Seg WI Series User manual

CT POWERED TIME OVERCURRENT AND EARTH CURRENT RELAY
Revision: M
Original document
English
MANUAL
PROTECTION TECHNOLOGY
MADE SIMPLE
WIC1
CT POWERED TIME OVERCURRENT AND EARTH
CURRENT RELAY
WI Line

SEG Electronics GmbH Technical Manual WIC1
2 DOK-TD-WIC1E, Rev. M
SEG Electronics reserves the right to update any portion of this publication at any time.
Information provided by SEG Electronics is believed to be correct and reliable.
However, no responsibility is assumed by SEG Electronics unless otherwise expressly undertaken.
© SEG Electronics 1994–2020

Technical Manual WIC1 SEG Electronics GmbH
DOK-TD-WIC1E, Rev. M 3
Contents
1. Comments on the manual ................................................................................................5
1.1 Information Concerning Liability and Warranty.............................................................................................5
1.2 IMPORTANT DEFINITIONS.........................................................................................................................6
1.3 Electrostatic Discharge Awareness..............................................................................................................7
2. Introduction.......................................................................................................................8
2.1 How to use this instruction............................................................................................................................8
2.2 Introductory remarks on the WIC1................................................................................................................8
2.3 Product description.......................................................................................................................................9
3. Handling, Installation and Outside Dimensions...........................................................10
3.1 General information ....................................................................................................................................10
3.1.1 Upkeep of the relay.................................................................................................................................10
3.1.2 Storage ...................................................................................................................................................10
3.1.3 Electrostatic discharge............................................................................................................................10
3.2 Installation of the relay................................................................................................................................10
3.3 Outside dimensions ....................................................................................................................................11
3.4 Connection Diagram for WIC1....................................................................................................................11
3.5 Connection Diagram for the Flag Indicator WI-SZ......................................................................................12
4. Operating instructions....................................................................................................13
4.1 General information on the WIC1...............................................................................................................13
4.2 User interface..............................................................................................................................................14
4.2.1 WIC1-1....................................................................................................................................................14
4.2.2 WIC1-4....................................................................................................................................................15
4.2.3 WIC1-2....................................................................................................................................................16
4.2.4 WIC1-3....................................................................................................................................................17
4.3 CTs for the WIC1........................................................................................................................................18
5. Technical Data, Characteristics and Features..............................................................19
5.1 Protective functions.....................................................................................................................................19
5.1.1 Minimal operating current and rated primary current..............................................................................19
5.1.2 Phase time over current protection.........................................................................................................20
5.1.3 Earth current protection ..........................................................................................................................22
5.2 Default Settings...........................................................................................................................................23
5.3 Routine safety check ..................................................................................................................................24
5.4 Fault value memory ....................................................................................................................................24
5.5 Communication...........................................................................................................................................25
5.5.1 Communication via PC adapter..............................................................................................................25
5.5.2 WIC1PC2 adapter...................................................................................................................................25
5.5.3 WIC1PC3 Adapter ..................................................................................................................................25
5.6 Inputs and outputs ......................................................................................................................................26
5.6.1 Remote trip input*...................................................................................................................................26
5.6.2 Impulse output for the tripping coil..........................................................................................................26
5.6.3 Earthing...................................................................................................................................................26
5.6.4 Impulse output for the flag indicator........................................................................................................27
5.6.5 Measuring inputs for the CTs..................................................................................................................27
5.7 Technical Data............................................................................................................................................28
5.7.1 Common Data.........................................................................................................................................28
5.7.2 Environmental Conditions.......................................................................................................................28
5.7.3 Accuracy .................................................................................................................................................28
5.7.4 Insulation voltage withstand....................................................................................................................29
5.7.5 EMC........................................................................................................................................................29
5.7.6 Ambient conditions..................................................................................................................................30
5.7.7 Outside dimension of CTs ......................................................................................................................31
5.8 Characteristics and times ...........................................................................................................................33
5.8.1 Characteristic curves ..............................................................................................................................33
5.8.2 Calculation formula for IMT characteristics.............................................................................................37
5.8.3 Flag Indicators ........................................................................................................................................38
5.9 Description of the Application .....................................................................................................................39
5.10 Foreword.....................................................................................................................................................39

SEG Electronics GmbH Technical Manual WIC1
4 DOK-TD-WIC1E, Rev. M
5.11 Selection of the CT transformation voltage ratio ........................................................................................40
5.12 Adjustment instruction for inverse characteristic ........................................................................................41
6. Commissioning and Maintenance.................................................................................43
6.1.1 Important note.........................................................................................................................................43
6.2 Accessories for commissioning work..........................................................................................................43
6.3 Criteria to be taken into account for protection devices fed by CTs...........................................................44
6.4 Special features for the WIC1 test..............................................................................................................44
6.5 Selection of the secondary test system......................................................................................................45
6.6 Checks during commissioning....................................................................................................................45
6.6.1 Wiring checks..........................................................................................................................................45
6.6.2 WIC1 adjustment ....................................................................................................................................46
6.7 Functional Test ...........................................................................................................................................46
6.7.1 Test Currents ..........................................................................................................................................47
6.7.2 Switching points for the overcurrent steps..............................................................................................47
6.7.3 Switching points for the short-circuit step...............................................................................................48
6.8 Special features for earth current tests.......................................................................................................49
6.8.1 Switching points for the earth current step .............................................................................................49
6.9 Test procedure by way of example.............................................................................................................50
6.10 Maintenance ...............................................................................................................................................52
6.10.1 Faults ..................................................................................................................................................52
6.10.2 Repair work.........................................................................................................................................52
7. Product-Specific Features..............................................................................................53
7.1 Assignment of terminals .............................................................................................................................53
7.1.1 Earthing...................................................................................................................................................53
7.2 Current transformer.....................................................................................................................................54
8. Annex...............................................................................................................................55
8.1 Dimensional drawing relay..........................................................................................................................55
8.2 Dimensional drawing flag indicator.............................................................................................................55
8.3 Order form...................................................................................................................................................56
8.4 Commissioning form...................................................................................................................................57

Technical Manual WIC1 SEG Electronics GmbH
DOK-TD-WIC1E, Rev. M 5
1.Comments on the manual
This manual explains in general the tasks of device planning, parameter setting, installation, commissioning, opera-
tion and maintenance of the WIC1 device.
The manual serves as working basis for:
Engineers in the protection field,
commissioning engineers,
people dealing with setting, testing and maintenance of protection and control devices,
as well as trained personnel for electrical installations and power stations.
All functions concerning the type code will be defined. Should there be a description of any functions, parameters
or inputs/outputs which do not apply to the device in use, please ignore that information.
All details and references are explained to the best of our knowledge and are based on our experience and obser-
vations.
This manual describes the (optionally) full featured versions of the devices.
All technical information and data included in this manual reflect their state at the time this document was issued.
We reserve the right to carry out technical modifications in line with further development without changing this
manual and without previous notice. Hence no claim can be brought based on the information and descriptions this
manual includes.
Text, graphic and formulae do not always apply to the actual delivery scope. The drawings and graphics are not
true to scale. We do not accept any liability for damage and operational failures caused by operating errors or dis-
regarding the directions of this manual.
No part of this manual is allowed to be reproduced or passed on to others in any form, unless SEG Electronics GmbH
have approved in writing.
This user manual is part of the delivery scope when purchasing the device. In case the device is passed on (sold)
to a third party, the manual has to be handed over as well.
Any repair work carried out on the device requires skilled and competent personnel who need to be well aware es-
pecially of the local safety regulations and have the necessary experience for working on electronic protection de-
vices and power installations (provided by evidence).
1.1 Information Concerning Liability and Warranty
SEG Electronics does not accept any liability for damage resulting from conversions or changes carried out on the
device or planning (projecting) work, parameter setting or adjustment changes done by the customer.
The warranty expires after a device has been opened by others than SEG Electronics specialists.
Warranty and liability conditions stated in SEG Electronics General Terms and Conditions are not supplemented by
the above mentioned explanations.

SEG Electronics GmbH Technical Manual WIC1
6 DOK-TD-WIC1E, Rev. M
1.2 IMPORTANT DEFINITIONS
The signal definitions shown below serve the safety of life and limb as well as for the appropriate operating life of
the device.
DANGER indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION, used with the safety alert symbol, indicates a hazardous
situation which, if not avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to personal injury.
CAUTION, without the safety alert symbol, is used to address practices not
related to personal injury.

Technical Manual WIC1 SEG Electronics GmbH
DOK-TD-WIC1E, Rev. M 7
1.3 Electrostatic Discharge Awareness
All electronic equipment is electro static-sensitive, some components more
than others. To protect these components from electro static damage, you
must take special precautions to minimize or eliminate electrostatic
discharges.
Follow these precautions when working with or near the control.
1. Before doing maintenance on the electronic control, discharge the
static electricity on your body to ground by touching and holding a
grounded metal object (pipes, cabinets, equipment, etc.).
2. Avoid the build-up of static electricity on your body by not wearing
clothing made of synthetic materials. Wear cotton or cotton-blend
materials as much as possible because these do not store static
electric charges as much as synthetics.
3. Keep plastic, vinyl, and Styrofoam materials (such as plastic or
Styrofoam cups, cup holders, cigarette packages, cellophane
wrappers, vinyl books or folders, plastic bottles, and plastic ash trays)
away from the control, the modules, and the work area as much as
possible.
SEG Electronics GmbH reserves the right to update any portion of this publication at any time. Information
provided by SEG Electronics GmbH is believed to be correct and reliable. However, no responsibility is as-
sumed by SEG Electronics GmbH unless otherwise expressly undertaken.
© SEG Electronics GmbH 1994–2020. All Rights Reserved

SEG Electronics GmbH Technical Manual WIC1
8 DOK-TD-WIC1E, Rev. M
2.Introduction
The protection relays of the WI-LINE are offering time over current protective functions and optional earth fault pro-
tective functions in the well-proven technique for CT powered protection relays. As combination of a compact pro-
tection relay and related core-type transformer, the WIC1 system was especially developed for compact MV
switchboards with circuit breakers.
2.1 How to use this instruction
In this instruction the technical description of all WIC1 versions is included. The user is given a comprehensive in-
sight into the various applications, the selection, installation, setting of parameters and putting into operation of the
WIC1.
This instruction is divided into the following sections:
Chapter 1; Comments on the manual (this chapter)
Chapter 2; Introduction
Chapter 3; Handling, Installation and Outside Dimensions
Chapter 4; Operating instructions
Chapter 5; Technical Data, Characteristics and Features
Chapter 6; Commissioning and Maintenance
Chapter 7; Product-Specific Features
Chapter 8; Annex; Dimensional drawing and flag indicator, Order form and commissioning
form
OUT-OF-DATE PUBLICATION
This publication may have been revised or updated since this copy was pro-
duced. To verify that you have the latest revision, be sure to check the SEG
Electronics GmbH documentation website:
http://www.segelectronics.de
If your publication is not there, please contact your customer service representa-
tive to get the latest copy.
2.2 Introductory remarks on the WIC1
The requirements on MS distribution stations with circuit breakers call for a robust protection relay which is opti-
mized accordingly and an integral part of the respective switchboard. The WIC1 is a time over current relay SEG
Electronics GmbH has developed specifically for such requirements.
The WIC1 is a CT-powered protection relay with minimal space requirement which complies with the highest de-
mands on a digital protection device. Simple but safe wiring, high electromagnetic interference immunity, uncompli-
cated adjustment and the ability to scale to different power quantities of the switchboard, helping the switchgear
manufacturer to minimize costs. By developing the WIC1 we are also able to present a protective system with a
guaranteed maintenance-free period of 25 years, the same as for the switchboard.

Technical Manual WIC1 SEG Electronics GmbH
DOK-TD-WIC1E, Rev. M 9
2.3 Product description
The WIC1 is a CT-powered protection relay with inverse time and definite time protection characteristics and is
specifically designed for switchboards with CBs and small rated output currents.
Together the specific CTs and the WIC1 form a joint protective system. A low-energy coil is needed for realizing trip
of the CB.
Parameter setting can be done in different user-friendly ways. By means of casting all electronic components incl.
the housing are safely protected against climatic and mechanic influences.
In the WIC1 the following protection functions are realized:
3 phase definite time over current and short-circuit protection with variable tripping times
(ANSI 50/51)
3 phase over current protection with selectable inverse time characteristics and definite
time short-circuit current element (ANSI 50/51)
definite time earth over current protection by internal calculation (ANSI 50N/51N) –(Option)

SEG Electronics GmbH Technical Manual WIC1
10 DOK-TD-WIC1E, Rev. M
3.Handling, Installation and Outside Dimensions
3.1 General information
3.1.1 Upkeep of the relay
As a rule protection relays are of robust construction and the WIC1 in particular allows operation under extreme
environmental conditions. But despite these facts, the WIC1 should be handled with the necessary care during in-
stallation and commissioning. Immediately after receipt of the relay it should be checked for possible damage in-
flicted during transportation. Any transport damage has to be notified to the transport firm handling the consign-
ment.
Those relays which are not installed immediately should be stored in their original package (styrofoam).
3.1.2 Storage
If the relay is not used directly it has to be stored in its original packing. Permissible temperatures during storing are
-40°C up to +85°C. The storage place should be dry.
3.1.3 Electrostatic discharge
The electronic components used in the relay react very sensitive to electrostatic discharge but they are absolute
safely placed inside the plastic housing. Additionally all electronic components are well protected by means of cast-
ing. Hence it is practical impossible that components are damaged by ESD.
There are no setting or calibrating appliances inside the housing, which would call for opening the device by the
user. The housing is hermetically sealed and cannot be opened without causing damage.
3.2 Installation of the relay
By using the three 7mm ø drill holes, the relay is directly mounted onto the mounting plate. Detailed drawing with
all measurements can be found in the Appendix.

Technical Manual WIC1 SEG Electronics GmbH
DOK-TD-WIC1E, Rev. M 11
3.3 Outside dimensions
All WIC1 types are of standardized design.
Weight WIC1: 700g
Dimensions: (Width x Height x Depth) 125x170x40mm
3.4 Connection Diagram for WIC1
1
2
3
gn/ge
1
2
3
gn/ge
S1
S2
C
D
S1
S2
C
D
S1
S2
C
D
WIC1
1
2
3
gn/ge
L1
L2
L3
TC+
TC-
230V
N
~
Energiearme / low energy
Auslösespule / tripping
coil
115V
PE
FI+
FI-
Schauzeichen
Flag indicator
Eingang Fernauslöser
input remote trip
Figure 3.1: Connection diagram WIC1

SEG Electronics GmbH Technical Manual WIC1
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3.5 Connection Diagram for the Flag Indicator WI-SZ
Figure 3.2: Connection diagram WI-SZ4 flag indicator
Figure 3.3: Connection diagram WI-SZ5 flag indicator

Technical Manual WIC1 SEG Electronics GmbH
DOK-TD-WIC1E, Rev. M 13
4.Operating instructions
4.1 General information on the WIC1
All available versions of the WIC1 relay are a high-tech and cost-optimized protection for MV switchboards. Specif-
ically in compact switchboards, the WIC1 protection system in combination with a circuit breaker can replace the
combination of load-break-switch with HV fuses. Thereby in particular the overload protection for the attached unit
is improved clearly.
When power distribution networks are extended more and more high powered transformers are used and here HV
fuses are inadmissible. For such applications the WIC1 protection system is an optimal replacement.
All WIC1 versions are provided with three analogue measuring inputs (3x phase current). The current measuring
inputs are specially adjusted to the CTs allocated to the WIC1 protection system. There are 6 different CT ratios
available for the protection system WIC1 which are conditional on the rated system current. The successive devel-
opment towards the application time over current protection makes the system very user friendly. Setting of param-
eters as well as reading of tripping values is done via the integrated interface. For this the user has one PC adapter
and the software “WIC-Soft2” at hand.
As an alternative to the adjustment via interface it is also possible to do this by means of DIP switches (for relay
version WIC1-2) or by HEX switches (for relay version WIC1-3).
Cumulative current formation for earth current detection is programmed in the relay. The earth current is calculated
from the three phase currents (not available in WIC1-2F).
The WIC1 is provided with an input for remote tripping to which 115 VAC or 230 VAC can be connected. Tripping is
realized via the electric impulse output after max. 1 s.
A mechanical flag indicator WI1-SZ4 can be installed for optical signaling occurrence of trip conditions.
Furthermore it is possible to signal a trip event potentially free via the flag indicator WI1-SZ5. For this purpose the
flag indicator is equipped with two changeover contacts.
For versions WIC1-2/-3 activation of the relay is signaled by a LED which is above the switches and protected by
the clear plastic cover.
In order to simplify protective tests, the WIC1 has test sockets for connection of measuring lines of a three-phase
testing device which are used for feeding the CT test winding. Through this the entire protection system (CTs, pro-
tection devices, tripping coil) incl. the wiring can be tested.

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4.2 User interface
4.2.1 WIC1-1
Pursuant to the intended maintenance-free design and for reducing cost there is no user interface with LED indica-
tors and display. The setting values of the protective functions can be recorded directly at the protection relay.
For the basic version WIC1-1 the adjustment of protective functions can only be done via the communication inter-
face which is placed above the terminal blocks at the left of the device.
The adjustment can take place by means of PC. For the short-circuit element here a separate password is needed.
The factory setting for this password is: seg
Figure 4.1: WIC1-1

Technical Manual WIC1 SEG Electronics GmbH
DOK-TD-WIC1E, Rev. M 15
4.2.2 WIC1-4
When compared to WIC1-1, the WIC1-4 provides an additional operator interface at its front panel.
The functionality is the same as for the WIC1-1.
Figure 4.2: WIC1-4
Note!
For the operating software “WIC-Soft1” a separate description is available.

SEG Electronics GmbH Technical Manual WIC1
16 DOK-TD-WIC1E, Rev. M
4.2.3 WIC1-2
For the relay version WIC1-2 the adjustment of protective functions can be done via DIP switches; there are 4 DIP
switches for binary coded setting of one protective parameter.
Because there are only 16 steps available for setting the individual protective parameters, scaling is coarser than
this is the case with parameter setting via software.
For the relay version WIC1-2 setting of parameters via interface is not possible any more, but it is possible to read-
out the stored fault values as well as the setting values of the WIC1.
The interface for this version can be found at the left of the relay and additionally above the DIP switch block.
Switch block; Switch No.
Setting parameter
1; 1-4
IS: Rated CT current
1; 5-8
Choice of characteristics
2; 1-4
I>: Pick-up value of the definite time over current element or start
value of the inverse time characteristic.
2; 5–8
tI>: Tripping time of the definite time over current element or factor
“a” of the inverse time characteristic
3; 1-4
I>>: Pick-up value of the short-circuit element
3; 5-8
tI>>: Tripping time of the short-circuit element
4; 1-4
IE>: Pick-up value of the definite time earth over current element
4; 5-8
tIE>: Tripping time of the definite time earth over current element.
Figure 4.3: WIC1-2

Technical Manual WIC1 SEG Electronics GmbH
DOK-TD-WIC1E, Rev. M 17
4.2.4 WIC1-3
For the relay version WIC1-3 the adjustment of protective functions can be done via HEX switches at the protection
relay.
Because there are only 16 steps available for setting the individual protective parameters, scaling is coarser than is
the case with parameter settings via software.
For the relay version WIC1-3 setting of parameters via interface is not possible any more, but it is possible to read-
out the stored fault values as well as the setting values of the WIC1.
The interface for this version can be found at the left of the relay and additionally above the HEX switch block.
The following parameters can be set for the relay version with integrated earth fault protection function.
Switch
Setting parameter
1
IS: Rated CT current
2
Choice of characteristics
3
I>: Pick-up value of the definite time over current element or start value of the in-
verse time characteristic
4
tI>: Tripping time of the definite time over current element or time factor “a” of the in-
verse time characteristic
5
I>>: Pick-up value of the short-circuit element
6
tI>>: Tripping time of the short-circuit element
7
IE>: Pick-up value of the definite time earth over current element
8
tIE>: Tripping time of the definite time earth over current element
If there is no earth fault function, the HEX switches 7 and 8 are not incorporated.
Figure 4.4: WIC1-3

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18 DOK-TD-WIC1E, Rev. M
4.3 CTs for the WIC1
There are different wide-range CTs for the protection system WIC1. (See also 8.3 “Order form”.)
CT Type
(Order Code)
Rated CT
current IS
Max. measurable
Short-circuit Current
Thermal Withstand
ISmin
ISmax
(20ISmax = 70ISmin)
Primary current max.:
WIC1WE1AS1
8 A
…28 A
560 A
20 kA for 3 seconds,
and
25 kA for 1 second
WIC1W2AS1
16 A
…56 A
1120 A
WIC1WE2AS1
16 A
…56 A
1120 A
WIC1W3AS1
32 A
…112 A
2240 A
WIC1W4AS1
64 A
…224 A
4480 A
WIC1W5AS1
128 A
…448 A
8960 A
WIC1W6AS1
256 A
…896 A
17920 A
The optimum CT is selected depending on the rated primary power and voltage of the system. A detailed
discussion can be found in chapter 5.11 “Selection of the CT transformation voltage ratio”.
The protection relay can be set to the respective operating current of the switchboard by parameter Is. Reference
on the calculation of the protective setting values resulting from this is made in chapter 5.9 “Description of the
Application”.
Current transformer WIC1WE1AS1, WIC1WE2AS1
In case of small values of the primary currents there are special “E”-labeled CTs available that feature a mixed core
based on MU metal and offer an optimized characteristics of transmission: WIC1WE1AS1, WIC1WE2AS1.
It is typical of self-powered protection relays such as the WIC1 that small primary currents cause a non-linear
transmission characteristic of the relay. The “E” CTs improve the accuracy of the whole system if the primary
current values are less than 20 A (WIC1WE2AS1), or less than 10 A (WIC1WE1AS1).
A worse accuracy can often be accepted for an application without earth current protection so that the
WIC1W2AS1 (i.e. without „E“) represents an inexpensive alternative.
(For the lowest range 8 –28 A, however, SEG Electronics GmbH decided for quality reasons to not offer such an
alternative.)
If a higher accuracy is needed, or in case of a required earth current protection element it is recommended to
always use an “E”-type CT (i.e. prefer WIC1WE2AS1 over WIC1W2AS1), because in the lower operation range
this CT type is more precise than the WIC1W2AS1.

Technical Manual WIC1 SEG Electronics GmbH
DOK-TD-WIC1E, Rev. M 19
5.Technical Data, Characteristics and Features
5.1 Protective functions
5.1.1 Minimal operating current and rated primary current
In order to operate reliably, the WIC1 –as all CT-powered protection relays –needs a minimal current flowing con-
stantly in one of the phases. This minimal current is the smallest rated CT current (IS) x 0.9 listed in table.
The real rated current of the operating component to be protected is adjusted by parameter IS. All further settings
at the protection relay refer to the adjusted IS. This is to be described in the following example;
Boundary condition:
Setting IS = 40 A, CT type W3, 32 to 112 A
Setting I>: 1.1 x IS = 1.1 x 40 A = 44 A
Setting I>>: 10 x IS = 10 x 40 A = 400 A
Setting IE>: 0.2 x IS = 0.2 x 40 A = 8 A
Depending on the CT type, an adjustment for relay version WIC1-1 is possible in the following scaling:
CT Type
Rated CT current
Step
WIC1WE2AS1
8 –28 A
0.1 A
WIC1WE2AS1
16 –56 A
0.2 A
WIC1W2AS1
16 –56 A
0.2 A
WIC1W3AS1
32 –112 A
0.4 A
WIC1W4AS1
64 –224 A
0.8 A
WIC1W5AS1
128 –448 A
1.6 A
WIC1W6AS1
256 –896 A
3.2 A
only for setting via serial interface
For relay versions WIC1-2 and WIC1-3 the following rated CT currents are adjustable either by DIP switches 1-4
(switch block 1) (Please note, DIP 4 is without function for the WIC1-2F) or HEX switch 1:
DIP 1-1
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
DIP 1-2
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
DIP 1-3
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
DIP 1-4
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
HEX 1
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
WIC1-W1
8
9
10
11
12
13
14
15
16
17
18
20
22
24
26
28
WIC1-W2
16
18
20
22
24
26
28
30
32
34
36
40
44
48
52
56
WIC1-W3
32
36
40
44
48
52
56
60
64
68
72
80
88
96
104
112
WIC1-W4
64
72
80
88
96
104
112
120
128
136
144
160
176
192
208
224
WIC1-W5
128
144
160
176
192
208
224
240
256
272
288
320
352
384
416
448
WIC1-W6
256
288
320
352
384
416
448
480
512
544
576
640
704
768
832
896
* All values are primary values in Ampere
Table 5.1

SEG Electronics GmbH Technical Manual WIC1
20 DOK-TD-WIC1E, Rev. M
5.1.2 Phase time over current protection
The following setting ranges and gradings apply for WIC1-1 and WIC1-4 devices. Here the parameters can only be
set via a serial interface.
Current Arithmetic averages measurement
Threshold values I> 0.9 to 2.5 x IS in steps of 0.05 x IS
when adjusting via interface
I>> 1 to 20 x IS in steps of 0.1 x IS
when adjusting via interface
Tripping time for the definite
time over current element tI> 0.04s to 300s in the following steps when adjusting via
interface
0.04s - 1s in 0.01 s steps
1s - 5s in 0.1s steps
5s - 20s in 0.5s steps
20s - 100s in 2s steps
100s - 300s in 5s steps
IMT characteristics*: Normal Inverse (N-INV)
Very Inverse (V-INV)
Extremely Inverse (E-INV)
Long Time Inverse (L-INV)
RI-Inverse (RI-INV)
Fuse characteristic of a HV fuse
Fuse characteristic of a full range fuse (FR-Fuse)
Time factor 0.05 to 10 in steps of 0.05 when adjusting via interface
Tripping times for the definite
time short-circuit element tI>> 0.04s to 3s in the following steps when adjusting via interface
0.04s - 1s in 0.01 s steps
1s - 3s in 0.02 s steps
The min. tripping time when switched on to a failure is subject to the fault current level. See
the following diagram. The diagram shows the tripping time under worst conditions like
ageing, temperature.
Im = Minimum current (chapter 4.1.1)
With the WIC1 protection system minimal tripping times of 40 ms can be achieved.
Time correction of current 0 ≤45ms
of current > Im ≥35ms
Disengaging time < 30ms
* The starting point of the characteristic should be in the area of the rated CT current , e. g. W2 = 16 –56 A. If over the parameter I> the starting
point is set higher, then the relay cut the characteristics at 20 x upper rated current.
Minimale Auslösezeiten
Minimum tripping times
10
100
1000
0 5 10 15 20
t [ms]
einphasige
Speisung /
single phase
supply
zweiphasige
Speisung /
dual phase
supply
dreiphasige
Speisung /
three phase
supply
Im
I