PGA-016A Littelfuse Inc, PGA-016A Datasheet - Page 61

• Manufacturer Part Number: PGA-016A
• Description: BULK / WATERTIGHT COVER FOR PGR-6200 / PGR-7200
• Manufacturer: Littelfuse Inc

Specifications of PGA-016A

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

© 2009 Littelfuse
System-Grounding Diagrams
Ungrounded, Solidly Grounded and resistance-Grounded Systems
Advantages
• Operation possible with one faulted phase
SOLIDLy GROUNDED SySTEM
Advantages
• Eliminates transient overvoltages
• Selective tripping possible
RESISTANCE GROUNDED SySTEM
Advantages
• Reduced point-of-fault damage and Arc-Flash risk
• Eliminates transient overvoltages
• Simplifies ground-fault location
• Continuous operation with a ground fault
• Selective tripping possible
• No ground-fault Arc-Flash hazard
UNGROUNDED SySTEM
GROUND
NEUTRAL
GROUND
•
POWR-GARD
NEUTRAL
®
Protection Relay Catalog
DISTRIBUTE
SYSTEM
CAPACITANCE
PHASE C
PHASE A
PHASE B
PHASE C
PHASE A
PHASE B
PHASE C
PHASE A
PHASE B
59
• Costly point-of-fault damage
• Cannot operate with a ground fault
• Ground-fault Arc-Flash hazard
• Increased Arc-Flash risk
Disadvantages
• Ground faults are difficult to locate
• Transient overvoltages damage equipment
• Failure of the neutral-grounding resistor renders current-
Disadvantages
Disadvantages
sensing ground-fault protection inoperative
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