Protective means are taken outside the equipment either the
fixed installation between the fixed installation and the equipment limit transient
overvoltages the specific level.e.
The rated surge voltage must selected from Table F.2 µs
WAGO Rail-Mount Terminal Block Systems
Technical Information
Electrical Tests (continued)
Tests and Testing Procedures per IEC/EN Standards (continued)
• Insulation Parameters per IEC/EN 60664-1
Clearances, Rated Surge Voltages, Over-
voltage Categories, Pollution Degrees
Surge voltages (Table are decisive factor
in determining clearances.com
%
100
90
50
30
0
û
u
T
T2 µs
T1 =1., stationary
motors with permanent connection the fixed installation.2/50 per 60060-1/VDE 0432-1
Clearances and Creepage Distances
The following generally applies:
The equipment specification contains data
for the measurement clearances and
creepage distances, refers the data
contained the new revised edition the
basic standard DIN 60664-1/VDE 0110-1.
• Equipment overvoltage category III part the fixed electrical installations and other
equipment where higher degree availability expected.2.
This standard contains new clearances and
creepage distances compliance with insu-
lation coordination requirements.
4)
See 4.
The basis forms the overvoltage category,
i.2/50 per IEC 60060-1/VDE 0432-1
Nominal voltage of
the power supply system1)
(mains) per IEC 600383)
Conductor-to-neutral
voltage,
derived from the
nominal or
DC voltage and
including:
Rated surge voltage2)
Overvoltage category4)
Three-phase
V
Single-phase
V
V I
V
II
V
III
V
IV
V
50 330 500 800 1500
100 500 800 1500 2500
120 240 1505)
800 1500 2500 4000
230 400 277 480 300 1500 2500 4000 6000
400 690 600 2500 4000 6000 8000
1000 1000 4000 6000 8000 12000
1)
See Annex for application existing different low-voltage mains and their nominal voltages.
In ungrounded installations, installations
where the conductor not grounded, the
voltage between conductors applicable in
the same way conductor voltage to
ground.g.
Note: Examples such equipment are distribution boards, circuit breakers, wiring systems
(IEV 826-16-08, including cables, bus bars, junction boxes, switches, socket outlets) the
fixed installation and equipment for industrial use and other equipment, e.1 Rated Surge Voltage for Equipment Energized Directly from the Low-Voltage
Mains (DIN 60664-1/VDE 0110-1)
Voltage Curve: 1.
3)
The mark indicates 3-phase, 4-conductor system.
5)
The nominal voltages for single-phase systems Japan are 100 100 200 The value for the rated impulse
voltage is, however, derived from the voltage gaps conductor-to-neutral for voltage level 150 (see Annex B).3., the allocation the equipment the
expected overvoltage, and the conduc-
tor-ground voltage derived from the nominal
mains voltage installations with grounded
Y (star) point.
• Equipment overvoltage category connected the fixed electrical installations
of buildings.
The nominal supply voltage and the corresponding rated impulse voltage values apply for grounded and ungrounded
circuits. The lower value the conductor-to-neutral voltage, while the
higher value the conductor-to-conductor voltage. Where only one value indicated, refers 3-phase, 3-con-
ductor systems and specifies the conductor-to-conductor voltage.
Table F.
Overvoltage Categories for Electrical Equipment:
A specific overvoltage category must defined the basis the following, general
description:
• Equipment overvoltage category intended connected the fixed electrical
installations buildings.3.
This standard based IEC 60604-1.
2)
Equipment with these rated impulse voltage levels can used installations complying with IEC 60364-4-443.
Voltage pulse: 1.
Note: Examples such equipment are household appliances, portable tools and similar
loads.
Note: Examples include electricity meters, primary overcurrent protection devices and rip-
ple control units.2 for explanation the overvoltage categories.wago.1 corresponding the overvoltage
category specified and the rated voltage the equipment.
.14
www. That is, the
insulation parameters equipment are
assigned to:
• the anticipated surge voltages
• the parameters the protection device
against impulse voltage
• the anticipated environmental conditions
and the protection measures against pollu-
tion.
• Equipment overvoltage category for use near the feed-in electrical building
installations upstream the main distribution board the direction the network
