Delivering the next generation of service today.

Testing Services

In addition to regularly scheduled maintenance testing, H A R T provides third party acceptance testing on electrical apparatus regardless of manufacturer. While some testing organizations work directly for switchgear manufacturers, we remain independent. We will provide impartial reports on equipment status and actions required for the correct operation of your switchgear.

At H A R T High-voltage we feel it is important not only to have qualified technicians to operate test equipment, but it is imperative to have the latest, most advanced test equipment available. We utilize test equipment from Doble, Meggar, AVO, Vanguard, Multi-Amp, Fluke, Biddle, Enoserve and others.

We ensure that our equipment is regularly maintained and calibrated in order to provide the highest caliber of servicing and testing in our area and industry. Below is a list of common testing services we provide. If you have any questions or don’t see a test you would like performed on your electrical equipment, give us a call or send us an email.

•NERC Compliance
•Doble(r) Power Factor Testing
•Ground Fault
•Ground Resistance
•High Potential (Hi-Pot)
•Load Bank
•Meter Calibration
•Protective Relays
•Rotating Apparatus
•Time Travel Analysis
•Transformer Commissioning
•Transfer Switches
•DC Functional
•Circuit Verification
•Sweep Frequency Response Analysis
•Turns Ratio
•Winding Resistance
•Insulating Fluid Analysis
•Contact Resistance
•Insulation Resistance

H A R T- Field Services

Maintenance Services

We perform electrical testing, maintenance and repairs on all electrical apparatus. We provide cost-effective preventative maintenance with minimal down-time of your electrical system. We identify equipment at risk of failure and recommend corrective actions. A plan is then implemented to prevent future failures and improve overall performance of switchgear.

if you don't see the apparatus you need testing or maintenance provided on, give us a call or send an email.

•Switchgear and Switchboard Assemblies
•Transformers, Dry-Type
•Transformers, Liquid-Filled
•Cables, Low, Medium and High-Voltage
•Metal-Enclosed Busways
•Switches, Air, Low-Voltage
•Switches, Air, Medium-Voltage, Metal-Enclosed
•Switches, Air, Medium-and High-Voltage, Open
•Switches, Oil, Medium-Voltage
•Switches, SF6, Medium-Voltage
•Switches, Cutouts
•Circuit Breakers, Air, Insulated-Case/Molded-Case
•Circuit Breakers, Air, Low-Voltage Power
•Circuit Breakers, Air, Medium-Voltage
•Circuit Breakers, Oil, Medium-and High-Voltage
•Circuit Breakers, Vacuum, Medium-Voltage
•Circuit Breakers, SF6
•Circuit Switchers
•Protective Relays, Electromechanical and Solid-State
•Protective Relays, Microprocessor-Based
•Instrument Transformers
•Metering Devices, Electromechanical and Solid-State
•Metering Devices, Microprocessor-Based
•Voltage Regulators
•Load Tap-Changers
•Grounding Systems
•Ground-Fault Protection Systems
•Motor Starters
•Motor Control Centers
•Direct-Current Systems, Batteries & Chargers
•Surge Arresters
•Outdoor Bus Structures
•Automatic Circuit Reclosers and Line Sectionalizers

H A R T- Engineering Services

Repair Services

When electrical equipment fails, call H A R T High-voltage Apparatus Repair & Testing.

Contact us 24 hours a day for immediate on-site damage assessment, to schedule a planned outage or utilize our shop services. We have more than 20 years of experience with repairs, rebuilds and retrofits of electrical switchgear:

•Transformers-All Sizes-types
•Generator controls
•Switches-Open Air, Fused, Oil, Vacuum
•Bus Duct
•Station Batteries and Chargers
•Bushings-Transformer and Circuit Breaker
•Surge/Lightening Amestors
•Insulators and Stand-Offs
•Metering Devices
•Outdoor Bus Structures
•Load Tap Changers
•Circuit Switchers
•Automatic Transfer Switches
•Digital Trip Unit Retrofits
•Bench Testing
•Circuit Breakers-All types
•Circuit Breaker Retrofits
•Motor Overload Devices
•Motor Starters
•Protective Relays
•Protective Relay Retrofit
•Fused Switches Retrofit
•Oil Cut-Out Overhaul
•Voltage Regulators

H A R T- Field Repairs

Transformer Oil Processing

We are proud to be one of the few companies in California and Nevada that has a High-Vacuum Mobile Purification Unit that we can bring to your site.

H A R T High-voltage has the equipment, expertise and experience to handle your insulating fluid servicing needs. Whether you need to vacuum fill a new transformer, degasify or dehydrate existing oil or drain and refill a transformer due to repairs or internal inspections, you can trust us to do the job right.

High-Vacuum Mobile Purification Unit

•Processing Capabilities: 1800 USGPH
•Electric Heater Capacity: 108 KW - Four (4) stages
•Vacuum Pump: Rotary Piston Vacuum Pump w/150 CFM capacity
•Vacuum Booster: Rotary Piston Booster Pump w/1600 CFM capacity
•Pre-Filter: 5.0 Micron
•Polishing Filter: 0.5 Micron
•Vacuum Filter: 20 each Dispersion Coalescing Filter Elements
•Doble Hygromter: Inlet and Outlet
•Hastings Vacuum Controller/Transmitter: 2 each Analytical Locations
•External Inlet Booster Pump: 800 USGPH
•Manual and PLC Controlled: Operate MMI or Automatically
•Cold Trap: Between Vacuum Pump and Vacuum Booster

In addition to oil processing, H A R T High-voltage has the equipment, experience and capability to complete other repairs and/or upgrades you may elect to perform while your transformer is drained of oil, such as insulation dryouts, bushing replacements, LTC repairs/upgrades, leak repairs, internal inspections, etc.; combining services can minimize costs and transformer downtime.

H A R T- Engineering Coordination Studies