Measurement and diagnostics - expert activities

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We offer specific electro services. In some cases, they are part of the supply of products offered.

They are:

electrical designing activities (Autocad, Eplan)
analysis of electrical networks from 0.4kV to 420kV (network quality measurement)
network mathematical models - network simulation with NEPLAN360
parameterization of multifunctional digital and analogue protection
without disconnecting method of measuring capacities of high voltage capacitors
thermovision with FLIR E60
revision activity
measuring partial discharges of transformers up to 36kV (we are preparing)
operation and maintenance of electrical equipment - spare parts
we use the following devices for work and training

designing of electro (Autocad, Eplan)

design of compensating switchboards (power and control wiring, arrangement of elements, material specification)
Power main switchboards (control wiring, layout)
design of passive and active filters - filter compensating devices
design of protection systems,
design - projection of emergency flash protection HZO
project of actual execution of existing electrical equipment
projects of high-voltage transformer stations, projects of power lines - connections
transformer station projects for building permits

analysis of electrical networks from 0.4kV to 420kV (measurement of network quality)

30 portable analyzers CHAUVIN ARNOUX C.A.8334 and 8336 plus 1 pc ELCOM ENA 330
consumption balance P, Q, S, power factor, frequency, short-term network drops - micro-failures - flicker, analysis of higher harmonic voltages and currents, total voltage and current distortion (feedback) and other parameters according to EN 50160
transition processes when switching transformers, electric furnaces, rolling mills, etc.
transition events of non-standard distribution network events
EMC compatibility
processing of a protocol of measured results with a proposal of a solution

mathematical models of networks - network simulation using NEPLAN360

short-circuit conditions
design of protection selectivity
harmonic analysis - propagation of higher harmonics in the network
flash energy calculation
network load - energy flows
system start-up behavior - grid oscillation
selectivity of distance protection
simulation of energy system behavior at different operating states of the system connection.

parameterization of mutlifunctional digital and analog protections

Universal protection configuration:
ABB, SIEMENS, SCHEIDER ELECTRIC (SEPAM & MICOM), ALSTOM, SEL, VAMP, ARCTEQ, etc.
secondary and primary protection tests
Sverker and Omicron testing devices
periodic revision of protections (protection of protection, tripping paths, communication paths)
protection setup project
drawing up a protocol

capacitor capacitance measurement, inductance and resistance

Measured values report - comparison with values from a piece test

thermovision with FLIR E60

thermal imaging of power apparatus
thermovision of electrical connections, photovoltaic panels
protocol of measured values

revision activity

revision of LV and HV electrical equipment
initial and periodic revisions
the audit report

measurement of partial discharges of transformers up to 50kV

Method of partial discharges of dry and oil transformers at the customer, as well as MV cables during operation - no need to shut down the equipment
determination - transformer / insulation accident prediction (planned service life)
analysis of no-load losses and short-term losses (under preparation)
protocol of measured values

operation and maintenance of electrical equipment - spare parts

we operate 13 medium voltage / low voltage transformer stations
12 MW photovoltaic power plants in the Czech Republic and Slovakia
We provide complete activities (operation, maintenance) at the highest level
local dispatching of electrical components, inverters and balance of production and consumption, intrusion alarm system, data collection
photovoltaic panel repairs (bypass diode replacement)
repairs of photovoltaic inverters (SMA and KACO decentralized)
repair of industrial electronics

we use the following electric tools

30 pcs Chauvin Arnoux CA8336 Qualistar - portable network quality analyzer with internal memory
1 piece ENA 330 ELCOM - portable network quality analyzer with internal memory
1 pc multifunction instrument for capacitor, choke and resistance measurement - DS-LCR-900
1 pc digital and analogue protection tester 1 phase - current and voltage source type TD1000 - Altanova Isa Italy
1 pc digital and analog protection tester 3 phase - current and voltage source type DRTS64 - Altanova Isa Italy
1 pc monitoring device for partial discharges of transformer and cable insulations up to 50kV - type Aquilla - Altanova Techimp Italy
1 pc monitoring equipment - frequency response of transformers - type SFRA5000 - Altanova Isa Italy
1 pc set of monitoring equipment for testing transformers type STS 5000 and STLG - Altanova Isa Italy
1 piece monitoring set Tan Delta type TD5000 - Altanova Isa Italy
1 pc control 3f autotransformer Metrel 12kVA 400 / 450V
5 sets of disturbance recorders (Arcteq F200 multifunctional protection with remote access)
5 sets of democampers with Arcteq F200 protection terminal - technician training - protection parameterization
1 low-voltage switchboard - 400V - Arc short circuit breaker (mains) AQ-1000
1 Arcteq flash short circuit protector - 12 kV AQ-2000
Merus Power Low Voltage Active Harmonic Filters from 100 to 200A
UPQ backup unit of short-term observations (micro-failures) 150kW / 5s (supercapacitors), resistive load 9 x 1 Ohm / 230A, inductive and capacitive loads
In 2019, we launched our own laboratory - testing room, which is powered from high-voltage transformer 22kV 400kVA, serving for internal tests of supplied equipment. Here we confirm the electrical parameters in real operation and show them to customers.