 

 

 

 

 

 

Trip: CPU

 

 

 

 

 

 

 

 

 

CPU

 

 

 

 

Fault

 

Sequence

 

 

 

 

 

 

Failure or

 

 

 

 

 

 

 

 

 

Fault

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low Voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ground

 

Trip

 

Alarm

 

 

 

 

 

 

 

 

 

 

 

Fault

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ground

 

External

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fault

 

Trip/Alarm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset/Test

 

 

 

 

 

 

 

 

 

 

 

 

Ready

 

 

 

 

 

 

 

 

Figure 2.2 Terminal block assignments

9

Page 10 Page 12
Image 11
Page 10 Page 12
Contents SAMMS-MV Qualified Person Contents Qualified Person Signal WordsField Service Operation About this Manual Advanced Protection for Medium-Voltage Motors SAMMS-MV Device ModelsProgramming Control Circuits Using the Standardized Control PanelOverload Protection Light bars Change settings requires password Yes Remote inputs OneSAMMS-MV Model Outputs OneInstalling the SAMMS-MV Device Full voltage non-reversing connection diagram Grounding the Device SAMMS-MV 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-MVX Standard control circuits PB1 PB2 PB3 PB4 PB5 PB6 Intelligent Reduced-Voltage Starting SAMMS-MVX Only Ridethrough Upon Loss of Power SAMMS-MVX OnlyMotor Ambient Temperature Incomplete SequenceODP motor thermal signature Protection Curves and Overload Classes Seconds Operating the SAMMS-MV 11 Motor protection graph Jam Protection SAMMS-MVX Only Ultimate Trip Level and Service FactorPhase Unbalance Dual Overload Protection SAMMS-MVX OnlyCooling Time Constants Ground Fault DetectionRepetitive Starts Start Inhibit12 Multi-start scenario for an ODP motor Function Key Autoreset After a Trip SAMMS-MVX OnlyUsing the Hand Held Communicator HHC Emergency RestartingMotor type Overload trip class class 2 through 5A CT primary current low speed if used Service factorFunction Number 5A CT primary current if used Full load current for OLR NoUP and Down Keys Using the Enter KeyUsing the SAMMS-MV Device Func- tions ON/OFF Select jam pickup current 120-400% Iflc F24 Loss of Load Select ground fault pick-up currentDefault Value Means warning13 Entering and changing passwords F1 Control Circuit Number and Incomplete Se- quence Status Program Mode/PasswordsF0 Ambient Temperature SAMMS-MV Functions18 to 72A Overload Setting Step Default Relay Size RangeF3 Size for Overload Relay #2 SAMMS-MVX Only F4 Full-Load Current for Overload Relay #1F7A Cold Stall Time F6 Service FactorF6A Motor Type F7 Overload Trip ClassF11 Emergency Restarting F8 Autoreset SAMMS-MVX OnlyF9 Phase Unbalance Protection F10 Display Time to RestartF13 Set Programmable Timer #1 F12 Ground Fault Protection or WarningF12A Ground Fault Pickup Current Size Pickup Current Default H3A-H3C 7A-I FLC 10A 20AF18 Display Total Elapsed Run Time of the Motor F21 Reset Motor DataF16 Trip Current F17 Current UnbalanceF23A Jam Pickup Current SAMMS-MVX Only F25 Percentage of Motor Winding TemperatureF22 Process Current Warning Level SAMMS-MVX Only F23 Jam Protection SAMMS-MVX OnlyF27 Address F26 Baud RateTroubleshooting 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
Top Page Image Contents