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STW20K 

12440-0702-03

 

Page

 

2 / 8 

www.ziehl.de 

  

Table of contents 

 

1

 

General Notes ......................................................................................................................................... 3

 

2

 

Display and controls .............................................................................................................................. 3

 

3

 

Application and short description ......................................................................................................... 3

 

4

 

Overview of functions ............................................................................................................................ 3

 

5

 

Connecting diagram ............................................................................................................................... 4

 

6

 

Important Information ............................................................................................................................ 4

 

7

 

Installation .............................................................................................................................................. 5

 

8

 

Commissioning....................................................................................................................................... 5

 

9

 

Detailed description ............................................................................................................................... 6

 

9.1

 

Tips:............................................................................................................................................... 6

 

10

 

Disposal .................................................................................................................................................. 6

 

11

 

Error search ............................................................................................................................................ 6

 

12

 

Technical data ........................................................................................................................................ 7

 

13

 

Housing Type K ...................................................................................................................................... 8

 

 
 

 

Summary of Contents for STW20K

Page 1: ...w ziehl de Temperature Relays and MINIKA Mains Monitoring Digital Panelmeters MINIPAN Switching Relays and Controls Measuring Transducers Grid and Plant Protection Operating Manual STW20K updated 2019 07 31 Fu STW20K 12440 0702 03 Page 1 8 www ziehl de Current Relay for AC Detection AND Evaluation 3 Transformers ...

Page 2: ...2 Display and controls 3 3 Application and short description 3 4 Overview of functions 3 5 Connecting diagram 4 6 Important Information 4 7 Installation 5 8 Commissioning 5 9 Detailed description 6 9 1 Tips 6 10 Disposal 6 11 Error search 6 12 Technical data 7 13 Housing Type K 8 ...

Page 3: ...ent in up to 3 lines with current transformers STWA1 AND circuit If there is a current in all 3 monitored lines the relay 2 change over contacts picks up If there is no current in at least one of the lines the relay releases The relay works in closed circuit current When voltage is applied to the STW the relay signals an alarm until the it has picked up Identifies power failure with 1 or 3 phase e...

Page 4: ...d the relevant security instructions for the setting up and the use of electrical units The equipment is built according to EN and checked and leave the plant according to security in perfect condition If in any case the information in the instructions manual is not sufficient please contact our company or the responsible representative To maintain this condition you must observe the safety instru...

Page 5: ...se twisted or shielded cables Attention The polarity of the current transformer output white marking on the cable must be observed only if several current transformers are connected in series to increase the sensitivity 7 Installation mount on 35 mm mounting rail according to EN 60715 wall mount with 3 x screws M4 connecting wires refer to the connection plan to prevent miss operation and malfunct...

Page 6: ...t too high current in wire too low Loop through wire several times Limit too low small loads shall not be recognized Connect a resistor 0 25 W 200 V in parallel to the current transformer STWA1 H resistor 750 Ohm enhancement by factor 2x resistor 330 Ohm enhancement by factor 4x resistor 150 Ohm enhancement by factor 10x Because of high tolerances we recommend to determine the best value by try ou...

Page 7: ...current AC 15 Ie 3 A Ue 250 V Rated operational voltage DC 13 Ie 2 A Ue 24 V DC 13 Ie 0 4 A Ue 120 V Ie 0 2 A Ue 240 V Recommended fuse NO 4 A time lag or miniature circuit breaker MCB B4 Recommended fuse NC 3 15 A time lag Test conditions EN 61010 1 Rated impulse voltage 4000 V Overvoltage category III Pollution degree 2 Rated insulation voltage Ui 300 V On period 100 EMC tests EN 61326 1 industr...

Page 8: ... AWG 22 14 Stranded wire with ferrules insulated ferrules 1 x 0 14 mm2 1 5 mm2 AWG 28 16 Stripping length Tightening Torque 8 mm 0 5 Nm Protection class housing terminals IP40 IP 20 Mounting Snap mounting on 35 mm standard rail EN60715 or M4 screws additional bar not included Mounting position any Weight app 120 g Subject to technical changes 13 Housing Type K 1 Bottom 2 Top 3 Bolt 4 Screw 5 Holes...

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