| 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) |
 |
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) |
 |
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) |
 |
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) |
 |
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) |
 |
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) |
 |
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) |
 |
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) |
 |
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) |
 |
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 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 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 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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"4. Surge arresters of class III"
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