intro Digital Flashcards
2N
A completely redundant configuration in which every component has its own dedicated backup unit.
AC Power
Alternating Current; AC’s current flow changes between positive and negative because of electrons - electrical currents come from the flow of these electrons, which can move in either a positive (upwards) or negative (downward) direction. This is known as the sinusoidal AC wave, and this wave is caused when alternators at power plants create AC power.
AST
Above Ground Storage Tank; provides fuel storage for generator systems that are above ground and accessible.
ATS
Automatic Transfer Switch; A switch designed to automatically transfer loads between two independent AC power sources, or from a AC source to a backup generator. Typically, of the mechanical kind, these do not provide a continuous source of power and would be considered an open transition, with a brief interruption between switching.
BMS
Building Managment System; provides real time status of electrical, cooling and fire protection systems. Provides real time alarm alerts. Status and alarms can be viewed from various locations throughout the DC.
CMMS
Computerized Maintenance Management System. (EX. ServiceNow and MCIM)
CRAC
Computer Room Air Conditioner; utilizes direct expansion (DX) to provide cooling to the data center. Cools server rooms, UPS areas, and electrical distribution gear.
COLO
Colocation. Two or more tenants sharing the same space separated by a physical barrier, most notably a cage.
Data Center
A physical facility designed to support computer intensive operations. Defined as the physical space, power, cooling, and fire suppression of the raised (or non-raised0 floor environment.
DC Power
Direct Current; DC power is far more consistent in terms of voltage delivery, meaning that most electronics rely on it and use DC power by using a rectifier, often built into device’s power supply.
DCIM
Data Center Infrastructure Managment
DCM
Data Center Manager
DR
Distributed Redundant; a redundancy setup with three or more UPS’s, where one serves as backup for the others in case one of them fails.
EOH&S
Environmental Occupational Health & Safety; focuses on prevention of work related injuries and diseases and overall protection of health and safety in the workplace.
EOP
Emergency Operating procedure; detailed step by step procedure outlining what actions to take during an emergency.
EPO
Emergency Power Off
FPT
Fan Powered Terminal; an air terminal unit which contains a primary air inlet as well as a local motor or blower assembly and is used for in a dedicated outdoor air system i.e. RTU’s. Provides comfort cooling/heating. Used for PBB spaces.
Grounding
An electrical connection to the ground that provides an alternative path for excess electricity that may otherwise course through a victim of electrical shock and damage equipment.
HMI
Human Machine Interface; A user interface or dashboard that connects a person to a machine, system, or device.
HSO
HVAC Shutdown Override; Located at the main exit doors of Mission Critical Areas. HSO’s are used to prevent impact to critical HVAC systems in situations where maintenance is being performed that could inadvertently affect the cooling system.
HV
High Voltage
HVAC
Heating Ventilation and Air Conditioning.
IDF
Intermediate distribution frame
IR
Incident Report; categorized as green yellow and red.
LFACP
Local Fire Action Control Panel; monitors Alarm, Supervisory and Trouble signals for a specific Data Hall.
kW
one-thousand Watts.
kVA
one-thousand kilovolt amperes
LV
Low Voltage
MAU/MUA
Makeup Air Unit; designed to provide ventilation via fresh outside air, dehumidification of outside air, and pressurization of the space. Used for critical spaces.
MEO
Manager Engineering Operations
MEP
Mechanical Electrical & Plumbing
MFACP
Main Fire Action Control Panel; monitors Alarm, Supervisory and Trouble Signals for the entire data center.
MFR
Multi-Function Relay; a configurable device with multiple inputs and outputs. Can perform such tasks as switching high voltage loads with a low voltage control signal, amplifying weak signals, providing isolation between circuits, and allowing for the automation of complex processes.
MMR
Meet Me Room; a place within a colocation site or carrier hotel where telecommunication services can physically connect to one another and exchange data.
MVA
One-Million-Volt amperes
MW
One-Million Watts
MOP
Method of Procedure; a verified script to perform work activities with potential to affect mission critical operations
MTM
Market Technical Manager; title for regional manager above DCM
MV
Medium Voltage
N
represents the ‘need’ of the critical load; this is the minimum power cooling needed to support critical load.
N+1
A configuration in which an “extra” back-up unit supports two or more of the same primary units. for example, if two generators were required to support a datacenter, an N+1 configuration would include a third generator to serve as a back-up unit in the event either of the primary generators were to fail.
O&M
Operation and Maintenance
Panelboard
Mounting enclosure for multiple circuit breakers
PBB
Power-Base Building; refers to the shell and non-critical areas of a data center facility.
PDU
Power Distribution Unit; Receives and transforms 480V, 3 phase power to 120/208, 3 phase power and contains multiple output distribution points.
PLC
Programmable Logic Controller, (the brains) and industrial computer control system that continuously monitors the state of input devices and makes decisions based upon a custom program to control the state of output devices.
PM
Preventative Maintenance; Regularly scheduled maintenance performed on system components to ensure its proper operation. Done to prevent equipment issues or failures.
POE
Point of Entry; Telecom conduits entering a space or POE Room
POP
Point of Presence; This is a crucial space that facilitates connectivity withing the DC.
Power Factor
A measure of power efficiency. Ratio of real power to apparent power denoted by a number between 0 and 1. the closer the number is to one, indicates that the power distribution system is experiencing low levels of loss, which provides lower energy costs.
PPE
Personal Protective Equipment
PUE
Power Usage Effectiveness; this is a ratio of total load divided by IT load. The closer to 1.0, the more efficient the data center is using the data center is using its power.
Reactive Maintenance Repair
a corrective action taken after a component failure.
Redundant
A configuration in which one or more components (e.g. generators) has a back-up unit that automatically takes over in the event of the failure of the primary unit.
ROP
Remote Operating Panel; HMI used to interact with out PLC.
RPP
Remote Power Panel; Enclosure containing branch circuit breakers that feed receptacles in server racks.
RTU
Roof Top Unit; an air-handling unit, defined as either a “recirculating” or “once-through” design, made specifically for outdoor installation. They most often include, internally, their own heating and cooling devices. Used for PBB.
Scale
Enterprise/Single tenant customer
SLA
Service Level Agreement; requirements per lease for datacenter quality, cooling temperature standards, etc. There are large penalties associated with not meeting SLA requirements for our customers.
Static Presure
underfloor air pressure for raised floor designs, controlled typically by the CRAC units fan speed. Measured in inches of Water Column (WC), which is related to PSI (pressure per square inch).
SOO
Sequence of Operations; shows, system is to be designed and how it gets set up. Each Suite has its own SOO.
SOW
Scope of work; provides details on specific work to be performed for a given project, maintenance or repair.
SPD
Surge Protection Device; a device designed to protect electronic equipment from unwanted power surges or spikes.
STS
Static Transfer Switch; and automatic transfer switch designed to transfer critical loads between two independent AC power sources without interruption or with a transfer time of less than a cycle (20ms). This would be considered a closed transition.
Switchgear
is composed of electrical disconnect switches, fuses or circuit breakers used to control, protect, and isolate electrical equipment.
Three Phase Power
a power system featuring three conductors whose voltage wave forms are offset in time. This type of power is typically used to drive motors and other industrial electrical equipment.
TSR
Troubleshoot/Repair
TVSS
Transient Voltage Surge Suppressor; like an SPD, this device can protect the electrical systems from damages of transients, spikes or surges
UPS
Uninterruptible Power Supply; a standby power unit that is activated if primary power source or unit fails, which ensures that datacenter operations continue with no disruption in service.
VDC
Volts DC
Vista Switch
handles switching between high voltage utility sources, typically fed from substations.
VAC
Volts AC
