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Improve the network.... The REX 521 combined with the KEVCD Sensors will improve your network with beneficial extra features. Content. 1. A solution with no saturation2. Ensures accuracy at high current3. Gives savings in engineering time4. Results in savings in material and work5. Ensures improvements in human safety.
 
                
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1. Much more than protection REX 521 
Feeder Protection Relay
and KEVCD Sensor Technology 
2. Improve the network... The REX 521 combined with the KEVCD Sensors will improve your network with beneficial extra features 
3. Content 1. A solution with no saturation
2. Ensures accuracy at high current
3. Gives savings in engineering time
4. Results in savings in material and  work
5. Ensures improvements in human safety -accuracy at high current enables measurements of real short circuit values.
- linear temperature reduces the need for cooling aggregates in the swithcgear. Operating range is xxx -xxx-accuracy at high current enables measurements of real short circuit values.
- linear temperature reduces the need for cooling aggregates in the swithcgear. Operating range is xxx -xxx 
4. Solution with no saturation 
5. Solution with no saturation 
6. Improved Accuracy 
7. Less engineering With sensors you can considerably save
engineering time and improve your efficiency 
8. Improve efficiency No need for neither AFL nor burden calculations.
Only a few types of sensors are needed.
Cables are included in the delivery 
9. Savings in project lead times Universal and standardised
sensor types reduce the need 
for detailed planning and 
therefore, can shorten project 
delivery times! 
10. Savings in material and installation With sensors you can save material 
costs and reduce the risk of possible 
human errors!
 
11. Secondary wiring, the conventional way - maximum length for cabling is 10 meters.
- 5, 6.5, 7.5 meter standard cable length.
- in practice the secondary wiring is removed.
Lets have a look on what is needed for CTs and VTs.- maximum length for cabling is 10 meters.
- 5, 6.5, 7.5 meter standard cable length.
- in practice the secondary wiring is removed.
Lets have a look on what is needed for CTs and VTs. 
12. Savings in material and installation Mounting equipment needed for CTs:
- 3 Current Transformer
- 14 Terminal blocks
- 4 Bundles ( 26 cables)
- mounting material
 - calculations based on typical swithcgear- calculations based on typical swithcgear 
13. Savings in material and installation Mounting equipment needed for VTs:
- 3 Voltage Transformers
- 18 Terminal blocks 
- 5 Bundles ( 26 cables)
- Ferro resonance resistor
- mounting material - calculations based on typical swithcgear- calculations based on typical swithcgear 
14. All you need with sensors is... - maximum length for cabling is 10 meters.
- 5, 6.5, 7.5 meter standard cable length, are standard parts of the delivery.
- in practice the secondary wiring is removed.
Lets have a look on what is needed for CTs and VTs.- maximum length for cabling is 10 meters.
- 5, 6.5, 7.5 meter standard cable length, are standard parts of the delivery.
- in practice the secondary wiring is removed.
Lets have a look on what is needed for CTs and VTs. 
15. Savings in material and installation... Improve efficiency through 
savings in material cost,
installation time and
shortened project lead times ! - calculations based on typical swithcgear- calculations based on typical swithcgear 
16. Personal safety during installation  Improve the safety of your personnel
 
With sensors you reduce the risk of
short circuits in the switchgear
during installation and  maintenance Jnnitetaso 150mV, max 10VJnnitetaso 150mV, max 10V 
17. Local presence  We are wherever You are! 
18. Delivery and Support Local presence in over 40
countries provides you with
 timely and reliable support 
whenever needed  
19. Ordering Clear specifications for ordering
 will make it easy for you to 
always find the right solution 
20. Ordering When ordering REX 521 protection relays, specify the following:
 Order number
 Quantity
 Additional language 
21. Ordering Very easy and simple ordering   
22. Conclusion - Improve efficiency through fast engineering and prevent accidents from happening
- Implementation time is reduced thanks to easy installation
- Personal safety is ensured
- Engineering time is reduced thanks to standardised solutions
- Timely and local support is at your service
- Ordering is easy 
23. In a nutshell... You do not only get
operational reliability