Parameters of explosion-proof connections of electrical equipment of the 1st, 2nd, 3rd categories according to PIVRE (PIVE)

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Appendix 5. Characteristics of explosion-proof connections of explosion-proof equipment

Parameters of explosion-proof connections of electrical equipment of the 1st, 2nd, 3rd categories according to PIVRE (PIVE)

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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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Table A5.1

Type of flameproof connection	Free volume of the shell, cm³	Category 1			Category 2			Category 3
Type of flameproof connection	Free volume of the shell, cm³	Slit length L₁, mm	Slot length to bolt hole L₂, mm	*Gap width W₁ and W_d, mm**	Slit length L₁, mm	Slot length to bolt hole L₂, mm	*Gap width W₁ and W_d, mm**	Slit length L₁, mm	Slot length to bolt hole L₂, mm	*Gap width W₁ and W_d, mm**
Fixed flameproof joints (Fig. A5.1 and A5.2)	Until 200	5	5	0,5	5	5	0,3	5	5	0,2
	From 200 500 up	8	5	0,5	8	5	0,3	8	5	0,2
	From 500 2000 up	15	8	0,5	15	8	0,3	15	8	0,2
	over 2000	25	10	0,5	25	10	0,3	25	10	0,2
Connections of movable mates (Fig. A5.3)	From 500 2000 up	15	-	0,5	15	-	0,4	15	-	0,3
	over 2000	25	-	0,6	25	-	0,4	25	-	0,3
	over 2000	40	-	0,75	40	-	0,5	40	-	0,4
Connections of control rods and rollers (Fig. A5.4)	Until 200	10	-	0,25	10	-	0,25	10	-	0,15
	From 200 500 up	15	-	0,25	15	-	0,25	15	-	0,15
	From 500 2000 up	15	-	0,25	15	-	0,25	15	-	0,15
	over 2000	25	-	0,15	25	-	0,25	25	-	0,15

*In PIVRE, the slot width is denoted by S1 and Sd.
Parameters of explosion-proof connections of electrical equipment of the 1st, 2nd, 3rd categories according to PIVRE (PIVE)

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