DV-Power - Nemel Kenya Limited, Energy Consultants

Emma Wanjiru - Director

Eng. Emma Wanjiru has a wealth of experience in energy matters. She is a practicing Electrical Consultant as well as a Contractor. She has a Class A1 license in Electrical installations and class A3 license in solar installations.

Eng. Emma Wanjiru is a former chairperson of Energy Regulatory Board (ERC). ERC is the Commission that regulates the operations of power utilities in Kenya. Besides issuing power generation licences the body sets power both bulk and retail energy tariffs and approves power purchase agreements.

Emma served as a director of Rural Electrification Authority. Emma prides herself for being the first woman to be a Registered Consulting Engineer. She holds a Bachelor of Science in Electrical Engineering and Masters of Business Management both from the University of Nairobi. She is currently pursuing M. SC in Energy at the same university.

Joel Kiilu - Director

Eng. Kiilu is a former Managing Director of the Kenya Electricity Transmission Company Limited (Ketraco).

Eng. Joel Kiilu is a registered Electrical Engineer. He holds a Masters Degree in Business Administration (MBA) from the University of Nairobi and a Bachelor of Science (BSc.) degree in Electrical Engineering from the same University. He is currently pursuing PHD in business Leadership at Management University of Africa.

Eng. Kiilu has vast knowledge of the Power industrial. Having been the Chief Manager, Energy Transmission in Kenya Power and Lighting where he was in charge high voltage system design, construction, operations and maintenance.

He was in charge of power purchase agreements and energy dispatch, SCADA and Energy Management System. Eng. Kiilu participated in drafting and negotiating Power Purchase Agreements between:

Kenya Power and Lighting Company Ltd and Kenya Electricity Generation Company Ltd (Thermal, Geothermal and Hydro power).
Kenya Power and Lighting Company Ltd and Rabai Power Company Ltd ( Thermal power).
Kenya Power and Lighting Company Ltd and Mumias Sugar Company ltd (Thermal power).

As the Chief Executive Officer of Ketraco, he was responsible for the establishment of the organization, including the necessary structures, policies and procedures and overall operation of the organization. Under his leadership the company grew, in 6 years, from an asset base of US$80Million to over US$600Million.

Eng. Kiilu is a member of the Institution of Engineers of Kenya (MIEK), and the Institution of Electrical and Electronic Engineers (MIEEE).

MESSKO BeTech Temperature Indicators

Oil and winding thermometers with BeTech bellows technology
Extremely durable and reliable
No readjustment or recalibration ever needed
Contacts individually adjustable
Compensation of ambient temperature
Laminated safety glass viewing glass with built-in UV filter
These temperature indicators include:
- Oil Temperature Indicator (OTI)
- Winding Temperature Indicator (WTI)
- Dry-type Temperature Indicator (DTI)

PD ALARM

The PD Alarm is an asset mounted device for indicating the presence of partial discharge in high voltage switchgear, ring main units (RMUs) and dry type transformers. Designed for use in small substations, the instrument can activate local and remote alarms in addition to local indication.

Key Features

Display– Ultrasonic and TEV level displayed in dB
Alarms– Current ‘live’ alarms and historical alarms
TEV PD Detection– Measurement of electrical transients generated by internal PD
Ultrasonic PD Detection– 3 independent ultrasonic channels detecting surface PD
Integrated Noise Detection– Algorithm helps avoid ‘False Alarms’
Simple to Install– No wiring required between PD detector and central hub

MESSKO MTraB Dehydrating Breather

Zero-maintenance
Prevents the ingress of moisture into the conservator of transformers and tap changers
Performs condition-based sensor-controlled regeneration of silica
Self-learning
Has a filter system – stainless steel filter at the bottom
Has an anti-condensation heater to prevent low temperatures
Has a replaceable moisture/temperature sensor

MESSKO MSafe Buchholz relay

Installed between the tank and oil conservator to react to faults which occur inside the transformer and detect early damages which are not visible
Activated by gas accumulation, liquid loss and spontaneous fast-moving liquid flow
Has a test button for the function test of its functionalities with a reset function
Remote testing can be performed through the connection of a pneumatic line that enables triggering of the MSafe
Has a mounted ball valve with compression fitting that serves as ventilation of the housing after the filling of the conservator
Has a gas sampling device to collect the Buchholz gases for the detection of hydrogen (indication of high energy incident) and carbon monoxide (indication for the aging of the insulation material)

MESSKO MPreC Pressure Relief Device

Has a protection cover with defined oil flow (with optional flange connections) to protect against injuries with hot oil
Has a special inlaying gasket design to protect against leakage
Has a defined stroke (4mm) up to force activation of switching contacts
Has a self-locking aluminium signal pin with a notch to prevent from backslide
Has KTL coated springs to prevent erroneous releases/false tripping and fatigue failure due to corrosion
Opening time within 2ms and re-closure time within 70ms

TAPCON Voltage Regulator

Used for standard regulation tasks as well as complex applications requiring individual solutions
Comes with various housing shapes for the different installation situations encountered in the substation
Equipped with a range of extensive communication solutions which guarantee exceedingly high flexibility during utilization and easy handling at the same time

TAPMOTION Drives

The motor-drive units of the TAPMOTION series are used to reliably drive on-load tap changers and off-circuit tap changers in regulating transformers.
Equipped with high-end communication functions

Oil Filter Unit OF 100

When using the OILTAP on-load tap changers under adverse conditions, the OF 100 oil filter is recommended to clean and dry the oil in the tap changer and therefore greatly extend the tap changer’s maintenance intervals.

DEETAP Off-Circuit Tap Changer

Used for setting the voltage of oil-immersed transformers
The required winding taps must be set with the transformer completely switched off

OILTAP V On-load Tap Changer

Conventional (oil) switching technology
Applications – network or generator operation, electric arc furnaces, HVDC, electrolysis, inverters, phase shifters ad auto transformers

ECOTAP VPD On-load Tap Changer

Enables the regulation of distribution network transformers as well as industrial, wind-park and photovoltaic applications
Vacuum switching technology
Maintenance-free and very reliable
Can be used in any transformer regardless of manufacturer
Very compact such that it does not alter a transformer’s dimensions

VACUTAP RMV II On-load Tap Changer

Reactor-type tap changer with vacuum switching technology
Maintenance-free up to 500,000 tap-change operations with no time component
Quick switching times
Internal oil heating system for use in arctic conditions

On-load Tap Changer VACUTAP VR

High-speed resistor-type tap changer with vacuum switching technology
Maintenance only required after 300,000 to 600,000 tap-change operations
Dramatically reduced operating costs over total usage period
Increased transformer availability
No oil carbonization
No contact changes
No oil filter unit
Ideal for HVDC and industrial applications

ASM-REMOTE

The ASM-Remote is a PD monitoring system designed for application on critical EHV and distributed assets, where the monitoring point could be many hundreds of meters or tens of kilometers apart. Fiber linked monitoring points transmit PD data over long distances to the main monitoring unit, which then processes the data and displays the results on a secure customer web front end.

Benefits of ASM-Remote

On-line PD Detection– The ASM-Remote uses PD sensors that couple to the HV network and equipment on-line and non-intrusively, and so no disconnection of the circuits is required.
Remotely Accessible– Using any of a wide range of communication protocols, the ASM-Remote automatically downloads data to a central database; from where it can be viewed on a powerful analysis website.
Long Distance Monitoring– The key design of the ASM-Remote system is to allow for cost effective remote monitoring of assets which are usually inaccessible. Examples include joints along an EHV cable or cables terminations in wind farm arrays.

Web Based Analysis

A client specific secure website is used for the review and analysis of individual asset conditions. This powerful tool allows users to drill down from a basic condition overview to highly detailed data, including sampled PD wave shapes when expert interpretation is required.

Sensitive PD detection in high noise environments
Local alarms and email alarms
Automated generation of Criticality league table
Supports HFCT, TEV, AE and UHF PD sensors
Trend Analysis and Reporting

ASM-PORTABLE

The ASM-P is a Portable PD Monitor for cables, switchgear and other high voltage assets. The ASM-P can be configured with up to 32 PD sensor channels. If excessive discharge is detected, the ASM-P raises an alarm that can be configured either locally or by email. This enables the long-term assessment of plant conditions to be carried out quickly and easily, from any remote computer.

Web Based Data Analysis

Partial discharge data is automatically collected from the ASM-P and is stored on a central database and is hosted by IPEC. Customers have direct password-protected access to this data via the Internet, allowing them to browse the data and analyse plant condition from any PC.

Condition information presented like this can be used for targeting scheduled maintenance work before the failure happens, improving network reliability and prioritising asset replacement.

Based on the magnitude of activity levels recorded and the trend in that activity, a ‘League Table’ is automatically generated once every 24 hours. This table gives a clear and quantitative representation of the condition of monitored high voltage assets at any given moment.

CMCE Sertec 120

For use in buildings, large complexes, mining, boats, and electric stations.

Weight: 8.370 kilograms (Gross)
Measurements: ɸ24.17cm × 36.72cm
Packaging: Galvanized Metallic Material
Height: 41cm
Diameter: 28cm

CMCE GRAPHENE

Developed for special applications and military use due to the great conductivity, high strength and lightweight characteristics of graphene.

CMCE SERTEC MARINE – DIAMOND

With its greater deionizing power, it is developed for maximum protection in yachts, cruises, cargo ships and military ships

Weight: 6.170 kilograms (Gross)
Measurements: ɸ24.17cm × 36.72cm
Packaging: Galvanized Metallic Material
Height: 41cm
Diameter: 28cm

CMCE SERTEC MARINE – PLATINUM

With its greater deionizing power, it is used in fishing or expedition boats of medium size, catamarans and small yachts.

Weight: 2.750 kilograms (Gross)
Measurements: ɸ24.17cm × 36.72cm
Packaging: Galvanized Metallic Material
Height: 21cm
Diameter: 20cm

CMCE SERTEC MARINE – GOLD

For use in small boats, sail boats, marine buoys

Weight: 1.062 kilograms (Gross)
Measurements: ɸ24.17cm × 36.72cm
Packaging: Galvanized Metallic Material
Height: 21cm
Diameter: 20cm

CMCE-AT 120

Developed for installations in high temperature environments, for example, chimneys, industries, etc. Supports up to 400⁰C.

Weight: 8.370 kilograms (Gross)
Measurements: ɸ24.17cm × 36.72cm
Packaging: Galvanized Metallic Material
Height: 41cm
Diameter: 28cm

CMCE – HIGH VIBRATION

Developed with the same characteristics of CMCE 120, but with a special design to avoid the falling of the equipment, especially for derricks.

Weight: 11.170 kilograms (Gross)
Measurements: ɸ24.17cm × 36.72cm
Packaging: Galvanized Metallic Material
Height: 41cm
Diameter: 28cm

CMCE BLACK 120

Same characteristics as the CMCE 120, but with a dark matt color design, to avoid disturbance to the environmental visual.

Weight: 8.370 kilograms (Gross)
Measurements: ɸ24.17cm × 36.72cm
Packaging: Galvanized Metallic Material
Height: 41cm
Diameter: 28cm

CMCE NANO

Developed for small deposits, telecommunications towers, medium and high voltage power lines, traffic lights, small radars, road cameras and garitas.

Protection radius: 25m
Weight: 980 grams (Gross)
Measurements: 17cm Height × 10 cm diameter
Packaging: Galvanized Metallic Material

CMCE HIGH RESISTANCE

Designed for highly corrosive environments, since it is a steel with high resistance to corrosion, given that the chromium or other alloying metals it contains, have great affinity for oxygen and react with it forming a passivating layer, thus avoiding corrosion of iron.
Protection radius: 100m
Weight: 20 kilograms (Gross)
Measurements: ɸ24.17cm × 36.72cm

CMCE HOME

Developed to protect all types of structures on land, residences, small buildings and warehouses.
Protection radius: 55m
Weight: 2.460 kilograms (Gross)
Measurements: 24cm Height × 15.5 cm diameter
Packaging: Galvanized Metallic Material

SILUETA

CME-UL

UHF Sensor

IPEC’s UHF (Ultra High Frequency) sensors is used to detect PD in EHV cable terminations, GIS (Gas Insulated Switchgear), GIL (Gas Insulated transmission Lines) & GIT (Gas Insulated Transformers). The sensors pick up signals in the UHF range (200MHz-2.5GHz) and are mounted against the insulating barrier spacers that separate components of the HV asset. The sensors work with multiple IPEC monitoring systems.

Sensors are installed differently depending on the asset manufacturer and model and accessibility to insulating sections, gaskets, UHF windows, and accessibility. Please contact IPEC for specific applications

PD-SGS

PD-SGS is a dual transducer PD detector for Switchgear. The instrument detects TEV signals generated by internal discharge as well as acoustic discharge generated by surface tracking or corona.

Key Features

Measurement of TEV signals generated by internal PD
Ultrasonic detection of surface PD activity
Integrated Noise Detection Algorithm helps avoid ‘False Positives’
Level Mode and Trend Mode
Audible output through headphones or built in speaker

TEV PD Detection

Partial Discharge activity inside metal clad high voltage plant induces small voltage impulses called Transient Earth Voltages on the surface of the metal panels. TEVs travel around the surface to the outside of the switchgear, where they can be picked up externally using the PD-SGS detector.

Ultrasonic PD Detection

Defects on the surface of high voltage insulators are prone to a phenomenon known as surface tracking. Tracking causes carbon deposits that build up over time, ultimately leading to flashover and insulation failure. The PD-SGS is highly sensitive to the ultrasonic emissions produced by tracking and enable the onset to be detected before insulation failure.

PD-SG1

PD-SG1 is used to detect, verify and locate PD activity in switchgear. The unit offers both TEV detection for internal discharge and ultrasonic detection for surface tracking and corona.

Key Features

Ultrasonic detection of surface PD activity. Displayed on the LCD screen as dB reading, as well as audible signals through headphones.
Measurement of TEV signals generated by internal PD
PRPD Mode for viewing PD pattern in power cycle, allowing for the recognition of noise
Precedence Mode for location of PD within the assets under test

PD Detection Partial Discharge activity inside metal clad high voltage plant induces small voltage impulses TEV (Transient Earth Voltages) on the surface of the metal cladding. TEVs travel around the cladding surface to the outside of the switchgear panel where they can be picked up externally using CC-TEV transducers.

The PD-SG1 has three modes: Level Mode, used to detect presence of both TEV and ultrasonic activity; Cycle Mode, Phase Resolved Partial Discharge Display (PRPD) enables the user to verify PD activity is genuine and not from electrical noise interference before taking further remedial action; Precedence Mode, dual sensor precedence allows users to pin-point the source of PD activity.

PD Detector

Key Features

Data synchronisation to central server and sync with any other PD Detector system
Log and trend PD activity against particular assets
Automatic data integration with SAP (upon request)
Integrated Noise Detection Algorithm helps avoid ‘False Positives’

TEV PD Detection

Partial Discharge activity inside metal clad high voltage plant induces small voltage impulses called Transient Earth Voltages on the surface of the metal panels. TEVs travel around the surface to the outside of the switchgear, where they can be picked up externally using the PD Detector.

Ultrasonic PD Detection

Defects on the surface of high voltage insulators are prone to a phenomenon known as surface tracking. Tracking causes carbon deposits that build up over time, ultimately leading to flashover and insulation failure. The PD Detector is highly sensitive to the ultrasonic emissions produced by tracking and enable the onset to be detected before insulation failure.

Parabolic Reflector

Parabolic Reflector is an ultrasonic sensor for use when detecting partial discharge activity on exposed insulating surfaces. The reflector increases the sensitivity of the sensor allowing detection to be effective at up to 25m. It is commonly used in outdoor switchyards to detect surface discharge on string and post insulators, sealing ends and other exposed equipment.

Use of Parabolic Reflector

With the Parabolic Reflector connected to the PD-SGS, the reflector should be pointed at the HV equipment being inspected.

Look through the view finder with both eyes open and line up the red dot visible through the view finder with the centre of the inspection area.

The PD-SGS instrument should be operated in AE Mode (See PD-SGS Operation Manual) and it will register a dB reading on the user display. It will also generate an audible output according to the level of activity detected.

It is recommended that when using the Parabolic Reflector out of doors, the head phones are worn in order to minimise interference from outside noise sources.

Owing to the nature of acoustic PD detection and natural variations caused by environmental conditions, it is recommended that PD levels identified are appraised according to their relative values when compared with other similar plant and not in absolute terms.

Maintenance and Servicing

If necessary, clean the equipment with a damp cloth. Do not use solvents as this may damage the surface.
After use, the equipment should be disassembled and stowed in the carrying case.
Replace low batteries immediately with a new cell of the type CR2032 3V. The battery box is situated on the lower surface of the red dot sight.

HFCT 100 PD Sensor

HFCT 100 PD Sensor is a high frequency current transformer specifically designed for the passive detection of PD in HV and EHV cable circuits.

Partial Discharge activity in solid high voltage insulation induces small high frequency currents in the earth conductor of the electrical system. These impulses travel along the equipment earth to the substation earth. Using a high frequency current transformer, they can be detected as they pass through the CT.

The HFCT100 has a split core ferrite to allow retrospective fitting to earth straps without the need for disconnection. Its larger internal diameter makes it ideal for HV and EHV applications. The durable body has a hinge and a quick release latch making use quick and easy. The CT is constructed with an aluminum body to provide RF shielding and improved performance in noisy environments.

This transducer is ideal for all core, earth and neutral PD monitoring applications.

HFCT 48 PD Sensor

HFCT 48 PD Sensor is a high frequency transducer designed specifically for picking up partial discharge signals.

Partial discharge activity in solid high voltage insulation induces small high frequency currents in the earth conductor of the electrical system. These impulses travel along the equipment earth to the substation earth. Using a high frequency current transformer, they can be detected as they pass through the CT.

The HFCT48 has a split core ferrite to allow retrospective fitting to earth straps without the need for disconnection. The durable body has a hinge and a quick release latch making use quick and easy. The CT is constructed with an aluminum body to provide RF shielding and improved performance in noisy environments.

This transducer is ideal for all core, earth and neutral PD monitoring applications.

CC-TEV PD Sensor

Transient Earth Voltage

Partial Discharge activity inside metal clad high voltage plant induces small voltage impulses (called Transient Earth Voltages) on the surface of the metal cladding. TEV’s travel around the cladding surface to the outside of the switchgear panel where they can be picked up externally using capacitively coupled transducers (see picture above).

Capacitive Coupler

The Capacitive Coupler sensor detects TEVs as they pass over the cladding of the high voltage plant. The very fast output signals are recorded by the IPEC ASM Monitor. The sensor is enclosed in a durable silicon body for added protection. The body has powerful magnets embedded within it for mechanical coupling to steel enclosures.

Embedded Sensing

Depending on the switchgear type, more accurate signals can be obtained by embedding the sensors inside the switchgear to be monitored. Note: The sensor is applicable to multiple locations outside / inside switchgear panels, the exact ideal positioning depends upon the switchgear type.

AA Ultrasonic PD Sensor

Surface Discharge

Surface tracking and corona in air can seriously damage high voltage insulating surfaces in a way that will ultimately lead to flashover and complete failure of the insulator.

This discharge activity creates acoustic emission that can be detected using an ultrasonic sensor. The magnitude of the acoustic emission is indicative of the degree and severity of discharge activity.

Acoustic Probe

The acoustic probe is designed for use on air insulated terminations or other HV components where there is a clear sound path between the electrically stressed insulation and the probe. The sensor is extremely sensitive and can detect activity below 10pC. The probe has a magnetic base to allow mechanical coupling to steel enclosures and a swivel head so the detecting sensor can be aimed directly at the HV point.

Embedded Sensing

In many applications, there is no external line of sight to the HV points. The sensor can be safely embedded inside the HV equipment to give optimal detection capability.

ASM

ASM is a Partial Discharge monitor for permanent testing of cables and switchgear. The latest ASM model has been upgraded offering fast data acquisition, and analysis. IPEC’s PD Monitoring system technology is installed in more substations than any other online PD monitoring system.

The Benefits

Online PD detection – The ASM uses PD sensors that couple to the HV network and equipment non-intrusively and online such that no disconnection of the circuits is required
Fully Customisable – The monitor is enclosed in a 19” cabinet allowing for customisable options such as; cooling, UPS, internal power baton and integration with existing equipment
Remotely Accessible – Using any of a wide range of communication protocols, the ASM automatically downloads to a central database from where it can be viewed on the analysis website from any smart device

Web Based Analysis

iSM is a customer specific secure website is used for review and analysis of individual asset condition. This powerful tool allows users to drill down from a basic condition overview to highly detailed data including sampled PD wave shapes.

Sensitive PD detection in high noise environments
Local alarms plus email and SMS alarms
Automated generation of criticality league table
Supports HFCT, TEV and AE PD sensors
Trend analysis and reporting

TWA40D

• The Tap Changer & Winding Analyzer TWA40D is designed for six-winding resistance measurement and simultaneous three-phase on-load tap changer analysis of both the primary and the secondary transformer windings. Additional testing mode, Quick YN, is enabled by the DV-Win software. In this mode, it is possible to measure the resistances of three transformer windings in the YN configuration simultaneously. It is also possible to test the resistances of all tap changer positions of all three phases in a single pass through the tap changer positions.

TWA25A

• The Three-Phase Winding Ohmmeter TWA25A is designed for six-winding resistance measurement of both the primary and the secondary transformer windings. This is performed with a one single-step cable setup, with test currents of up to 25 A. Each transformer configuration has a special measurement algorithm which is optimized for the fast stabilization of test results.

TRT 63 A

• Test voltages from 1 V AC up to 250 V AC
• Ratio range 0,8 – 50 000
• The best ratio accuracy of 0,03%
• Built-in tap changer control unit
• Built-in USB flash drive
• True three-phase and single-phase test
• Automatic vector group detection
• Detailed analysis of test results using DV-Win software
• Pre-programming test-plans deploying DV-Win software
• Lightweight – only 9 kg

TRT – 400

• Test voltages from 1 V AC up to 430 V AC
• Ratio range 0,8 – 50 000
• The best ratio accuracy of 0,03%
• Built-in tap changer control unit
• Built-in USB flash drive
• True three-phase and single-phase test voltages
• Automatic vector group detection
• Detailed analysis of test results
• Pre-programming test templates
• Lightweight – only 9 kg

SAT 40 A

• Powerful – up to 40 A
• Output voltage is selectable from 10 V to 300 V DC or from 10 V to 250 V AC.
• The set is equipped with thermal and over current protection. SAT40A is easy to use and has accessory cable-set with touch-proof contacts.
• The SAT40A has very high ability to cancel electrostatic and electromagnetic interference in the HV electric fields. It is achieved by very efficient filtration.

SAT 30 A

• Output voltage is selectable from 10 V to 300 V DC or from 10 V to 250 V AC.
• The set is equipped with thermal and over current protection.
• SAT30A is easy to use and has accessory cable-set with touch-proof contacts.
• The SAT30A has very high ability to cancel electrostatic and electromagnetic interference in the HV electric fields. It is achieved by very efficient filtration.
• Powerful – up to 30 A

RMO60E Protective earth resistance meter

Lightweight – only 7,5 kg
Powerful 10 A – 60 A DC
Measuring range 100 µΩ – 999,9 mΩ
Resolution to 0,1 µΩ
SINGLE / CONTIN Mode
Mechanical protection IP43

The RMO60E is ideal for testing protective bonding (grounding) of equipment following the standard IEC 61010-1.

The RMO60E generates true DC current with automatically regulated test ramps. During the test RMO60E ramps with increasing current before measuring and decreasing current after the measurement. This eliminates magnetic transients. After the test current has been set, pressing the Ω button starts the automatic test procedure.

RMO200G

• test current from 5 to 200 A, weighs only 8 kg / 17.6 lbs

RMO 500G

• Test current from 5 to 500 A, weighs only 9 kg / 20 lbs

RMO – TW SERIES

• Three-channel winding resistance measurement.
• One temperature measurement channel.
• Demagnetization.
• Tap changer verification.

RMO – H SERIES

• Handheld, only 0,95 kg (2.1 lbs) weight
• IP54 mechanical protection rating
• Designed to make multiple measurements and full day’s work of testing without a battery recharge
• Safe testing in Both Sides Grounded (BSG) conditions
• Regulated, user selectable test current of up to 300 A.

RMO – G SERIES

• Measuring range: 0,1 μΩ – *999,9 mΩ (*499,9 mΩ for RMO800G)
• Resolution: 0,1 μΩ
• Typical accuracy: ± (0,1 % rdg + 0,1 % FS)
• Remote Control Unit (optional)
• Both Sides Grounded Unit (optional)
• SINGLE / CONTIN / BSG / DTRtest modes
• the Test current goes up to 800A for the RMO800G model

RMO – D SERIES

• Measuring range: 0,1 μΩ – 999,9 mΩ
• Resolution: 0,01 μΩ
• Typical accuracy: ± (0,1 % rdg + 0,1 % FS)
• Remote Control Unit (optional)
• Both Sides Grounded Unit (optional)
• SINGLE / CONTIN / BSG / DTRtest modes
• DEMAGNETIZATION feature

RMO – A SERIES

• Measuring range: 0,1 μΩ – 999,9 mΩ
• Resolution: 0,1 μΩ
• Typical accuracy: ± (0,1 % rdg + 0,1 % FS)
• Rmax function (pass/fail criteria)
• Protection rating: IP43

RMO – 60TD

• Test currents 5 mA – 60 A DC
• On-load tap changer dynamic resistance measurement
• Three resistance measurement channels
• Rapid automatic demagnetization
• Tap changer motor current monitoring channel
• Automatic discharge circuit
• Built-in tap changer control unit
• Detailed analysis of test results using DV-Win software
• USB flash drive feature

RMO – 60TT

• Test current up to 60 A
• On-load tap changer dynamic resistance measurement
• Three resistance measurement channels
• Four temperature measurement channels
• Automatic resistance/temperature measurement for the Heat Run test
• Rapid automatic demagnetization
• Vibration measurement
• Tap changer motor current monitoring channel
• Automatic discharge circuit
• Built-in tap changer control unit
• Detailed analysis of test results using DV-Win software

RMO – 30TW

30A maximum test current
Portable and lightweight instrument (8,5 kg / 18.7 lbs) designed for the winding resistance measurement of inductive test objects and for on-load tap changer verification. The RMO30TW instrument generates a true DC ripple-free current with automatically regulated measurement and discharging circuit. The injection of current and discharge of energy from the test object are both automatically regulated. The three independent channels enable testing of three windings in series. This instrument enables measurements of a winding resistance in every tap position of an on-load tap changer without discharging between the tests. Problems with switching of the OLTC, such as interruption, can be detected with these measurements.

RMO – 20TW

20A maximum test current
The Winding Ohmmeter RMO20TW is a portable and lightweight instrument (7,5 kg / 16.5 lbs) designed for the winding resistance measurement of inductive test objects and for on-load tap changer verification. The RMO20TW instrument generates a true DC ripple-free current with automatically regulated measurement and discharging circuit. The injection of current and discharge of energy from the test object are both automatically regulated. The three independent channels enable testing of three windings in series. This instrument enables measurements of a winding resistance in every tap position of an on-load tap changer without discharging between the tests. Problems with switching of the OLTC, such as interruption, can be detected with these measurements.

RMO – 100TT

• Test current up to 100 A
• On-load tap changer dynamic resistance measurement
• Three resistance measurement channels
• Four temperature measurement channels
• Automatic resistance/temperature measurement for the Heat Run test
• Rapid automatic demagnetization
• Vibration measurement
• Tap changer motor current monitoring channel
• Automatic discharge circuit
• Built-in tap changer control unit
• Detailed analysis of test results using DV-Win software

POB 40AD

circuit breaker coil operation
spring-charging motor supply
lightweight – only 10,6 kg / 23.4 lbs
minimum trip voltage test of the circuit breaker’s coils
as a power supply for tests with breaker analyzers from different vendors
Powerful – up to 40 A

POB 30 AD

circuit breaker coil operation
spring-charging motor supply
lightweight – only 10,6 kg / 23.4 lbs
minimum trip voltage test of the circuit breaker’s coils
as a power supply for tests with breaker analyzers from different vendors
Powerful – up to 30 A

IBAR

Quickly records and stores internal resistance, float voltage, and inter-cell connection resistance
Tests flooded lead acid, VRLA, Ni-Cd, and Li-ion batteries and strings
Automatic detection of resistance range
Incudes DV-B Win software
Support tool during capacity test for cell voltage measurements
Pass/Warning/Fail indication during testing based on set parameters

Handheld Micro Ohmmeters RMO-H series

First handheld micro ohmmeter (only 0,95 kg / 2.1 lbs) which generates regulated DC current up to 300 A!

The RMO-H micro ohmmeters are ideal for a number of applications for contact resistance measurements of non-inductive test objects. Typical applications are testing a circuit breakers and disconnecting switches, high-current bus bar joints, cable splices, welding joints, etc.

RMO-H series consists of three models:

RMO-H1 (up to 100 A DC)
RMO-H2 (up to 220 A DC)
RMO-H3 (up to 300 A DC)

GGT500 Ground Grid Tester

Ground Grid Tester with 300 A
Powerful Micro Ohmmeter with test current up to 500 A DC
5 separate test modes: GROUND GRID / SINGLE / CONTIN / BSG / DTR test modes
Lightweight – 9 kg / 20 lbs
Measuring range 0 – 999,9 mΩ
Best resolution 0,1 µΩ
Typical accuracy ± (0,1 % rdg + 0,1 % FS)
Remote Control capability
Test Both Sides Grounded Circuit Breakers

Ground Grid Tester GGT500 is a test set specially designed for inspection of substation ground grids. During the measurement instrument generates 300 A during a time period of 60 s or longer. Current and voltage drop are measured and displayed during the test. Test is performed with one set of current cables. One cable is connected to the referent grounding point in substation, and the second cable is connected to the testing ground point in the substation. With additional current clamps, current flow through the grounding is being inspected. Based on the current values measured with current clamps the state of the ground grid under the substation can be determined

DEM 60C

• Fully automatic demagnetization
• Demagnetization currents 5 mA – 60 A DC
• Demagnetization process graph
• Automatic discharging circuit
• Lightweight – 13,1 kg

Circuit Breaker Analyzer & Timer CAT65

Timing and motion measurement
6 timing channels (3×2) for main and resistive contacts
6 timing channels for auxiliary inputs
6 coil control channels
3 transducer input channels
6 additional analog input channels
Built-in Micro Ohmmeter 200A
Dynamic resistance measurement
Detailed analysis of test results using DV-Win software

The Circuit Breaker Analyzer & Timer CAT65 instrument utilizes the latest improvements for safe and fast testing, with unique technical capabilities for additional diagnostics of circuit breakers. Sophisticated design ensures efficient and reliable operations in high-voltage substations and industrial environments.

Static resistance measurement
The built-in micro ohmmeter generates a true DC ripple free current with an automatically regulated test ramp.

DRM (Dynamic Resistance Measurement)
The built-in micro ohmmeter can also be used for the DRM. The DRM test is performed by injecting a current through the breaker contact and simultaneously monitoring the voltage drop across the breaker contact as well as the current flow during the operation of the breaker. The DRM test requires the circuit breaker analyzer with a high-resolution measurement. The resistance curve, as a function of a contact travel can be used to reveal potential problems related to the arcing contact condition. The injected current value should be as high as possible but not less than 100A to provide a reliable voltage drop reading, thus allowing an easier detection of the arcing contact. This model provides up to 200A.

Circuit Breaker Analyzer & Timer CAT125

Timing and motion measurement
12 timing channels (3×4) for main and resistive contacts
6 timing channels for auxiliary inputs
6 coil control channels
3 transducer input channels
6 additional analog input channels
Built-in Micro Ohmmeter 200A
Dynamic resistance measurement
Detailed analysis of test results using DV-Win software

The Circuit Breaker Analyzer & Timer CAT125 instrument utilizes the latest improvements for safe and fast testing, with unique technical capabilities for additional diagnostics of circuit breakers. Sophisticated design ensures efficient and reliable operations in high-voltage substations and industrial environments.

Static resistance measurement
The built-in micro ohmmeter generates a true DC ripple free current with an automatically regulated test ramp.

DRM (Dynamic Resistance Measurement)
The built-in micro ohmmeter can also be used for the DRM. The DRM test is performed by injecting a current through the breaker contact and simultaneously monitoring the voltage drop across the breaker contact as well as the current flow during the operation of the breaker. The DRM test requires the circuit breaker analyzer with a high-resolution measurement. The resistance curve, as a function of a contact travel can be used to reveal potential problems related to the arcing contact condition. The injected current value should be as high as possible but not less than 100A to provide a reliable voltage drop reading, thus allowing an easier detection of the arcing contact. This model provides up to 200A

Circuit Breaker Analyzer & Timer – CAT64

• Simple & easy to operate
• Timing and motion measurement
• 6 timing channels for main and resistive contacts
• 3 timing channels for auxiliary inputs
• Resistance measurement of pre-insertion resistors
• 4 Analog Inputs + 1 Transducer Input
• Supports both digital and analog transducers
• Detailed analysis of test results using DV-Win software

Circuit Breaker Analyzer & Timer – CAT61

• Simple & easy to operate
• Timing measurement
• 6 Channels for main contacts
• 3 Channels for auxiliary inputs
• TRIP & CLOSE coils current measurement
• Resistance measurement of pre-insertion resistors
• Detailed analysis of test results with DV-Win software

Circuit Breaker Analyzer & Timer – CAT126

• Timing and motion measurement
• 12 timing channels (3×4) for main and resistive contacts
• 6 timing channels for auxiliary inputs
• 6 coil control channels
• 3 transducer input channels
• 6 additional analog input channels
• Built-in Micro Ohmmeter 500A
• Dynamic resistance measurement
• Detailed analysis of test results using DV-Win software

Circuit Breaker Analyzer & Timer – CAT P

• First trip test (Online test)
• Main arcing-contacts operating time including bounce-time
• Timing and resistance measurement of the pre-insertion resistors (if present in the circuit breaker)
• Auxiliary contact operating time
• Actuation of circuit breaker’s TRIP and CLOSE coil via external module (Coil Control Module)
• TRIP and CLOSE coils current with values for specific points and corresponding graphics
• Voltage values and condition of a DC battery

Circuit Breaker Analyzer & Timer – CAT H

• Main arcing-contacts operating time including bounce-time
• Timing and resistance measurement of the pre-insertion resistors (if present in the circuit breaker)
• Actuation of circuit breaker’s OPEN and CLOSE coil via Coil control (built-in)
• Auxiliary contact operating time
• CLOSE and OPEN coils current with values for specific points and corresponding graphics
• Voltage values and condition of a DC battery

BXL-A

designed for parallel operation with BLU-A series
applicable to 5,25 V – 300 V DC battery systems
weight – 12,5 kg (28 lbs.)
discharge power – up to 25,4 kW
discharge current – up to 250 A

BVS

Efficient analyzer for battery discharge testing
Automated string and cell voltage, and intercell connection voltage, string current and ambient temperature measurements during capacity tests
Detection and notification of failing cells
Reliable and easy to operate
Detailed test analysis and reporting provided using DV-B Win software

BVR11

CELL VOLTAGE MEASUREMENT
STRONG VOLTAGE MEASUREMENT
AMBIENT TEMPERATURE MEASUREMENT
USB COMMUNICATION WITH PC
BLUETOOTH COMMUNICATION WITH PC

Battery Voltage Recorder – BVR22

• Handheld
• Automatically measures, time-stamps, stores voltages in less than 1 second
• Simultaneous string (cell) voltage and DC current measurement, for use in the discharge test
• Voltage measurement range: ± 600 V DC
• Cell (electrolyte) temperature
• Ambient temperature
• RFID cell recognition
• Easy transfer of measured data to DV-B Win software

Battery Load Unit – BLU360V

• Lightweight – 20,6 kg (45.4 lb.)
• Powerful – discharge power up to 28,4 kW
• Battery voltage: 6 to 480 V DC (min 5,25 – max 500 V DC)
• Discharge current – up to 160 A DC
• Battery internal resistance measurement according to IEC 60896
• Expandable range for larger banks using BXL-V extra load units
• Current measurement range using Current Clamp 0 – 1 000 A DC
• User – adjustable alarm and shutdown parameters to prevent excessive discharge
• Testing without disconnecting the regular load
• Detailed test analysis using DV-B Win software
• Test resume feature in case of interrupted power supply

Battery Load Unit – BLU220T

• Optimal for applications in telecommunication systems
• Lightweight – 15,1 kg (33 lb.)
• Powerful – discharge power up to 19,2 kW
• Voltage measurement range: up to 70,5 V DC
• Discharge current – up to 340 A DC
• Expandable range for larger banks using BXL-T extra load units
• Current measurement range using Current Probe 0 –300 / 1 000 A DC
• User – adjustable alarm and shutdown parameters to prevent excessive discharge
• Testing without disconnecting the regular load
• Detailed test analysis using DV-B Win software
• Test resume feature in case of interrupted power supply

Battery Extra Load Unit – BXL-T

• Used in a combination with a BLU220T device to increase load capacity
• Lightweight – 12,5 kg (28 lb.)
• Powerful – discharge power up to 17,5 kW
• Voltage measurement range: up to 75 V DC
• Discharge current – up to 310 A DC
• Measurement resolution – current 1 A, voltage 1 V
• Discharge process controlled by a BLU220T device
• Connects to battery terminals and parallel to BLU220T

Battery Extra Load Unit BXL-V

• Used in a combination with BLU360V device to increase load capacity
• Lightweight – 16 kg (35 lb.)
• Powerful – discharge power up to 35 kW
• Voltage measurement range: 0 – 500 V DC
• Discharge current – up to 190 A DC
• Measurement resolution – current 1 A, voltage 1 V
• Discharge process controlled by BLU360V device
• Connects to battery terminals and parallel to BLU360V

Battery Charger BAC25A

Lightweight – only 10 kg (22 Ibs)
Instrument max power – up to 2,7 kW
Voltage range: 10-300 V DC
Current range up to 25 A DC
Measurement resolution – current 0,1 A, voltage 0,1 V
Two charging modes available: IUU – constant current + constant voltage UU – constant voltage + constant voltage, with current limit
Adjustable alarm and shutdown parameters for preventing excessive charge

Battery Capacity Tester – BLU200A

Battery Capacity Tester – BLU200A

weight – 14,5 kg (32 lbs)
discharge power – up to 19,7 kW
discharge current – up to 240 A
applicable to 5,25 – 300 V DC battery voltages

Battery Capacity Tester – BLU360V

weight – 20,6 kg (45.4 lb)
discharge power – up to 28,4 kW
discharge current – up to 160 A
applicable to 5,25 – 500 V DC battery voltages

Mr Mäkängä - Director

Mr. Mäkängä is our software director. He has experience in power monitoring systems and IoT hardware that collect data. He is trained in python, php, c++ & java. He is also involved in our frontend web animation, php backend, android & database management system. He is also involved in charity work to help the community in the area he lives in to uplift the standards of living, culture & environment. He is also our lead in sustainable systems, he is researching solar, wave technology and wind energy. His goal is to create an environmental friendly eco-system of power production of clean energy and affordable electricity for rural homes. In achieving this goal he is able to reach out to his surroundings and improve the life of the common person through affirmative action and impact initiatives of concern for a better future.

Job Githinji - Head of Operations

Job, who holds an electrical engineering degree from the Technical University of Konstanz, Germany, has over 25 years’ experience in the energy sector. Job’s expertise spans medium and high voltage transmission lines and substations, distribution systems, generation engineering plant and infrastructure. Job has been involved in the energy transmission, distribution and generation sectors in Kenya, Uganda, Tanzania and South Sudan.

Specific experience includes design and construction supervision of transmission lines and substations including EPC contract administration and quality assurance procedures. Network reconfiguration commissioning, operation and maintenance of electrical equipment. Job is also an expert in negotiating Power Purchase Agreements.

Eng. Githinji has been involved in feasibility studies, conceptual designs, tender document preparation, tender evaluation and procurement of contractors for World Bank and African Development Bank funded projects. Job has an extensive understanding of the infrastructure development dynamics and potential in the African region, having been involved in business development of projects covering multipurpose dam with power generation, power transmission, water supply and irrigation components, roads and railways, ports and oil refineries.

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