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ZT-45, ZTR-45

The transformer units type ZT-*45 and ZTR-*45 are manufactured in flameproof housings and equipped with the main transformer for 4.5kVA power rating. The units type ZT-*45 are equipped with two independent contactor circuits (outputs) and make it possible to supply the installations (e.g. lighting ones) with three-phase voltage of 133V or 230V or control one or two lower power motors. The transformer units type ZTR-*45 are designed for reversible control of a motor with maximum power of 3kW. Voltage change of the transformer unit secondary side is performed by a user during its installation. The relays used make it possible to control the unit by connecting the standard control circuit (R_off < 600 Ω) and „low ohm" circuit (R_off < 100 Ω).

Technical data

Item
rated primary voltage	V
three-phase transfomer power	kVA
secondary voltage	V
outside auxiliary voltages with leak control	V
maximum power of connected motors	kW
rated current of discharge 133/230 V	A
loop-through terminals permissible load	A
overload protection adjustment range	A
overload protection adjustment range	A
Central leakage protection 133/230 V	Ω
Interlocking protection 133/230 V	Ω
Central interlocking 42V circuit protection	Ω
overall dimensions (width x height x depth)	mm
Weight	kg
catalogue number	-
certified with mark	-
certificate number	-

Item		ZT-045	ZT-145	ZTR-045	ZTR-145
rated primary voltage	V	500, 50 Hz	1000, 50 Hz	500, 50 Hz	1000, 50 Hz
three-phase transfomer power	kVA	4,5+0,1Yy(d)	4,5+0,1Yy(d)	4,5+0,1Yy(d)	4,5+0,1Yy(d)
secondary voltage	V	133 (d) or 230 (y)	133 (d) or 230 (y)	133 (d) or 230 (y)	133 (d) or 230 (y)
outside auxiliary voltages with leak control	V	42, 50 Hz	42, 50 Hz	42, 50 Hz	42, 50 Hz
maximum power of connected motors	kW	1x3 or 2x1,5	1x3 or 2x1,5	1x3	1x3
rated current of discharge 133/230 V	A	19,5/11,3	19,5/11,3	19,5/11,3	19,5/11,3
loop-through terminals permissible load	A	180	180	180	180
overload protection adjustment range	A	1÷19,8	1÷19,8	1÷19,8	1÷19,8
overload protection adjustment range	A	3÷198	3÷198	3÷198	3÷198
Central leakage protection 133/230 V	Ω	7	7	7	7
Interlocking protection 133/230 V	Ω	15	15	15	15
Central interlocking 42V circuit protection	Ω	7	7	7	7
overall dimensions (width x height x depth)	mm	1070 x 785 x 540	1070 x 785 x 540	1070 x 785 x 540	1070 x 785 x 540
Weight	kg	240	240	240	240
catalogue number	-	AM-910047-03	AM-910047-06	AM-910066-03	AM-910066-06
certified with mark	-	CE 1453, I M2(M1) EX d [ia] I	CE 1453, I M2(M1) EX d [ia] I	CE 1453, I M2(M1) EX d [ia] I	CE 1453, I M2(M1) EX d [ia] I
certificate number	-	KDB 05ATEX284X	KDB 05ATEX284X	KDB 05ATEX284X	KDB 05ATEX284X

Information about types are available in catalogue.

Application

Transformer units are assigned for feeding electric mining tools and lighting circuits with a decreased three-phase voltage of 133V or 230 V.
Transformers units meet to requirements of the European Directive 94/9/EC (ATEX) for equipment in group I, category M2, and can be used in methane and coal dust exsplosion hazardous areas of underground mines.