POWER CIRCUIT BREAKER TESTING

EPCS test services include all components of low, medium and high voltage power circuit breakers. Excellent training and top of the line test equipment assure expected power circuit breaker performance for new installations, as well as ongoing thorough EPCS preventative maintenance.

Testing Capabilities:

• Insulation Resistance Measurements
• Doble Power Factor (Dielectric Loss)
• Contact Resistance Measurement
• Contact Time, Stroke, Velocity, Over-Travel & Wipe
• SF6 Moisture & Purity Analysis, Leak Detection including Gas Fill
• Bushing Current Transformer Ratio, Polarity & Saturation

RELAY TESTING

EPCS field engineers and technicians have in-depth knowledge of protective relaying applications, inspections and testing. Utilizing the latest Doble three-phase power system simulator and Protest or Enoserve RTS software, EPCS can support all relay acceptance and maintenance testing requirements. Computerized relay testing ensures a high level of accuracy and provides a database of test routines and test results.

Testing Capabilities:

• Acceptance & Commissioning Plans
• Periodic Maintenance
• End-to-End Schemes
• Application Verification
• Troubleshoot & Restoration
• Event Record & Root Cause Analysis

Low & Medium Voltage Switchgear Testing

Low and medium voltage switchgear testing ensures the integrity of new and existing equipment. The proper operation of equipment is essential to plant operation and personnel safety. EPCS provides a range of engineering, inspection and electrical testing services customized to commercial and industrial facilities that utilize switchgear. Routine electrical inspection and testing of switchgear helps to identify problems before they become difficult maintenance issues or cause catastrophic damage that can be costly to repair. EPCS engineers utilize industry leading software such as ETAP and SKM Power Tools for load flow, short circuit, coordination and arc flash studies.

Engineering Capabilities:

• Coordination & Short Circuit Studies
• Load Flow Studies
• Arc Flash Studies
• Load Monitoring & Analysis

Testing Capabilities:

• Visible & Mechanical Inspection
• Bus Verification (Bolted Electrical Connections, Insulation Resistance, AC High Potential, Dielectric Loss)
• Voltage Transformers (Insulation Resistance, Turns-Ratio, Polarity, Power Factor)
• Current Transformers (Insulation Resistance, Ratio, Polarity, Saturation)
• Control Power Transformers (Insulation Resistance, Ratio)
• Circuit Breakers (Insulation Resistance, Contact Resistance, Vacuum Bottle Integrity, Primary Current Injection)
• Protective Relay Programming & Testing

POWER TRANSFORMER TESTING

One of the most critical and costly pieces of electrical apparatus in any substation is the power transformer. EPCS test engineers and technicians understand that power system reliability is dependant upon high quality transformer testing. EPCS Acceptance Testing provides the baseline data required to track power transformer insulation and oil quality. Maintenance Testing provides historical data and assesses the suitability for continued service and reliability.

Testing Capabilities:

• Doble Insulation Power Factor – Windings & Bushings
• Doble High Voltage TTR
• Doble SFRA Testing
• BCT Testing
• Owner’s Rep Factory Test Observation
• Cooling Alarm, Control and Trip Circuits
• Field Oversight of Factory Installation
• Insulation Resistance Measurements
• Turns-Ratio
• Excitation Current
• Winding Resistance
• Oil Sampling & Analysis
• Surge Arresters
• Bushing Current Transformers
• Mechanical Damage

CABLE TESTING

EPCS cable testing services can confirm the electrical condition of new installations, including insulation deterioration and fault locating. Utilizing AC or DC Hi-Pot equipment, EPCS can perform installation and maintenance tests on cable through 69 kV class.

Insulation resistance tests provide a nondestructive method of determining the condition of cable insulation. Megohmmeters are used to accurately measure insulation resistance of cables rated at 15 kV and below.

Testing Capabilities:

• Insulation Resistance Measurements
• Fault Location

EARTH & GROUND SYSTEM RESISTANCE TESTING

Grounding systems are a vital part of any electric utility, industrial or commercial facility. An unreliable ground can cause severe equipment damage and present dangerous working conditions for personnel. EPCS engineers and technicians have an in-depth knowledge of grounding system design and test methods to ensure accurate and meaningful results.

Whether it is a typical substation ground grid design, or a detailed electrical interference study; EPCS engineers utilize industry leading software from Safe Engineering Services & Technologies Ltd. to perform our analysis. EPCS can combine field testing with computer modeling to verify measurement results.

In addition to long standing earth resistivity and grounding system resistance test methods, EPCS also employs some of the latest equipment available to measure touch and step voltages. Again, these measurements can be compared to computer models to determine whether or not your grounding system is providing you with the level of protection needed.

Engineering Capabilities:

• Substation Ground Grid
• Wind Turbine Tower Grounding
• Electrical Interference

Testing Capabilities:

• Soil Resistivity (Wenner 4-Point)
• Ground Grid Resistance (Fall of Potential 3-Point)
• Step & Touch Voltage
• Transmission Tower Ground (2-Point or Clamp)

BATTERY SYSTEMS TESTING

Battery maintenance and inspection is key to any protection and control system. Service reliability can be severely jeopardized without a battery bank that is fully capable of supporting continuous DC load and tripping circuit breakers as called upon.

EPCS provides a full range of battery maintenance and testing services to ensure that your battery bank is operating at full capacity. EPCS utilizes the latest equipment and software to ensure the highest level of measurement accuracy and the least impact to operations during testing. Utilizing specialized DC clamp-on ammeter’s and networked battery voltage monitors, EPCS has the capability to perform battery discharge testing without disconnecting the battery bank from the equipment it serves.

Testing Capabilities:

• Internal Cell Resistance
• Cell Voltage
• Specific Gravity & Fluid Temperature
• Battery Capacity with Online Cell Voltage Measurements

THERMAL IMAGING

Infrared imaging and resultant temperature analysis has proven to be a valuable resource in accurately and effectively monitoring substations, transmission facilities and its associated equipment. Many of the problems encountered with electrical equipment is directly related to heat. Non-contact infrared thermographic scanning can be used to visualize, analyze and diagnose electrical problems safely and efficiently.

Using this infrared technology together with EPCS Infrared Inspection Services as part of a routine preventative maintenance program, can yield cost-saving benefits by preventing unscheduled downtime through early identification of required corrective action. EPCS trained thermographers can assist with all your thermal imaging needs to increase facility safety, reliability and function.

Testing Capabilities:

• Infrared Thermography
• Leak Detection

POWER QUALITY TESTING

Today’s industry standards place stringent requirements on electrical system power quality. Modern manufacturing equipment and processes are susceptible to even the slightest variations in power harmonics. At the same time, it is modern electrical equipment including computers and motor drives that are the source of many power quality issues.

EPCS field engineers and technicians have the knowledge, experience and equipment to diagnose a variety of power quality problems. Together with Electrical Consultants, Inc. (ECI) engineering staff, a comprehensive evaluation is made to provide our clients with recommendations for corrective action to achieve safe, efficient and proper equipment operation.

Testing Capabilities:

• Power Quality Survey
• Online Waveform Analysis
• Demand Profiles
• Harmonics
• Voltage Issues
• Transients
• Power Auditing
• Inrush

MAINTENANCE SERVICES

The experienced testing and engineering staff of EPCS can assist Renewable Energy Developers in providing ongoing maintenance, inspection and testing for all types of electrical equipment.

From commissioning equipment to setting and testing of protective relays, EPCS can handle all of your facility startup and preventative maintenance needs. Services are available on a project or annual testing basis. Service plans offer the advantage of immediate dispatch of personnel and equipment for critical problems. Where required, supplemental labor and equipment support is provided through our alliance agreements with contractor-partners nationwide.

Preventative Maintenance:

• Monthly Inspections
• Annual & Triennial Services
• Calibration & Testing
• Remote Monitoring

Corrective Maintenance:

• Circuit Breakers/Switches
• Transformer Problems
• Other Apparatus
• Equipment Replacement

Emergency Maintenance:

• Equipment Failure
• Repair & Restoration
• Guaranteed Response Time
• 24/7 Hot Line