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1. Safety Precautions

This Instruction Manual is meant mainly for those with specialized electrical knowledge who will use this product to manufacture assembled products,

perform electrical work, or conduct maintenance and inspections. This also includes those who will operate this product (the end user).

●

When installing or removing MDU Breaker main unit and

a Measuring Display Unit (MDU)

, first turn the host circuit breaker OFF and confirm that

no electricity is flowing.

●

This product must be handled by someone with specialized knowledge.

Caution

2. Precautions for Use

Unless otherwise noted, the following terms in this Instruction Manual indicate the models shown below.

2.1 Standard operating conditions

●

The standard operating conditions are described below. Be sure to use MDU Breaker within these conditions.

[1] Operating ambient temperature: -10°C to +40°C (must not exceed an average of +35°C within a 24 hour period)

[2] Ambient storage temperature: -25°C to +55°C (no condensation/freezing)

[3] Relative operating/storage humidity: 85% RH or less (no condensation)

[4] Altitude: 2,000 m or lower

[5] Operating/storage atmosphere: Must contain hardly any dust, smoke, corrosive gas, combustible gas, moisture, salt, etc.

●

If the ambient temperature of MDU Breaker e40°C, use with a decreasing continuous load current.

Ambient temperature of +50°C: 0.9 times, ambient temperature of +60°C: 0.7 times

●

Do not install in abnormal environments subject to high temperature, high humidity, dust, corrosive gas, vibration, impact, etc. Doing so may

cause electrical shock, fire, or may cause the product to stop working.

●

Do not wipe the MDU Breaker main unit or MDU with thinner, detergent, or chemical cloth.

Doing so may fade printing, reduce insulation performance, or cause mold to form. Clean with air or by brushing.

●

The case of the MDU may become discolored depending on the environment. However, this will not have any effect on performance.

●

The LCD may have bright (always on) or dark (always off) pixels due to the characteristics of LCDs.

Because LCDs contain many display elements, there is no way to ensure that bright or dark pixels will never occur. Bright or dark pixels are not
defects in the product itself.

Caution

Molded Case Circuit Breaker (MCCB)

NF400-SEW with MDU, NF400-HEW with MDU

NF800-SEW with MDU, NF800-HEW with MDU

400 A frame

800 A frame

Содержание NF400-HEW

Страница 1: ...or material damages assumed Using this under certain conditions could cause electrical shock Read this Instruction Manual carefully prior to use so that the product is used properly After reading this manual store it in a safe place so that it can be easily referenced when needed Make sure that the end user receives this Instruction Manual For models with CC Link communication refer to the PLC Use...

Страница 2: ...cedure 11 5 1 Installing MDU Breaker main unit 11 5 2 Attaching connection cable to MDU Breaker separate installation 11 5 3 MDU installation separate installation 12 5 4 Wiring of MDU terminal block 13 6 MDU Features and Functions 15 6 1 Features of MDU 15 6 2 Functions of MDU 15 6 3 Measurement functions 16 6 3 1 Measurement function list 16 6 3 2 Measurement rated values measurement range and a...

Страница 3: ...c setting values 37 9 4 Fault alarm display methods and display contents 39 9 5 Method for resetting fault cause current alarm maximum value electric energy and reactive energy 39 9 6 Method for various settings 40 9 6 1 Setting method for measurement related items 40 9 6 2 Setting method for alarms 42 9 6 3 Setting method for LCD 44 9 6 4 Setting method for date and time 46 9 6 5 Setting method f...

Страница 4: ... Altitude 2 000 m or lower 5 Operating storage atmosphere Must contain hardly any dust smoke corrosive gas combustible gas moisture salt etc If the ambient temperature of MDU Breaker exceeds 40 C use with a decreasing continuous load current Ambient temperature of 50 C 0 9 times ambient temperature of 60 C 0 7 times Do not install in abnormal environments subject to high temperature high humidity ...

Страница 5: ...DA DB DG SLD FG must always be tested together Measurement point test Between MDU terminals L1 L2 and MDU terminals DA DB DG SLD FG with CC Link communication 3 4 Insulation resistance measurement ON OFF Withstand voltage test ON OFF Test conditions 〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇 Status of handle Between live part and ground Between main circuit and MDU...

Страница 6: ... the connector connection area when opening closing the front door When bending the cable maintain a radius of at least 20 mm The connector area used to connect to the MDU is insulated from the inside of the MDU Breaker main unit The product will operate normally and will not break even if the MDU Breaker main unit is powered with the connector area disconnected open If a MDU will be installed lat...

Страница 7: ... any damage or the like caused by failures in the delivered product This free warranty does not apply to any damage or the like caused due to reprinting or reproducing the information included in this document in whole or in part in any form without the consent of Mitsubishi Electric All efforts have been made to keep the information in this document current as software and hardware is revised How...

Страница 8: ...er inspect the breaker one month after starting use and periodically thereafter according to the operation environment Yardstick for inspection periodicity Clean and dry environment 1 2 3 Once every 2 to 3 years Once a year Once every six months Environment not exposed to severe dust corrosive gas vapor salt etc Other places than 1 and 2 Criterion Inspection item 4 Check whether the temperature ha...

Страница 9: ...0 A Turn the dial in the direction of the arrow to the desired setting 3 Find the sticker for the set current setting from among the replacement stickers and stick the current setting sticker to the rated value display location on the handle 4 Close the transparent cover Affix a sealing sticker if required Precautions when setting short time delay tripping current Is and instantaneous tripping cur...

Страница 10: ...operating times can be confirmed by sending a current equivalent to 200 of current setting However if a current exceeding current setting is sent prior to this test the operating time will shorten and the first measurement will be invalid Tripping the MDU Breaker main unit will reset the trip circuit allowing the following operating time to be measured correctly 200 current 70 LED green PAL LED ye...

Страница 11: ...PALa 518 OALc 517 OALa Alarm name 4 2 Precautions for alarm contact output usage Control power is required for alarm contact output Connect control power to terminals L1 and L2 No polarity Rated voltage 100 to 240 VAC DC common 50 60 Hz VA consumption 5 VA Use a power supply to prevent power outages when the MDU Breaker is tripped Note that alarm contact output will not operate unless control powe...

Страница 12: ... sides of the MDU Breaker main unit in order to wire connection cables and attach connection cable connectors Caution Figure 2 800 A frame circuit breaker Figure 1 400 A frame circuit breaker Circuit breaker installation locations 4 MDU Breaker main unit MDU Breaker main unit Fixing screw M6 72 tightening torque 4 7 to 6 3 N m Circuit breaker installation locations 4 Fixing screw M6 35 tightening ...

Страница 13: ...ail IEC rail installation fastener 2 Push it in Removable connector Screws 3 Loosen the two screws of the removable connector and remove the connector IEC rail installation fastener 5 Pull up the unit 4 Lower the IEC rail installation fastener Installation groove Terminal cover When reattaching the removed terminal cover hook it up to the installation groove 3 Connection cable installation Open th...

Страница 14: ...aight Adequate tightening torque 0 5 to 0 6 N m Tool Flathead screwdriver Blade edge thickness 0 6 mm full width 3 5 mm Recommended screwdriver PHOENIX CONTACT screwdriver model SZS 0 6 3 5 Electric wire covering stripped length 7 mm Electric wire terminal treatment For a solid wire the electric wire can be connected with the covering stripped For a twisted wire strip the covering twist the core a...

Страница 15: ...se output function The pulse output line forms a small signal circuit Install it at least 10 cm away from strong circuits The wiring length is determined by various conditions such as the anti noise performance of the pulse receiver However the wiring should not exceed 100 m If using A C for the pulse output power supply make sure that the pulse receiver does not erroneously operate due to leak cu...

Страница 16: ...of measurement functions 2 Either the latest fault cause or the latest fault current is shown They are not displayed simultaneously 3 Electric energy pulse output and CC Link communication cannot be installed at the same time 4 The CC Link version is CC Link Ver 1 10 During MDU panel installation a CC Link cable part no FANC 110SBH manufactured by Kuramo Electric Co LTD is used from the front surf...

Страница 17: ...r all phase Maximum value occurrence time Maximum value Present value Maximum value occurrence time Maximum value Maximum value Present value Total harmonic average value Between each line Communication Display Display rauge The following table lists measurement elements and elements that can be communicated displayed Measurement elements that can be communicated and displayed I Load current 1 0 V...

Страница 18: ...calculated as follows when setting the phase and wire factory setting is three phase three wire for three pole products and three phase four wire for four pole products The present value of the maximum phase electric current and present value of the maximum phase electric current demand indicate the maximum value of the following phases via setting the phase and wire 4 The electric current demand ...

Страница 19: ...1 656 kvar 2 103 kW 2 103 kW 2 103 kvar 2 103 kvar 3 Electric power Reactive power 1 The present value is the effective value during a single cycle The electric power during reverse power flow is also measured 2 The demand time limit is a bulk setting value that includes other measurement elements Factory setting is two min 3 The measurement rated electric power reactive power measurement range an...

Страница 20: ...ergy and reactive energy are shown below 2 5 of actual value 0 0 45 0 to 65 0 Hz Accuracy Range 6 Frequency 1 The measurement accuracy and measurement range for the frequency are shown below Display 0 0 Hz Communication V12 and V32 are 0 V less than 22 V Less than 45 Hz 65 Hz exceeded Blinks at 45 0 Hz Blinks at 65 0 Hz Fixed at 45 0 Hz Fixed at 65 0 Hz 2 Display communication values will be as fo...

Страница 21: ...lues for all phases from when usage began after previous reset to now 5 The demand time limit is a bulk setting value that includes other measurement elements Factory setting is 2 min 6 Each phase total distortion ratio and each phase order 3rd 5th 7th 9th 11th 13th 15th 17th 19th content ratio are values calculated as follows IAH IH3 2 IH5 2 IH7 2 IH17 2 IH19 2 8 Fault current 1 The fault current...

Страница 22: ...e function is turned OFF when set to any other line system Load current pre alarm PAL Overcurrent alarm OVER Electric current demand alarm IDM_AL Electric current unbalance alarm IUB_AL Electric current open phase alarm ILA_AL Long time delay Short time delay Instantaneous Open close frequency Trip frequency Display Communication MDU Breaker alarm MDU Breaker status 1 The following table shows mon...

Страница 23: ...rm is removed Alarm details Setting method Reset method 1 PAL load current pre alarm 2 OVER overcurrent alarm The alarm is output to display over communication when the electric current demand value exceeds the pick up current Set via communication or on the display Function ON OFF Pick up current 50 to 100 per 1 Demand time limit 1 to 10 min per 1 min 15 20 25 30 min Factory setting is OFF Set to...

Страница 24: ...the measurement rated current The alarm is output to display over communication when an energization phase equal to or less than the maximum phase current 30 is generated when monitoring starts and after 30 seconds have passed Set via communication or on the display Function ON OFF Factory setting is OFF Pick up current 30 fixed no settings Operating time 30 s fixed no settings Set to either self ...

Страница 25: ...display Sets the upper limit setting value and lower limit setting value via communication Cannot be set on display Upper limit setting value Sets the upper limit for the measurement value Sets the lower limit for the measurement value Lower limit setting value Upper limit monitoring Lower limit monitoring Monitoring Type Generation Recovery Generation Recovery Alarm generation condition Measureme...

Страница 26: ...n the line system is set to single phase three wire system The function is turned OFF when set to any other line system Item Output elements Contact capacity Output pulse unit Output pulse width Max wiring length Solid state relay SSR No voltage a contact 113 and 114 terminals no polarity Compatible with 24 VDC and 100 to 200 VAC 20 mA 1 10 100 1000 and 10000 kWh pulse settable 0 35 to 0 45 s 100 ...

Страница 27: ...oad side terminal is not provided Terminal layout chart 1 SLD DG DB DA 113 114 2 3 4 5 6 Do not connect anything to unused terminals Do not use such terminals for connecting The MDU may break down if unused terminals are connected for use Caution Operation switch area MDU Display Terminal cover Connector cover Operation switch area ENTER Center SELECT Right RETURN Left UP Up DOWN Down 7 Names and ...

Страница 28: ...eset switch 4 CC Link communication LEDs The CC Link communication LEDs indicate the status of the transmission signal line and the error status of the MDU LED name L ERR LED SD LED RD LED L RUN LED Details ON Communication normal OFF Communication stopped ON Communication data error Blinking Communication data error OFF Communication normal Turns ON when sending data Turns ON when receiving data ...

Страница 29: ... a Number of units occupying one station this applies to the MDU b Number of units occupying two stations c Number of units occupying three stations d Number of units occupying four stations Number of connectable units in condition 2 16 A 54 B 88 C 2304 A Number of remote I O single stations 64 B Number of remote device stations 42 this applies to the MDU C Number of local stations 26 If only MDUs...

Страница 30: ...e to SLD on each unit Use FG on each unit as the dedicated ground Use class D grounding If a dedicated ground cannot be used use a common ground as shown in the figure below If the MDU is at the end of the CC Link transmission line connect a terminator between DA and DB in the MDU terminal block Prepare the terminator included with the master unit as shown in the figure below Preparation method 1 ...

Страница 31: ... regard to power factor this means that a display value up to around 0 3 LEAD forward 99 7 to LAG delay 99 7 at 100 and around 6 64 9 to 76 0 at 70 7 of LEAD or LAG will be allowed Measurement display value 45 45 0 Power factor 99 7 100 99 7 Permissible error range 70 7 76 0 70 7 64 9 4 5 4 5 5 of 90 Permissible error range Forward LEAD Delay LAG 1 Electric current measurement accuracy The MDU ele...

Страница 32: ...er outage restoration The electric energy integrated value and reactive energy integrated value are stored in non volatile memory when measurement values are updated or there is a power outage When power is restored it will continue measuring from the data that was stored prior to the power outage Setting values are stored in non volatile memory when set so they do not need to be set again when po...

Страница 33: ...aracteristics Refer to section 9 3 Select this item to display the alarm status Refer to section 9 4 Select this item to make reset operations Refer to section 9 5 Select this item to make settings Refer to section 9 6 DOWN UP DOWN UP DOWN UP DOWN UP 9 MDU Operation Procedure To set the display items and functions use the operation switches as shown in the figure below Some models do not measure o...

Страница 34: ...lectric energy display screen 2 Current of each phase The measured current values of the phases are displayed Use SELECT to switch display screens Present current display screen Present current demand display screen Maximum all phase demand display screen 1 phase 2 phase 3 phase N phase Only 4 pole product EP Electric energy I Load current V Line voltage P Electric power Q Reactive power PF Power ...

Страница 35: ...witch display screens Present power factor display screen Maximum power factor display screen SELECT SELECT SELECT SELECT SELECT To Present electric power display screen SELECT To Present reactive power display screen Occurrence date and time Occurrence date and time Occurrence date and time Demand time limit Demand time limit LAG Delay LEAD Forward SELECT SELECT D e m d 100 3 D T 1 2 min k W P P ...

Страница 36: ...5 N 8 40 SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT 1 phase 2 phase 3 phase N phase Only 4 pole product 1 phase 2 phase 3 phase N phase SELECT To Present harmonic current display screen 10 Maximum harmonic current The maximum harmonic current and maximum value occurrence time of each harmonic order are displayed Use SELECT to switch display screens Display switches as follows Fundamen...

Страница 37: ... k v a r h 2 9 4 8 1 Seq O I S P E A G N 20 EQ D e k v a m r d h 184 34 0 0 0 1 0 1 0 1 7 1 50 7 a r h k v x D e m d EQ M a Highlighted SELECT SELECT Occurrence date and time 13 Phase sequence The phase sequence of the main circuit is displayed Enabled during three phase three wire system Displayed as when disabled Phase sequence display screen SELECT To Reactive energy display screen POSI Positiv...

Страница 38: ... screen To LTD setting value display screen Select with UP DOWN Select with UP DOWN Select with UP DOWN P L T I r L C O T E D T R T A 400 Ir setting value Select with UP DOWN TL setting value 2 Long limit operating time TL check Select TL in the LTD setting value display screen The long limit operating time TL setting value of the MDU Breaker main unit can be checked I6 t ON OFF Select with UP DOW...

Страница 39: ...ue display screen 4 Short time delay operating time Ts check The short time delay operating time Ts setting value can be checked in the STD INST setting value display screen E R R O T E C T P P R O T E C T E R E R T I N S S T D T D L C T R O T E P Protection characteristics selection screen Select with UP DOWN ENTER RETURN DOWN UP Screen 1 Screen 2 Screen 3 Ir Ii TL Is Ts I6 t I2 t I n Te Current ...

Страница 40: ...yed before the alarm display screen was displayed The output alarm is also reset 9 4 Fault Alarm display methods and display contents ENTER RETURN DOWN UP Select RESET in the main menu screen and press ENTER to switch to the reset screen The options switch as follows TRIP ALARM ALL EP Wh EQ varh TRIP Select the item that you wish to reset and apply the selection with ENTER Select YES in the allow ...

Страница 41: ...h no phase switching or Inverse with phase switching with UP DOWN and apply the setting with ENTER Select YES on the allow changes screen and press ENTER to decide the setting Screen 4 Y E N O T O K S S E W N O T T I N G S E P s n y e S m h D e a P E T S s e d L i u l s e a n e s a s e o r m E C N e r A H n v I G l a h S E T N P s e l e v m a r s r a o S e E T n I h P N Measurement setting selecti...

Страница 42: ...creen Screen 1 Press ENTER to switch to the line system display screen Screen 2 Next press ENTER to enable changes in the line system display screen Screen 3 Select one of the following with UP DOWN 1P2W single phase two wire 1P3W single phase three wire 3P3W three phase three wire 3P4W three phase four wire Only for 4 pole product Press ENTER to decide the setting Select YES on the allow changes ...

Страница 43: ...d L A _ _ A L _ A L B I U L A I L I A M _ D P A L S E T ON OFF setting Demand time limit setting Allow changes screen Screen 4 Screen 5 Screen 6 ENTER RETURN ENTER RETURN ENTER RETURN ENTER RETURN ENTER RETURN Select with UP DOWN Select with UP DOWN Change with UP DOWN Change with UP DOWN IDM_AL ON OFF IDM_AL Pickup current setting value IDM_AL Demand time limit setting value 2 Electric current de...

Страница 44: ... UP DOWN Select with UP DOWN Select with UP DOWN ILA_AL ON OFF IUB_AL ON OFF Select NO YES with UP DOWN Select NO YES with UP DOWN 4 Electric current unbalance alarm IUB_AL setting Select IUB_AL on the alarm setting selection screen Screen 1 Press ENTER to switch to the electric current unbalance alarm setting display screen Screen 2 Press ENTER again select ON function enabled or OFF function dis...

Страница 45: ...ENTER RETURN 1 LCD backlight setting Default value AutoOFF auto shutoff Select LCD BL on the LCD setting selection screen and press ENTER to switch to the LCD backlight setting display screen Screens 1 2 AutoOFF Auto shutoff The light automatically turns off when no operation is made for approximately 5 minutes The light turns on again with switch operation Select ON ON at all times or OFF OFF at ...

Страница 46: ...irection display Select Direction on the LCD setting selection screen Screen 1 Press ENTER to open the display direction setting display screen Screen 2 Press ENTER and select one from the following options 1 2 Vertical direction display Horizontal direction display 1 Horizontal direction display 2 Apply the setting with ENTER Screen 3 Select YES on the allow changes screen and press ENTER to deci...

Страница 47: ...tting method for electric energy Y E N O T O K S S E k W h 3 5 741 S E P 3 E T E T 3 S E P 74153 k W h 3 E E P H C A N G E 5 k W 4 T S 3 1 7 h S E T E P E Q h v a r W h Electric energy setting selection screen Screen 1 Electric energy setting display screen Leftmost digit setting Rightmost digit setting Allow changes screen Screen 2 Screen 3 Screen 4 1 Electric energy setting Select EP Wh in the e...

Страница 48: ...Screen 1 Press ENTER to enable the setting of reactive energy Screen 2 Press ENTER or SELECT to toggle the options between Leftmost digit Rightmost digit or press RETURN to toggle in the reverse direction from Rightmost digit Leftmost digit Screens 2 3 Select a digit to change the value After setting the rightmost digit press ENTER to display the allow changes screen Select YES and press ENTER to ...

Страница 49: ...ne voltage Present electric power Present voltage demand Maximum electric power demand Present reactive power Present reactive voltage demand Present power factor Maximum power factor Maximum reactive power demand Present voltage between N phases Maximum voltage 9 7 Measurement display list 1 Vertical display Electric energy One hour electric energy Maximum one hour electric energy Present current...

Страница 50: ... 9 t h x HI M a 7 0 4 2 2 0 0 x 1 0 2 2 0 2 3 1 7 0 4 274 0 D e A T 2 min D m d HI M a 30 2 20 5 11 8 40 8 2 N 3 A 1 2 min D e m d D T 1 HI h EQ k v a r 18249 34 EQ M a x D e m d k v a r h 750 1 7 1 0 1 0 1 0 0 0 EQ D e m d k v a r h 20184 Seq POSI NEGA 8 Present harmonic current 2 Horizontal display Electric energy 1 Electric energy Compound 2 Current of each phase 3 Line voltage 4 Electric power...

Страница 51: ...e used to set and clear the items described in 9 5 Method for resetting fault cause current alarm maximum value electric energy and reactive energy and 9 6 Method for various settings When items are set or cleared the non volatile memory storage will be overwritten for all of these except for the items described in 9 6 4 Setting method for date and time It takes some time to overwrite the non vola...

Страница 52: ...DY Initial data processing request flag Initial data processing complete flag The MDU uses 32 input contacts and 32 output contacts when sending and receiving data with the master unit The following table shows I O signal assignment and signal names Device RX indicates an input signal from the MDU to the master unit while device RY indicates an output signal from the master unit to the MDU Device ...

Страница 53: ...r status is released when the error reset status flag is set to 1 ON if there is an error in the retransmitted data the error status flag will once again be set to 1 ON Therefore refer to the error code and eliminate the cause of the error prior to retransmitting 10 7 Troubleshooting Check the following if your device appears to be failing 1 Is the MDU applied control power 2 Nothing is displayed ...

Страница 54: ...30 57 4 4441284 20 2 27961337 30 211 1206 900 91 124 4630300 62 0 21 6610651 9 856 20 415899 356 0 21 697 816 95 0 1 202589 977 1 4411330 47 0 55 506000 92 0 42 35752323 92 0 42 35753373 92 0 42 37631632 63 0 2 634 8691 966 1 4770149 65 6473 2308 34 0 93 565 3131 58 212 241 9952 84 28 3910 5945 84 24 3937 8075 ...

Страница 55: ......

Страница 56: ...LN107A329H02 IB63E31 A 1911 MEE MDU Breakers Nov 2019 ...

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