Construction

PLO... switches consist of two switch-disconnectors of LO-...S type (which have got special driving shaft) and one switching over mechanism of HDJ type. Switching over mechanism of HDJ type has got 3 operating positions I-O-II and it is fixed directly on the shafts of the switch-disconnector. Current torahs in main poles possess for two isolating pauses. The hand drive assures the instantaneous joining of points of junction aside from of the speed of the displacement of the lever of the drive. The enclosure and the disconnection of LO switch disconnectors takes place by means the lever of the drive to push with the rotary motion for the corner 900 whose the construction does not permit to qualify current state the switch disconnector. The real position of chattel (the state of the close or the opening) points of junction signalled is only a visible visual indicator from the side of the driving (the green colour ,,O” – the off-state, the red ,, I” – the state of the nclosure) lever.

Application
PLO switches are intended for swit-ching over and switching off various types of supply, e.g. Switching between supply from mains – supply from the standby diesel generator, when working value of the current does not exceed rating values of current. PLO switches are offered in two current sizes as the following types:
– Behind-panel-mounted switches in horizontal configuration with direct drive – type PLO‑.../H1,
– Behind-panel-mounted switches in vertical configuration with direct drive – type PLO‑.../H2,
– Switches for on-board mounting with direct drive – type PLO-.../K.

Type	Identifcation No	Item No.
PLO-2525/H1	P255 2122T1	621-T01001
PLO-2525/H2	P256 2122T1	621-T01002
PLO-2525/K	P257 2122T1	621-T01003
PLO-4040/H1	P405 2122T1	621-T02001
PLO-4040/H2	P406 2122T1	621-T02002
PLO-4040/K	P407 2122T1	621-T02003

Switch for currents up to 250 A – behind-panelmounted type in horizontal configuration with direct drive.
PLO-2525/H1 P255 2122T1

Switch for currents up to 250 A - on-boardmounted type with direct drive.
PLO-2525/K P257 2122T1

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Type				PLO-2525/H1 PLO-2525/H2	PLO-2525/K	PLO-4040/H1 PLO-4040/H2	PLO-4040/K
Main contacts
Rated insulation voltage		Ui	[V]	690
Rated insulation voltage		Ue	[V]	500
Rated continous current	AC21A, 500 V	Iu	[A]	250		400
Rated switching current		Ie	[A]	250		400
Rated frequency of switching			[h-1]	120
Usage category			-	AC-21A
Threads of terminal screws			-	M10		M12
Conn. conductors cross-sections	conductors with Terminal		[mm²]	120		240
	bus-type conductor		[mm]	30		30
Auxiliary contacts
Rated insulation voltage		Ui	[V]	400
Rated switching current	AC15 - 400 V	Ie	[A]	2,5
	DC13		[A]	0,16
Max Conn. conductors cross-sections			[mm²]	2,5
Weight			[kg]	8	10	8,5	10,5

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Behind-panel-mounted switches in horizontal configuration with direct drive – type PLO-.../H1

	P – mounting plate

Type	A	B	C
PLO-2250/H1	140	162	M10
PLO-4040/H1	154	181	M12

Behind-panel-mounted switches in vertical configuration with direct drive – type PLO-.../H2

Type	A	B	C	D
PLO-2525/H2	140	68	370	M10
PLO-4040/H2	154	54	389	M12

Switches for on-board mounting with direct drive – type PLO-.../K