GE DBT, Instruction Manual

Page 1: ...ail gemultilin ge com Internet www gemultilin com Copyright 2004 GE Multilin DBT Digital Trip Coil Supervision Relay Instruction Manual GEK 105597C GE Multilin Avda Pinoa 10 48170 Zamudio SPAIN Tel 34 94 485 88 00 Fax 34 94 485 88 45 E mail gemultilin euro ge com g GE Consumer Industrial Multilin ...

Page 2: ...ATING PRINCIPLES 9 5 TECHNICAL CHARACTERISTICS 11 5 1 TECHNICAL CHARACTERISTICS 11 5 3 TYPE TESTS 12 6 RELAY SETTINGS 15 6 1 READY LED 15 6 2 ENABLE SWITCH 16 6 3 RESET TARGET SWITCH 16 6 4 LED INDICATORS 16 6 5 COIL RESISTANCE SETTING 17 6 6 VOLTAGE SETTING 17 6 7 TIME DELAY SETTING ADJUSTMENT 17 6 8 SUMMARY TABLE OF SETTINGS 18 7 RECEPTION TESTS 19 7 1 VISUAL INSPECTION 19 7 2 INSULATION 19 7 3 ...

Page 3: ...B1298H3 Figure 2 External connections one coil model 226B6291H5 Figure 3 External connections three coils model 226B6291H4 Figure 4 External connections model DBT3000A 0H02 226B6291H6 Figure 5 Mechanical dimensions and cut out 226B6086H11 Figure 6 Rear terminal plate 226B6292H1 Figure 7 Block diagram 226B2209H1 ...

Page 4: ... limited to a maximum of 24 V By measuring the voltage drop in the coil the DBT calculates the resistance Figure 3 shows a typical three coil DBT connection to a coil In this way the relay can measure the coil resistance at any time in reality the association of the breaker coil with any other auxiliary coils either by the 52 a type contact if the breaker is closed or the 52 b type if it is open T...

Page 5: ...DESCRIPTION 4 DBT Digital Trip Coil Supervision Relay GEK 105597C ...

Page 6: ...e coils without going through contacts 52 a and 52 b in this case monitoring of these would be lost it can be done The connection of the coil at the input of 52 a has to be wired and leave input 52 b unconnected 2 2 USE AS A DC UNDERVOLTAGE RELAY If you only want to use the undervoltage unit this can be done by simply disabling the coil monitoring units This inhibition is done by connecting inputs...

Page 7: ...ractical way of adjusting the DBT is to vary the resistance setting starting from the minimum value 50 Ω until the relay disables its resistance monitoring output It is advisable to increase this setting to approximately 20 to reduce the impact of temperature and ground impedance If the setting cannot be made in this manner apply the maximum setting 200 Ω to avoid unwanted operation Voltage The re...

Page 8: ...0 DESCRIPTION Number of coils 1 1 coil single phase 3 3 coils three phase Coil resistance 0 75 300 Ohm 1 150 600 Ohm Breaker Voltage 1 110 125 V DC 2 220 250 V DC Output relays option for DBT1 models 0 See Figure 2 at the end of the manual Output relays option for DBT3 models 0 See Figure 3 at the end of the manual 1 See Figure 3 at the end of the manual 2 See Figure 4 at the end of the manual ...

Page 9: ...MODEL LIST 8 DBT Digital Trip Coil Supervision Relay GEK 105597C ...

Page 10: ...are located after the undervoltage unit both monitoring the first coil The resistance measurement is calculated through the voltage drop produced by the current injected by the current sources Supposing that the breaker is closed auxiliary contact 52 a would also be closed whereas 52 b would be open The measuring unit connected to 52 b would show a higher voltage than that of the resistance settin...

Page 11: ... 3 External Connections the DBT has a SYSTEM READY output relay This closes the contact in case the relay is not available due to one of the following causes An internal fault An auxiliary voltage drop of the supply The relay has been disabled The DBT can be disabled either externally by enabling one or several of any of the 4 digital inputs for inhibition in the case of the 3 phase or by the sing...

Page 12: ... 250 V DC 20 TEMPERATURE RANGES Operational range 25ºC to 55ºC Storage range 40ºC to 70ºC Complies with IEC 255 6 and ANSI C37 90 Standards HUMIDITY Up to 95 without condensation OUTPUT CONTACTS Breaking capacity 4000 VA Maximum DC voltage 300 V DC Maximum AC voltage 440 V AC Continuously 16 A Making capacity 30 A ACCURACY Voltage 5 Resistance 10 Time 20 ms VOLTAGE CIRCUIT BURDEN 110 125 V DC mode...

Page 13: ...y Between independent circuits 2000 V AC for 1 minute at industrial frequency 5 3 TYPE TESTS 1 MHz interference test 2 5 kV common mode 1 kV differential class III as per IEC 255 4 Impulse test 5 kV peak 1 2 50 µs 0 5 J as per IEC 255 4 Radiointerference As per IEC 1000 1 2 IEC 255 22 2 class IV Electrostatic discharge As per IEC 1000 1 3 IEC 255 22 3 class III Fast transient As per IEC 1000 1 4 I...

Page 14: ...h these Standards which includes the GE Standard on the level of insulation and electromagnetic compatibility required by CE Directive 89 336 for CE marking according to standardised European regulations It also complies with the European Low Voltage Directive and the environmental and operational requirements laid down in Standards ANSI C37 90 IEC 255 5 IEC 255 6 and IEC 68 ...

Page 15: ...TECHNICAL CHARACTERISTICS 14 DBT Digital Trip Coil Supervision Relay GEK 105597C ...

Page 16: ...ault occurs LEDs are also located on the relay and serve as indicators to give information on the relay and the circuits being monitored The next section describes the LEDs and their settings seen from left to right If a relay is not available use Figure 1 Characteristics nameplate for reference 6 1 READY LED A two colour LED which can be in any one of the following three situations Off indicates ...

Page 17: ...ET SWITCH This switch has two uses Acknowledgement of indicators A fault is recorded by an LED with memory This is erased by pressing and releasing the RESET button If the auxiliary voltage drops the registered LED operation will be erased too Checking indicators This feautre is used to ensure indicators are working properly When the RESET button is pressed all the indicators which are out will li...

Page 18: ...the resistance setting it is a block of 4 dip switches For the 110 125 V DC model the minimum value is 50 V the maximum 125 V and the step 5 V For the 220 250 V DC model the values are double the above so the minimum is 100 V the maximum 250 V and the step 10 V If a setting of 115 V is required 110 125 model raise dip switches 1 3 and 4 making a total of 50 5 20 40 115 This is equivalent to 230 V ...

Page 19: ...8 SUMMARY TABLE OF SETTINGS Name of setting Max Min Step Set to Enable Enabled Disabled ____ ____ Enabled Disabled Resistance 300 Ω 75 Ω 15 Ω _____ Ω Voltage 110 250 model 220 250 model 125 V 250 V 50 V 100V 5 V 10 V _______ V _______ V Time delay 20 s 0 2 s 0 1 s _______ s ...

Page 20: ...uld always be earthed by an earthing cable connected to terminal B 12 Do not forget to make the shortest possible connection to terminals B 11 and B12 so that the capacitors can perform their filtering operation correctly Important to avoid serious damage to the relay make sure that all the terminals from the same group are connected to each other while test voltage is being applied to that group ...

Page 21: ...ervoltage LED flashes pick up with the pick up voltage see table below The LED remains flashing until the undervoltage condition disappears drop out voltage When the drop out voltage is reached and the set time ellapses the LED stop flashing and is lit permanently fault memory function It is recommended to set the time to the minimum in order to ease the test 110 125 model 220 250 model VOLTAGE se...

Page 22: ...sh button is pressed the B2 B3 will be opened leading to a start of failure Create a fault as described above and check that the results in the table are complied with TIMER DELAY setting Minimum time Maximum time 200 ms 200 ms 240 ms 300 ms 300 ms 340 ms 400 ms 400 ms 440 ms 600 ms 600 ms 640 ms 1 s 1 s 1 04 s 1 8 s 1 8 s 1 84 s 3 4 s 3 4 s 3 44 s 6 6 s 6 6 s 6 64 s 13 s 13 s 13 04 s Maximum 19 9...

Page 23: ...mum 135 122 149 values 195 175 215 300 270 330 The test is done in the sequence described for each of the settings indicated Repeat this test for the units Corresponding to coils 2 and 3 7 6 ENABLE TEST Disable the relay by putting the ENABLE switch in the left hand position Check that there is no disabling through the digital inputs disconnect or deenergize these inputs The alarm contact will clo...

Page 24: ...FIGURES GEK 105597C DBT Digital Trip Coil Supervision Relay 23 FIGURE 1 NAMEPLATE 226B1298H3 ...

Page 25: ...IRCUITO INTERRUPTOR CORRECTO TENSION MANDO PUEDEN SER POSITIVOS SEPARADOS SYSTEM READY BREAKER CIRCUIT O K INHIBICION B3 B4 52a 52b TENSION MANDO BREAKER VOLTAGE BREAKER CIRCUIT O K C CLOSED CERRADO O OPEN ABIERTO CONTACT LOGIC LOGICA CONTACTOS O C C O C O CAN BE CONNECTED TO ISOLATED CIRCUITS PROTECTIVE EARTH TIERRA DE PROTECCION Only disconnect in Hipot testing Desconectar solo en prueba de aisl...

Page 26: ...FIGURES GEK 105597C DBT Digital Trip Coil Supervision Relay 25 FIGURE 3 EXTERNAL CONNECTIONS THREE COILS 226B6291H4 ...

Page 27: ...FIGURES 26 DBT Digital Trip Coil Supervision Relay GEK 105597C FIGURE 4 EXTERNAL CONNECTIONS MODEL DBT3000A 0H02 226B6291H6 ...

Page 28: ...FIGURES GEK 105597C DBT Digital Trip Coil Supervision Relay 27 FIGURE 5 MECHANICAL DIMENSIONS AND CUT OUT 226B6086H11 ...

Page 29: ...FIGURES 28 DBT Digital Trip Coil Supervision Relay GEK 105597C FIGURE 6 REAR TERMINAL PLATE 226B6292H1 ...

Page 30: ...FIGURES GEK 105597C DBT Digital Trip Coil Supervision Relay 29 FIGURE 7 BLOCK DIAGRAM ...