background image

Positive Grounding Graphic Illustrations 

 

Fig. 1 – This system is grounded properly on the battery circuit only. Charging and Load Control will 

function properly. 

Summary of Contents for TRISTAR TS-MPPT-60

Page 1: ...n help keep voltage surges induced from nearby lightning from affecting the power electronics equipment and loads This is not an option for systems that include ground fault protection as it will be tripped if there is more than one ground bond A Single Point to Earth In addition to negative grounded systems all Morningstar controllers can be used in positive grounded systems if they are wired in ...

Page 2: ...Positive Grounding Graphic Illustrations Fig 1 This system is grounded properly on the battery circuit only Charging and Load Control will function properly ...

Page 3: ...rly Fig 3 This system will not charge properly It has been grounded in two locations and a ground loop will be created around the TriStar charge controller The controller will now no longer be able to properly control charging current since its circuit has been bypassed ...

Page 4: ...e the chassis can be grounded the same for a positive ground system as it is for a negative grounded system Grounding the chassis is required by code in many jurisdictions Surge protection devices include a connection to the equipment ground in order to function properly to limit voltage surges from nearby lightning strikes Many Morningstar controllers include a chassis ground terminal If it doesn...

Page 5: ...at the MeterHub provides an isolated connection between the MeterBus ports when creating a MeterBus network Therefore MeterBus networks will not be problematic except where the direct connection between a controller and a Relay Driver can cause harmful current through the MeterBus connection The systems below are examples of where the use of a single pole breaker would not be an option When in dou...

Page 6: ...harm to the serial communications Also note that the fuse for the power circuit to the EMC 1 should be installed on positive wire Fig 6 TriStar MPPT and Relay Driver system with an RJ 11 MeterBus connection The MeterBus RJ 11 creates a common negative connection between the controller and relay driver The single pole battery breakers as shown on the left will not break the negative connection to t...

Page 7: ...2 device is another option Ground fault Protection and Positive Grounded Systems One last consideration is Ground Fault Protection Ground Fault Protection protects the system from ground faults that may be created in the PV circuit Morningstar s Ground Fault Protection products GFPD 150V and GFPD 600V can be used with either negative or positive grounded systems to detect and interrupt ground faul...

Reviews: