5. Reference book on basic parameters and types of surge arresters on the example of the LEUTRON element base

Design of the arrester Voltage protection level
< 4000 V < 2500 V < 1500 V < 1000 V
Surge arresters of class I and I / II / III
Multi stage surge spark gap PowerPro B 50kA     PowerPro BCD 25kA
Scheme: 2 spark gaps + voltage variable resistor IsoPro B 25kA
IsoPro B 60kA
Iso BC 25kA
IsoPro BC 60kA
   
Surge arrester N-PE of class I
Spark gap (voltage suppressor N-PE) SumPro B      
Arresters of class II
2-pole, 2 voltage variable resistors + spark gap     EnerPro C  
One-pole, voltage-variable resistor     EnerPro C S  
2-pole, 2 voltage variable resistors + 2 spark gaps     EnerPro C TN  
3-pole, 3 voltage variable resistors + 3 spark gaps     EnerPro C TNC  
4-pole, 4 voltage variable resistors + 4 spark gaps     EnerPro C TNS  
Surge arrester N-PE of class II
Spark gap (voltage suppressor N-PE)     SumPro C S  
Surge arresters of class III
Single-phase (per bus)       EnerPro D... 275V
One-phase (into a socket)     EnerPro D 230V SDU  
One-phase (socket adapter)     EnerPro D Schuko  
Having added to the indicated  notions of arresters FM symbol we will get identification of arrester with clamps for fault signalling

5.1.  Modular schemes of surge arresters of class I with different protection levels

Series PowerPro

Type of network General aspect Voltage protection level
< 4000 V
(class I)
< 2500 V
(Class I/II)
< 1000 V
(class I/ II/ III)
One-phase 
TN and TT

(width of module 4)
One-phase  TN and TT PP B TN 50/100kA
(item no. LE-381-210)
 
PP B TT 1+1 50/100kA
(item no. LE-381-130)
 
PP BC TN 25/50kA
(item no. LE-381-212)
 
PP BC TT 1+1 25/50kA
(item no. LE-381-132)
 
PP BCD TN 25/50kA
(item no. LE-381-214)
 
PP BCD TT1+1 25/50kA
(item no. LE-381-134)
 
Three-phase TN-C
(width of 6 modules)
 
Three-phase TN-C PP B TNC 50/100kA
(item no. LE-373-970)
 
PP BC TN 25/75kA
(item no. LE-373-980)
 
PP BCD TN 25/75kA
(item no. LE-373-990)
 
Three-phase TN-S
(width of 8 modules)
 
Three-phase TN-S PP B TNS 50/100kA
(item no. LE-373-940)
 
PP BC TNS 25/100kA
(item no. LE-373-950)
 
PP BCD TNS 25/100kA
(item no. LE-373-960)
 
Three-phase TT
(width of 8 modules)
 
Three-phase TT PP B TT 50/100kA
(item no. LE-373-910)
 
PP BC TT 25/75kA
(item no. LE-373-920)
 
PP BCD TT 25/75kA
(item no. LE-373-930)
 

IsoPro series

Type of network General aspect Voltage protection level
< 4000 V
(class I)
< 2500 V
(Class I/II)
< 1000 V
(class I/ II/ III)
One-phase TN
(width of module 4)
One-phase TN IP B TN 25/50kA
(item no. LE-381-236)
 
 
IP B TN 60/100kA
(item no. LE-381-232)
IP BC TN 25/50kA
(item no. LE-381-238)
 
 
IP BC TN 60/100kA

(item no. LE-381-234)
-----
One-phase TN
(width of module 4)
One-phase TN-2 IP B TT 1+1 25/50kA
(item no. LE-381-228)
 
 
IPB TT 1+1 60/100kA

(item no. LE-381-155)
IP BC TT 1+1 25/50kA
(item no. LE-381-230)
 
 
IP BC TT 1+1 60/100kA

(item no. LE-381-157)
------
Three-phase TN-C
(width of 6 modules)
Three-phase TN-C-2 IP B TNC 25/75kA
(item no. LE-381-216)
 
 
IP B TNC 60/100kA

(item no. LE-381-140)
IP BC TNC 25/75kA
(item no. LE-381-218)
 
 
IP BC TNC 60/100kA

(item no. LE-381-142)
-----
Three-phase TN-S
(width of 8 modules)
Three-phase TN-S-2 IP B TNS 25/100kA(item no. LE-381-220)
 
 
IP B TNS 60/100kA

(item no. LE-381-145)
IP BC TNS 25/100
(item no. LE-381-222)
 
 
IP BC TNS 60/100kA

(item no. LE-381-147)
-----
Three-phase TT
(width of 8 modules)
Three-phase TT-2 IP B TT 25/100kA(item no. LE-381-224)
 
 
IP B TT 60/100kA

(item no. LE-381-150)
IP BC TT 25/100
(item no. LE-381-226)
 
 
IP BC TT 60/100

(item no. LE-381-152)
-------

5.2.  Modular schemes of surge arresters of class II

EnerPro series

EPC type arresters with series arrangement
of voltage-variable resistors and spark gaps
TN network 
(one-phase)

 
TT network
(one-phase)

 
TNC network TNS network  TT network
EP C TN EP C TT 1+1 EP C TNC EP C TNS EP C TT
EP C TN
item no. LE-381-247
EP C TT 1+1
item no. LE-381-182
EP C TNC
item no. LE-381-176
EP C TNS
item no. LE-381-178
EP C TT
item no. LE-381-180
EP C S type arresters with voltage-variable resistors
EP C  S TN 275V EP C  S TT 1+1 275V EP C  S TNC 275V EP C S TNS 275V EP C S TT 275V
EP C  S TN 275V
item no. LE-381-240
EP C  S TT 1+1 275V
item no. LE-381-024
EP C  S TNC 275V
item no. LE-381-030
EP C S TNS 275V
item no. LE-381-050
EP C S TT 275V
item no. LE-381-040

5.3.  Modular schemes of surge arresters of class III

EnerPro series

EP D type arresters with series arrangement of voltage-variable resistors and spark gaps
TN network 
(one-phase)

 
TT network
(one-phase)

 
TNC network TNS network TT network
EP D TN 1+1 275 EP D TT 1+1 275 EP D TNС 275 EP D TNS 275 EP D TT 275
EP D TN 1+1 275
item no. LE-381-254
EP D TT 1+1 275
item no. LE-380-538
EP D TNС 275
item no. LE-380-524
EP D TNS 275
item no. LE-380-530
EP D TT 275
item no. LE-380-535

 


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