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ABB PMA Instruction Leaflet
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ABB PMA Instruction Leaflet

ABB PMA Instruction Leaflet

For pilot-wire monitoring and transferred tripping
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Summary of Contents for ABB PMA

  • Page 2 1 Blocking Rectifier Fixed Resistors 2-4 mfd Capacitors 1 Indicating Contactor (dc Relay) PM-5 Switch (ICS) 1 Polar Ground Unit (5) 2-4 mfd Capacitors 1 Fixed Resistor Table 1: PMA-1 & & Function PMD-1 PM-13 PMG-13 PM-23 PM-2 PM-3 PM-4...

  • Page 3: Operation

    I.L. 41-973.5Q Shunt Permanent Magnet Additional Flux Path Armature Moving Contact BALANCED AIR GAPS UNBALANCED AIR GAPS Sub 5 183A062 Figure 1. Polar Unit Permanent Magnet Flux Paths. 2.1. Polar Unit The front spring, in addition to holding the target, pro- vides restraint for the armature and thus controls the The polar unit consists of a rectangular shaped mag- pickup value of the switch.
  • Page 4 3.5. Grounds PM-4 relay at the other end of the pilot-wire provides The voltage-divider circuit of the PMA, PMD, and a normal one-milliampere dc circulating current. In PMG-13 source relays has its midpoint grounded the case of three-terminal lines, the monitoring through a current-limiting resistor.
  • Page 5 Operating units of all relays are adjusted in the fac- tory to the values listed in Tables 5 and 5 to a toler- 4.5. PMA, PMA-1 and ac PMG-13, PM-13 Burden ance of ±8%. No settings are required on these units. 0.5 VA at tap voltage...
  • Page 6 I.L. 41-973.5Q Table 2: PMA, PMA-1, PMD, AND PMD-1 APPLICATIONS EXTERNAL RESISTORS FOR DC REMOTE TRIPPING (2 REQUIRED PER STATION) # Line Station A Station A Station B Station C PM-2 & PM-3or PM-2 & PM-3 or Terminals Voltage PMA or PMA-1...

  • Page 7: Installation

    flange for semi-flush mounting or by means of 5.2. PMA, PMA-1, PMG-13 and PM-13 Relays the rear mounting stud or studs for projection mount- ing. Either a mounting stud or the mounting screws Select the transformer tap nearest to expected nor- may be utilized for grounding the relay.

  • Page 8: Adjustments And Maintenance

    At this value, the moving contact of the alarm or mon- itoring relay unit (1) should float between the two sets of stationary contacts. In the PMA relay, the ground For detailed FT case information, refer to I.L. 41-076. alarm unit (5) contact should also float. (This contact will also float when the relay is deenergized.)
  • Page 9 I.L. 41-973.5Q Reduce the current gradually. The monitoring alarm the primary tap on 120 volts. Now apply the rated contacts should close at 0.65 mA dc. The tripping supply voltage to terminals 4 and 5. This will be 48, unit (3) of the PM-23 relay should not move during 125, or 250 volts dc, or 120 volts ac as indicated on this test.

  • Page 10: Routine Maintenance

    I.L. 41-973.5Q ROUTINE MAINTENANCE resistance. If voltage is zero, the diode is open-cir- cuited. CAUTION CALIBRATION If the relay has been dismantled or the calibration DO NOT make any performance check, calibra- has been disturbed, use the following procedure for tion tests, or adjustments while the PM relays are calibration.
  • Page 11 For all monitoring alarm units, designed (1) or (2), turn in all the stationary contact and contact stop For the pilot-wire ground alarm unit (5) of the PMA, screws until they just touch the moving contact. PMD, PM-5, and PMG-13 relays, follow the same...
  • Page 12 Connect the relay as described under the “Accep- POS. NEG. tance Tests” section, for the particular relay involved. PMA, PMA-1 Screw the two magnetic shunts all the way in, then PMD, PMD-1 back them out five turns each. With the relay ener-...

  • Page 13: Renewal Parts

    The bridging moving contact should 0.3 mA dc in each direction. touch both stationary contacts simultaneously. For the ground unit (5) of the PMA, PMD, and PMG- 10. RENEWAL PARTS 13 relays, connect a variable resistance of about...
  • Page 14 PMA Relay - ac supply - two terminal line- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15...
  • Page 15 Courtesy of NationalSwitchgear.com...
  • Page 16 Courtesy of NationalSwitchgear.com...
  • Page 17 y of NationalSwitchgear.com...
  • Page 18 Courtesy of NationalSwitchgear.com...
  • Page 19 Courtesy of NationalSwitchgear.com...
  • Page 20 Courtesy of NationalSwitchgear.com...
  • Page 21 y of NationalSwitchgear.com...
  • Page 22 Courtesy of NationalSwitchgear.com...
  • Page 23 sy of NationalSwitchgear.com...
  • Page 24 Courtesy of NationalSwitchgear.com...
  • Page 25 tesy of NationalSwitchgear.com...
  • Page 26 I.L. 41-973.5Q *Sub 20 57D7900 Figure 36. Outline and Drilling Plan for the Type PM-3, PM-5, & PMD-1 Relays in the Type FT-11 case. Courtesy of NationalSwitchgear.com...
  • Page 27 I.L. 41-973.5Q *Sub 17 57D7901 Figure 37. Outline and Drilling Plan for the Type PM-2, PM-23, PMA-1 and PMD Relays in the Type FT-21 case Courtesy of NationalSwitchgear.com...
  • Page 28 I.L. 41-973.5Q *Sub 17 57D7902 Figure 38. Outline and Drilling Plan for the Type PMA Relay in the Type FT-31 case. Courtesy of NationalSwitchgear.com...
  • Page 29 I.L. 41-973.5Q *Sub 17 57D7903 Figure 39. Outline and Drilling Plan for the Type PM-13 and PMG-13 Relays in the Type FT-32 case. Courtesy of NationalSwitchgear.com...

This manual is also suitable for:

Pma-1PmdPmd-1Pmg-13Pm-13Pm-23 ... Show all