STEU 500/24

Control- and safety isolating transformer

Version STEU 500/24

Rated input voltage 230/400 Vac Rated output voltage 2 x 12 Vac Rated power VDE (DB cos phi=1) 500 VA

Version	Rated input voltage	Rated output voltage	Rated power VDE (DB cos phi=1)
STEU 20/23	230/400 Vac	2 x 115 Vac	20 VA
STEU 20/24	230/400 Vac	2 x 12 Vac	20 VA
STEU 63/24	230/400 Vac	2 x 12 Vac	63 VA
STEU 63/48	230/400 Vac	2 x 24 Vac	63 VA
STEU 63/23	230/400 Vac	2 x 115 Vac	63 VA
STEU 100/24	230/400 Vac	2 x 12 Vac	100 VA
STEU 100/48	230/400 Vac	2 x 24 Vac	100 VA
STEU 100/23	230/400 Vac	2 x 115 Vac	100 VA
STEU 160/24	230/400 Vac	2 x 12 Vac	160 VA
STEU 160/48	230/400 Vac	2 x 24 Vac	160 VA
STEU 160/23	230/400 Vac	2 x 115 Vac	160 VA
STEU 250/24	230/400 Vac	2 x 12 Vac	250 VA
STEU 250/48	230/400 Vac	2 x 24 Vac	250 VA
STEU 250/23	230/400 Vac	2 x 115 Vac	250 VA
STEU 320/24	230/400 Vac	2 x 12 Vac	320 VA
STEU 320/48	230/400 Vac	2 x 24 Vac	320 VA
STEU 320/23	230/400 Vac	2 x 115 Vac	320 VA
STEU 400/24	230/400 Vac	2 x 12 Vac	400 VA
STEU 400/48	230/400 Vac	2 x 24 Vac	400 VA
STEU 400/23	230/400 Vac	2 x 115 Vac	400 VA
STEU 500/24	230/400 Vac	2 x 12 Vac	500 VA
STEU 500/48	230/400 Vac	2 x 24 Vac	500 VA
STEU 500/23	230/400 Vac	2 x 115 Vac	500 VA
STEU 630/24	230/400 Vac	2 x 12 Vac	630 VA
STEU 630/23	230/400 Vac	2 x 115 Vac	630 VA
STEU 630/48	230/400 Vac	2 x 24 Vac	630 VA
STEU 800/24	230/400 Vac	2 x 12 Vac	800 VA
STEU 800/48	230/400 Vac	2 x 24 Vac	800 VA
STEU 800/23	230/400 Vac	2 x 115 Vac	800 VA
STEU 1000/24	230/400 Vac	2 x 12 Vac	1,000 VA
STEU 1000/48	230/400 Vac	2 x 24 Vac	1,000 VA
STEU 1000/23	230/400 Vac	2 x 115 Vac	1,000 VA
STEU 1600/23	230/400 Vac	2 x 115 Vac	1,600 VA
STEU 2000/23	230/400 Vac	2 x 115 Vac	2,000 VA
STEU 2500/23	230/400 Vac	2 x 115 Vac	2,500 VA

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CAD/CAE data 3D-CAD-Model (STEP) ePlan Makro

Technical data for STEU 500/24

Input
Rated input voltage	230/400 Vac
Tappings Input	±15 V
Rated frequency	50 - 60 Hz

Output
Rated output voltage	2 x 12 Vac
Rated power VDE (DB cos phi=1)	500 VA
Rated power VDE (KB cos phi=0.5)	2.000 VA
No-load voltage (app. x factor)	1.04
Efficiency	92.0 %

Standards
Classification	Control- and safety isolating transformer

Approvals
Approvals	cURus

Environment
Ambient temperature max.	40 °C
Type of cooling	self-cooling

Safety and protection
Type	Open type
Insulation class	VDE=B, UL=class 130
Protection index	IP 00
Safety class (prepared)	I
Short circuit strength	non-short-circuit proof

PRI Fusing recommendation by circuit breaker with tripping characteristic type 20 x Irated related to set)
Setting range 230 ±15 Vac	1.60 - 2.50 A
Setting value 230 ±15 Vac	2.40 A
Setting range 400 ±15 Vac	1.00 - 1.60 A
Setting value 400 ±15 Vac	1.40 A

Terminal and mounting
Fixing method	Base plate
Fixing screws	M5
Terminals Input	4 mm² spring terminal
Terminals Output	4 mm² spring terminal
Terminals PE	Tab connector, 6.3 x 0.8 mm

Measures and weights
Depth	124 mm
Height	121 mm
Width	120 mm
Weight	7.7 kg

Info on STEU series

General Data

Insulation class B
Degree of protection IP 00
Efficiency up to 94 %
Maximum ambient temperature 40 °C
Rated power 63 - 2,500 VA
Rated output voltage 24 - 230 Vac
Rated input voltage 230 and 400 Vac

Benefits

Quick to cable up thanks to the use of push-in terminals
High power density due to a compact construction design
Dual input voltage 230 and 400 Vac
Very good switch-on behaviour thanks to reduced starting currents
Very good corrosion protection and low noise thanks to BLOCK IMPEX vacuum impregnation
Contact protected screw connection terminals complying with UVV BGV A3
Primary side ±15 V tappings for voltage adjustment
Simple mounting thanks to robust metal footplate with oval slots
Up to 250 VA with combination footplate for bolted and rail mounting

Standards

Control transformer
to: VDE 0570 Teil 2-2, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-2,
UL 5085-1/-2, CSA 22.2 No.66
Safety isolating transformer
to: VDE 0570 Part 2-6, DIN EN 61558-2-6, EN 61558-2-6, IEC 61558-2-6, UL 5085-1/-2, CSA 22.2 No.66
Isolating transformer
to: VDE 0570 Part2-4, DIN EN 61558-2-4, EN 61558-2-4, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No.66

Approvals

UL 5085-1/-2, CSA 22.2 No.66

Applications

As an isolating transformer for the safe electrical isolation of the input and output sides. The transformer may be used to set up protective separation as a protective measure in accordance with VDE 0100.
As a control transformer for the electrical isolation of the input and output sides. The construction of the transformer is designed to supply control systems according to EN 60204.
As a safety transformer for the safe electrical isolation of the input and output sides. The transformer is suitable for creating SELV and PELV circuits because of the limit on the output voltage.

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