Electrode boilers

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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

Electrode boilers

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

Name of the test	Type of test	Test norms	Directions
25.1. Measurement of the resistance of the water column of the insulating insert	K, T or M	The resistance of the water column (Ohm) in each of the inserts must be at least 0,06U_ф×n; where U_ф - phase voltage of the electrode boiler, V; n - the number of insulating inserts of all boilers in the boiler room	Measured for electrode boilers with voltages above 1000 V
	K, T or M	Not less than 200n	Measured for electrode boilers up to 1000 V
25.2. Measuring the resistivity of feed (mains) water	K, M	At 20°C must be within the limits specified by the manufacturer	It is measured at electrode boilers before start-up and when changing the source of water supply, and when supplied from open reservoirs - at least 4 times a year
25.3. Power frequency overvoltage test:	К	Test duration - 1 min.	-
1) insulation of the boiler body together with insulating inserts freed from water		See table. 5 (Annex 3.1)	-
2) insulating inserts		Produced by two times the rated phase voltage	-
25.4. Boiler insulation resistance measurement without water	К	Not less than 0,5 MΩ, unless higher requirements are specified by the manufacturer	Measured in the position of the electrodes at maximum and minimum power in relation to the body with a megohmmeter for a voltage of 2500 V
25.5. Checking the operation of the boiler safety equipment	K, T, M	Manufactured in accordance with local regulations and manufacturer's instructions

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