Measurement of electricity quality

For power quality measurements, we use the Metrel Ml-2885 Master Q4 series energy analyser, which meets the requirements of the standard SFS 50160. The increasing number of electrical appliances and their electronics in buildings cause disturbances in the property's electricity distribution network. These disturbances may take the form of flicker, momentary outages or transient spikes. Voltage and frequency imbalances, earth currents and harmonic surges damage equipment and can be harmful, for example in a hospital environment. When concerns arise about the quality of the electricity network, effective power quality analysis is necessary to avoid high costs. In general, the measurement procedure is of longer duration in order to obtain a reliable analysis of the power quality. Usually from 30 days to 60 days. The analyser is left on site to measure for the necessary time. The event is monitored remotely from our office. After the measurement, we deliver a report and review it with the customer. If there are any faults, they are investigated on site and the necessary changes and repairs are made to clean the network.

Special measurements for buildings, industry and hospitals

We use the METREL MI2094 machine and electrical equipment tester to perform the measurements and tests required by the standards. Penetrations, insulation, continuity, voltage drops, leakage currents and discharge times. Burn testing at high voltage. Continuity of potential equalisation in Group 2 medical premises using 10 A test current.

For electrical testing of buildings we use METREL 3102 BT series meters. The MI 3102 BT installation tester is easy to use and reliable. The installation tester has an automatic test function AUTO SEQUENCE: for TT, TN and IT systems. We carry out commissioning tests even in large-scale for electrical contractors all over Finland. We have several meters at our disposal.

The inspections and measurements required for electric vehicle charging stations are carried out according to the SFS 6000 standard. The protocol is made according to ST 51.91.

Detection, location and repair of cable faults

The LA102 cable troubleshooter is a handy tool for locating cables that are faulty or need to be traced. It's easy to locate wire boxes trapped in structures or damaged cables buried underground. The cable detector consists of a transmitter and a receiver that can be used to locate and trace electrical cables. The transmitter emits a modulated current that forms an electromagnetic field around the conductor. This electromagnetic field induces a voltage in the receiver. The voltage induced in the coil is amplified, decoded and converted to its original form in the receiver and displayed on the screen. The operation of the transmitter requires a closed circuit.

Thermal imaging of electrical installations in buildings

The possessor of an electrical appliance is usually also the owner of the appliance. The owner of the equipment must ensure that the electrical equipment and systems are safe to use. The owner must ensure that the installation is fire-safe. In Finland, the single biggest cause of fires is electrical fires. When looking at electrical equipment fires, the main causes are:

• electrical substations

• electrical wiring and cabling

• sockets and buttons

As a preventive measure, property owners should pay attention to the amount of dirt and dust on cable racks and the cables running through them, in addition to thermography of electrical equipment. We carry out extensive cleaning and repairs of cable racks. For thermal imaging we use HIKMICRON M10 series thermal imaging cameras.

Commissioning measurements of photovoltaic systems

We carry out commissioning measurements and commissioning of solar power plants for contractors all over Finland. We have brand new meters METREL Ml3109PS and METREL Ml3109. MI-3109 PS Pro is designed for DC-side testing of solar panels. The tester is suitable for both commissioning measurements and condition monitoring of solar panels. The tester can also be used to check the DC to AC efficiency of a target. In addition to the required PE conductor continuity and installation insulation resistance measurements, the meter also tests the I-V characteristic curve and calculated STC (Standard Test Conditions) values of the panels.