PS4550 – Power Quality Analyzer

The PowerSight PS4550 Power Quality Analyzer is a versatile, easy-to-use power quality analyzer that is ideal for comprehensive power quality studies, energy audits, load studies, harmonic analysis, and more. The PS4550 couples small size with sophisticated triggering and event capture to answer your power quality questions.
Combined with our Windows PowerSight Manager software (PSM-A) and our extensive collection of measurement accessories, the PS4550 forms the PowerSight “Start-To-End Monitoring Solution,” providing the Most Efficient and Error Free Solution for doing Power Studies.
Made in USA!


Overview   |   Applications   |   Specifications   |   Customers   |   Support   |   Included / Recommended

The PS4550 is a true hand-held three-phase power quality analyzer with the features and accessories to achieve success in your power monitoring study. Its ergonomic contoured case, rugged construction, and small size make it ideal for field work. In addition, being part of the PowerSight “Start-To-Finish Monitoring Solution”, it has unique features and accessories that you will not find elsewhere to:

  • Save time
  • Eliminate errors
  • Achieve success.

Power Quality Analysis

Continuously examine every cycle of every input and trigger to a resolution of 8 microseconds. Trigger on swell, sag (dip), inrush, and advanced triggering types such as absolute and relative high-speed transient events. Choose your triggering mode:

  • Allow the trigger thresholds to be set automatically for you by the meter, based on the voltages it sees
  • Set the trigger thresholds yourself for voltages and currents, setting swell, sag (dip), inrush, absolute transient levels, and relative transient levels.

Power Logging

Monitor just about any power system or load in the world:

  • 3-phase delta/wye, 4-wire delta, open/grounded delta, 2CT/2PT – 3CT/2PT – 3CT/3PT metering circuits, split-phase, single phase, multiple single phase, and of course DC.
  • Select any of 72 different measurement types for regular recording of Voltage (V), Current (A), Power (KW), Apparent Power (KVA), True Power Factor (PF), Frequency (Hz), and THD.
  • Many other measurements available on the screen (such as elapsed & projected cost and KWH, peak demand period, duty cycle, “on” time, DPF, phase angle, individual harmonics…)
  • Reports can also include peak demand period and magnitude (both KWH and KVA), estimated and elapsed cost, & average KVAR with graphs and starting waveforms.
  • Summaries of the average, maximum, and minimum of each value, as well as the present values can be viewed on the analyzer’s display at any time.
  • All measurements and the initial automatic capture of waveforms can be viewed and analyzed in our Windows PSM-A software (power analysis features).
PS4550 Handheld

Harmonic Analysis

Log the THD of each input. Capture waveforms in the PS4550 with the press of a button at any time and then analyze the harmonic content with our Windows PSM-A software (power analysis features) as either a harmonic bar chart or as an exported Excel spreadsheet.

A Solution For Success

SureStart™ System

A patented AI system that warns you of possible connections errors prior to monitoring, with the push of a button.


ReportWriter Wizard™

Summarize data in a professional report with graphs and tables that turn raw data into meaningful visuals, with just a few clicks.


DataSetup Wizard™

Tell your PS4550 how to record data by setting triggering thresholds, using special operating modes, and much more.



Failing is not an option when monitoring for extended periods. Redundant memory storage, power, communications, and control come standard.


Unlimited Capabilities

The widest range of measurement accessories and a family of analyzers to buy and rent, all using the same Windows software.


TestPlan Manager™

Create a test plan and load it into your analyzers so they “know” the plan. Single click to retrieve, re-route, and re-name the data without error.

PS4550 and TestPlan Manager

What’s Included

PS4550 Front

PS4550 Analyzer

Deluxe Voltage Lead Set

Deluxe Voltage Leads

SD Memory Card

High Capacity SD Memory Card

CHG4 small

Wall Charger 120V or 230V


Latest PSM-A Software


Quick Start Guide


1-Year Deluxe Warranty

Why You Want This

The PS4550 is the third tier analyzer in the PowerSight family and a popular choice for electrical professionals. It is the only PowerSight power quality analyzer available for rent.
The PS4550 is the right analyzer if you:

  • Want to capture multiple views of power quality events in order to understand and mitigate power quality problems
  • Want a reliable, high-accuracy meter for almost any power quality analysis study
  • Want the complete Start-to-Finish Power Monitoring Solution
  • Want to be able to graph power-line voltage and current noise spectrum up to 100KHz (with FAO option)
  • Want the largest array of accessories for measuring any power in any situation

Who is Using PowerSight?

  • Electrical Testing Services
  • Engineering – Power Design / Analysis / Consulting
  • Electrical Contractors
  • Hospital / Health Care
  • Industrial Equipment Manufacturers
  • Industrial Processes
  • Power Generation / Distribution / Utilities
  • Hi-Tech Manufacturing / Information Tech
  • Industrial Suppliers/Distributors
  • Transportation
  • Chemicals
  • Oil and Gas
  • Construction / Architecture
  • Property / Facilities Management
  • Agriculture / Food
  • Biotech
  • Education
  • Education
  • Government
  • Military / Defense
  • Aviation
  • Research

Typical PS4550 Applications

Evaluate Quality of Incoming Power

Verify that your utility is delivering power within an acceptable voltage range over time. Check if nearby facilities are affecting your power. Verify if long power lines or over-capacity situations are having an adverse effect on your operations. Trigger on voltage swells and sags. Trigger of high speed transients. See what is happening in several different presentation viewpoints. PowerSight is unique in its ability to connect directly to distribution power (with optional medium voltage probes) to see what is happening at the source.

Evaluate Quality of Power Within Facilities to Find Failure Causes

If equipment is failing prematurely or is mysteriously taking itself off-line, you want to evaluate the voltage of the branch line and the current draw of parallel circuits. In addition to fine logging, trigger on swells and sags of voltage and inrush of current. Capture several views of what is happening in order to evaluate the source and the solution of the problem.


High Frequency Studies

When the Frequency Analysis Option (FAO) is enabled, the PS4550 effectively becomes a spectrum analyzer, capable of measuring high-frequency power line noise up to 100,000Hz. Common applications include where high-frequency noise could affect sensitive electronics, interfere with specialized manufacturing processes, cause high frequency currents, or disrupt communication signals.

Evaluate Harmonic Distortion of Power

Modern electronic equipment introduces harmonics into a power system, which can have unforeseen consequences. Safety risks related to overheating can arise but can easily be identified by an analyzer with harmonics analysis.

Verify ATS & Backup Power

Trigger on loss of power to record the response of your ATS and backup power systems. Just as importantly, judge the handover of power from battery to diesel and from diesel to utility upon recovery. Trigger on current spikes and voltage over/under voltages that can damage equipment.

CASW open with PK4564

Long, Extended Studies

Every PS4550 comes standard with expanded internal memory storage. What’s more, every PS4550 system includes an SD memory card that, when inserted in the analyzer, provides virtually unlimited data capacity. Verify currents for ampacity before adding new loads. Determine the load profile of any equipment, branch, or facility for power management and load shedding. Appropriately size breakers, transformers, power factor correction, and power backup.

Cost & Efficiency Analysis

Automatically view projected cost, run time costs, peak demand period, power factor profiles and more to verify projected savings, check utility bills, shed loads, minimize power factor penalties. Perform before/after and A/B analyses for informed decision making. Our ReportWriter Wizard™ provides clear summaries and comparisons with a minimum of effort.



General Specs

Category Notes
Size 3.89″ (9.86 cm) W x 7.72″ (19.61 cm) L x 1.58″ (4.01 cm) Deep at bottom end; 2.14″ (5.44 cm) Deep at top end
Weight 1.1 lbs (0.5 kg)
Operating Range 32 – 122 degrees F (0 – 50 degrees C) Relative humidity to 70% (non-condensing)
Power Requirement 12V DC @ 500 mA
Battery Life 8-10 hours after 4 hour charge
Battery Type Li-ion
Sampling Rate 8 microseconds for Voltage and Current
Safety 600V CAT IV, 1000V CAT III
SD Card Slot Accepts SD Cards to 32GB
Logging Period (Resolution) 1 Second – 99 Minutes
Logging Duration (Length of session) up to 2 years according to memory allocation
Communications Bluetooth Wireless and USB at 460.8 kbps, Wi-Fi optional

Voltage Measurement

Category Notes
Range 1-1000 Vrms Steady-State (direct input)
Display Range 1-6000 kV (using input ratios)
Accuracy ±0.1 % of reading ±0.3 Vrms

Current Measurement

Category Notes
Range Depends on probes
Display Range 1 mA – 6 Megamps (using input ratios)
Accuracy ±0.1 % of reading plus accuracy of probes

Frequency Measurement

Category Notes
Range DC, 22 – 200 Hz, 360 – 440 Hz Fundamental
Accuracy ±0.25%

Harmonics Measurement

Category Notes
Range 22 – 3000 Hz (50th Harmonic @ 50/60 Hz)
Accuracy ±0.25%


Category Notes
Swell/Sag (Dip)/Inrush 1/2 Cycle RMS
Transient Detection 8 microseconds, instantaneous
Harmonics Accuracy ±0.25%

Quotes from Our Customers

Who is Using PowerSight?

“I don’t think I can think of anything negative to say about Summit. When I call for help or have any questions, they are very responsive. They take care of their customers.”
– J.W., Health Care Industry
“Ever since our first rental, staff have been so very helpful with meeting equipment / rental needs.”
– J.M., Engineering Consulting Services
“Working with Summit technologies has been an awesome experience great technical support and training” “Summit technologies meets my requirements 100%”
– J.K., Oil and Gas Industry

See more customer reviews here

PowerSight Around the World

We have done business in 58+ countries and territories, and all 7 continents. That’s right, our analyzers have made their way down to Antarctica! An ever-expanding list, which country will be next?

PowerSight map of business done

Warranty / Maintenance Program

Every PowerSight analyzer comes with a standard 12-Month Deluxe Warranty. Deluxe Warranty Details


  • Repair or replacement of covered defects & failures during the warranty period
  • Free upgrades to the latest PSM-A analysis and reporting software, for enhanced capabilities
  • Free upgrades to the latest firmware for the analyzer for enhanced performance and new features
  • 1 calibration of the analyzer with one set of probes during each year of the extended warranty / maintenance period ($200/year value)
  • Replacement of out-of-tolerance batteries
  • Coverage of new product warranties extend to all PowerSight probes, adapters, carrying cases, & other optional items purchased with the analyzer

Extend or Renew Your Warranty / Maintenance Coverage



Extend new product warranty by 1 year



Extend new product warranty by 2 years


*must be purchased at the same time as the analyzer


Renew your Deluxe warranty for 1 year
$395 USD


Renew your Deluxe warranty for 2 years
$595 USD

Technical Support

Our technical support staff know our products and your applications. We design and support our products for both the first-time renter and the daily professional user. We are always improving the products and are committed to your success!
Types of support:

  • Answering questions about product operation and software usage
  • Troubleshooting errors and bugs
  • Assistance with finding & purchasing the right equipment for your needs
  • Maintenance requests for products under warranty
  • Whatever we can do to help you achieve success


For general questions and comments, email:
For specific issues, submit the Technical Service Request Form
For immediate service, call (925)-944-1212* or send us a message in the Live Chat box* in the bottom right corner of the page
*standard coverage is weekdays 8:00AM – 5:00PM PST

What’s Included

PS4550 Front

PS4550 Analyzer

Deluxe Voltage Lead Set

Deluxe Voltage Leads

SD Memory Card

High Capacity SD Memory Card

CHG4 small

Wall Charger 120V or 230V


Latest PSM-A Software


Quick Start Guide


1-Year Deluxe Warranty

Recommended Add-Ons

eFX6000 probe small

eFX6000 – Flexible current probe: 1-6000 amps

Wide Range Flexible Current Probe 1  –  6000 Amps

The eFX6000 is a flexible AC current probe covering the entire measurement range of 1 to 6000 amps. The rope is just 0.91 inches (23 mm) thick so it can fit through narrow places and is 24 inches long so it can wrap around multiple cables or a busbar (36 inch length is also available). Self-powered via our meter, so there are NO batteries that can run down.



LDCm – 480V Line-to-DC Converter

A favorite of professionals. The LDCm will power your analyzer off of the voltage that it is monitoring in the range of 100-480V. This allows locking your analyzer inside of a power panel with no power cord entering the closed panel. This provides maximum safety and security. Added safety is achieved by eliminating the use of extension cords. The small size and short voltage leads allow fitting the LDC into any space near your power analyzer in cramped electrical panels.


MEM2 small

MEM2 – Extended Memory Upgrade for PS4550/PS3550

Only for PS4550/PS3550/PS4500

The Expanded Memory Option is recommended for the PS4550 to provide plenty of space for extensive data logging and power quality data capture. It expands the internal memory four times (X4). Standard memory is adequate for limited power logging and power quality data capture.


5KVP Set

5KVPSet – 5kV High Voltage Probe Set

5 KVP Voltage Probes (3 Probes, Case)

The PowerSight 5KVPSet allows you to safely directly monitor medium voltages up to 5KV. It is a set of three probes. Great for use with 4160V motors. Your only choice when there are no PTs (Potential Transformers) available or you want to bypass PTs.



WAR41, WAR42, RWAR41, RWAR42

Choice of 1 to 2 years in addition to the new product warranty for PS4550 or PS3550

Other Relevant Items

PK4564-PRO+ small

PK4564 PRO+ – PS4550 System with MEM2 DXV, eFX6000, SD-MEM, CASW, WAR42, CHG1/CHG2, PSM-A, LDCm, BTA, USB-COMM

System Includes: PS4550 Analyzer, Expanded Memory (MEM2), Voltage Leads (DXV), (4) eFX6000 Current Probes, SD-MEM Card, CASW Weather-Resistant Carrying/Operating Case, 2-Year Deluxe Warranty, Wall Charger (CHG1 or CHG4), Mini Line-to-DC Converter (LDCm), Bluetooth Adapter (BTA), USB-COMM Cable, Quick Start Guide (QSG), and PSM-A Software


PK4564-PRO small

PK4564 PRO – PS3550 System with MEM2, DXV, eFX6000, SD-MEM, CAS3, WAR41, CHG1/CHG4, PSM-A, LDCm, BTA, USB-COMM

System Includes: PS4550 Analyzer, Expanded Memory (MEM2), Voltage Leads (DXV), (4) eFX6000 Current Probes, SD-MEM Card, CAS3 Hard Shell Carrying Case, 1-Year Deluxe Warranty, Wall Charger (CHG1 or CHG4), Mini Line-to-DC Converter (LDCm), Bluetooth Adapter (BTA), USB-COMM Cable, Quick Start Guide (QSG), and PSM-A Software. Purchase or Rent!


Or rent for $790/Month

PK4564 small

PK4564 – PS4550 System with MEM2, DXV, eFX6000, SD-MEM, CAS3, WAR41, CHG1/CHG4, PSM-A

System Includes: PS4550 Analyzer, Expanded Memory (MEM2), Voltage Leads (DXV), (4) eFX6000 Current Probes, SD-MEM Card, CAS3 Hard Shell Carrying Case, 1-Year Deluxe Warranty, Wall Charger (CHG1 or CHG4), Quick Start Guide (QSG), and PSM-A Software. Purchase or Rent!


Or rent for $750/Month

PK5064 RightTilt waveforms

PS5000 – PowerSight 5000 Power Quality Analyzer

Our Best Text Display Power Quality Analyzer. Excellent power monitoring and analysis coupled with sophisticated triggering and event capture. Eliminate errors and increase your productivity from start to finish with TestPlan Manager™ integration, SureStart™ connections expert, Data Setup wizard™, and ReportWriter wizard™.


[Does NOT include current probes or carrying case.]