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Ver 1710 Rev 1

 

Protrol AB

 

 

Tel: 031- 45 82 00

 

Ullevigatan 19 

 

internet: www.protrol.se  

411 40 Göteborg 

24

 

e-mail: [email protected]

 

Earth Fault Test

 

Put a short circuit over one of the phases according to the drawing above using a 

short

 test cord. The 

current in the short circuit will simulate the measured earth current, and needs to be applied longer than 
the set 

Operation Delay

. Earth fault detection is indicated by the EF LED and closing of the output relay, if 

applicable. If connected to a PC, check the transient fault record using Protrol-Tool. 

A typical recording from an earth fault test is shown in Figure 12. 

 

Figure 12. 

Typical transient fault recording after an earth fault test. 

Verify that the EF Start and Trip signals are transferred to the dispatch center. 

7.3  EF Trig Level Check 

After connection to the current transformers, verify that the EF LED does not flicker vaguely. This indicates 
that the 

EF Trig Level

 may be set too low. 

7.4  Test of IPS after Commissioning 

Testing of earth fault detection is possible by simply short circuiting one of the three phases directly on the 
input terminal. Disconnect the output relay to avoid any unwanted actions. There must be a primary 
current (at least a few Amperes) in all three phases. 

7.5  Offset Elimination (zero offset calibration) 

A zero-offset calibration is made during manufacturing. 

If needed a calibration can also be manually made.  
Follow the steps below to initiate a calibration: 

1.

 

Short circuit and disconnect the current terminals. 

2.

 

Press and hold the 

Ack

 button while power cycling the device. 

3.

 

Release the 

Ack

 button when the 

ST

 LED turns on. 

4.

 

The 

I

0

>

 LED should now start flashing to indicate the calibration phase. 

 

Содержание IPS2 24 VDC

Страница 1: ...rectional earth faults that indicates faults using its relay outputs and IEC 60870 5 101 Since the algorithm for earth fault detection does not require a voltage transformer IPS2 gives a very cost efficient fault detection with high sensitivity for pass through faults in impedance earthed networks ...

Страница 2: ...__________ 13 5 4 Setting the IPS2 to Service Interface Mode __________________________________________ 13 5 5 Communication Cable ___________________________________________________________ 13 5 6 Protrol Main Window ___________________________________________________________ 14 5 7 IPS2 Transient Fault Recorder_____________________________________________________ 16 6 Configuration of IPS2 24 VD...

Страница 3: ... IPS2 0 OFF 0 04 s 1 0 5x 0 1 s 2 0 75x 0 2 s 3 1 0x 0 4 s 4 1 5x 0 6 s 5 2 0x 0 8 s 6 2 5x 1 0 s 7 3 0x 2 0 s OFF 0 04 s 1 0 A 0 1 s 1 5 A 0 2 s 2 0 A 0 5 s 2 5 A 1 0 s 3 0 A 2 0 s 5 0 A 5 0 s 10 A 30 s I I0 t I t X2 X3 X4 X6 X5 X1 Binary inputs 1 2 3 C 2 1 2 1 IA 1A C 2 IB 1A C 4 IC 1A C 6 3 5 1 2 RS485 RX TX 1 24 48 VDC GND _ _ 2 3 1 Ack t 5 0 1 2 3 4 6 7 8 9 5 0 1 2 3 4 6 7 8 9 I0 t 2 1 X7 EXT...

Страница 4: ...connecting and disconnecting the current terminals always short circuit the current path to avoid open circuits Short circuiting the current terminals when the earth fault detector is enabled is likely to be interpreted as an apparent earth fault If the EF detector has no binary input qualification enabled the IPS2 unit should either be switched off or pluggable connectors in X2 X3 should be disco...

Страница 5: ...current is too low or the fault was of transient type and was gone after the Operation Delay time Thus the Start object available remotely can be used as an early indication of an incipient fault Some periods after the disturbance has vanished the detector returns to its normal state High I0 Detection The IPS2 supervision alarm for high residual current if the steady state I0 current exceeds 16 ti...

Страница 6: ...ect operation of switching devices Thus it is possible to disconnect faults before the protection in the distribution substation reacts minimizing the consequences for the users upstream the fault Fault acknowledgement The LEDs including the external LED can be reset either by pressing the Ack button or automatically when the time of the Protrol Tool parameter LED flashing time has elapsed ...

Страница 7: ... break Binary Input 1 Binary Input 2 High residual current Analogue objects Five analogue objects three phase currents residual current and fault detected phase can be transmitted for supervision information purposes See the Table 1 Explanation of the Protrol IPS2 24 VDC Configuration settings for more information Protocol The available protocol is IEC 60870 5 101 Supported selection of ASDUs Stan...

Страница 8: ... interface is the RS485 port X5 see the chapter Schematic Overview for connector placement The jumper in the 3 pole header must be placed in position 2 3 for RS485 communication The device protocol is switched by pressing and holding the ACK button until the changed mode is indicated by a short flash on the I0 LED The device is always initiated after a power down or reset with the system interface...

Страница 9: ...t C2 interface and the internal serial port of IPS2 the front cover must be removed This is easily accomplished by removing the four screws in the corners of the cover Note that the screws need only to be turned 90 degrees 5 1 IPS2 24 VDC Main Printed Circuit Board Rev C Pluggable Terminal Blocks External cables are attached to the lower side of the IPS2 using pluggable contacts For more informati...

Страница 10: ...n of the IEC 60870 5 101 protocol is done using the C2 Port which is the grey socket labeled J6 on the Main PCB Configuration is described in the following chapter and requires the 9 pole DSUB adapter cable with article number 606537 3 pole Header There is a 3 pole header located on the Main PCB Using a jumper to short circuit two leads will configure the IPS2 unit to use the RS232 Service Port or...

Страница 11: ...olid LED indicates a detected but unacknowledged earth fault A Hertz flashing LED indicates a high I0 3 ST ST is a Hertz flashing LED indicating correct operation 4 Ack Acknowledge button for LEDs Turns off the I0 LED I LED and the external LED 5 PWR PWR is lit when power is applied 6 Rotary switch for overcurrent settings start level as a nominal current multiplier 7 Rotary switch for overcurrent...

Страница 12: ...urrent transformer ratio of 300 1 In the case a different ratio is used the levels are scaled proportionally Example 150 1 ratio and pickup level of 2 corresponds to a primary current setting of 150 300 2 A 1 A I I Position Pickup level pu 0 OFF 1 0 5 2 0 75 3 1 0 4 1 5 5 2 0 6 2 5 7 3 8 9 Not used I t Position Pickup delay s 0 0 04 1 0 1 2 0 2 3 0 4 4 0 6 5 0 8 6 1 0 7 2 0 8 9 Not used I I0 Posit...

Страница 13: ... indicated by a short flash on the I0 LED 5 5 Communication Cable To be able to use Protrol Tool with the IPS2 24 VDC unit a special 9 pole DSUB adapter cable with article number 606535 is required If the workstation lacks a physical COM port which most new laptops do a special USB COM converter must be added between the computer and the DSUB adapter cable Such adapter cables can be acquired where...

Страница 14: ...he more common USB interface Before using Protrol Tool for the first time the corresponding serial port USB driver must be installed in your computer If it will not be automatically installed by your operating system a link is available at www protrol se in the download section When starting Protrol Tool for the first time verify that the COM port settings are correct see Figure 6 The Port shall b...

Страница 15: ... Important Select the assigned USB COM port Acknowledge by pressing OK and then try to connect by pressing Connect If the dialog LED Running is flashing connection has been established Communication settings can be stored in the Registry by pressing the Store ComPort Settings button Next time Protrol Tool is started the selected port is opened automatically ...

Страница 16: ...be uploaded by pressing the Upload TFR button A curve is three power frequency cycles with approximately 10 ms of prefault data By pressing the ShowCurves or AutoScale buttons the TFR data will be displayed in the oscillogram If Primary values is checked the curves are scaled to primary values otherwise they represent unscaled binary values If AutoScale is not pressed the amplitude scale can be se...

Страница 17: ... is pressed anywhere along a signal all sample values at a given time are displayed in a popup see Figure 10 Figure 10 Sample popup A useful feature of the transient fault recorder is the possibility to make a snapshot of the actual phase currents by pressing the Freeze button and then the Upload TFR button The Freeze button is not available unless any registered faults have been Acknowledged see ...

Страница 18: ...ration of an IPS2 24 VDC is done with a stand alone tool for Windows This tool is used for basic configuration and allows the user to create or edit settings for an IPS2 to save and load this information to from disk and download a file to a unit A screenshot of the configuration tool with factory settings is shown in the figure below Figure 14 The Protrol IPS2 24 VDC Configuration Tool with facto...

Страница 19: ...ead CT ratio 50 1200 300 Relay choice 0 3 0 0 X2 Start X3 Trip 1 X2 EF Trip X3 OC Trip 2 X2 Watchdog X3 Trip Hardware version 3 only 3 X2 and X3 General Trip Operation mode 0 1 Bit 5 On All other Off Checkbox 7 DIR bit in balanced mode Checkbox 6 Balanced mode Checkbox 5 Send analog objects Checkbox 4 Time tag Checkbox 3 Not used Checkbox 2 Not used Checkbox 1 See relay choice Checkbox 0 See relay...

Страница 20: ...iguration tool to factory defaults by pressing the Factory button Open Configuration File Previously saved settings can be reloaded to the configuration tool by pressing the Open button A dialog opens and it is possible to browse and choose the desired configuration file Press Open to read the file Edit Configuration Data After the Factory or Open buttons have been pressed it is possible to adjust...

Страница 21: ...d preparation For downloading configurations to an IPS2 a USB Debug Adapter for C8051Fxxx from Silicon Labs and corresponding software is needed Figure 15 8 Bit USB Debug Adapter The adapter shall be connected to the C2 contact on the IPS2 For that you need a special cable that can be ordered from Protrol article number 606537 See figure below Figure 16 USB Debug Adapter connected to IPS2 ...

Страница 22: ...he IPS2 device as described above 2 Power up the IPS2 3 Start the Protrol IPS2 24 VDC Configuration Tool if not already started a Make sure you have version 2 0 0 or later of the tool b Check also that you have the files SiUtil dll and USBHIB dll in the same folder as the configuration tool 4 Open the configuration file to download the Open button or make sure you save the settings you currently m...

Страница 23: ...ntre 7 2 Current Injection Test Test circuit Connect the current source to phases A and B or any other combination of two phases according to Figure 11 Apply a current of 0 5 A The measured sum of the phases shall now be zero Verify with the built in transient fault recorder of Protrol Tool See section below for details Figure 11 Current injection test Overcurrent Test Increase the current of the ...

Страница 24: ...ed to the dispatch center 7 3 EF Trig Level Check After connection to the current transformers verify that the EF LED does not flicker vaguely This indicates that the EF Trig Level may be set too low 7 4 Test of IPS after Commissioning Testing of earth fault detection is possible by simply short circuiting one of the three phases directly on the input terminal Disconnect the output relay to avoid ...

Страница 25: ...Rev 1 Protrol AB Tel 031 45 82 00 Ullevigatan 19 internet www protrol se 411 40 Göteborg 25 e mail info protrol se Protrol AB Ullevigatan 19 411 40 Göteborg Tel 031 45 82 00 E post info protrol se www protrol se ...

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