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L3016

1SDH000559R0002

ABB SACE

SACE PR021/K

5.9.2. Signals

The signals (K51/1...K51/8) for the SACE PR222DS protection release may be divided into 2 modes: Normal and Latch.

A description of the signals in these modes is given below.

5.9.2.1.

Normal mode (see par. 4.5.1)

Dip-switch no. 11 to be set to its OFF position.

Note 1:

Following a TRIP, the status of the signals is frozen signalling the trip (K51/7) and the protection that caused
it.

Note 2: If dip switch no. 10 (RESET) is set to its “MAN” position, the signals may be reset as described in par. 4.2.
Note 3: If dip switch no. 10 (RESET) is set to its “AUT” position, the signals are reset automatically when the trip on

the protection unit is reset (see par. 4.2).

Note 4: Use of the PR010/T test unit interrupts communication with the PR021/K unit, which will signal a

communication error on the local bus by closing the K51/5 contact.

5.9.2.2.

Latch mode (see par. 4.5.2)

Dip-switch no. 11 to be set to its ON position.

Electric

contact

Event that caused closing of the relay

K51/1

L protection alarm or trip (overload)

K51/2

S protection alarm or trip (selective short-circuit)

K51/3

I protection trip (instantaneous short-circuit)

K51/4

G protection alarm or trip (earth fault)

K51/5

Communication problems on the local bus (bus KO)

K51/6

Protection release TRIP alarm

K51/7

Protection release TRIP alarm

K51/8

L function prealarm (overload)

Electric

contact

Event that caused closing of the relay

Selection of dip-switches

no. 2, 3, 4

A = L protection alarm (overload)

dip no. 2 = A

B = L protection trip (overload)

dip no. 2 = B

A = S protection alarm (selective short-circuit)

dip no. 3 = A

B = S protection trip (selective short-circuit)

dip no. 3 = B

K51/3

I protection trip (instantaneous short-circuit)

---

A = G protection alarm (earth fault)

dip no. 4 = A

B = G protection trip (earth fault)

dip no. 4 = B

K51/5

Communication problems on the local bus (bus KO)

---

K51/6

Protection release TRIP alarm

---

K51/7

Protection release TRIP alarm

---

K51/8

L function prealarm (overload)

---

K51/1

K51/4

K51/2

Содержание SACE PR021/K

Страница 1: ...1 52 L3016 1SDH000559R0002 ABB SACE SACE PR021 K SACE PR021 K SIGNALLING UNIT EN ...

Страница 2: ...NSTALLATION AND SETUP 12 5 1 INSTALLATION INSTRUCTIONS 12 5 2 CONNECTIONS 12 5 3 DIP SWITCH SETTINGS 13 5 3 1 Example of dip switch setting 14 5 3 2 Default settings 15 5 3 3 Serial Number 15 5 4 SACE PR021 K WITH SACE PR112 UNIT VERSION WITH KEY 15 5 4 1 Dip switch settings 15 5 4 2 Signals 16 5 5 SACE PR021 K WITH SACE PR112 UNIT VERSION WITHOUT KEY 17 5 5 1 Dip switch settings 17 5 5 2 Signals ...

Страница 3: ... 5 14 SACE PR021 K WITH SACE PR331 P UNIT 38 5 14 1 Dip switch settings 38 5 14 2 Signals 39 5 15 SACE PR021 K WITH SACE PR332 P unit 41 5 15 1 Dip switch settings 41 5 15 2 Signals 42 5 16 SACE PR021 K WITH SACE PR333 P unit 43 5 16 1 Dip switch settings 43 5 16 2 Signals 44 5 17 WIRING DIAGRAMS 46 5 17 1 PR112 PR113 PR121 PR122 PR123 PR331 PR332 PR333 PR021 K 46 5 17 2 PR113 P PR121 P PR122 P PR...

Страница 4: ...t sheet of PR212MP protection unit doc no RH0063 Kit sheet of PR222MP protection unit doc no 1SDH000436R0506 User manual for PR112 P protection unit doc no RH0288 for IEC version or RH0109 for UL version User manual for PR113 P protection unit doc no RH0288 for IEC version or RH0109 for UL version UsermanualforPR222DSprotectionunit doc no 1SDH000436R0502forIECversionor1SDH000549R0001forUL version ...

Страница 5: ...n internal communication unit when required Connectionsbetweenvariousunits dependingonthescenario MasterorSlavemode areshownasaguidingreference only therefore wiring must be carried out according to official ABB SACE documentation PR021 K Signalling unit Protection unit Local bus PR021 K Slave PR021 K Slave Local bus Protection unit PR021 K Master PR021 K Signalling unit Local bus Protection unit ...

Страница 6: ...ristics Casing Polyamide plastic no metal parts Protectiongrade IP20 Dimensions 95 x 53 x 112mm h x l x d Weight 330g including 2 front connectors 2 3 Environmental conditions Operatingenvironmentaltemperature 5 C 70 C Storagetemperature 40 C 90 C Relative humidity 5 90 without condensation Atmosphericpressure 1bar 0 2000m 2 4 Communication Bus Exclusive ABB SACE communication bus local bus 2 5 In...

Страница 7: ... the user wish to customize the LEDs the customizable adhesive rating plate may be used RE0433 001 supplied together with the SACE PR021 K unit Terminal boxes see par 3 3 Push button see par 3 1 LEDs see par 3 2 The area bordered by a dashed line is intended for the possible application of a customizableadhesive rating plate Areas to be cutomized by user ...

Страница 8: ...reen Contact K51 3 open Contact K51 3 closed K51 4 green Contact K51 4 open Contact K51 4 closed K51 5 green Contact K51 5 open Contact K51 5 closed K51 6 green Contact K51 6 open Contact K51 6 closed K51 7 green Contact K51 7 open Contact K51 7 closed K51 8 green Contact K51 8 open Contact K51 8 closed PR021 K Operating conditions Description of LEDs LED state PW WD TX RX GREEN OFF If PR021 K is ...

Страница 9: ...ting state which does not conform with the above conditions probably indicates a malfunction of the SACE PR021 K unit The indications given in the above table are with Vaux installed For further details of possible malfunction conditions see par 6 3 3 Terminal boxes Connections 1 26 inputs and outputs of PR021 K unit see pars 5 1 and 5 2 Signal Priority Bus KO high priority Missing identification ...

Страница 10: ...he self test dip switch no 1 must be set to ON see par 5 3 then the reset push button is pressed The self test switches all 8 internal relays of the unit in sequence and activates the related indicator LED K51 1 K51 8 see par 3 2 The Tx Rx LED lights on each switching and once the self test is finished it will flash according to the indications listed in par 3 2 The self test takes approx 10s ther...

Страница 11: ...ode with AUTOMATIC RESET enabled To select the Automatic Reset function dip switch no 10 will be set to AUT see par 5 3 thereafter press the reset push button or switch PR021 K off and on In this operating mode the signals are the same as in Normal mode see par 4 5 1 1 the only difference being that to exit from frozen status following a TRIP the trip can be directly reset on the protection unit s...

Страница 12: ...d 10A for a maximum of 2 seconds An earth terminal is provided on a front connector to connect the electronic circuit to the installation earth Dielectric strength tests must not be carried out on the inputs and outputs of the PR021 K unit Although the PR021 K unit can be installed in the circuit breaker compartment it is good practice to install the unit in the instrument compartment on the switc...

Страница 13: ...ts switch when the conditions which normally cause switching exist normal operating and the related indicator LED lights Stand by mode ensures that the K51 contacts do not switch under any circumstances even under conditions which would normally cause switching the indicator LEDs K51 1 K51 8 will still light If set to ON Stand by the unit is not able to carry out a self test performs the self test...

Страница 14: ...ing for connecting the PR021 K unit 12 13 Dip sw description No 1 2 3 4 5 6 7 8 9 10 11 TEST EN K51 Configuration B K51 Configuration A K51 Configuration B K51 Configuration A MODE MASTER BAUD 19 2kb s K51 EN PROG OFF RESET MAN LATCH OFF Term OFF N U OFF Dip switches for setting theoperatingmode PR021 K top view ...

Страница 15: ...BAUD 19 2kbit s 8 K51 EN 9 PROG OFF 10 RESET MAN 11 LATCH OFF 12 Term OFF 13 N U OFF K51 CONFIGURATION Mode A DIS Self test enabled EN Self test disabled 2 A B 3 A B 4 A B 5 A Not used set A MASTER Master scenario Master unit in mixed Master Slave scenario 7 BAUD 19 2kbit s Set 19 2 kbit s EN Operating mode DIS Stand by mode enabled 9 PROG OFF Set this dip switch to OFF MAN Manual Reset mode AUT A...

Страница 16: ... 1 Following a TRIP the status of the signals is frozen signalling the trip K51 7 and the protection that caused it Note 2 If dip switch no 10 RESET is set to its MAN position the signals may be reset as described in par 4 2 Note 3 If dip switch no 10 RESET is set to its AUT position the signals are reset automatically when the trip on the protection unit is reset see par 4 2 1 2 3 4 5 6 7 8 9 10 ...

Страница 17: ...on alarm earth fault dip no 4 A B G protection trip earth fault dip no 4 B K51 5 Communication problems on the local bus bus KO K51 6 Internal overtemperature alarm K51 7 Protection release TRIP alarm K51 8 L function prealarm overload K51 1 K51 2 K51 4 DIS Self test enabled EN Self test disabled 2 A B 3 A B 4 A B 5 A Not used set A MASTER Master scenario Master unit in mixed Master Slave scenario...

Страница 18: ...ncluded in the set of signals for example a trip for protection G has occurred but the K51 4 relay was set for the Function L prealarm signal only the K51 7 relay the protection release TRIP alarm will be switched 5 5 2 Signals The signals K51 1 K51 8 for the SACE PR112 protection release may be divided into 2 modes Normal and Latch A description of the signals in these modes is given below 5 5 2 ...

Страница 19: ...prealarm overload dip no 2 B A Communication problems on the local bus bus KO dip no 3 A B Internal overtemperature alarm dip no 3 B K51 6 LC1 load control K51 7 Protection release TRIP alarm K51 8 LC2 load control K51 1 K51 4 K51 5 DIS Self test enabled EN Self test disabled 2 A B 3 A B 4 A B 5 A B MASTER Master scenario Master unit in mixed Master Slave scenario 7 BAUD 38 4kb s Set 38 4 kbit s E...

Страница 20: ...of the protection trip Note 3 If dip switch no 10 RESET is set to its MAN position the signals may be reset as described in par 4 2 Note 4 If dip switch no 10 RESET is set to its AUT position the signals are reset automatically when the trip on the protection unit is reset see par 4 2 Note 5 If a trip is caused by a protection function not included in the set of signals for example a trip for prot...

Страница 21: ... to be set as follows Dip switch no 5 A Dip switch no 11 ON Electric contact Event that caused closing of the relay Selection of dip switches no 2 3 4 A L protection alarm overload dip no 2 A B L function prealarm overload dip no 2 B K51 2 S protection alarm selective short circuit K51 3 I protection trip instantaneous short circuit A G protection alarm earth fault dip no 3 A B Minimum voltage coi...

Страница 22: ...mode Latch mode disabled Local bus not terminated OFF ON 1 2 3 4 5 6 7 8 9 10 11 12 13 DIS Self test enabled EN Self test disabled 2 A B 3 A B 4 A B 5 A Not used set A MASTER Master scenario Master unit in mixed Master Slave scenario 7 BAUD 38 4kb s Set 38 4 kbit s EN Operating mode DIS Stand by mode enabled 9 PROG OFF Set this dip switch to OFF MAN Manual Reset mode AUT Automatic Reset mode OFF N...

Страница 23: ...ent that caused closing of the relay K51 1 L protection alarm or trip overload K51 2 S protection alarm or trip selective short circuit K51 3 I protection trip instantaneous short circuit K51 4 G protection alarm or trip earth fault K51 5 Communication problems on the local bus bus KO K51 6 Protection release TRIP alarm K51 7 Protection release TRIP alarm K51 8 L function prealarm overload Electri...

Страница 24: ...aud rate 38 4Kb s Stand by function not active Manual Reset mode Latch mode disabled Local bus not terminated OFF ON 1 2 3 4 5 6 7 8 9 10 11 12 13 Dip sw no Dip sw name Setting Notes DIS Self test enabled EN Self test disabled 2 A B 3 A B 4 A B 5 A Not used set A 6 MODE MASTER Set Master 7 BAUD 38 4kb s Set 38 4 kbit s EN Operating mode DIS Stand by mode enabled 9 PROG OFF Set this dip switch to O...

Страница 25: ... switch no 11 to be set to its ON position Electric contact Event that caused closing of the relay Selection of dip switches no 2 3 4 K51 1 L protection alarm or trip overload K51 2 R protection alarm or trip locked rotor K51 3 I protection trip instantaneous short circuit A U protection alarm or trip phase loss dip no 2 A B CW alarm or trip contacts worn dip no 2 B K51 5 Communication problems on...

Страница 26: ...unction disabled K51 configuration A A A A Master mode Baud rate 19 2Kb s Stand by function not active Manual Reset mode Latch mode disabled Local bus not terminated Dip sw no Dip sw name Setting Notes DIS Self test enabled EN Self test disabled 2 A B 3 A B 4 A B 5 A Not used set A 6 MODE MASTER With PR222DS the only scenario available is the Master scenario 7 BAUD 19 2kb s Set 19 2 kbit s EN Oper...

Страница 27: ...h mode see par 4 5 2 Dip switch no 11 to be set to its ON position Electric contact Event that caused closing of the relay K51 1 L protection alarm or trip overload K51 2 S protection alarm or trip selective short circuit K51 3 I protection trip instantaneous short circuit K51 4 G protection alarm or trip earth fault K51 5 Communication problems on the local bus bus KO K51 6 Protection release TRI...

Страница 28: ...ration A A A A Master mode Baud rate 19 2Kb s Stand by function not active Manual Reset mode Latch mode disabled Local bus not terminated OFF ON 1 2 3 4 5 6 7 8 9 10 11 12 13 Dip sw no Dip sw name Setting Notes DIS Self test enabled EN Self test disabled 2 A B 3 A B 4 A B 5 A B 6 MODE MASTER With PR223EF the only scenario available is the Master scenario 7 BAUD 19 2kb s Set 19 2 kbit s EN Operatin...

Страница 29: ...10 2 2 Latch mode see par 4 5 2 The dip switches are to be set as follows Dip switch no 5 A Dip switch no 11 ON Electric contact Event that caused closing of the relay Selection of dip switches no 2 3 4 K51 1 L protection alarm or trip overload K51 2 S protection alarm or trip selective short circuit K51 3 I or EF protection trip instantaneous short circuit K51 4 G protection alarm or trip earth f...

Страница 30: ...gured by user on the PR223EF unit K51 2 Configured by user on the PR223EF unit K51 3 Configured by user on the PR223EF unit K51 4 Configured by user on the PR223EF unit K51 5 Communication problems on the local bus bus KO K51 6 Configured by user on the PR223EF unit K51 7 Configured by user on the PR223EF unit K51 8 Configured by user on the PR223EF unit Dip sw no Dip sw name Setting Notes DIS Sel...

Страница 31: ... 7 and the protection that caused it Note 2 The signals bearing this marking are not frozen as indicated in Note 1 Note 3 If dip switch no 10 RESET is set to its MAN position the signals may be reset as described in par 4 2 Note 4 If dip switch no 10 RESET is set to its AUT position the signals are reset automatically when the trip on the protection unit is reset see par 4 2 Electric contact Event...

Страница 32: ...verload dip no 2 B A S protection alarm selective short circuit dip no 3 A B S protection trip selective short circuit dip no 3 B K51 3 I protection trip instantaneous short circuit K51 4 G protection alarm earth fault K51 5 Communication problems on the local bus bus KO K51 6 L function prealarm overload K51 7 Protection release TRIP alarm A Backup protection alarm dip no 4 A B Hardware alarm dip...

Страница 33: ... Reset mode Latch mode disabled Local bus not terminated OFF ON 1 2 3 4 5 6 7 8 9 10 11 12 13 Dip sw no Dip sw name Setting Notes DIS Self test enabled EN Self test disabled 2 A B 3 A B 4 A B 5 A B MASTER Master scenario Master unit in mixed Master Slave scenario 7 BAUD 19 2kb s Set 19 2 kbit s EN Operating mode DIS Stand by mode enabled 9 PROG OFF Set this dip switch to OFF MAN Manual Reset mode ...

Страница 34: ...e switched 5 12 2 2 Latch mode see par 4 5 2 The dip switches are to be set as follows Dip switch no 5 A Dip switch no 11 ON Electric contact Event that caused closing of the relay Selection of dip switches no 2 3 4 K51 1 L protection alarm overload K51 2 S protection alarm selective short circuit K51 3 I protection trip instantaneous short circuit A G protection alarm earth fault dip no 2 A B LC1...

Страница 35: ...gured by user on the PR122 P unit K51 2 Configured by user on the PR122 P unit K51 3 Configured by user on the PR122 P unit K51 4 Configured by user on the PR122 P unit K51 5 Communication problems on the local bus bus KO K51 6 Configured by user on the PR122 P unit K51 7 Configured by user on the PR122 P unit K51 8 Configured by user on the PR122 P unit Dip sw no Dip sw name Setting Notes DIS Sel...

Страница 36: ...he signals may be reset as described in par 4 2 Note 4 If dip switch no 10 RESET is set to its AUT position the signals are reset automatically when the trip on the protection unit is reset see par 4 2 Note 5 If a trip is caused by a protection function not included in the set of signals for example a trip for protection G hasoccurredbuttheK51 4relaywassetforthe LC1loadcontrol signal onlytheK51 7r...

Страница 37: ...tection alarm selective short circuit K51 3 I protection trip instantaneous short circuit A G protection alarm earth fault dip no 2 A B LC1 load control dip no 2 B K51 5 Communication problems on the local bus bus KO A L Function prealarm overload dip no 3 A B LC2 load control dip no 3 B K51 7 Protection release TRIP alarm A Backup protection alarm dip no 4 A B Hardware alarm dip no 4 B K51 8 K51 ...

Страница 38: ... Reset mode Latch mode disabled Local bus not terminated OFF ON 1 2 3 4 5 6 7 8 9 10 11 12 13 Dip sw no Dip sw name Setting Notes DIS Self test enabled EN Self test disabled 2 A B 3 A B 4 A B 5 A B MASTER Master scenario Master unit in mixed Master Slave scenario 7 BAUD 19 2kb s Set 19 2 kbit s EN Operating mode DIS Stand by mode enabled 9 PROG OFF Set this dip switch to OFF MAN Manual Reset mode ...

Страница 39: ...tch no 5 A Dip switch no 11 ON Electric contact Event that caused closing of the relay Selection of dip switches no 2 3 4 K51 1 L protection alarm or trip overload K51 2 S protection alarm or trip selective short circuit K51 3 I protection trip instantaneous short circuit K51 4 G protection alarm or trip earth fault K51 5 Communication problems on the local bus bus KO K51 6 L function prealarm ove...

Страница 40: ...ct which indicates the Communication problems on the local bus bus KO function Electric contact Event that caused closing of the relay K51 1 Configured by user on the PR331 P unit K51 2 Configured by user on the PR331 P unit K51 3 Configured by user on the PR331 P unit K51 4 Configured by user on the PR331 P unit K51 5 Communication problems on the local bus bus KO K51 6 Configured by user on the ...

Страница 41: ... Reset mode Latch mode disabled Local bus not terminated OFF ON 1 2 3 4 5 6 7 8 9 10 11 12 13 Dip sw no Dip sw name Setting Notes DIS Self test enabled EN Self test disabled 2 A B 3 A B 4 A B 5 A B MASTER Master scenario Master unit in mixed Master Slave scenario 7 BAUD 19 2kb s Set 19 2 kbit s EN Operating mode DIS Stand by mode enabled 9 PROG OFF Set this dip switch to OFF MAN Manual Reset mode ...

Страница 42: ...e switched 5 15 2 2 Latch mode see par 4 5 2 The dip switches are to be set as follows Dip switch no 5 A Dip switch no 11 ON Electric contact Event that caused closing of the relay Selection of dip switches no 2 3 4 K51 1 L protection alarm or trip overload K51 2 S protection alarm or trip selective short circuit K51 3 I protection trip instantaneous short circuit A G protection alarm or trip eart...

Страница 43: ...figured by user on the PR332 P unit K51 5 Communication problems on the local bus bus KO K51 6 Configured by user on the PR332 P unit K51 7 Configured by user on the PR332 P unit K51 8 Configured by user on the PR332 P unit Example of dip switch settings for the PR021 K unit to be connected to the SACE PR333 P release Dip sw no Dip sw name Setting Notes DIS Self test enabled EN Self test disabled ...

Страница 44: ...he signals may be reset as described in par 4 2 Note 4 If dip switch no 10 RESET is set to its AUT position the signals are reset automatically when the trip on the protection unit is reset see par 4 2 Note 5 If a trip is caused by a protection function not included in the set of signals for example a trip for protection G hasoccurredbuttheK51 4relaywassetforthe LC1loadcontrol signal onlytheK51 7r...

Страница 45: ... alarm A Backup protection alarm dip no 4 A B Hardware alarm dip no 4 B K51 8 K51 4 K51 6 5 16 2 3 User mode see par 4 5 3 The dip switches are to be set as follows Dip switch no 5 B Dip switch no 11 ignored All contacts K51 1 K51 8 are associated exclusively with the function selected on the PR333 P unit by the user except the K51 5 contact which indicates the Communication problems on the local ...

Страница 46: ...3 PR331 PR332 PR333 PR021 K 24V K51 4 A13 K51 1 14 12 16 K51 2 K51 3 13 11 15 22 18 20 K51 5 K51 6 24 26 K51 K51 7 8 21 17 19 23 25 10 1 2 PR021 K 7 8 PR113 P Emax Q PR113 PD PR112 PD PR112 P PR123 P PR122 P PR121 P K51 K1 K2 W3 W4 PR121 P PR333 PR122 P PR112 P PR123 P PR112 PD PR331 PR113 P PR332 PR113 PD ...

Страница 47: ... 6 24 26 K51 K51 7 8 21 17 19 23 25 10 1 2 PR021 K 7 8 PR113 P K51 K51 4 K51 1 14 12 16 K51 2 K51 3 13 11 15 22 18 20 K51 5 K51 6 24 26 K51 K51 7 8 21 17 19 23 25 10 1 2 PR021 K 7 8 A13 K51 4 K51 1 14 12 16 K51 2 K51 3 13 11 15 22 18 20 K51 5 K51 6 24 26 K51 K51 7 8 21 17 19 23 25 10 1 2 PR021 K 7 8 A13 n 1 n 2 n 3 Q Emax PR123 P PR122 P K1 K2 W3 W4 PR123 P PR331 PR122 P PR332 PR113 P PR333 PR121 ...

Страница 48: ...or PR212MP PR021 K N B The PR212MP is only available for 3 pole circuit breakers PR212 P 4 5 6 Q K51 24V 23 K51 7 A11 7 2 PR021 K 8 25 21 K51 8 1 26 19 K51 5 17 15 4 K51 16 K51 6 13 K51 3 11 2 K51 1 K51 A13 PR212MP 12 14 18 20 22 24 10 Isomax X4 1 X4 2 X4 3 X3 3 X3 2 ...

Страница 49: ...7 4 PR212 P PR212 D L or PR212 D M PR021 K Q 8 10 9 K51 5 4 PR212 P PR212 D M A11 PR212 D L 7 8 2 1 PR021 K 25 23 8 7 K51 26 21 19 6 K51 17 5 K51 K51 15 4 K51 13 2 K51 3 K51 16 11 1 K51 A13 18 14 12 20 22 24 10 7 6 24V Q Q Isomax X3 2 X3 3 X4 1 X4 2 X4 3 ...

Страница 50: ...SACE PR021 K 5 17 5 PR222 PR223 PR222MP PR021 K 25 23 21 17 19 K51 8 10 26 24 K51 6 5 K51 22 18 20 K51 7 PR021 K 15 13 A13 11 K51 4 K51 2 3 K51 16 14 1 K51 8 7 2 1 12 K51 X3 1 X3 2 X3 4 X3 3 24V PR223EF Q PR223DS PR222DS PD Q Tmax PR222MP ...

Страница 51: ...ing unit PR021 K K51 Protection unit PR212 P PR212 MP PR112 P PR112 PD PR113 P and PR113 PD K51 1 8 Internal relays of signalling unit PR021 K X3 X4 Connectors for auxiliary circuits of protection unit PR212 P or PR212 MP X Delivery connector for auxiliary circuits of withdrawable circuit breaker XV Delivery terminal box for the auxiliary circuits of the fixed circuit breaker ...

Страница 52: ...regular situation Contact ABB SACE 8 The PW WD LED is flashing red PR021 K in programming mode Check the PROG dip switch 1 Relays do not switch even under the conditions required for switching for example an overload with L protection function 2 The unit does not update signals 3 The signals cannot be reset after a protection release trip despite pressing the reset push button The connected protec...

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