Siemens 3RB12 Instructions Manual Download Page 15

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Operation

3ZX1012-0RB12-1AA1

glis

4.4

Test

Statuses after the Test/Reset button has been pressed:

Test Status

Without
main current

With
main current*

button O.k.

Faulty

O.k.

Faulty

Press for

up to 2 s

LED Ready

LED Gen. Fault

LED Overload

Status of auxiliary
switching elements

unchanged

Press for

after 2 s

LED Ready

LED Gen. Fault

LED Overload

Status of auxiliary
switching elements

un-
changed

Reset**

un-
changed

Reset**

Press for

> 5 s

LED Ready

LED Gen. Fault

LED Overload

Status of auxiliary
switching elements

Reset

LED lights up

LED flashes

LED flickers

LED dark

Unless current is detected in all three phases, the device behaves as listed in the

"Without main circuit current“ column.

Status of auxiliary switching elements "Reset":
95/96, 05/06 open, 97/98, 07/08 closed.

Summary of Contents for 3RB12

Page 1: ...erload relay Relais de surcharge electronique Relé electronico di sobrecarga Relè elettronico di sovraccarica Elektroniska överlastrelä Betriebsanleitung Instructions Bestell Nr Order No 3ZX1012 0RB12 1AA1 Ausgabe Edition 01 2003 GWA 4NEB 631 2282 30a ...

Page 2: ...3RB1246 1P 3RB1246 1Q 3RB1246 1E a 10 15 b 34 29 c 29 24 d 46 47 e 48 f 4 100 70 50 4 5 7 2 Ic 85 127 5 5 100 Ib Ia b e a f c d x y 3ZX1012 0RB12 1AA1 ...

Page 3: ...L a 120 145 230 b 85 85 85 c 155 175 190 d 110 105 120 e 40 50 70 f 7 9 11 g 42 52 70 h 37 48 i 125 130 135 j 41 46 55 k 20 30 40 l 131 151 166 m 7 2 7 2 7 2 n 13 o 145 160 175 i d b a g e h k m f o IIb IIa l j n c 3ZX1012 0RB12 1AA1 ...

Page 4: ...III M 1 NSB00302a L1 L2 L3 T1 T2 T3 L N 3RB12 3ZX1012 0RB12 1AA1 ...

Page 5: ... CLASS 97 S1A 95 98 96 K1E S1E Test Reset K1 Overload K2 Ground Fault Y1 Y2 Z1 Z2 5 10 15 20 25 30 Ground Fault H 1 H3 05 07 06 08 Ready Ground Fault Overload C2 T2 C1 Y1 Y2 Automatic Reset Remote Reset ϑ Y1 Y2 T1 ϑ T2 C1 3UL22 3 RB 12 K1E L1 L2 L3 N M 3 IV 3RB12 3ZX1012 0RB12 1AA1 ...

Page 6: ... 70 80 90 100 5 10 15 20 25 30 Class Test Reset G 9401 3RB1246 1EM00 95 96 97 98 08 07 06 05 A1 Y1 Y2 A2 T1 T2 C1 C2 Overload Gnd Fault Ready Reset Gnd Fault AC 220 240V J 3RB12 NC Overload NO NC Gnd Fault NO A A B 3ZX1012 0RB12 1AA1 ...

Page 7: ...15 20 25 30 Class Test Reset G 9401 3RB1246 1EM00 95 96 97 98 08 07 06 05 A1 Y1 Y2 A2 T1 T2 C1 C2 Overload Gnd Fault Ready Reset Gnd Fault AC 220 240V ϑ 3RB12 NC NO NC NO A A B Tripped OVL Warning 3RB12 1 3RB12 3 VI 3ZX1012 0RB12 1AA1 ...

Page 8: ... x I e t A 1 2 5 10 20 50 1 2 5 8 0 7 1 2 5 10 20 50 100 120 s min 15 10 5 CLASS CLASS 30 25 20 x I e 1 2 5 10 20 50 1 2 5 8 0 7 1 2 5 10 20 50 100 120 s min 15 10 5 CLASS t A CLASS 30 25 20 3ZX1012 0RB12 1AA1 ...

Page 9: ...on mechanisms Overload protection The 3RB12 compares the motor current actually flowing with the set current and evaluates the values in a microprocessor Thermistor protection PTC thermistors in the motor windings sense the motor temperature If the thermistor responds the relay trips Earth fault protection Versions with internal earth fault detection are suitable for service in three wire systems ...

Page 10: ... for snap on fastening on 75 mm mount ing rail 3UF1900 0J available as accessory 3 Connection 3 1 Main conductor connection 3 1 1 Current range up to 100 A Rated motor currents from 1 25 A to 100 A Insert the motor leads per phase through the open ings x in the unit see graphics section Fig Ia Rated motor currents less than 1 25 A Insert the motor leads per phase through the open ings x take them ...

Page 11: ...rs are to be protected by the 3RB12 solid state overload relay phase L must be looped through the device The main circuits must be connected as shown in Fig III Note This is only possible if the device has no internal earth fault detection 3RB12 46 0 1 3RB12 53 0 1 3RB12 57 0 1 3RB12 62 0 1 Number of loops n 5 4 3 2 Rated motor current IN A 0 25 to 0 3 0 31 to 0 41 0 42 to 0 62 0 63 to 1 24 ...

Page 12: ...nsformer 3UL22 for external earth fault monitoring Finely stranded conductor with cable lug mm2 Stranded con ductor with cable lug mm2 Connection screws Tightening torque Nm lb in Tag termination mm x mm 3RB1253 35 to 95 50 to 120 M8 10 to 14 89 to 24 20 x 4 3RB1257 50 to 240 70 to 240 M10 14 to 24 124 to 210 30 x 6 3RB1262 50 to 240 185 to 240 M 10 Connec tion to con tactor 3TF68 14 to 24 124 to ...

Page 13: ...y Use the class changeover switch to select the appro priate tripping characteristic see graphic section of Fig VII In the event of unsymmetry 40 as per NEMA and phase failure tripping occurs as shown in Fig VIII The characteristics apply to a cold start For starting under full load the tripping times tA are reduced Note With the aid of the sealable cover plate 3RB1900 0A the current range setting...

Page 14: ...larm Overload LED Red flashing light 05 06 open 07 08 closed Overload trip thermistor trip Overload LED Red steady light 95 96 open 97 98 closed Earth fault alarm Gnd Fault LED Red steady light 05 06 open 07 08 closed 95 96 open 97 98 closed The overload LED flashes when the limit tripping current is reached and indicates that tripping is imminent Status Mode indicator Auxiliary switch Device not ...

Page 15: ...nchanged Press for after 2 s LED Ready LED Gen Fault LED Overload Status of auxiliary switching elements un changed Reset un changed Reset Press for 5 s LED Ready LED Gen Fault LED Overload Status of auxiliary switching elements Reset LED lights up LED flashes LED flickers LED dark Unless current is detected in all three phases the device behaves as listed in the Without main circuit current colum...

Page 16: ...RB12 has tripped because of Reset the overload relay after the following times by briefly pressing the test reset button Remote reset briefly press but ton at Y1 Y2 automatic reset bridge Y1 Y2 Test immediately Overload after 5 min Thermistor If the temperature has reached 5 K below the response temperature Earth fault immediately not effective If thermistor and overload has tripped simultaneously...

Page 17: ... kg Rated control supply voltage Working range AC 0 85 to 1 1 x Us 2 VA 24 V DC 0 85 to 1 2 x Us DIN 19 240 2W Main circuit Frequency 50 60 Hz Rated insulation voltage Ui 1000 V 3RB1246 690 V Permissible ambient temperature 25 to 70 C Storage 40 to 80 C Tripping limit values with three pole symmetrical overload Tripping current 110 120 x Ie Tripping time 20 min Auxiliary circuit Contacts 2 x 1 NO ...

Page 18: ...loading 5 mW at Rcold 1 5 kΩ Voltage at sensor circuit 2 V at Rcold 1 5 kΩ Response value 2 7 to 3 1 kΩ Return value 1 5 to 1 65 kΩ Earth fault protection The following information based on sinusoidal fault currents of 50 60 Hz external Summation current transformers 3UL220 A are con nected to terminal C1 C2 The pick up delay is 200 ms t 500 ms internal With a motor current between 0 3 and 2 times...

Page 19: ...teurs Protection contre les surcharges Le 3RB12 compare le courant momentané du moteur avec le courant de réglage du relais et traite les valeurs dans un microprocesseur Protection de moteurs par thermistance Les sondes à thermistance CTP placées dans les en roulements du moteur assurent la mesure de la tempé rature de ce dernier Lors du dépassement d un seuil le relais provoque le déclenchement P...

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