ABB PMA - Table 1:

41-973.5R
2
Type PM Line of Relays For Pilot Wire Monitoring
And Transferred Tripping
PMG-13 PM-13
1 Polar Alarm Unit (1)
1 Polar Ground Unit (5)
1 Polar Trip Unit (3)
1 Indicating Contactor
Switch
1 Set of Potential Divider
Resistors
1 Tapped Transformer
(ac Relay Only)
1 Blocking Rectifier
2 Remote Trip Resistors
3-4 mfd Capacitors
(ac Relay)
2-4 mfd Capacitors
(dc Relay)
1 Polar Alarm Unit (1)
1 Polar Trip Unit (3)
1 Indicating Contactor
Switch
1 Set of Potential Divider
Resistors
1 Tapped Transformer
(ac Relay only)
1 Full-Wave Rectifier
(ac Relay only)
1 Blocking Rectifier
2 Remote Trip Resistors
1-4 mfd Capacitor
PM-23 PM-2
1 Polar Alarm Unit (2)
1 Polar Trip Unit (3)
1 Indicating Contactor
Switch (ICS)
1 Milliammeter, 5.0 mA
1 Set of Adjustable and
Fixed Resistors
2 Blocking Rectifiers
1 Polar Alarm Unit (2)
1 Milliammeter, 5.0 mA
1 Set of Adjustable
Resistors
1 Blocking Rectifier
PM-3 PM-4
1 Polar Trip Unit (3)
1 Resistor
1 Blocking Rectifier
1 Indicating Contactor
Switch (ICS)
1 Blocking Rectifier
1 Set of Adjustable and
Fixed Resistors
PM-5
1 Polar Ground Unit (5)
2-4 mfd Capacitors
1 Fixed Resistor
†
With external Resistors
Table 1:
Function
PMA
&
PMD
PMA-1
&
PMD-1 PM-13 PMG-13 PM-23 PM-2 PM-3 PM-4 PM-5
Monitoring
Current
Source
XXX X
Receives
Monitoring
Current
XX X
Trouble
Alarm
XXX X XX X
Transmits
Trip Signal
X
†
X
†
XX
X
†
X
†
X
†
X
†
Receives
Trip Signal
XXX X
Sensitive
Ground
Detection
XX X
Measures
Monitoring
Current
XX