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UfE ENS26, Product Description

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UfE ENS26 Product Description Download Page 7

Chapter 2

System Description

Version: A.02

Product Description ENS26

Page 7 of 20

Issue: 20.09.2005

2.3 Connections

The following connections are provided at the top edge of the ENS26:

A

B

<EINSPEISER

N

L

N

L

<NETZ

A

2 connection terminals to connect one phase and the neutral conductor
(feeding unit)

B

2 connection terminals to connect one phase and the neutral conductor
(mains)

Note

The connection of the unit is described in the Installation Manual.

Summary of Contents for ENS26

Page 1: ...ENS26 Automatic Isolation Unit Product Description Issue 09 2005...

Page 2: ...the documentation Copyright This Product Description is the copyright of UfE GmbH This manual is intended for the customers and project planner It contains instructions and information which must not...

Page 3: ...her 10 3 6 Optimised impedance measurement process 10 3 7 Automatic calibration of the impedance measurement 11 3 8 Automatic adaptation of switching thresholds to the mains power conditions 12 3 9 Au...

Page 4: ...ms It prevents uncontrolled is land effects following failure or shutdown of the public electricity supply The ENS26 complies with DIN VDE 0126 1 1 and is approved as a sub stitute for manual isolatio...

Page 5: ...mplished by two relays Each relay is specified for a switching current of 25 A The contact distance within the relay is in accordance to the overvoltage category 2 at 250 V AC The safety functions are...

Page 6: ...ored phase are pro vided in a 2 line LC display Each line can contain 16 characters B LEDs of the phase monitoring In addition to the optional LCD display the unit status and status of the monitored p...

Page 7: ...owing connections are provided at the top edge of the ENS26 A B EINSPEISER N L N L NETZ A 2 connection terminals to connect one phase and the neutral conductor feeding unit B 2 connection terminals to...

Page 8: ...s in voltage frequency impedance Note The default settings can be changed if necessary The ENS manufac turer must be informed of these requirements however prior to con figuration 3 2 Fluctuations in...

Page 9: ...the power supply If the rate of change of the frequency RoCoF exceeds 1 Hz s discon nection from the supply is also triggered 3 4 Impedance jumps The mains impedance is monitored The time dependent c...

Page 10: ...ntegrated in the ENS26 optimised impedance measurement process automatic calibration of the measured impedance change automatic adaptation of switching thresholds to frequent fluctuations and interfer...

Page 11: ...esistor in the ENS performs an automatic continuous cali bration of the impedance measurements and at the same time a continu ous automatic self test Manual calibration is no longer necessary To compl...

Page 12: ...ed to a less sensitive value the ENS26 switches off briefly in order to check whether the power supply is still available The threshold is only changed to a less sensitive value when it is recognised...

Page 13: ...tronger test signal through synchronisation This enables even higher measuring accuracy Faulty triggering is practically zero and operation is more stable The parallel connected ENS units generate a d...

Page 14: ...ation check that the ENS26 isolation unit is in a perfect condition 4 1 2 Conditions for installation The ENS26 is intended for installation on a top hat rail in an electrical cabinet or in a meter ca...

Page 15: ...position of the ENS26 so that you can see the ENS26 and its indicators LEDs and optional LCD without opening the cabinet The cut out must have the following dimensions 145 mm 73 mm X XXXXX 4 1 4 Moun...

Page 16: ...e performed by a properly qualified and authorized electrician The ENS26 must be protected by a pre fuse in the respective phase of the mains feed circuit min 6 A max 25 A Observe the circuit diagram...

Page 17: ...ss the unit The neutral con ductor MUST be connected to the ENS26 otherwise the unit may be damaged If the ENS26 is switched on and off by means of a system control unit the phase connection L of the...

Page 18: ...calibration of the impedance measurement continuous automatic self test of the isolation unit replaces the isolation unit provided by the public electricity supplier which must be permanently accessi...

Page 19: ...tive humidity non condensating Nominal current of power feeder max 25 A The unit disconnects the mains under the following defined condi tions complying with standard DIN VDE 0126 Overvoltage fast shu...

Page 20: ...Chapter 6 Technical Data Page 20 of 20 Product Description ENS26 Version A 02 Issue 20 09 2005 For your notes...

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