ETA Systems SM5505 manual Safety Interlocks, Lockout/Tagout

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Section 2 - Safety
Figure A

2.4 Safety Interlocks

This product incorporates a safety interlock circuit that functions as a secondary means of protection for personnel. Protective side panels and hazard warning labels provide primary protection. However, in the event one or more side panels are removed from the product prior to being de- energized, the safety interlock system will de-energize the power conditioner. The circuit consists of two safety interlock switches (one per each side access panel) located in the center of the top side frame of the power conditioner. The switches operate as a normally open circuit connected to the shunt trip coil of the input circuit breaker. See Figure A. Activating either of these safety

interlock switches causes a 24 VDC signal to energize the shunt trip coil of the breaker. The 24 VDC signal is derived from a low voltage, fused tap on the transformer secondary. The shunt trip circuit also uses stored energy from a capacitive circuit to ensure that the shunt trip mechanism will function even in the event of a power outage. The safety interlock switches are shown on the general circuit diagram found in subsection 10.1 of Section 10 of this manual.

If the power conditioner shunt trips as a result of removing the side panels, hazard- ous voltages will remain at the input voltage connection to the rear of the main cir- cuit breaker. Entering the enclosure under these conditions is classified as a Type 4 task under SEMI S2-0200 guidelines. This can be changed to a Type 1 task by disconnecting power at

the source before entering the enclosure.

2.5 Lockout/Tagout

 

 

The rotary handle of the main breaker is equipped with a

 

 

hinged center insert clearly identified with an arrow. The

 

 

rotary handle of the main breaker must be in the horizontal

 

 

position to proceed. See Figure B. Depress the insert on

 

 

the arrow on the left hand side causing the insert to extend

 

 

on the right revealing a slot to accommodate a locking

 

 

device as shown in Figure C. The lockout/tagout feature is

Figure B

Figure C

designed to prevent personnel from accidentally energizing

 

 

the power conditioner while maintenance, service or repair

 

 

is being performed. With the lockout/tagout engaged, hazardous voltages are still present at the rear of the input circuit breaker where input power feeds connect to the power conditioner. Entering the enclosure under these circumstances is classified as a Type 4 Task under SEMI S2-0200. Entering the enclosure may be classified as a Type 1 Task if power is disconnected from the power conditioner at the source.

Conditioned Power Center

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Contents CPC Series Conditioned Power Center Table of Contents Service and Support E a S E General Ansi Warning Notices SafetyInherent Hazards Alerts and LabelsWear protective gear before servicing internal parts Line Voltage Present With Machine Power OFFLockout/Tagout Safety InterlocksConformance with Applicable Laws and Regulations Product LiabilityEmergency Contact Information Product Purpose Product OverviewOptional Features Standard FeaturesFeature Unpackaging PreparationPreparation Figure D Shipping Crate Disassembly 10 to 20 kVA Installation Alternate Conduit Landing Locations Outer Panel RemovalMain Input Circuit Breaker Fixed Input Circuit BreakersProgrammable Circuit Breakers Isolation TransformerFigure G Transformer Primary Voltage AdjustmentGrounding Output Voltage Fine AdjustmentFigure J Lockout/Tagout ProcedureInput Power Connections Output Power ConnectionsModels With Optional Line Cord/Output Receptacles Restoring For Service Energizing the Power ConditionerOperation Orderly Shutdown Energizing the LoadConditioned Power Center Options Phase Loss/Low Voltage Detection and ProtectionExternal EMO Seismic AnchorageInput Power Conductor Restraints Semi S2-0200 CertificationSemi S2-0200 Compliant EMO Options Conditions Requiring Troubleshooting Troubleshooting/MaintenanceSource Circuit Breaker Trip Input Circuit Breaker TripsTvss Fault LEDs Illuminate Harmonic Filter Circuit Breaker Trips Out Routine MaintenanceService and Support Technical and Service Assistance Customer ServiceProduct Warranty CPC Series Schematic SpecificationsGPI Series 2000 Standard EMO GPI Series 2000 Semi S2 EMO Important ALL Work to be Done By a Licensed Electrician Output Voltage Fine AdjustmentTitle Rev. Letter Rel. Date Next Rev. Level Document Revision HistorySM5505- Rev. a 03/01/2006, 2006 ETA Systems39
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