Siemens MCC-3298 user manual Grounding the Device

Page 11

2 Installing the SAMMS-LV 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-LV 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-LV Device

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

2.4.5 Communications Connection

The SAMMS-LV 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-LVX

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

External

 

Trip: Loss

Alarm: Loss

 

 

 

 

 

 

 

 

 

 

Trip Alarm

 

of Load, or

of Load or

 

 

 

 

 

 

 

 

 

 

 

 

Jam

 

Prcs Current

 

 

 

 

 

 

 

 

 

 

CPU

 

Trip: CPU

 

 

 

CPU

 

Incomplete

 

 

 

 

 

 

 

 

 

Fault

 

Sequence

 

 

 

 

 

Fault

 

Failure or

 

 

 

 

 

 

 

 

 

 

 

Low Voltage

 

 

 

 

 

 

 

 

 

 

 

 

Ground

 

Trip

 

Alarm

 

 

 

 

 

 

 

 

 

 

 

Fault

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ground

 

External

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fault

 

Trip/Alarm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset/Test

 

 

 

 

 

 

 

 

 

 

 

 

Ready

 

 

 

 

 

 

 

 

Figure 2.2 Terminal block assignments

9

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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
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