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TSi Power Limited is a youthful organization setup in 2011 at Vadodara (India) as a joint venture with TSi Power, USA. We manufacture, export and supply power conditioning equipment for CNC production machinery, robotics & factory automation, telecom, OEM’s, security, hospitals, laboratories, IT, residential and commercial applications to clients in Asia and Africa. From engineering & product development to product application, installation and operation support we have every aspect covered. 

At TSi Elecpower we manufacture various power conditioning equipment based on TSi-USA’s IGBT Pulse Width Modulation (PWM) Technology. Our products are manufactured to exacting international standards so as to give continuous, uninterrupted service to clients across the globe. 

Our strengths lie in our unique, proven PWM converter technology & our young professional team, both of which have put the Indian company on a strong international foundation in a short span of time. 

Our application engineers are well trained in our technology & are fully equipped to trouble-shoot client’s problems by providing the right solutions. 

Count on us, therefore, to solve your power quality issues in your next project.

Company Factsheet

Nature of Business: Exporter
Additional Business:
  • Buyer-Company
  • Manufacturer
Company CEO: Rajesh Pande
Registered Address: 154-155, Siddhi Industrial Infra Park, Waghodia,, Vadodara- 391760, Gujarat, India
Total Number of Employees: 51 to 100 People
Year of Establishment: 2011
Legal Status of Firm: Limited Company (Ltd./Pvt.Ltd.)
Annual Turnover: Rs. 25 - 50 Crore
Import Export Code (IEC): 05110*****
Tan No.: DELT0*****
GST No.: 24AADCT7711M1Z5
CIN No.: U31101DL2011PTC214651

Original Equipment Manufacturers

Original Equipment Manufacturers

TSi Elecpower provides custom-engineered solutions for a variety of industries, which can be adapted to suit a variety of needs. Our OEM clients include manufacturers of CNC machines, medical equipment, security systems, scientific & analytical equipment, defense applications, telecom cell sites.

Product Range

At TSi Power we manufacture various power conditioning equipment based on TSi-USA’s IGBT Pulse Width Modulation (PWM) Technology. Our present range includes:

VRp Series Power Line Conditioners :
VRp Series Static Voltage Regulators :

We also provide other related products like :

Our Team

We function with a professional team of shop-floor engineers, technicians, sales & application engineers and a lean staff. The company is managed by an operational team working together to assist clients across the globe.

The Board of Directors of our company includes :

All day-to-day operations are looked after by following key persons :

Rajesh N Pande : The key promoter & Managing Director of the Indian company. He is a 1976 graduate from IIT Kanpur having over 3 decades of experience in Projects, Application Engineering, Sales & Marketing, including last 15 years in Power Conditioning Industry. he provides strategic guidance to the operation team & oversees all aspect of the Indian Company.

Peter Nystrom : Co-promoter & President of TSI Power Corporation, USA, who migrated to USA after completion of engineering from Sweden. He possess over 3 decades of experience in Power Conversion and Power Conditioning industry and has worked as consultant to reputed telecom companies and written many articles on power quality in emerging markets. He is the nodal point for channelizing the technology transfer from TSi Power - USA & provides continued guidance to the Indian company.

Ashish Mittal : Vice President in-charge of operations of Indian company. He has a technical qualification in electrical engineering followed by an MBA. He possesses over a decade of experience in sales, marketing, application & product development in power conditioning industry. He handles the day-to-day operations & directly oversees exports development, vendor development & product development functions.

Automatic Voltage Regulators

Will the VRp voltage regulator correct a distorted waveform?

No. Current to the load passes through the phase conductor. Regulation current is taken from the incoming phase. The voltage correction is +-20%. Only a dual conversion voltage regulator would be able to provide waveform correction.

Can the three-phase VRp receive power from a delta source?

No, VRp must receive power from a wye source with three phase conductors plus neutral

Does VRp have a bypass switch?

Yes, VRp has an automatic bypass switch.

What does the automatic bypass switch do?

If VRp's control PCB fails, it will automatically switch to bypass, allowing unregulated voltage to power the connected load. This feature prevents an unscheduled shutdown of the connected equipment.

What happens if the VRp control circuit board fails?

All LEDs will switch off. The load current will pass unregulated to the connected load. In some cases, the VRp main circuit breaker needs resetting. Contact TSi Power for an RMA or replacement control circuit board.

Is VRp available with under - and over-voltage cut off?

VRp Series Static Voltage Regulators do not have OVP/UVP, but it can be offered as an option.

VRp Series Power Line Conditioners come with in-built OVP/UVP protection.

Isolation Line Conditioners

What is leakage current to ground and why is it possibly harmful?

Ground leakage current occurs when wire insulation is damaged or becomes frayed with age. Then, small amounts of a current can flow into the grounded metal cabinet or chassis. The maximum allowed ground leakage current is a few milliamps (thousands of an amp). A GFCI (ground fault circuit interrupter) can be used to detect higher-than-normal ground leakage current and turn off the circuit, which is the reason for mandatory GFCI-protection of AC sockets near earth ground, bathtubs or showers. By detecting the current through a person's body into the ground and then tripping the circuit, GFCI can prevent electrocution when a person accidentally comes in contact with a live AC source.

Under UL 60950-1 (the standard for safety of information technology equipment including electrical business equipment), the maximum allowed ground leakage current per each computer or office equipment is a few milliamps.

However, when there are hundreds computers, IT equipment and electrical business equipment in each floor of a high-rise building, each floor can produce a combined leakage current of one or two amps. When there are 10, 20 or 30 floors, total leakage current for the building can exceed 10, 20 or even 30 amps.

The presence of constant leakage current violates the NEC (National Electrical Code), which allows momentary current through earth ground wire only for short-circuit protection and surge current when TVSS (transient voltage suppression system) is activated due to transients or lightning strikes.

Another consideration is differences in ground potential between floors. For example, the earth ground wire on the 20th floor may read several volts higher than the earth ground wire voltage on the ground floor. This may cause equipment malfunction and/or damage when data communication wires are connected between ground floor equipment and equipment at upper floors.

Therefore, minimizing ground leakage current in a large building is very important for ensuring personnel safety, equipment functionality and equipment protection from stray voltages and ground loop currents.

What are the key benefits provided by ILC?

By using a low leakage isolation transformer, typical ground leakage current can be reduced to about 100 micro amps (which is typical) even if the ILC is powering a load with high-leakage current of several milliamps or even more. Therefore, using an ILC can reduce ground leakage current by 10:1 or even 100:1.

If multiple ILC units are used to power all the "leaky" IT equipment inside a high-rise building, then reducing ground leakage current by more than 90% will solve most of the problems associated with ground potential differences between floors. An ILC is designated as a "Separately Derived Power Source" under National Electrical Code 250-5D and recommended by US federal government's FIPS Publication 94 for elimination of problems caused by presence of neutral voltage, noise and transient voltages on the neutral line (common mode noise and transients).


What is a GFCI and where is it used?

A GFCI (ground fault circuit interrupter) is used to detect higher-than normal-ground leakage current and turn off the circuit once it does. Under the NEC (National Electrical Code), GFCI protection of AC sockets near earth ground, bathtubs or showers is mandatory. By detecting the current through a person's body into the ground and then turning off the AC circuit, GFCI can prevent electrocution when a person accidentally comes in contact with a live AC source.

Uninterruptible Power Systems

What is the difference between a gel and an AGM battery?

A gel battery is powered by a gelled electrolyte in a sealed container, rated non-spillable by the IATA (Air Transport Association) and the DOT (Department of Transportation), making it possible to ship it by air without restrictions. A gel battery is rated for operation at over -40 to +600 C, making it an ideal battery for outdoor use. AGM (Absorbed Glass Mat) batteries run off of electrolytes absorbed in sponge-like mats between plates. They are typically rated for use between 0 to +400 C, which is not suitable for outdoor conditions.

Why is your outdoor UPS rated at 450 C when some other manufacturers products are rated at 600 C?

TSi Power's outdoor UPS products are rated typically at over -20 to +450 C outside air temperature. Most use a thermostat-controlled fan to keep the temperature inside the cabinet no more than +500 C, which is well below the maximum operating temperature limit of the gel batteries inside the cabinet.

Why don't you provide outdoor UPS systems in NEMA 4 or NEMA 4X cabinets?

The worst-case scenario for the VRLA (valve-regulated lead acid) batteries that are most commonly used in outdoor UPS units is when a battery charger's regulator circuit fails and it is no longer able to regulate charging voltage. When that happens, oxygen and hydrogen gas production increases dramatically, which opens the safety valve and emits a substantial amount of oxygen and hydrogen. This scenario is also known as "battery out-gassing". When a sealed NEMA 4 or NEMA 4X cabinet is used, the trapped mixture of oxygen and hydrogen can explode when a spark ignites the gases. This creates a highly dangerous situation with flying metal shrapnel that can cause severe personnel injury. Because of this, free-breathing NEMA 3R is the correct cabinet to use whenever VRLA batteries are housed inside an outdoor UPS cabinet.

Which is the better choice, AC output UPS or DC output UPS?

It depends on the output capacity in watts. If the load is less than 200 watts, DC output UPS systems are about half the size, weight and cost substantially less than an AC output UPS. This is because an expensive DC to AC inverter circuit can be eliminated and there is no power conversion loss associated with DC to AC inversion circuit, resulting in substantial battery size reduction as well.

However, if the load is more than 400 watts, then the size/weight/cost penalty of AC output UPS is offset by the need for expensive, continuous-duty high powered AC to DC converter in a high capacity DC output UPS. If the UPS must power a load of 800 watts or more, AC output UPS is by far the smaller, lighter, more energy and cost effective solution.

Can an outdoor UPS be powered by street light circuit which is ON for only eight hours per day?

Yes. An extra-large battery bank will be required to power the load for a minimum of 24 hours, with expected battery lifetime of about 1.5 years (note: use of a 36- to 48-hour rated battery is strongly recommended if a battery lifetime of three or four years is desired). Also, this application needs a temperature-compensated, high-capacity battery charger which will ensure full charge of the battery after eight hours of overnight charging.

DC to AC Power Inverters

Do I need a sine wave inverter?

That depends on the connected load. Light-duty applications such as coffee pots and light bulbs can be powered by a step wave or square wave inverter. Non-sine wave inverters generate harmonics up to 70% - the harmonics generate heat in the connected load. However, for any critical application a sine wave inverter is a must.

Can I run air conditioners, electric motors or power tools with an inverter?

Most likely not, unless the inverter manufacturer specifically states that their inverter is designed to be compatible with such loads.

Are TSi Power's new inverters protected against reversed polarity?

Yes. The inverter will not start if the polarity is incorrect. Once the wiring is corrected, it will operate normally.

Are TSi Power's inverters protected against overload and short circuit currents?

Yes, our inverters are designed to be protected against overload and accidental short circuit. The output can be shorted and will recover once the short circuit is removed.

Automatic Transfer Switches ARM and ATS

Can I use TSi Power's ARM for out-of-phase power sources?

No, the correct product for switching out-of-phase power sources is the ATS.

What is the switch-over time for ARM-1000?

The typical switch-over time is 10 ms.

What is the switch-over time for TSi Power's ATS-1000?

The typical switch over time is 20 ms.

I am concerned that 20 ms is too slow for my critical load. What do you recommend?

Most loads with switch-mode power supplies can handle 20 ms. There are some loads that don't. We recommend testing it with the ATS-1000 before making a decision.


How long is a battery expected to last in an outdoor environment?

Battery life is highly dependent on the operating temperature. The higher the operating temperature of the battery, the shorter the expected battery lifetime. If the average air temperature is about +400 C (operated at year-round high temperature, such as in the tropics), the expected battery lifetime is about two years. If the average air temperature is around +200 C (moderate temperature found in most areas), the expected battery life is about four years. In cold climates (near 00 C year-round), the expected battery lifetime is about six years.

Another major factor that determines expected battery lifetime is the depth of discharge and frequency of charge and discharge cycle.

For example, if a battery is fully discharged and recharged on a daily basis (such as an outdoor UPS system powered by street light circuit that is ON for eight hours and OFF for 16 hours on a daily basis), then battery lifetime is 350 full charge/discharge cycles or about one year.

However, if a battery is discharged to only 50% level then recharged to 100% level on a daily basis (so that only half of the stored energy in the battery is discharged and recharged on a daily basis), the same battery lifetime is 1,000 charge/discharge cycles, or about three years.

If only 25% of the stored energy in the battery is discharged then recharged to 100% level on a daily basis, then the expected battery lifetime is 2,000 charge/discharge cycles, or about six years, assuming that the operating temperature condition is also near 00 C at which maximum battery lifetime can be expected.

Enclosures and Mounting Methods

What security devices do you offer for your cabinets?

Besides the standard hex bolts that secure the covers or doors shut, TSi Power can provide the following fasteners and tools:

All of the fasteners are stainless steel except for a few specialized locks that are die-cast zinc or plastic.

What type of specific mounting methods do you recommend to mount your products?



What is the best material for an outdoor enclosure?

It depends: If weight is a problem or for pole mounting, we use powder-coated aluminum with welded construction. If corrosion is a problem, such as near the ocean, we use powder-coated aluminum or passivated stainless steel with welded construction. For general applications indoors or outdoors, we use powder-coated galvanealed steel with riveted or bolted construction.

Custom Solutions

Does TSi Power develop custom products for low-volume requirements?

Yes. We offer both custom solutions and customizable products for a variety of situations. Please fill out the Customer Requirements Form and contact us to discuss your needs

Does TSi Power require non-recurring engineering charges (NRE)?

It depends on the project and the size of the potential order. Because most of the custom products that we quote use parts from our standard toolbox of designs, we typically do not need to charge for NRE. TSi Power will quote NRE as a separate item if the project requires an extensive commitment of internal or external resources, such as CE, UL, CSA, UL or FCC safety, conducted & radiated EMI/RFI emissions testing and listing/marking services.

Safety and EMC

Is UL the only safety listing agency?

No. You can obtain a safety listing from one of four nationally recognized testing laboratories (NRTL) in North America:

Is an NRTL safety listing required by law?

Generally no, but some states and cities in the US require NRTL safety listing. In Canada, safety listing is mandatory.

Is the NRTL safety listing acceptable in Canada?

Yes, but the label must read cULus or cETLus.

Are all TSi Power products NRTL-safety listed?

A number of standard TSi Power products are cETLus listed. Low-volume and custom products are generally not listed unless required by the customer.

Is an unlisted TSi Power product safe?

Yes, they are very safe to use. TSi Power designs its products to meet applicable safety standards.

What is the safety listing for Europe called?


Is CE required by law?

Yes, it is required by all European Union countries and some other European countries.

What is the process for obtaining a CE listing?

CE is based on self-certification. The manufacturer is responsible for determining the applicable standards and for testing the product to ensure compliance. The manufacturer then issues a Certificate of Conformity. The manufacturer is now free to apply the CE label.

In the US, I understand that the NRTL must evaluate and test the product and after approval, must conduct quarterly safety inspections. How can an EU consumer know that products are safe when manufacturers do their own conformity assessment?

EU authorities believe that competitors police each other. If a company or consumer thinks a product is unsafe, they can ask the authorities to investigate and test a product; if found unsafe, the manufacturer/importer is required to correct the problems or take the product off the market.

What is TSi Power's procedure for obtaining a NRTL (Nationally Recognized Testing Laboratory) safety listing?

We design the product to the applicable standards and work with Intertek/ETL to prepare a documentation package with all safety critical components. Intertek then sends a test engineer to our factory to conduct the safety tests required by the applicable standard. If all the documentation and tests meet Intertek's standards, they will issue an Authorization to Mark (ATM).

How long does the process take?

Typically 60 to 90 days.

Can this be expedited?

Sometimes yes, depending on a number of factors. If you need an expedited NRTL safety listed, we'll discuss the options with you.

How many safety standards exist?

There are many different standards. It is up to the manufacturer to determine the standard that applies to a particular product. These standards can be purchased from Underwriters Laboratories.

Are North American and EU standards harmonized in any way?

The most important standards are now harmonized but there are some variations to satisfy national requirements.

Is the safety label a guarantee of product performance and good quality?

No, it is a guarantee that a product has been investigated and found in compliance with an applicable safety standard. It also means that quarterly compliance inspections of the manufacturer are carried out by a field inspector.

How do I verify that a product is listed?

The various NRTLs(Nationally Recognized Testing Laboratories) maintain websites where a product safety listing can be verified online.

Surge Protection Devices (SPDs)

What are the various types of surge protection devices and where should they be used?

UL 1449, 3rd edition (effective September, 2009) provides following surge protector classifications:

Permanently Connected (PC)
Direct Plug-In (DPI)
Cord Connected (CC)

Type 1 - Permanently connected (PC) between service transformer and line side

Type 2 - Permanently connected on load side of service disconnect

Type 3 - Point of Use: minimum 10 meters from service panel

Type 4 - Component assemblies for SPD (surge protection device) or other non-SPD applications such as appliances

Type 5 - Discrete components for SPD or other non-SPD applications such as appliances

Application Areas

We at TSi Elecpower Limited offer a wide range of Power Line Conditioners and Voltage Regulators. We value our suppliers and have developed long-term relationships in order to ensure best quality and lead time for components. Here, we directly export our products to end users, systems integrators and value added resellers. This enhances our communication with actual customer, ensuring that they get the right solution for their demands.


Unmanned telecom sites & far-flung communication stations need stable power supply to function efficiently & to save on expensive DG running. Our PWM-based automatic voltage regulators are available to address communication site & cell site base station problems with unstable mains voltage.

CNC, Robotics, Automation

CNC, Robotics, Automation

By far the largest user segment of our power conditioning products is CNC machines, Robotics & Automation applications. In developing economies with inadequate power infrastructure, such as India, operating high end electronic machines is a challenge because conventional methods of voltage stabilization fail to deliver. Our VRp series line conditioners enable high up - time for mission critical CNC machinery & production equipment.

Textile Looms

Textile Looms

Modern day textile looms use high end electronics & fail under poor power quality. Our VRp-Precision Line Conditioner comes as a tailor made accessory to efficiently run such looms even with poor quality of input power. Several OEM's & textile loom units vouch by our technology & do not settle for anything less.

Hospitals, Analytical and Scientific Laboratories

Hospitals, Analytical and Scientific Laboratories

We offer VRp PWM Voltage Regulators & ILC Isolation Line Conditioners, including customized solutions. These products are designed to protect laboratory equipment, gas chromatographs, mass spectrometers, imaging, patient support, as well as diagnostic equipment.

Building Systems, Surveillance & IT

Building Systems, Surveillance & IT

We offer VRp PWM voltage regulators including customized solutions for high end comfort to people living in residential villas or working in top grade IT companies, offices & showrooms. They will be assured of high quality power to smoothly run their high-end equipment, such as home theatres, music systems, air conditioners, computers, servers, special purpose lighting etc.


Let Us Know Your Requirement


    We will contact you soon !

    Ashish Mittal

    (Vice President)

    TSi Power (P) Limited

    Waghodia, Vadodara, Gujarat, India

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