ABB PMA - User Manual

ABB Automation Inc.
Substation Automation and Protection Division
Coral Springs, FL 33065
Instruction Leaflet
All possible contingencies which may arise during installation, operation or maintenance, and all details and
variations of this equipment do not purport to be covered by these instructions. If further information is desired
by purchaser regarding this particular installation, operation or maintenance of this equipment, the local ABB
Power T&D Company Inc. representative should be contacted.
Printed in U.S.A.
41-973.5R
Type PM Line of Relays
For Pilot-Wire Monitoring
and Transferred Tripping
Effective: November 1999
Supersedes I.L. 41-973.5Q Dated February 1996
( ) Denotes change since previous issue
!
CAUTION
Before putting protective relays into service,
remove all blocking which may have been
inserted for the purpose of securing parts during
shipment, make sure that all moving parts oper-
ate freely, inspect the contacts to see that they
are clean and close properly, and operate the
relay to check the settings and electrical connec-
tions.
1.0 APPLICATION
Type PM Monitoring Relays provide continuous moni-
toring of a pilot-wire circuit to detect open circuits,
short circuits, grounds, and wire reversal. In addition,
transferred tripping can be effected where the PM-3,
PM-13, PMG-13 or PM-23 relays are used. Table 1
illustrates the functions available with each relay. A
10 mfd. Capacitor is supplied with each PM relay.
This capacitor provides an ac path between the two
halves of the insulating transformer secondary wind-
ings as shown in figures 25 through 31.
Any relay which has a ground detection unit (5 unit),
may have a momentary contact closure when a
ground occurs on the station battery. If the momen-
tary contact closure causes a problem, relays are
available with an auxiliary telephone relay which has
a pickup delay to eliminate this problem
Each circuit requires the following:
2.0 CONSTRUCTION
PM relays consist of the following:
At one end to introduce monitoring current
One of the following:
For ac supply For dc Supply
PMA PMD
PMA-1 PMD-1
PM-13 or PMG-13 (ac) PM-13 or PMG-13 (dc)
At the other end to receive monitoring current (two termi-
nal line):
One PM-23 or PM-2 or PM-4
At the other ends to receive monitoring current (three
terminal line):
One PM-23 or one PM-4 or one PM-2 for each remote
terminal.
PMA PMA-1
1 Polar Alarm Unit (1)
1 Polar Ground Unit (5)
1 Tapped Transformer
1 Full-Wave Rectifier
3-4 mfd Capacitors
1 set of Potential Divider
Resistors
1 Polar Alarm Unit
1 Tapped Transformer
1 Full-Wave Rectifier
1-4 mfd Capacitor
1 Set of Potential Divider
Resistors
PMD PMD-1
1 Polar Alarm Unit (1)
1 Polar Ground Unit (5)
2-4 mfd Capacitors
1 Set of Potential Divider
Resistors
1 Polar Alarm Unit
1 Set of Potential Divider
Resistors

Summary

1.0 APPLICATION

3.0 OPERATION

3.1 PILOT WIRE MONITORING

Explains how monitoring current is introduced and circulates in pilot-wire circuits.

3.2 SHORT CIRCUITS

3.3 OPEN CIRCUITS

3.4 REVERSE WIRES

3.5 GROUNDS

3.6 TRANSFERRED TRIPPING

Describes how to trip breakers remotely using dc voltage on pilot wires.

4.0 CHARACTERISTICS

4.7 REMOTE TRIPPING

Provides information on remote trip resistors and currents.

5.0 SETTINGS

5.1 PM-4, PM-2, AND PM-23 RELAYS

6.0 INSTALLATION

7.0 ADJUSTMENTS AND MAINTENANCE

7.1 ACCEPTANCE TESTS

7.1.1 Indicating Contactor Switch (ICS)

Procedure for testing the ICS unit's operation and target drop.

7.1.2 PMA and PMA-1 Relays

7.1.3 PMD and PMD-1 Relays

7.1.4 PM-2, PM-3, and PM-23 Relays

7.1.6 PM-5 Relay

7.1.7 PM-13 Relays - ac and dc

7.1.8 PMG-13 Relays - ac and dc

8.0 ROUTINE MAINTENANCE

8.2 OPERATIONAL CHECK

8.3 RECTIFIER (DIODE) CHECK

9.0 CALIBRATION

9.1 POLAR UNITS - GENERAL

9.1.1 Magnetic Shunt Adjustment

How to adjust magnetic shunts for polar unit sensitivity.

9.1.2 Contact Adjustment - all relays

Adjusting stationary contacts and stop screws for proper travel.

9.1.3 Contact Gap

9.1.4 Electrical Calibration - all relays

General note on calibration instructions by polar unit function.

9.1.5 Alarm Unit (1)

Detailed calibration procedure for Alarm Unit (1).

9.1.6 Polarization Check

9.1.7 Alarm Unit (2)

Calibration procedure for Alarm Unit (2) of PM-2 or PM-23 relays.

9.1.8 Tripping Unit (3)

Calibration procedure for tripping units of PM-3, PM-13, PMG-13, PM-23.

9.1.9 Ground Alarm Unit (5)

Calibration procedure for PM-5 and other ground alarm units.

9.1.10 ICS Unit

ABB PMA Specifications

General

Frequency Range	50/60 Hz
Storage Temperature	-40°C to +85°C
Type	Protection Relay
Current Rating	5 A
Protection Functions	Overcurrent, Earth Fault, Overvoltage, Undervoltage, Frequency
Communication	Modbus RTU
Humidity	Up to 95% (non-condensing)
Enclosure Rating	IP20