Woodward WIP1 User manual

WIP1- Self powered time overcurrent relay
Manual WIP1 (Revision F)

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 2
Woodward Governor Company reserves the right to update any portion of this publication at any time. Information provided
by Woodward Governor Company is believed to be correct and reliable. However, no responsibility is assumed by Woodward
Governor Company unless otherwise expressly undertaken.
© Woodward 1994-2013

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 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.General ...................................................................................................................... 8
3.Characteristics and Features ................................................................................... 9
4.Design ...................................................................................................................... 10
4.1Connections..................................................................................................................................... 10
4.1.1Connecting the serial Interface.................................................................................................... 14
4.1.2Analog inputs ............................................................................................................................... 15
4.1.3Control inputs............................................................................................................................... 15
4.1.4Operation outputs ........................................................................................................................ 16
4.1.5Battery.......................................................................................................................................... 17
4.1.6Trip indication .............................................................................................................................. 17
4.1.7Serial Interface............................................................................................................................. 17
5.Working Principle ................................................................................................... 18
5.1Analog circuits ................................................................................................................................. 18
5.2Digital circuits................................................................................................................................... 18
5.3Battery buffer ................................................................................................................................... 19
5.3.1Additional power part ................................................................................................................... 19
5.3.2Transformer Power Supply .......................................................................................................... 19
5.3.3Important note for the battery function......................................................................................... 19
5.4Indicating and operating elements................................................................................................... 20
5.4.1Front plate.................................................................................................................................... 20
5.4.2Display ......................................................................................................................................... 20
5.4.3LED .............................................................................................................................................. 20
5.5Function push buttons ..................................................................................................................... 20
5.6Opening the front cover ................................................................................................................... 21
5.7Requirements for the main C.T.s..................................................................................................... 22
5.7.1Determining the maximum coil resistance................................................................................... 22
5.7.2Characteristics of the current transformers ................................................................................. 23
5.7.3Overloading of the WIP1.............................................................................................................. 25
5.7.4Dimensioning example ................................................................................................................ 26
6.Operations and settings ......................................................................................... 28
6.1Function of push buttons ................................................................................................................. 29
6.1.1Measuring value and fault indication ........................................................................................... 29
6.1.2Display ......................................................................................................................................... 30
6.1.3Setting procedure ........................................................................................................................ 30
6.1.4Parameter setting by using the password ................................................................................... 30
6.2Display of measuring values............................................................................................................ 31
6.3Displaying the pickup phase ............................................................................................................ 32
6.4Display of tripping values................................................................................................................. 32
6.5Protection parameters ..................................................................................................................... 34
6.5.1Pickup value for phase overcurrent element ............................................................................... 34
6.5.2Time current characteristics for phase overcurrent element ....................................................... 34
6.5.3Trip delay or time multiplier for phase overcurrent element ........................................................ 34
6.5.4Reset mode for inverse time tripping characteristics for phase overcurrent element ................. 35
6.5.5Minimal time................................................................................................................................. 35
6.5.6Current setting for high set element ............................................................................................ 35
6.5.7Trip delay for high set element .................................................................................................... 35
6.5.8Pickup value for earth fault current element ................................................................................ 36
6.5.9Tripping characteristic for earth fault current element ................................................................. 36
6.5.10Trip delay or time multiplier for earth fault overcurrent element .............................................. 36
6.5.11Reset mode for normal inverse time tripping characteristics for earth fault element .............. 36
6.5.12Minimum tripping time (earth fault element) ............................................................................ 36
6.5.13Current setting for earth fault high set element ....................................................................... 36

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 4
6.5.14Trip delay for earth fault high set element ............................................................................... 36
6.6System parameters.......................................................................................................................... 37
6.6.1Selection of the language ............................................................................................................ 37
6.6.2Password programming............................................................................................................... 37
6.6.3Date setting.................................................................................................................................. 38
6.6.4Time setting ................................................................................................................................. 38
6.6.5Rated frequency setting............................................................................................................... 38
6.6.6Adjustment of the slave address (WIP1-3) .................................................................................. 38
6.6.7Baud Rate setting (WI1-3) ........................................................................................................... 38
6.6.8Setting of parity............................................................................................................................ 39
6.6.9Indication of the software version ................................................................................................ 39
6.7Tripping method/Relay matrix.......................................................................................................... 39
6.7.1Reset............................................................................................................................................ 39
6.7.2Tripping method........................................................................................................................... 39
6.7.3Earth fault overcurrent ................................................................................................................. 40
6.7.4Flashing of the Trip-LED.............................................................................................................. 40
6.7.5Relay matrix (only relay 2) ........................................................................................................... 40
6.8Signal inputs .................................................................................................................................... 41
6.8.1Fast trip ........................................................................................................................................ 41
6.8.2Blocking the protection functions ................................................................................................. 41
6.9Reset................................................................................................................................................ 41
6.10Clearing the fault memory................................................................................................................ 42
7.Relay testing and commissioning ......................................................................... 43
7.1Checking the set values................................................................................................................... 43
7.2Secondary injection test................................................................................................................... 43
7.2.1Test equipment ............................................................................................................................ 43
7.2.2Example of test circuit.................................................................................................................. 44
7.2.3Checking the tripping circuits....................................................................................................... 45
7.2.4Checking the input circuits and measured values ....................................................................... 47
7.2.5Checking the overcurrent element............................................................................................... 47
7.2.6Checking the high set element of the relay ................................................................................. 47
7.2.7Checking the external blocking.................................................................................................... 48
7.2.8Checking the input "Fast trip" ...................................................................................................... 48
7.2.9Remote trip .................................................................................................................................. 48
7.2.10Test of input „External Reset“ .................................................................................................. 48
7.2.11Checking the battery................................................................................................................ 48
7.2.12Loss of information due to non-existent or empty battery ....................................................... 49
7.3Primary injection test ....................................................................................................................... 50
8.Maintenance ............................................................................................................ 51
8.1Changing the Battery ....................................................................................................................... 51
9.Technical data ......................................................................................................... 54
9.1System data..................................................................................................................................... 56
9.2Setting ranges and steps ................................................................................................................. 57
9.3Inverse time tripping characteristics ................................................................................................ 58
9.3.1Tripping characteristics................................................................................................................ 60
9.4Relay case ....................................................................................................................................... 67
9.5Flag indicators ................................................................................................................................. 68
10.Order form ............................................................................................................... 69

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 5
1. Comments on the manual
This manual explains in general the tasks of device planning, parameter setting, installation, commissioning,
operation and maintenance of the WIP1 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, pa-
rameters 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
observations.
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 is-
sued. 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 er-
rors or disregarding the directions of this manual.
No part of this manual is allowed to be reproduced or passed on to others in any form, unless Woodward
Kempen 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 especially of the local safety regulations and have the necessary experience for working on electronic
protection devices and power installations (provided by evidence).
1.1 Information Concerning Liability and Warranty
Woodward Kempen GmbH 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 Woodward Kempen GmbH specialists.
Warranty and liability conditions stated in Woodward Kempen GmbH General Terms and Conditions are not
supplemented by the above mentioned explanations.

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 6
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 re-
sult in death or serious injury.
CAUTION, used with the safety alert symbol, indicates a hazardous situa-
tion 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.

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 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.
4. Do not remove any printed circuit board (PCB) from the control
cabinet unless absolutely necessary. If you must remove the PCB from
the control cabinet, follow these precautions:
Do not touch any part of the PCB except the edges.
Do not touch the electrical conductors, the connectors, or the
components with conductive devices or with your hands.
When replacing a PCB, keep the new PCB in the plastic antistatic
protective bag it comes in until you are ready to install it.
Immediately
after removing the old PCB from the control cabinet, place it
in the
antistatic protective bag.
To prevent damage to electronic components caused by improper
handling, read and observe the precautions in Woodward manual 82715,
Guide for Handling and Protection of Electronic Controls, Printed Circuit
Boards, and Modules.
Woodward Kempen GmbH reserves the right to update any portion of this publication at any time. In-
formation provided by Woodward Kempen GmbH is believed to be correct and reliable. However, no
responsibility is assumed by Woodward Kempen GmbH unless otherwise expressly undertaken.

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 8
2. General
The WIP1 is a self powered time overcurrent relay with multi-characteristics. Definite time and inverse time
trip-ping characteristics can be selected. The WIP1-1 does not require any aux. voltage supply, consequently
it can also be used for switchboards without built-in batteries. It takes its power supply energy from the C.T.
circuits and provides the tripping pulse energy to the circuit breaker. Due to its wide setting ranges, the trip-
ping characteristic can be selected to protect a wide variety of different equipment.
The WIP1 is available with earth fault element . The relay is buffered by a battery for feeding the LC display
as well as for memorizing fault values and reset of the trip relay. Failure of the battery has no effect on the
protective functions of the relay. The battery has a service life of more than 10 years.

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 9
3. Characteristics and Features
Auxiliary voltage supply is not required
User-friendly setting procedure with wide setting ranges
Digital filtering of measured quantities by using discrete Fourier analysis to suppress high
frequency harmonics and transient DC components induced by faults or system operations
Two-element overcurrent and short circuit relay
Selectable protection functions between:
- definite time overcurrent and
- inverse time overcurrent
Selectable inverse time characteristics acc. to IEC 255-4:
- normal inverse (type A)
- very inverse (type B)
- extremely inverse (type C)
- special characteristics
Reset mode for inverse time characteristics selectable
High-set overcurrent element with instantaneous or definite time function
Two-stage earth fault supervision with tripping and/or alarm function
Redundant power supply unit for external voltage supply (Option WIP1-2)
Serial interface for connection to SCADA Systems (Option WIP1-3)
Phase and earth current measuring during normal operation
Five fault memories
High-accuracy components and over-rating guarantee precision, reliability and a long
service life
High operating reliability through internal self-supervision (watchdog); internal faults are
indicated by an alarm relay
Remote tripping via external voltage
High-capacity electric pulse output for direct triggering the circuit breaker
Trip indication via external flag indicator with mechanical reset
Two potential free alarm contacts, latched type (bi-stable relay)
Relay with one potential free contact; tripping function selectable
Trip value indication via LCD display, battery-buffered
Compact construction
Insensitive to extreme environmental conditions
In accordance with the specified technical data, it complies with the requirement of
VDE regulation 0435-303, IEC255, VDE 0843

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 10
4. Design
4.1 Connections
Figure 4.1: Connection example with relay tripping
Important Information!
It is essential that the WIP1 is earthed via terminal .

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 11
Figure 4.2: Block diagram
Please note!
In this circuit we recommend earthing the current transformers via the relay connection. *1: If the cur-rent
transformers have to be earthed directly, the earthing connection on WIP1 must be removed. Otherwise the
measuring transformer for earth fault measuring is short circuited.

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 12
Figure 4.3: Block diagram WIP1-I1 (only phase current measuring)

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 13
Figure 4.4: Block diagram WIP1-I1-E1 with earth fault detection via C.T. cable type

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 14
Figure 4.5: Connection example with relay tripping
4.1.1 Connecting the serial Interface
The relays are connected to a PC/laptop via an RS232/RS485-interface converter by using the two-wire
method. Each relay is connected to terminals P and N. The last relay in terms of »»hardware«« must then be
equipped with terminating resistors. This is done by connecting terminals P with J1 and N with J2.
Figure 4.6: Connection of the serial interface

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 15
4.1.2 Analog inputs
The protection unit WIP1 receives the analog input signals of the phase currents IL1 (1S1 - 1S2),
IL2 (2S1 - 2S2) and IL3 (3S1 - 3S2) for phase current, earth current and negative sequence measuring. The
measured current values are analogously filtered and fed to the analog/digital converter.
4.1.3 Control inputs
Input remote tripping
The remote tripping input (terminals 20 and 22) enables tripping by an external voltage pulse, e.g. from a
thermal overcurrent tripping device, Buchholz protection or other external trip commands. By bypassing the
measuring circuits, this input (230 V AC max. 5 min) has a direct effect on the trip circuit. The input terminals
are galvanically decoupled from the relay electronics.
Signal inputs
Signal inputs for blocking and protection (terminals 14 and 17) for fast trip (terminals 32 and 33) as well as
external reset (terminals 14 and 15) can be activated by applying an external voltage.
Blocking function (terminals 14 and 17):
Single or all trip elements can either be blocked or re-leased.
Fast trip (terminals 32 and 33):
By this function the CB can be tripped instantaneously. There are two different kind of trippings:
Instantaneous means, a trip is initiated as soon as the minimum current is available (lowest power supply
value adjustable).
After activation means, the high-speed tripping function only is activated if one of the phase currents ex-
ceeds the set value.
The fast trip input can be applied for e.g. arcing fault detectors.
Reset
After a trip event the alarm relay is reset and the LED extinguishes when voltage is applied (see also chapter
5.9).

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 16
4.1.4 Operation outputs
There is the choice of two tripping methods:
Electric pulse output
As trip commands the WIP1 gives power pulses direct to the tripping coil of the CB (terminals 1 and 2). The-
se pulses are given every 250 ms and repeated until the CB is switched off.
Potential free contacts (relay 1/latching) terminals (23, 24, 28 and 24, 25, 26)
For applications where a higher trip output energy is required, a bi-stable relay with two potential free
changeover contacts is provided in the trip circuit. After the relay has tripped, the contacts remain in trip posi-
tion until reset by the <RESET> push button.
Potential free contacts (relay 2) terminals (34, 35, 36)
For applications where a higher trip output energy is required, a relay with one potential free changeover
contact is provided in the trip circuit. This Relay can be assigned to any function (see 5.7).
Example:
When using DC coils it has be observed that the breaking capacity of the output contacts is not unlimited
(see chapter 7).
In case the coil burden is higher than the contact breaking capacity, the following circuit arrangement can be
used:
Figure 4.7: Example
By connecting a trip contact of the WIP1 and an aux. contact of the C.B. in series it is
prevented that the WIP1 contact is arcing so that safe switching off is guaranteed.
Watchdog (Terminals 29, 30, 31) For continuous supervision of the program flow a
"hardware watchdog" is installed. In case of processor failure, the watchdog is activated
after detection of a specific minimal current. The self supervision relay is a working current
relay.

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 17
4.1.5 Battery
The WIP1 relay is provided with a lithium battery for maintaining the clock function and to allow setting and
read out without external power supply. The fault memory and parameters can be read-out or changed. The
battery is housed underneath the front cover of the relay at the lower right corner and is fastened by plug
terminals.
Hazardous Voltage
Battery contacts behind front cover may cause electric shock. Read and
follow instructions in section “Changing the Battery”
Disconnect from all power (supply) sources
Secure against reconnection
Verify if the equipment is dead
Connect to ground and short-circuit all phases
Cover or safeguard all live adjacent parts
4.1.6 Trip indication
The WIP1 is provided with an LED for the optical trip indication. Tripping can additionally be indicated via an
external indicator. Flashing of the LED can be sup-pressed by parameter setting.
4.1.7 Serial Interface
By way of hardware the serial interface is a RS-485 interface. The WIP1-3 relay can alternatively be pro-
vided with either Modbus Protocol or Woodward-Pro Open Data Protocol. For protocol data please see the
Profi-Pack file for Modbus or the Woodward-Pro Open Data Protocol.

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 18
5. Working Principle
5.1 Analog circuits
The alternating currents induced by the main current transformers provide the WIP1's supply energy and
form the measuring value. The measuring currents are galvanically isolated via the input transformers, de-
coupled from high-frequency interferences by analog RC-filters and then converted into current proportional
voltages. The noise signals caused by inductive and capacitive coupling are suppressed by an analog R-C
filter circuit. The analog voltage signals are fed to the A/D-converter of the microprocessor and transformed
to digital signals through Sample- and Hold-circuits. The analog signals are sampled at 50 Hz (60 Hz) with a
sampling frequency of 800 Hz (960 Hz), namely, a sampling rate of 1.25 ms (1.04 ms) for every measuring
quantity. (16 samples per period).
5.2 Digital circuits
The essential part of the WIP1 is a powerful microcontroller. All of the operations - from the analogue/digital
conversion to the relay trip decision - are carried out by the microcontroller digitally. The relay program is
saved in an EPROM (Electrically-Programmable-Read-Only-Memory). With this program the CPU of the
microcontroller processes the voltages applied at the analogue input circuits and calculates the basic current
harmonics. For this calculation an efficient digital filter, based on the Fourier Transformation (DFFT - Discrete
Fast Fourier Transformation) is applied to suppress high frequency harmonics and DC components caused
by fault-induced transients or other system disturbances. The relay setting values for all parameters are
saved in a parameter memory (EEPROM - Electrically Erasable Programmable Read-only Memory) and
constantly compared with the actual current by the microprocessor. If a phase current exceeds the pickup
value, an alarm is given and after the set trip delay has elapsed, the corresponding trip relay is activated. For
continuous supervision of the program flow a "hardware watchdog" is installed. In case of failure, the watch-
dog timer resets the microprocessor and gives an alarm signal via the "self-supervision" output relay. Error of
the program is indicated by the following display:
_Internal_Fault__
________________

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 19
5.3 Battery buffer
The relay is provided with a battery fed clock IC so that the actual relay settings cannot be lost or parameters
can be set, even if the power supply is interrupted. An empty or missing battery does not impair the proper
working order of the relay.
5.3.1 Additional power part
The relay versions WIP1-2 and WIP1-3 include an additional power part. This power part serves for the self-
supply of the relay. It does not provide the trip energy for the impulse output. The relays WIP1-2 and WIP1-3
will also function without this power part being connected. In that case they will only work with the functional
scope of the WIP1-1.
5.3.2 Transformer Power Supply
Without additional auxiliary voltage supply the WIP 1 works, starting the following current values:
single-phase starting approx. 0.35 A
two-phase starting approx. 0.22 A
three-phase starting approx. 0.17 A
5.3.3 Important note for the battery function
Battery Mode
By pressing the push-button <Display ON>, the relay is activated. WIP1-1 is supplied from the battery. This
function is useful to allow setting of parameters without additional auxiliary voltage.
Operating range
1-phase up to approx. 0.07 A
2-phase up to approx. 0.06 A
3-phase up to approx. 0.05 A
Transformer Current Mode
The WIP1-1 is supplied by means of the current trans-formers.
Without additional auxiliary voltage supply, the WIP-1 works – starting the following current values:
1-phase, starting approx. 0.35 A
2-phase, starting approx. 0.22 A
3-phase, starting approx. 0.17 A
If the display shows a blinking minus sign, the WIP1-1 is just selecting one of the two operating modes. In
this state, access to measuring values or parameters is not possible.
This display indication does not mean that the battery is defective or empty, but it is a further operating state.
The same applies for the units WIP1-2 and WIP1-3, if the power supply unit is not applied.

Manual WIP1 GB Woodward
DOK-TD-WIP1 Rev.F 20
5.4 Indicating and operating elements
5.4.1 Front plate
There are the following indicating and operating elements at the front of the relay:
Two-line LC display with 16 characters per line
Push buttons for adjustment and operation
LED for trip indication
5.4.2 Display
All setting and measuring values as well as fault data are shown in the LC display.
5.4.3 LED
The trip status is indicated by the LED at the front. If the relay has tripped, the LED flashes and can be
switched off by pressing any push button. Refer to chapter 5.7.4 and 5.9.
5.5 Function push buttons
The following four function push buttons are arranged at the front of the relay:
<SELECT/RESET> "Select" = Selection of function displayed (short pressing of the
push button) "Reset" = Reset of trip functions (long pressing of the
push button, for 3s)
<+> and <-> Selection of parameters
<ENTER> Storing parameters
<DISPLAY ON> Switching the relay on. If no key is pressed longer than 1 min. the relay
switches off.
The push buttons <SELECT/RESET>, <+>, <-> and <DISPLAY ON> can be activated without removing the
transparent cover by simply using a pin or screw driver.
Figure 5.1: Front plate of WIP1