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POWER SYSTEMS PROTECTION
A high voltage utility power system must provide a high
level of reliability. Reliable operation can only be insured with
robust protective systems design. Arris engineers have the expertise
to design protection systems for all types of transmission, distribution,
substation, large motor and distribution equipment.
PROTECTIVE RELAYING SYSTEM DESIGN
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Substation and Transformer Differential |
Substation 23kV Circuit Breaker |
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Transmission Line Impedance and Pilot Wire |
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Distribution Line Time O/C and Instantaneous with reclosers |
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Generator Protection |
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Utility Tie Current and Power Directional |
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Power Fuse Coordination |
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Large Motor Protection |
HIGH VOLTAGE POWER SYSTEMS STUDIES
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Accurate design requires detailed knowledge
of your power systems characteristics. Arris has the capability
to provide the system studies necessary for safe and optimally
designed systems.
Arris also has gained significant experience in retrofitting
existing systems. We can provide detailed schematic drawings
based on field investigation of existing equipment. Arris
utilizes EDSA electrical engineering software for engineering
analysis.
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Ground Fault Relay |
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Short Circuit Analysis and Fault Studies |
Metal-clad Switchgear & Relays |
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Protective Device Coordination Studies |
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Load Flow and Transient Analysis |
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Harmonic Studies |
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Insulation Coordination |
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Transient Overvoltage |
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Power Quality |
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Rate, Tariff and Revenue Studies |
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System Grounding Studies |
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Motor Starting |
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Power System Quality |
HIGH VOLTAGE POWER SYSTEMS SUBSTATION DESIGN TO 138
kV
Arris engineers provide field proven designs for modern
low profile substations.
We are also specialists in equipment retrofits in existing substations.
We have the necessary expertise to provide our clients with all aspects
of electrical and civil design necessary for functional substations.
Our engineers have years of experience in operating and maintaining
substations so we understand your needs for functionality and
ease of maintenance.
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Tension Bus |
Metal-clad Switchgear & Relays |
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Rigid Structure |
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Power Transformers |
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Power Circuit Breakers |
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Capacitor Banks |
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Instrument Transformers |
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Load Break Switches |
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Lightning Protection |
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Fuse Application |
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Ground Grid Design |
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The project involved the replacement of the building’s 500KVA dry-type unit substation with a new 750KVA transformer and 2000A 120/208VY secondary switchgear. 
The project involves the upgrade of the remaining 5KV medium voltage power system on campus to 15KV operation.
Upgrade
of the Electrical Distribution System.
System
upgrade at the treatment facility.
Upgrade
of the existing medium voltage power system.
Design
of a new customer owned 69 kv substation at the client’s manufacturing
site. 
