APD - 600

The APD-600 is a high-performance anti-pumping relay designed for medium and low-voltage switchgear and control panels. It prevents repeated or unintended re-closing of circuit breakers or contactors when the closing circuit remains engaged, thereby protecting your equipment and enhancing system reliability.

Key Features:

• Prevents “pumping” — that is, a close command being held while a fault or trip condition still exists, resulting in repeated close-open cycles.

• Rapid response: The product listing indicates a response time of approximately 20 ms for the APD-600 (“Rly 4C/O. ‘X’ Vtg. 20 mS”) which implies very fast operation. 

• Four change-over (C/O) relay contacts for flexible wiring or interlock logic. 

• “X-Vtg” (wide-voltage) variant offering flexibility across control-voltages and applications.

• Compact, panel-friendly format, facilitating installation in MCCs, automation panels and distribution boards. 

Applications:

• Use in motor control centres (MCCs) and control panels where circuit-breaker/contactor closing coils are used and there’s a risk of holding the close push-button beyond the safe interval.

• Ideal for switchgear assemblies in industrial plants, utilities, commercial buildings and any system requiring protected, reliable breaker operation.

• Suitable for systems requiring both safety interlocking and indication logic due to its multiple contacts.