Eaton AQB-L400 Instructions For Use Manual

Page 2Functional DescriptionAn Eaton AQB-L400 Adapter Kit provides the means forconverting the normally male configured primaryconnections of an AQB-L400/LL400 current limitingcircuit breaker to female configured primary connections,normally associated with an AQB-LF400 circuit breaker(Figure 1-5). A close out plate, attached directly to thefront of the AQB-L400 circuit breaker with four mountingscrews, provides the deadfront cover required to complete the conversion.The adapter kit itself is comprised of line and load sideadapter blocks, six female spring loaded primary connection adapters, a close out plate, and four mountingscrews (Figure 1-3).PART 2. INSTALLATION/OPERATIONa. Turn off all power.b. Remove LF400 breaker, if applicable.c. The standard male type slip connectors shall beremoved from the AQB-L400/LL400 circuit breaker.The threaded end of the female connection adaptersattaches in their place. The other end of the femaleconnection adapters provides the female slip connections required for the AQB-LF400 configuration.d. Mount the tulips to the line and load ends.1. Note that 4 tulips are offset mounted on theirpads and 2 tulips are centered (Figure 1-4).2. The centered tulip assemblies mount to the center pole.3. Offset tulip assemblies mount to the left and rightpoles, with the tulips oriented to the outside ofthe breaker.4. Before tightening the hardware, check the alignment using the adapter block as a template.5. If the alignment is correct, tighten the hardware.I.L. 15578AA CAUTIONTO P ROP ERLY REMOVE THE ADAP TED AQB-L400/LL400 CIRCUIT BREAKER, UNSCREW THE BOLTSLOCATED IN THE ADAP TER BLOCK, NOT THEBREAKER MOUNTING BOLTS LOCATED IN THEBREAKER FRAME.e. The adapter block is mounted to the circuit breakerusing breaker mounting bolts.f. The modified breaker is mounted to the LF400mounting blocks using hardware supplied with theadapter block.g. After mounting the breaker on the LF400 block,attach the close out plate to the front. Once attachedto the front of the AQB-L400/LL400 circuit breakerwith four mounting screws, the close out plateinsures a deadfront installation. In addition, the closeout plate provides front access to the circuit breaker'soperating handle, trip unit adjustments, lower breakermounting bolts and megger holes. Access to theadapter block mounting bolts, however, requiresremoval of the close out plate.h. Since the Eaton Adapter Kit applied to an AQBL400/LL400 breaker is a direct replacement for an alreadyinstalled AQB-LF400 breaker, modificat ions to theexisting bus mounting system are not required. Analready adapted AQB-L400/LL400 breaker can bemounted on existing blocks, and secured in placewith the provided upper and lower adapter blockbolts (Figure 1-6).Fig. 1-4. Closeup of Tulips Showing Center and OffsetMountingsEffective October 1997I.L. 15578AFig. 1-5. Rear View of Navy Type AQB-L400 CircuitBreaker and Adapter Kit Combination Displaying Female Configured Primary ConnectionsEffective October 1997Page3Fig. 1-6. Navy Type AQB-L400 Circuit Breaker andAdapter Kit Combination Plugged Into MaleMounting BlocksIn general, follow the mounting procedures normally usedfor mounting any AQB-LF400 circuit breaker, wheninstalling the AQB-L400/LL400 circuit breaker andAdapter Kit combination. Follow the instructions and procedures provided with the AQB-L400/LL400 circuitbreaker when operating the AQBL400/LL400 andAdapter Kit combination. Refer to Technical Manual1240C33H01PART 3. REPLACEABLE PARTSa. L400/LL400 plus Adapter Kit: See Eatonb. Adapter Kit: 6590C82G01c. LF400 Mounting Block: 6590C82G03

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