Seg WI Series Manual
Ct powered time overcurrent and earth current relay
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Summary of Contents for Seg WI Series
- Page 1 MANUAL WI Line PROTECTION TECHNOLOGY MADE SIMPLE WIC1 CT POWERED TIME OVERCURRENT AND EARTH CURRENT RELAY CT POWERED TIME OVERCURRENT AND EARTH CURRENT RELAY Original document English Revision: M...
- Page 2 SEG Electronics Information provided by is believed to be correct and reliable. SEG Electronics However, no responsibility is assumed by unless otherwise expressly undertaken. © SEG Electronics 1994–2020 DOK-TD-WIC1E, Rev. M...
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Page 3: Table Of Contents
GmbH Technical Manual WIC1 SEG Electronics Contents Comments on the manual ....................5 Information Concerning Liability and Warranty ..................... 5 IMPORTANT DEFINITIONS ......................... 6 Electrostatic Discharge Awareness ......................7 Introduction ........................8 How to use this instruction ..........................8 Introductory remarks on the WIC1 ........................ 8 Product description ............................ - Page 4 GmbH SEG Electronics Technical Manual WIC1 5.11 Selection of the CT transformation voltage ratio ..................40 5.12 Adjustment instruction for inverse characteristic ..................41 Commissioning and Maintenance ................. 43 6.1.1 Important note ............................43 Accessories for commissioning work ......................43 Criteria to be taken into account for protection devices fed by CTs ............
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Page 5: Comments On The Manual
(provided by evidence). 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. -
Page 6: Important Definitions
GmbH SEG Electronics Technical Manual WIC1 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. -
Page 7: Electrostatic Discharge Awareness
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. -
Page 8: Introduction
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. -
Page 9: Product Description
GmbH Technical Manual WIC1 SEG Electronics 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. -
Page 10: Handling, Installation And Outside Dimensions
GmbH SEG Electronics Technical Manual WIC1 3. Handling, Installation and Outside Dimensions 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. -
Page 11: Outside Dimensions
GmbH Technical Manual WIC1 SEG Electronics Outside dimensions All WIC1 types are of standardized design. Weight WIC1: 700g Dimensions: (Width x Height x Depth) 125x170x40mm Connection Diagram for WIC1 gn/ge gn/ge gn/ge Schauzeichen Flag indicator Energiearme / low energy Auslösespule / tripping... -
Page 12: Connection Diagram For The Flag Indicator Wi-Sz
GmbH SEG Electronics Technical Manual WIC1 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 DOK-TD-WIC1E, Rev. M... -
Page 13: Operating Instructions
GmbH Technical Manual WIC1 SEG Electronics 4. Operating instructions 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. -
Page 14: User Interface
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... -
Page 15: Wic1-4
GmbH Technical Manual WIC1 SEG Electronics 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. -
Page 16: Wic1-2
GmbH SEG Electronics Technical Manual WIC1 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. -
Page 17: Wic1-3
GmbH Technical Manual WIC1 SEG Electronics 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. -
Page 18: Cts For The Wic1
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. -
Page 19: Technical Data, Characteristics And Features
GmbH Technical Manual WIC1 SEG Electronics 5. Technical Data, Characteristics and Features 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. -
Page 20: Phase Time Over Current Protection
GmbH SEG Electronics Technical Manual WIC1 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>... - Page 21 GmbH Technical Manual WIC1 SEG Electronics For relay versions WIC1-2 and WIC1-3 the adjustment of values is done according to the tables listed below: Characteristic curve = HEX-Switch 2/DIP-Switch 1 (5 - 6) DIP 1-5 OFF ON OFF ON OFF ON OFF ON...
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Page 22: Earth Current Protection
GmbH SEG Electronics Technical Manual WIC1 5.1.3 Earth current protection Current Internal calculated cumulative current formation 0.2 to 2.5 x IS in steps of 0.05 x IS E> when adjusting via the interface for the WIC1-1 Tripping time 0.1s to 20s in steps of 0.01 when adjusting via IE>... -
Page 23: Default Settings
GmbH Technical Manual WIC1 SEG Electronics Default Settings All WIC1 relay versions are set in our works at the smallest possible setting values. Is = smallest possible rated current (W1=8, W2=16A, W3=32A, W4=64A, W5=128A, W6=256A) Characteristic: Definite Time I> = 0.9 x In tI>... -
Page 24: Routine Safety Check
GmbH SEG Electronics Technical Manual WIC1 Routine safety check In case of misadjustment of the relay, e.g. selection of non-assigned switch positions, the relay operates with the following setting values. = upper rated CT current Characteristic = DEFT I> Deactivated (Exit) 0.04 s... -
Page 25: Communication
For connection to the USB interface of a PC a WIC1-PC3 adapter is needed. Through these adapters the galvanic isolation between protection device and the PC is reached and it supplies the WIC1 with the necessary energy. For communication a proprietary SEG Electronics GmbH protocol is used. SEG Electronics GmbH WIC1PC3 Figure 5.1: WIC1, WIC1PC2 and Notebook... -
Page 26: Inputs And Outputs
GmbH SEG Electronics Technical Manual WIC1 Inputs and outputs The terminals for connection of the CT, the tripping coil of the external trip input as well as the flag indicator output are provided at the left side of the WIC1. Dependent on the relay type either screw-type terminals or screw-type plug-in terminals in 4-block arrangement are used. -
Page 27: Impulse Output For The Flag Indicator
GmbH Technical Manual WIC1 SEG Electronics 5.6.4 Impulse output for the flag indicator The energy-low tripping coil of the flag indicator is connected to terminals FI+ and FI-- of the second terminal block. The energy is provided by a capacitor store integrated in the protection relay. Length of the trip impulse is 50ms;... -
Page 28: Technical Data
GmbH SEG Electronics Technical Manual WIC1 Technical Data 5.7.1 Common Data Frequency: 45 Hz to 65 Hz Nominal: 50/60 Hz Thermal load capacity: Permanently: 2.5 x highest rated CT current 25 kA CT primary current 20 kA CT primary current Dynamic load capacity: 62.5 kA CT primary current... -
Page 29: Insulation Voltage Withstand
GmbH Technical Manual WIC1 SEG Electronics 5.7.4 Insulation voltage withstand Test of withstand alternating voltage for 1 min: IEC 60255-5 2.5 kV Test of lightning surge voltage 1.2/50 µs, 0.5 J IEC 60255-5 5 kV 5.7.5 EMC Interference immunity against discharges of static electricity... -
Page 30: Ambient Conditions
GmbH SEG Electronics Technical Manual WIC1 5.7.6 Ambient conditions Vibration and continuous vibration test DIN EN 60255-21-1 [05/96] 1/2 gn Class 2 Shock and continuous shock test DIN EN 60255-21-2 [05/96] 10/20 gn Class 2 Earthquake test DIN EN 60255-21-3 [11/95]... -
Page 31: Outside Dimension Of Cts
GmbH Technical Manual WIC1 SEG Electronics 5.7.7 Outside dimension of CTs The structural forms of the CTs depend on the switchboard construction, i.e. they are in compliance with specific customer needs. We have various standard designs. For further information please contact your sales partner. - Page 32 GmbH SEG Electronics Technical Manual WIC1 Type: WIC1W6AS1 Figure 5.4: Type WIC1W6AS1 as panel mounting Figure 5.5: Type WIC1-WxH1 as plug on type DOK-TD-WIC1E, Rev. M...
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Page 33: Characteristics And Times
GmbH Technical Manual WIC1 SEG Electronics Characteristics and times 5.8.1 Characteristic curves 1000 10.0 t[s] 0.05 5 6 7 8 910 Multiples of pick up setting * Figure 5.5: Normal Inverse *Multiples of pick up setting = Is * I>... - Page 34 GmbH SEG Electronics Technical Manual WIC1 10000 1000 t[s] 10.0 0.05 0.05 0.01 5 6 7 8 910 Multiples of pick up setting * Figure 55.7: Extremely Inverse *Multiples of pick up setting = Is * I> I> I> I> I>...
- Page 35 GmbH Technical Manual WIC1 SEG Electronics 10000 1000 t[s] 10.0 0.05 0.05 5 6 7 8 910 Multiples of pick up setting * Figure 5.9: Long time inverse *Multiples of pick up setting = Is * I> 10000 1000 t[s] 10.0...
- Page 36 GmbH SEG Electronics Technical Manual WIC1 10.0 t[s] 0.05 5 6 7 8 910 Multiples of pick up setting * Figure 5.2: RI-Inverse *Multiples of pick up setting = 100000 10000 1000 t[s] 10.0 0.01 5 6 7 8 910 Multiples of pick up setting * Figure 5.3: FR-fuse...
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Page 37: Calculation Formula For Imt Characteristics
GmbH Technical Manual WIC1 SEG Electronics 5.8.2 Calculation formula for IMT characteristics Normal Inverse: 0.14 ∙ �� [ �� ] �� = 0.02 �� − 1 �� × �� �� > Very Inverse: 13.5 ∙ �� [ �� ] �� = ��... -
Page 38: Flag Indicators
GmbH SEG Electronics Technical Manual WIC1 5.8.3 Flag Indicators WI1SZ4 Technical Data 24V DC 10% Coil: - can be set electrically - can be reset mechanically Connector assignment Coil connection Core color mm² Function black 0.25 Gnd/Set black 0.25 Gnd/Set... -
Page 39: Description Of The Application
GmbH Technical Manual WIC1 SEG Electronics Description of the Application 5.10 Foreword As CT-powered protection relay the WIC1 is mainly used in MV switchboards with circuit breakers, protecting dis- tribution transformers in local and industrial networks. Due to its small size the WIC1 is very well suited for the use in compact switchboards. -
Page 40: Selection Of The Ct Transformation Voltage Ratio
GmbH SEG Electronics Technical Manual WIC1 5.11 Selection of the CT transformation voltage ratio Selection of the CT suitable for the WIC1 depends on the rated current of the transformer to be protected and is calculated acc. to the following formula:... -
Page 41: Adjustment Instruction For Inverse Characteristic
GmbH Technical Manual WIC1 SEG Electronics 5.12 Adjustment instruction for inverse characteristic In the introduction phase of the WIC1 it came to understanding problems during the adjustment of the protection re- lay, in particular when using inverse characteristics. In the following now the connections are for this described. - Page 42 GmbH SEG Electronics Technical Manual WIC1 Estimation of the tripping time at inverse characteristics The setting and estimation by the use of an inverse characteristic will be explained at the following example. Boundary condition: Operating current of the load (IS) WIC1-W3, 32 A –...
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Page 43: Commissioning And Maintenance
GmbH Technical Manual WIC1 SEG Electronics 6. Commissioning and Maintenance 6.1.1 Important note Putting into operation and the relevant tests should only be carried out by skilled personnel. We do not accept any liability for damage caused by improper handling of the protection system, or of the primary side of the equipment. -
Page 44: Criteria To Be Taken Into Account For Protection Devices Fed By Cts
GmbH SEG Electronics Technical Manual WIC1 Criteria to be taken into account for protection devices fed by CTs With this kind of current supply it has to be taken into account that the CT has to feed more power than this is the case for protection devices with an additional aux. -
Page 45: Selection Of The Secondary Test System
GmbH Technical Manual WIC1 SEG Electronics Selection of the secondary test system When selecting the secondary test system the following particulars should be taken into account. Secondary test system to be used as power source. Three phases for the earth current test, one phase for the phase current test (see chapter 6.7). -
Page 46: Wic1 Adjustment
GmbH SEG Electronics Technical Manual WIC1 6.6.2 WIC1 adjustment The protection parameters are to be adjusted according to chapter 4 of this instruction. The set parameters can be registered directly on the sticker affixed on the relay. Functional Test There are two methods to carry out the tests: Primary test and secondary test. -
Page 47: Test Currents
GmbH Technical Manual WIC1 SEG Electronics 6.7.1 Test Currents The transformation ratio of primary currents to secondary currents of the CTs are equally proportionate as the test current via the CD winding to the secondary current. This means, no matter which CT type is in operation, for the secondary test always the same test values are used. -
Page 48: Switching Points For The Short-Circuit Step
GmbH SEG Electronics Technical Manual WIC1 6.7.3 Switching points for the short-circuit step DIP 1-1 DIP 1-2 OFF OFF OFF OFF OFF OFF OFF OFF DIP 1-3 OFF OFF OFF OFF OFF OFF OFF OFF DIP 1-4 OFF OFF OFF OFF OFF OFF OFF OFF HEX switch I>>... -
Page 49: Special Features For Earth Current Tests
GmbH Technical Manual WIC1 SEG Electronics Special features for earth current tests Functional description: In the WIC1 the earth current is calculated and cannot be measured. It is established from the geometrical amount of the three phase current values, more or less a numerical Holmgreen. If, for instant, a single-phase test current is impressed, the measuring value (tripping value) in the earth current path equals the current in the tested phase. -
Page 50: Test Procedure By Way Of Example
GmbH SEG Electronics Technical Manual WIC1 Test procedure by way of example When testing the WIC1, the tests of the individual equipment should be carried out from the highest setting value to the smallest one. The order ought to be: 1) short circuit I>>... - Page 51 GmbH Technical Manual WIC1 SEG Electronics Test step 3): Test of the over-current step I>: Settings: I> = 1.05 x Is tI> = EXIT I>> = 4.00 x Is tI>> = 0.10s IE> = EXIT tIE> = 0.2s Test to be carried out as described under “Test step 1”.
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Page 52: Maintenance
GmbH SEG Electronics Technical Manual WIC1 6.10 Maintenance The entire protection system WIC1 is designed for a maintenance-free period of 25 years, hence there are no spe- cific jobs necessary to be done during the operating life of the relays. Very often, a periodical check of the protec- tive adjustments is required by the end user. -
Page 53: Product-Specific Features
GmbH Technical Manual WIC1 SEG Electronics 7. Product-Specific Features Assignment of terminals The protection relay is equipped with 20 screw-type terminals, make Phoenix and 4 test sockets. The 2 different re- lay versions are defined by the kind of terminal used:... -
Page 54: Current Transformer
GmbH SEG Electronics Technical Manual WIC1 Current transformer Listed CT ranges in relation to the transformer rated currents 3.00 3.30 4.20 5.50 6.00 6.60 10.00 11.00 12.00 13.80 15.00 15.50 17.50 20.00 21.00 22.00 24.00 U[kV] 50.00 9,62 8,75 WIC1WE1AS1 75.00... -
Page 55: Annex
GmbH Technical Manual WIC1 SEG Electronics 8. Annex Dimensional drawing relay Figure 8.1: Dimensional drawing Dimensional drawing flag indicator Figure 88.2: Flag indicator WI1SZ4 / WI1SZ5 DOK-TD-WIC1E, Rev. M... -
Page 56: Order Form
GmbH SEG Electronics Technical Manual WIC1 Order form Multi characteristic time over current relay WIC1 3-phase current measuring I>;I>> self powered – parameter setting via serial interface – parameter setting via DIP switches – parameter setting via HEX switches – Parameter setting via interface, with LED and second operator interface Connection mode –... -
Page 57: Commissioning Form
GmbH Technical Manual WIC1 SEG Electronics Commissioning form List of adjustments for WIC1 Project: Order No.: Functional group: Location: Component Identification: Relay Function: Date: Parameter Setting Default Actual Function Unit Setting Setting CT Type Rated CT current Char Trip characteristic DEFT I>... - Page 58 WI Line www.SEGelectronics.de 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, SEG Electronics GmbH assumes no responsibility unless otherwise expressly undertaken.
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