ABB MG-6 Instruction Leaflet

Multi-contact auxiliary relay
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Type MG-6
Multi-Contact Auxiliary Relay
Instruction Leaflet: 41-753.1 N
Effective: August 2008
Supersedes 41-753.1 M, Dated December 1999
( | ) Denotes Change Since Previous Issue
Device Number: 94X, Y, Z


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Summary of Contents for ABB MG-6

  • Page 1 Type MG-6 Multi-Contact Auxiliary Relay Instruction Leaflet: 41-753.1 N Effective: August 2008 Supersedes 41-753.1 M, Dated December 1999 ( | ) Denotes Change Since Previous Issue Device Number: 94X, Y, Z ...
  • Page 2: Maintenance

    All bases and covers are made of a molded thermo-plastic material, which provides a tough, insulated enclosure for the relay. MG-6 are Before putting relays into service, remove all available as follows: blocking materials which may have been inserted •...
  • Page 3 Figure 1 - Front and Side Views of MG-6 Relay with Electric & Hand Reset (Cover Removed). 1 = Reset push rod 6 = Adjusting screw for armature spring tension...
  • Page 4 MG-6 Multi-Contact Auxiliary Relay 2.2.1 special Contacts (make-before-break) table 1 In certain applications of the MG-6 relay, it may Designated position of special Contacts desirable to have one or more of the contacts close before other contacts on the same relay open (make-before-break).
  • Page 5 In dc = approximately 0.083 seconds some applications of the MG-6 relay having the latch and electrical reset, it may be desirable to have the If faster operation is desired and if the application...
  • Page 6: Relay Settings

    IL 41-753.1 N MG-6 Multi-Contact Auxiliary Relay RAtINGs Operating Data for Continuously Rated Auxiliary Relays ANSI C37.90 standards Meets or exceeds all the IEC 255 Operating Coil Reset Coil following, as applicable UL STD-508 Must dc, 50 Hz, or 60 Hz...
  • Page 7: Installation

    IL 41-753.1 N 5.0 INstALLAtION 6.2.2 Armature spring preliminary Adjustments MG-6 relays should be mounted on switchboard When adjusting the armature spring tension, the panels or their equivalent in locations free from dirt, locking screw for the spring adjusting screw is dust, moisture, excessive vibration and heat.
  • Page 8 IL 41-753.1 N MG-6 Multi-Contact Auxiliary Relay contacts are approximately three times as strong as insure proper operation, allowance must be made for the ones compressed by circuit-opening contacts and this in the following manner. With the armature held thus they can be readily distinguished. The positions...
  • Page 9: Renewal Parts

    8.0 ReNeWAL pARts spring adjustments example specified above is for a 60 Hz MG-6 relay with a voltage rating equal to line Repair work can be done most satisfactorily at the voltage and can be used with a series resistor that factory.
  • Page 10 IL 41-753.1 N MG-6 Multi-Contact Auxiliary Relay Ordering Information - MG-6 Relay...
  • Page 11 MG-6 Multi-Contact Auxiliary Relay IL 41-753.1 N table 2 - Operate & Reset Coil Codes Coil Coil Coil Rating Rating Rating Code Code Code 32 Volts dc 208 Volts 50 Hz NONE 36 Volts dc 208 Volts 60 Hz AC Coils...
  • Page 12 MG-6 Multi-Contact Auxiliary Relay Rev. 10 Rev. 8 4D1072 4D1076 Figure 3 - Internal Schematic for the Type MG-6 Figure 4 - Internal Schematic for the Type MG-6 Relay, Self Reset, in Molded Case Relay, Electric Reset, in Molded Case Rev. 2 Rev.
  • Page 13 IL 41-753.1 N Rev. 9 183A817 Figure 7 - Outline and Drilling Plan for MG-6 Class 1E Relay in Molded Semi-Flush Mount Case Rev. 7 184A370 Figure 8 - Outline and Drilling Plan for MG-6 Class 1E Relay in Molded Projection Mount Case...
  • Page 14 IL 41-753.1 N MG-6 Multi-Contact Auxiliary Relay Rev. 10 4D1122 Figure 9 - Outline and Drilling Plan for MG-6 Class 1E Relay in Molded Case, Surface Mount, Front Connected without Cover Rev. 2 9656A20 Sub 4 3519A68 Figure 10 - Outline and Drilling Plan for MG-6 Class 1E Relay in Molded Case, Surface Mount, Front...
  • Page 15 MG-6 Multi-Contact Auxiliary Relay IL 41-753.1 N Rev. 14 183A158 Figure 11 - Outline and Drilling Plan for MG-6 Class 1E Relay in Flexitest FT-22 Case...
  • Page 16 ABB Inc. 4300 Coral Ridge Drive Coral Springs, Florida 33065 Telephone: +1 954-752-6700 Fax: +1 954-345-5329 www.abb.com/substation automation...

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