Block STU Catalog Page

Universal control- and safety isolating- resp. isolating transformer

STU

Typ STU 63/24 STU 63/2x115 STU 100/24 STU 100/2x115 STU 130/24 STU 130/2x115

Input

Rated input voltage 210 Vac/230 Vac/250 Vac

380 Vac/400 Vac/420 Vac 440 Vac/460 Vac/480 Vac 500 Vac/520 Vac/540 Vac

210 Vac/230 Vac/250 Vac 380 Vac/400 Vac/420 Vac 440 Vac/460 Vac/480 Vac 500 Vac/520 Vac/540 Vac

Frequency range 50 - 60 Hz 50 - 60 Hz 50 - 60 Hz 50 - 60 Hz 50 - 60 Hz 50 - 60 Hz

Output

Rated output voltage 24 Vac 2x115 Vac 24 Vac 2x115 Vac 24 Vac 2x115 Vac

Rated power VDE (DB cos phi=1) 63 VA 63 VA 100 VA 100 VA 130 VA 130 VA

Rated power VDE (KB cos phi=0.5) 110 VA 110 VA 225 VA 225 VA 300 VA 300 VA

No-load voltage (app. x factor) 1.10 1.10 1.10 1.10 1.10 1.10

Efficiency 84.0 % 84.0 % 86.0 % 86.0 % 86.0 % 86.0 %

Standards

Classification

Control- and safety isolating transformer

Control- and isolating transformer

Control- and safety isolating transformer

Control- and isolating transformer

Control- and safety isolating transformer

Control- and isolating transformer

Approvals

Approvals cURus, ENEC 10 (VDE) cURus, ENEC 10 (VDE) cURus, ENEC 10 (VDE) cURus, ENEC 10 (VDE) cURus, ENEC 10 (VDE) cURus, ENEC 10 (VDE)

Environment

Ambient temperature max. 40 °C 40 °C 40 °C 40 °C 40 °C 40 °C

Type of cooling self-cooling self-cooling self-cooling self-cooling self-cooling self-cooling

Safety and protection

Type

Open type Open type Open type Open type Open type Open type

Insulation class

VDE=B, UL=class 105 VDE=B, UL=class 105 VDE=B, UL=class 105 VDE=B, UL=class 105 VDE=B, UL=class 105 VDE=B, UL=class 105

Protection index

IP 00 IP 00 IP 00 IP 00 IP 00 IP 00

Safety class (prepared)

I I I I I I

Short circuit strength

non-short-circuit proof non-short-circuit proof non-short-circuit proof non-short-circuit proof non-short-circuit proof non-short-circuit proof

PRI Fusing recommendation by circuit breaker with tripping characteristic type 20 x Irated related to set)

Setting range 230 ±20 Vac 0.25 - 0.40 A 0.25 - 0.40 A 0.40 - 0.63 A 0.40 - 0.63 A 0.63 - 1.00 A 0.63 - 1.00 A

Setting value 230 ±20 Vac 0.30 A 0.30 A 0.53 A 0.53 A 0.66 A 0.66 A

Setting range 400 ±20 Vac 0.16 - 0.25 A 0.16 - 0.25 A 0.25 - 0.40 A 0.25 - 0.40 A 0.40 - 0.63 A 0.25 - 0.40 A

Setting value 400 ±20 Vac 0.20 A 0.20 A 0.31 A 0.31 A 0.38 A 0.38 A

Setting range 460 ±20 Vac 0.16 - 0.25 A 0.16 - 0.25 A 0.25 - 0.40 A 0.25 - 0.40 A 0.25 - 0.40 A 0.25 - 0.40 A

Setting value 460 ±20 Vac 0.17 A 0.17 A 0.27 A 0.27 A 0.33 A 0.33 A

Setting range 520 ±20 Vac 0.10 - 0.16 A 0.10 - 0.16 A 0.16 - 0.25 A 0.16 - 0.25 A 0.25 - 0.40 A 0.25 - 0.40 A

Setting value 520 ±20 Vac 0.15 A 0.15 A 0.24 A 0.24 A 0.30 A 0.30 A

Order numbers

Order Number STU 63/24 STU 63/2x115 STU 100/24 STU 100/2x115 STU 130/24 STU 130/2x115

Transformers

Control transformers

Universal control- and safety isolatingresp. isolating transformer

STU

General Data

Rated input voltage 210 - 540 Vac

Rated output voltage 24 - 230 Vac

Rated power 63 - 2500 VA

Insulation class B

Maximum ambient temperature 40 °C

Efficiency up to 95 %

Degree of protection IP 00

Advantages

Universal input voltages 210 to 540 Vac

Very good switch-on behaviour thanks to reduced starting currents

High performance for the volume thanks to compact design

Very good corrosion protection and low noise thanks to vacuum impregnation

Contact protected screw connection terminals complying with UVV BGV A3

Simple mounting thanks to robust metal footplate with oval slots

Applications

As a control transformer for the electrical isolation of the input and output sides.The construction of the transformer to supply control systems according to VDE 0113 is designed.

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 safety isolating 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.

Sample application

Standards 2 | " Z

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 Teil 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 W J w Z

ENEC 10 (VDE), UL 5085-1/-2, CSA 22.2 No.66

1.2

5.1

1.3

2.1

2.2

3.1

3.2

3.3

5.2

4.0