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Trafox SUPERINTEND IC-01 Скачать руководство пользователя страница 10

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© Copyright Muuntosähkö Oy – Trafox

Superintend IMD

http://www.trafox.fi

The RS-485 connection is made using a 2*2 twisted paired cable equipped with a shield
(e.g. AWG22=0.32 mm²=106 Ω/km). In that case, the maximum length of the chain
from the IM-01.MED unit to the last remote unit is 500 m. If a thinner cable is used, the
allowed length shortens inversely proportionately to the cable resistance. The cable
shield is connected to the SH terminal of each unit. The shield is connected to the
network protective earth in the IM-01.MED unit. In other devices, the shields are floating
and the connector only functions as a joining connector of two shields. The twisted pairs
are connected so that the A–B signals are in one pair and the +12V–earth are in another
pair.

Examples of network connection. In the upper Figure, the IM-01.MED unit is in
the middle of the chain, and in the lower Figure, it is at the end of the chain.
Terminators are installed in the green units.

Checklist for the installation of the bus:



Each unit of the same type must have a unique address.



No more than two RS-485 cables may be installed in any unit. Otherwise, the bus
does not form an uninterrupted chain but has branches.



The shields of the cables are connected to the SH terminal of each unit.

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Содержание SUPERINTEND IC-01

Страница 1: ...hts to modify the content reserved Copyright Muuntosähkö Oy Trafox 15 9 2020 SUPERINTEND IM 01 MED IC 01 TC 01 RD 01 PEC 01 IMD Insulation Monitoring device for non grounded IT electrical networks for medical locations Instructions for installation and use v1 15 AC DC MED ...

Страница 2: ...TURE 17 MONITOR MENU 19 ALARM MENU 22 SETUP MENU 27 NETWORK SCAN 31 NETWORK VIEW ADDING AND REMOVING DEVICES 34 AUX ALARM MASK 36 IP SETTINGS 38 ERRORS 39 LOG FILES 40 Event log EVENTLOG TXT 41 Measurement log MEASLOG TXT 47 Setup log SETUPLOG TXT 48 MODBUS TCP REMOTE CONTROL 49 REMOTE CONTROL UNITS 54 INSULATION RESISTANCE REMOTE CONTROL UNIT IC 01 54 TRANSFORMER REMOTE ALARM UNIT TC 01 56 INSULA...

Страница 3: ... 3 http www trafox fi RD 01 UNIT 67 MECHANICAL DIMENSIONS 68 QUICK INSTRUCTION TEMPLATES OF IC 01 AND TC 01 FOR MEDICAL LOCATIONS 71 QUICK INSTRUCTION TEMPLATE OF RD 01 FOR MEDICAL LOCATIONS 72 IM 01 MED QUICK INSTRUCTION FOR ACKNOWLEDGING ALARMS 73 ...

Страница 4: ...hown below which indicates that if the device has been installed incorrectly or used in violation of instructions safety could be jeopardised The description of the symbol is presented in this manual instead of on the device due to space constraints Such sections are marked with the symbol shown below A symbol indicating possible danger A description of the symbol may be placed on the device or pr...

Страница 5: ...n is performed as presented in Figure 1 The installation and wiring should be performed in accordance with standards IEC 60364 as well as EN 50110 The operating voltage connection of IM 01 MED must always be equipped with a coupler or a circuit breaker so that the electricity supply can be disconnected for the duration of maintenance work for example The location of the disconnectors must be clear...

Страница 6: ...to PE TEMP Isolation transformer temperature sensor s NTC PT100 input Internally connected to PE TEMP Isolation transformer temperature sensor s NTC PT100 input Measuring range 0 2 5VDC TG Alarm terminal of protective earth to be connected to the PE rail MG Electronics protective earth to be connected to the PE rail M1 Connection 1 of the network to be monitored 1 Max 240VAC 280VDC M2 Connection 2...

Страница 7: ...ng connectors to be connected to the PE rail PE1 Measuring channels for earthing resistance Each channel is connected to the last PE connector in the wall socket chain with a 2 5mm wire PE2 PE3 PE4 PE5 PE6 The measuring connectors of the PEC 01 units are cabled with 2 5mm installation wires PE0 is connected to the PE rail of the switchboard and the measuring channels are connected to the earthing ...

Страница 8: ...8 Copyright Muuntosähkö Oy Trafox Superintend IMD http www trafox fi Figure 1 System connection ...

Страница 9: ...hen waits for their answers The CLT 01 unit has no address settings either The IM 01 MED unit and PEC 01 units are installed in the switchboard and connected to the mains current Remote units are installed in mounting boxes They as well as the CLT 01 unit to be installed in the switchboard receive the 12VDC supply electricity from the IM 01 MED unit All units are connected to each other via the RS...

Страница 10: ...unit In other devices the shields are floating and the connector only functions as a joining connector of two shields The twisted pairs are connected so that the A B signals are in one pair and the 12V earth are in another pair Examples of network connection In the upper Figure the IM 01 MED unit is in the middle of the chain and in the lower Figure it is at the end of the chain Terminators are in...

Страница 11: ...S The addresses of the TC 01 and IC 01 units are set so that there is only one address per unit in the range of addresses for either unit type A TC unit may have the same address as an IC unit but no TC unit may have the same address as another TC unit the same applies to the IC units If a TC 01 IC 01 unit is the first or last device of the bus connect the two pins next to the terminal strip to ea...

Страница 12: ...4 The address is set using buttons see section INSULATION RESISTANCE AND TRANSFORMER REMOTE ALARM UNIT RD 01 Setup mode for more information If the RD 01 unit is the first or last device of the bus connect the two pins next to the terminal strip to each other with a terminator jumper The order of pins in RD 01 is shown in the Figure below A B SH 12V The pins to be connected by means of a terminato...

Страница 13: ...he same as that of a TC 01 or IC 01 unit If a PEC 01 unit is the first or last device of the bus connect the TR and B pins of the terminal strip with a wire jumper HW SETTINGS OF THE IM 01 MED UNIT Setting a device address is not necessary in the IM 01 MED unit If the IM 01 MED unit is at the end of the bus a terminator must be connected The terminator jumper is located under the centre cover in t...

Страница 14: ... the SETUP menu After the bus inspection the IM 01 MED unit displays the type and address of each unit on the screen For the PEC 01 units the number of channels used and the resistance measured from each channel during bus inspection are also displayed The user must approve and verify all measured PE resistances and addresses The IM 01 MED unit creates a table of the device addresses and the measu...

Страница 15: ...k Scan ENSURE that all installed units IC TC RD PEC are identified and have the correct addresses and that the measured PE resistances correspond to the physical lengths of the installed earthing wires During network scanning the resistances from all channels of all PEC 01 units connected to the system are measured Therefore performing a Network Scan Network View is permitted in medical locations ...

Страница 16: ...ng premises The unit gives an alarm of the isolation transformer overload or over temperature insulation errors or a faulty earth conductor One system can include 5 RD 01 alarm units The CLT 01 unit is a current loop transmitter for insulation resistance with a standard 0 20 4 20 mA current message It is installed in the switchboard IM 01 MED UNIT The IM 01 MED unit is the central unit of the syst...

Страница 17: ...ce to be measured The insulation resistance and capacitance are calculated by measuring the current amplitude and phase In addition the device measures the secondary current and temperature of the isolation transformer if the current transformer and the NTC PT100 sensor have been connected to the measurement couplers reserved for them and have been enabled in the Setup menu The system functioning ...

Страница 18: ... ALARM The menu level is the sub level of the aforementioned and it is browsed using the and buttons The screen mode is the mode following the menu level and it displays the value of the parameter time also displays a stopped AutoScroll mode The screen mode can be accessed from the menu level by pressing the T button The AutoScroll mode is in use in the Setup menu items where there are several par...

Страница 19: ...utoScroll or edit mode On the edit level approves the changes made Pressing the button in the first three items of the Monitor menu and approving the start of the test begins the system test A general reject button Returns to the previous mode from all modes Pressing the B button an appropriate number of times takes you to the default mode of the main menu insulation resistance capacitance from an...

Страница 20: ...ity of the background light can be adjusted to four different levels LOW MED LOW MED HIGH HIGH Time and date All fixed alarms can be acknowledged on one go The default display is insulation resistance and capacitance Other parameters and functions can be viewed by using the and buttons The system test is started from the Monitor menu by pressing T and then selecting Y in the Start test menu and pr...

Страница 21: ...Superintend IMD Copyright Muuntosähkö Oy Trafox 21 http www trafox fi ...

Страница 22: ...he event log of the memory card An alarm always indicates that the fault in question is still active An active fault cannot be acknowledged until the issue that caused it has been fixed The fixed fault is acknowledged when its time is checked and the T button is pressed The B button takes you back to the menu level without acknowledging the fault Faults in the PEC 01 units can also be acknowledged...

Страница 23: ...Superintend IMD Copyright Muuntosähkö Oy Trafox 23 http www trafox fi ...

Страница 24: ...eactivated only when the measured value deviates by 5 in a safe direction from the limit given The screen mode of each parameter alternately displays the following On the top row the value fault limit of the parameter that caused the fault and on the bottom row the current status OK ALARM or OLD ALRM Fault start time and date If the fault has been deactivated and becomes active again the start tim...

Страница 25: ...MeasFail alarm is active if the system is unable to measure the insulation resistance In that situation an insulation resistance alarm is also always given Reasons for the fault may include capacitance that is too high The Noise alarm is active if network disturbances are too extensive The Temp Lim alarm is active if the temperature of the isolation transformer is too high The T sens 0 alarm is ac...

Страница 26: ... 01 MED unit or the PEC 01 unit The screen modes of the alarm menu may be as follows for example The resistance of the measurement loop of channel 2 of the PEC 01 unit in address 3 is outside the measurement range in other words resistance is between 2 55Ω 500kΩ The initial value of resistance measured when the bus was scanned is 0 60Ω Fault start time The measurement loop of channel 2 of the PEC ...

Страница 27: ...hange the blinking number with the and buttons and press the button to move to the next digit Enter the three digits and press T After this you can navigate the menu with the and buttons The B button takes you to the initial mode The default password is 123 The password is saved in the setup log of the microSD card and can be changed by editing the setup log file in a text editor The password chan...

Страница 28: ...28 Copyright Muuntosähkö Oy Trafox Superintend IMD http www trafox fi ...

Страница 29: ... used NTC or PT100 PT100 CALIBRATION This setting is only used when PT100 is selected as the temperature sensor It can compensate for the error caused by long measurement wires the maximum loop resistance is 20 Ω in the temperature value A 130 Ω resistor is connected to the end of the measurement wires in the place of the PT100 sensor after which calibration is performed If the resistance measured...

Страница 30: ... of a broken measurement loop or a PE resistance that is too high This setting is permitted only temporarily under exceptional conditions AUX ALARM MASK Defines which errors affect the functioning of the AUX ALARM relay The alternatives are An erroneous number of devices a microSD card fault insulation fault pre alarm PE wire fault a wrong time insulation level and transformer sum alarm All parame...

Страница 31: ...n other words at this phase the number and addresses of the devices and in particular the number of PE unit channels and resistance accuracy must be checked carefully If you don t want to change approve all values simultaneously use the Network View function It should be used when a small change is made in the system for example one remote unit or one PE channel is added or removed and remeasuring...

Страница 32: ...32 Copyright Muuntosähkö Oy Trafox Superintend IMD http www trafox fi Resistance that is too high in a PE unit channel Duplicate addresses ...

Страница 33: ...ce is more than 2 55 Ω The previous approved value was 0 4 Ω Channel 2 of the PEC 01 unit 8 is connected but its resistance is more than 2 55 Ω The channel was not connected at all in the previous approved configuration Channel 1 of the PEC 01 unit 8 is connected and its resistance is 0 20 Ω The channel was not registered in the previous approved configuration The IC 01 unit 8 is connected and it ...

Страница 34: ...an be browsed manually using those buttons If the device already has a previously approved configuration the AutoScroll mode displays the measured value of each parameter and the approved value from an earlier configuration saved in the EEPROM memory The results are approved with the T button and a confirmation is then requested Confirm Add Confirm Delete Confirm Change as applicable When Y is sel...

Страница 35: ...Superintend IMD Copyright Muuntosähkö Oy Trafox 35 http www trafox fi ...

Страница 36: ...tected within three seconds of the end of communication MEMORY The microSD memory card is defective full or missing CLOCK The time is incorrect An alarm is given if the operating voltage of the circuit maintaining the real time clock has dropped too low In that case the time is incorrect This alarm is a sign of a depleted battery and the battery needs to be changed SUM FUNCTION Insulation and tran...

Страница 37: ...Superintend IMD Copyright Muuntosähkö Oy Trafox 37 http www trafox fi ...

Страница 38: ...f each octet is 000 255 Whenever you move to the next octet with the button the device verifies that the value of the previous octet is not more than 255 If this is not the case the cursor returns to the beginning of the erroneous octet Also when saving the parameter with the T button the device verifies the validity of all octets If any octet is erroneous the display returns to the edit mode of t...

Страница 39: ...LARM ALARM TRF Over temperature TEMPERATURE Temp Lim OVERTEMP ALARM ALARM TRF Insulation fault R under InsLimit INSULATION Insulat INSULATION FAULT ALARM INS Insulation fault R under PrInsLim INSULATION PreInsul INSULATION WARNING WARNING AUX PE fault a break in the channel of the PEC 01 remote unit or resistance exceeds the alarm limit WIRE FAULT WireFaul PE FAULT ALARM FAIL AUX Incorrect time Cl...

Страница 40: ...istory on the microSD memory card Compatible card types are microSD and microSDHC The card type microSDXC is not compatible The card must be pre formatted to FAT32 and its maximum storage capacity is 32 GB The maximum amount of card storage capacity used is 4 GB The event history is stored only when the card is inserted into the device and enabled in the SETUP menu Once the memory card has been en...

Страница 41: ...anged from L1 to L2 Insulation Prealarm ON NkOhm LkOhm The insulation pre alarm activated with value N whereas the limit value has been L Insulation Prealarm OFF The insulation pre alarm is no longer active Insulation Prealarm Acknowledge The insulation pre alarm that is no longer active was acknowledged manually Alarm Limit changed PreInsulation L1 L2 The insulation resistance pre alarm limit val...

Страница 42: ...he measuring circuit of the transformer s temperature sensor recovered from a short circuit The alarm was acknowledged manually Overload ON NA LA The overload alarm activated with value N whereas the limit value has been L Overload OFF The overload alarm is no longer active Overload Acknowledge The overload alarm was acknowledged manually Alarm Limit changed Load L1 L2 The overload limit value was...

Страница 43: ...stored Too much noise N L The insulation resistance measurement continuously has a noise level too high N whereas the alarm limit is L Noise normal level The noise level of the insulation resistance measurement has returned to normal PE Alarm ON PEXX CHCC N L The resistance fault of channel CC of the PEC 01 unit in the PE address of XX has been activated with value N whereas the limit value has be...

Страница 44: ...ss XX Missing RD Alarm ON RDXX The RD 01 unit configured in the RD address XX is not responding Missing RD Alarm OFF RDXX The RD 01 unit configured in RD address XX is responding again or has been removed Missing RD Acknowledge RDXX Identification or removal of the RD 01 unit from the RD address XX was acknowledged manually RD Unit Removed RDXX The RD 01 unit configured to RD address XX has been r...

Страница 45: ...n performed but the configuration identified was not approved Network Scan Confirmed TCXX The Network Scan was performed and the TC 01 unit in the TC address XX was approved in the network Network Scan Confirmed ICXX The Network Scan was performed and the IC 01 unit in the IC address XX was approved in the network Network Scan Confirmed RDXX The Network Scan was performed and the RD 01 unit in the...

Страница 46: ...d too low amplitude The system test detected a measurement voltage that was too low System Test Failed too high amplitude The system test detected a measurement voltage that was too high System Test Failed too short group delay The system test detected a measurement delay that was too short System Test Failed too long group delay The system test detected a measurement delay that was too long Syste...

Страница 47: ...tance is C 0 1 the measurement range has been exceeded This could be due to a disconnected wire for example Details of it can be found in the event log If the value of capacitance is 1 a row has been added before the first measurement was completed after the start up Load A load in amperes Ttra C transformer temperature in Centigrade Tenv C device temperature in Centigrade Active PE Channels a lis...

Страница 48: ...at is PW NNN where NNN is a three digit ID code The ID code cannot be changed in the Setup menu in the file the value NNN must be changed A new passcode will only become valid at the start up The passcode read at the start up will be valid until the next start up InsLimit the limit value of the insulation resistance alarm kOhms PreInsLim the limit value of the pre alarm of the insulation resistanc...

Страница 49: ...lue 50 corresponds to 50 C It is updated four times per second 5 R W Limit parameter of the insulation resistance alarm uint16 kOh m Read and written in kOhms The register value 100 corresponds to 100 000 ohms The minimum maximum and interval values are in channels 16 17 and 18 6 R W The limit parameter of the insulation resistance pre alarm uint16 Read and written in percentages The register valu...

Страница 50: ... This does not acknowledge inactivate active alarms 16 R The lowest allowed value of the limit parameter of the insulation resistance alarm uint16 kOh m 50 17 R The highest allowed value of the limit parameter of the insulation resistance alarm uint16 kOh m 1000 18 R The resolution jog of the limit parameter of the insulation resistance alarm uint16 kOh m 50 19 R The lowest allowed value of the li...

Страница 51: ... R PE 00 configuration uint16 none Bit mask bit8 if 1 the device is approved in the network bit0 5 PE unit channels CH1 CH6 if 1 the channel is in use 37 R PE 00 status uint16 none Bit mask bit0 5 PE unit channels CH1 CH6 if 1 the channel alarm is active bit8 13 PE unit channels CH1 CH6 if 1 the channel alarm has been deactivated but not acknowledged 38 R PE 01 configuration uint16 none Bit mask b...

Страница 52: ...mask bit8 if 1 the device is approved in the network bit0 5 PE unit channels CH1 CH6 if 1 the channel is in use 51 R PE 07 status uint16 none Bit mask bit0 5 PE unit channels CH1 CH6 if 1 the channel alarm is active bit8 13 PE unit channels CH1 CH6 if 1 the channel alarm has been deactivated but not acknowledged 52 R PE 08 configuration uint16 none Bit mask bit8 if 1 the device is approved in the ...

Страница 53: ...uration uint16 none Bit mask bit8 if 1 the device is approved in the network bit0 5 PE unit channels CH1 CH6 if 1 the channel is in use 65 R PE 14 status uint16 none Bit mask bit0 5 PE unit channels CH1 CH6 if 1 the channel alarm is active bit8 13 PE unit channels CH1 CH6 if 1 the channel alarm has been deactivated but not acknowledged 66 R PE 15 configuration uint16 none Bit mask bit8 if 1 the de...

Страница 54: ...ault During the alarm the red LED fault indicator BLINKS If the fault has been deactivated but not acknowledged from the IM 01 MED unit the alarm LED indicator is steady The audible alarm is muted with the MUTE ALARM button which only silences the sound but has no other effect on system functioning An alarm silenced from one unit does not mute the other panels The audible alarm is also deactivated...

Страница 55: ...mit The alarm deactivates and the LED is steadily on when the break is fixed or resistance drops 5 below the alarm threshold initial value PEalarm The alarm limit is set as a percentage of the initial resistance value in SETUP PEalarm Also gives an alarm if any PEC 01 unit is defective or no longer responds to commands The SYSTEM FAULT LED blinks if the system has not received a command from the I...

Страница 56: ...t is set in SETUP LoadLim and it is a percentage of the nominal current of the isolation transformer The nominal current of the isolation transformer is set in SETUP Nom Cur The current measurement is also affected by the SETUP TranSize setting which is used to define the primary current of the current measurement transformer when its secondary current is 5A OVERTEMP ALARM blinks when the transfor...

Страница 57: ...gh the SETUP menu in the IM 01 MED unit RD 01 also gives an alarm if it is not connected to the IM 01 MED unit In addition the unit issues a warning if the system s insulation resistance is lower than the pre alarm limit set The OK LED is on if the unit functions normally and off if any fault is active In other words at least one LED indicator is on in the unit at all times The WARNING LED blinks ...

Страница 58: ...s a REMOTE UNITS error The MON ALARM button changes the screen mode between monitor and alarm modes The MUTE ALARM button silences the audible alarm It does not have any other effect on the functioning of the system as a whole A short press of the button changes the value displayed on the bottom line of the display A long press of the button 5 s gives the IM 01 MED unit the command to perform a sy...

Страница 59: ...stance pre alarm The upper line displays the momentary insulation resistance pre alarm limit Temperature alarm The upper line displays the momentary temperature alarm limit Load current alarm The upper line displays the momentary load current alarm limit PE wire alarm in which the address of the PEC 01 that caused the alarm disconnected channel or broken connection is displayed There are no active...

Страница 60: ...splays the LEDs blink and there is a short audible alarm After the test the test s result is displayed for a moment or After the test the screen returns to monitor mode System fault mode The system fault mode is entered from any screen mode if there is are no commands from the IM 01 MED unit for 3 seconds The screen displays the SYSTEM FAULT LED blinks and there is a audible alarm from the alarm b...

Страница 61: ...it within three seconds the IM 01 MED unit gives the REMOTE UNITS and WIRE FAULT errors The PEC 01 unit displays a SYSTEM FAIL error At the implementation the IM 01 MED unit requests the PEC 01 unit to measure the resistance of all channels connected to it and compiles a table After that the resistance measurement only functions by separate request MONITOR PEResist Measure IM 01 MED compares the m...

Страница 62: ...r is on steadily The RESET button acknowledges a fault only if the fault situation has been fixed in other words the PE wire break has been repaired or resistance is below the provided limit The faults of all channels are acknowledged at the same time Note that if the FAIL LED blinks the fault is still active and cannot be acknowledged The acknowledged faults are also removed from the alarm menu o...

Страница 63: ...SET button in the PEC 01 unit or from the alarm menu of the IM 01 MED unit CLT 01 UNIT The CLT 01 unit sends 0 20 4 20 mA standard current messages to the current loop of its output in accordance with the insulation resistance measured by IM 01 MED For the output to function an external 24 VDC voltage source is needed The output current of CLT 01 as a function of insulation resistance at the loop ...

Страница 64: ... www trafox fi The output current of CLT 01 as a function of insulation resistance at the loop current setting of 4 20 mA Calculation formula I 1920000 R kΩ 120 4000 uA If insulation resistance cannot be measured reliably CLT 01 sends the current value 22mA ...

Страница 65: ... of the network to be monitored 10 500Hz Input power 6W when the 12VDC output is not loaded 11W when it is loaded Internal fuse of the operating voltage 1AT Monitoring of the insulation level Measurement voltage Um 25Vp Highest measurement current Rf 0 Ω 150uA Measurement circuit resistance 225kΩ impedance 225kΩ 50 400Hz Highest allowed Ufg 1000V Alarm limit Ran 50kΩ 1MΩ Relative uncertainty 22kΩ ...

Страница 66: ...C 50 60Hz 1 min Useful life 100 000 connections with the maximum nominal load Serial bus RS 485 speed 9600bps half duplex 12VDC supply for the RS 485 bus devices maximum current 300mA Maximum cable length 500m Other details Operating temperature 0 50ºC relative humidity 90 non condensing Impact resistance IK06 1J IP class front panel IP40 IP class other casing IP20 Connector tightening torque 0 45...

Страница 67: ...8 IEC61010 1 2010 3 TC 01 and IC 01 UNITS Operating voltage 6 15VDC max 30mA 6V typical 8mA 12V Operating temperature 0 70ºC relative humidity 90 non condensing RS 485 speed 9600 bps Connector tightening torque 0 45 0 5 Nm Weight 86 g EMC standards EN61326 2 4 EN55011 EN61000 4 2 EN61000 4 3 EN61000 4 4 EN61000 4 5 EN61000 4 6 EN61000 4 11 Tested on the system level Other standards IEC61557 8 RD 0...

Страница 68: ...68 Copyright Muuntosähkö Oy Trafox Superintend IMD http www trafox fi MECHANICAL DIMENSIONS 160 mm 110 mm 62 mm 160 mm 110 mm 62 mm ...

Страница 69: ...Superintend IMD Copyright Muuntosähkö Oy Trafox 69 http www trafox fi 85 mm 85 mm 37 mm 85 mm 85 mm 51 5 mm 51 5 mm 60 mm 85 mm 85 mm ...

Страница 70: ...70 Copyright Muuntosähkö Oy Trafox Superintend IMD http www trafox fi 36 3 mm 110 mm 62 mm ...

Страница 71: ...TEM FAULT indicator means a disturbance in IC 01 In the case of any alarm silence the audible alarm with the MUTE ALARM button and notify __________________________ tel _________________ The device indicates the load level and temperature of the IT network isolation transformer When all is fine the OK indicator is lit If either ALARM indicator blinks the IT network is overloaded If this is the cas...

Страница 72: ...bly ALARM indicators blink a low insulation level alarm is active If only the ALARM indicator blinks the IT network is overloaded or there is an earthing break in the wall socket If this is the case disconnect devices from wall sockets starting from the one added last until the indicators no longer blink The SYSTEM FAULT indicator means a disturbance in RD 01 In the case of any alarm silence the a...

Страница 73: ...N FOR ACKNOWLEDGING ALARMS 1 Start situation R and C values are in accordance with the ones measured from the IT network 2 Press the screen displays 3 Press the screen displays 4 Press the screen displays 5 Press the screen returns to the start situation and the removed faults are now acknowledged ...

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