Woodward BU1-DC2 Manuale utente

BU1-DC2 – DC Voltage Relay

Manual BU1-DC2 (Revision A)

Woodward Manual BU1-DC2 GB

2 DOK-TD-BU1-DC2E Rev.A

Manual BU1-DC2 GB Woodward

Woodward Governor Company reserves the right to update any portion of this publication at any time. Information

provided by Woodward Governor Company is believed to be correct and reliable. However, no responsibility is as-

sumed by Woodward Governor Company unless otherwise expressly undertaken.

DOK-TD-BU1-DC2E Rev.A

Woodward Manual BU1-DC2 GB

Application

Supervision of DC voltages

Function

Unit BU1-DC2 is equipped with an over- (U>) and undervoltage supervision (U<) with separate ad-

justable pick-up values and common trip delay (t) and hysteresis (DIFF).

The DC voltage measured is constantly compared with the set reference values. Any voltage sig-

nal, which exceeds the set reference value for overvoltage, or falls below the set reference value

for undervoltage, will cause the respective relay to trip after elaps of the time delay.

Pick-up of the supervision circuit, either U> or U<, is displayed by the corresponding flashing LED.

At undervoltage tripping LED U< extinguishes. At U>-tripping LED U> is steady lit.

Technical data

rated voltage Un: 12 V or 24 V

Power consumption: 3 W

dropout to pickup ratio: dependent on the set hysteresis

dropout time: 300 ms

Minimum operating delay: 300 ms

Output relay

max. breaking capacity: ohmic 250 V AC/120 V DC

inductive 500 V AC/ 75 W DC

rated current: 5 A

making current: 20 A

System Data

regulations: VDE 0435 part 303

temperature range at

storage and operation: -25°C to 70°C

Mechanical stress:

shock: class 1 acc. to DIN IEC 255-21-2

vibration: class 1 acc. to DIN IEC 255-21-1

degree of protection

unit front: IP 40 at closed front cover

weight: approx. 0.3 kg

mounting position: any

4 DOK-TD-BU1-DC2E Rev.A

Manual BU1-DC2 GB Woodward

DOK-TD-BU1-DC2E Rev.A

Figure 1: Front plate

Unit BU1-DC2 is designed to be fastened onto a DIN-rail acc. to DIN EN 50022, same as all units

of the BASIC LINE.

The front plate of the unit is protected with a sealable transparent cover (IP40).

Please remove the transparent cover at the appropriate openings with a screw driver to adjust the

relay.

LEDs

LED U< is used to indicate trouble free operation with steady light. LEDs U> and U< indicate

pickup of the re-lay by flashing.

At undervoltage tripping LED U< extinguishes.

LED U> indicates tripping at overvoltage (steady light).

Figure 2: Dimensional drawing BU1-DC2

Woodward Manual BU1-DC2 GB

Auxiliary voltage supply

Unit BU1-DC2 needs no separate auxiliary voltage supply. The supply voltage can be formed di-

rectly from the measuring quantity.

Figure 3: Connection diagram

Figure 4: Contact positions

6 DOK-TD-BU1-DC2E Rev.A

Manual BU1-DC2 GB Woodward

Connecting terminals

The connection up to a maximum of 2 x 2.5 s mm2cross-section conductors is possible. For this

procedure the transparent cover of the unit has to be removed.

Setting ranges

U<: 0.7 - 1.1 Un

U>: 1.0 - 1.4 Un

t: 0 - 100 s

DIFF: 2 - 10 %

Order form

DC voltage relay BU1DC2

Rated voltage 12 V/DC

24 V/DC 12

DOK-TD-BU1-DC2E Rev.A

Woodward Manual BU1-DC2 GB

Woodward Kempen GmbH

Krefelder Weg 47 ⋅D – 47906 Kempen (Germany)

Postfach 10 07 55 (P.O.Box) ⋅D – 47884 Kempen (Germany)

Phone: +49 (0) 21 52 145 1

Internet

www.woodward.com

Sales

Phone: +49 (0) 21 52 145 216 or 342 ⋅Telefax: +49 (0) 21 52 145 354

e-mail: [email protected]

Service

Phone: +49 (0) 21 52 145 614 ⋅Telefax: +49 (0) 21 52 145 455

e-mail: [email protected]

8 DOK-TD-BU1-DC2E Rev.A

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