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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Annex 3. Standards for testing electrical equipment and apparatus for electrical installations of consumers

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Encyclopedia of radio electronics and electrical engineering / Rules for the technical operation of consumer electrical installations (PTE)

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K, M - are produced within the time limits established by the PPR system.

Name of the test	Type of test	Test norms	Directions
8.1. Checking the insulation resistance of suspension and support porcelain insulators	К	The resistance of each suspension porcelain insulator or each element of a multi-element insulator must be at least 300 MΩ	Produced with a megohmmeter for a voltage of 2500 V only at a positive ambient temperature
8.2. High voltage insulation test	К	The values of the test voltage are given in table. 5 (Annex 3.1)	Newly installed multi-element or suspension porcelain insulators must be tested with an increased voltage of 50 kV, frequency 50 Hz, applied to each element of the insulator
8.3. Checking the condition of bushings and bushings	K, M	Produced in accordance with the instructions in section 9	-
8.4. Control of contact connections	М	Produced in accordance with the instructions in section 1	-
8.5. Thermal imaging control	М	Produced in accordance with established standards and manufacturer's instructions

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PROmax - Weidmueller power supplies for heavy duty applications 02.09.2015

PROmax power supplies are designed in a narrow DIN-rail housing, are highly reliable (MTBF>500000 hours) and are designed for harsh environments.

The PROmax series is guaranteed to start at a temperature of -40°C, allows long-term operation at an overload of 120% and short-term operation up to 300%. The specified overload capacity allows the new series to be used to supply capacitive and inductive loads, as well as to build a system with selective load sharing using circuit breakers.

With high efficiency and well-thought-out technical solutions, PROmax series power supplies can be installed close to other system components during installation, which allows, in addition to a narrow housing, to save space.

The PROmax series is available in output power from 70 to 960 W for operation in single-phase or three-phase networks. The power supplies have a power factor correction circuit, a status relay. They also have a moderate inrush current of up to 15 A. PROmax series power supplies are designed for demanding applications in mining and process industry automation systems.

Main technical parameters of the PROmax series:

Output power from a range: 72, 120, 180, 240, 480, 960W;
Output voltage from a range: 5, 12, 24, 48 V (depending on power);
Peak overload capacity up to 300%;
Long-term overload capacity up to 120%;
Temperature range -25...+70°С (start from -40°С);
Efficiency 91% (typ.);
Power factor >0,95;
Starting current <15A.

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