PDX DCEO Qualification Card

Explain what the SPCC is and where can it be found?

Spill Prevention Control and Counter Measure

Site Specific. Policy.amazon.com

Explain what you do if you find a safety issue onsite?

Notify your manager or lead, cut a safety ticket.

Explain what you should do if you are injured or shocked on the job, when should you report it?

Establish a safe system condition. Report it as soon as it happens, but no later than the end of shift.

Explain where all Amazon safety rules located?

policy.amazon.com

At what point does the Critical Switching Team need to perform switching?

Any operation which will realign customer load power source or reduce customer load planned redundancy.

Define an open and closed transition and list examples of each

Open Transition: Original power source breaker is opened before closing new power source breaker. This is done to prevent inadvertent backfeeding in addition to accidentally paralleling out of phase sources.. An example of this is MCBU/MCBG transitions.

Closed Transition: New power source breaker is closed before opening original power source breaker. This is done to ensure continuity of power. An example of this is MBP/IOB.

Define LLT and what is it?

Live load transfer, preventative maintenance

Define PUE and how it is calculated

Power Utilization Efficiency. Total Load/Critical Load

Define the following terms and discuss their purpose: ATS

Automatic Transfer Switch.

Define the following terms and discuss their purpose: Breaker

Switching device that can be used to start/stop current and provide automatic protections.

Define the following terms and discuss their purpose: CDB

Critical Distribution Board.

Define the following terms and discuss their purpose: HMI

Human Machine Interface.

Define the following terms and discuss their purpose: PDP

Power Distribution Panel.

Define the following terms and discuss their purpose: TVSS/SPD

Transient Voltage Surge Suppressor is a device designed to protect equipment from power surges and voltage spike. TVSS is mounted on the switchgear to protect downstream equipment, it does this by grounding the energy spike using unidirectional diodes.

Define the following terms and discuss their purpose: USB

Utility Switch Board.

Describe in detail how the IOB/MBP kirk key system works

There are three solenoid key release units and two associated keys. One unit for each breaker (MBP and IOB) and a unit for the command solenoid. By removing the key from the command solenoid unit, the UPSs are locked into bypass mode and the breakers are allowed to operate. Keys are turned CW to permit breaker operation or CCW and removed to prevent breaker operation.

Describe what will happen If we are on generator and power becomes unacceptable.

10 Second Gen Source Loss timer

If utility if available: Gen Breaker Open, 2 Second Open Transition Time Delay, Utility Breaker Close. Generator 5 minute cooldown.

If utility is not available: 90 second dead bus timer, ATC transfer to Catcher lineup

Discuss the difference between a limited approach boundary and a restricted approach boundary as defined by NFPA70E

Briefed personnel may enter limited approach. Only electrically insulated personnel may enter the restricted boundary.

Discuss the following with regard to the switchgear HMI/AMCOP: Define “Open transition delay” and what its purpose is

Breaks power source connection before making contact with new source. A timer then begins (2 seconds) to ensure breaker is open and system is de-energized before closing subsequent breaker This is done to prevent accidental backfeeding of generator into a utility line and inadvertent paralleling of out of phase sources.

Discuss the following with regard to the switchgear HMI/AMCOP: Discuss the purpose of the HMI/AMCOP

A means for open transition, automatic switching of the critical load between the utility and generator power sources