ABB PMA User Manual (English)

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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

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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