S3 Output Relays; Description; Alarm Relay; Auxiliary Relays - GE PQMII Instruction Manual

5.4

S3 Output Relays

5.4.1

Description

5.4.2

Alarm Relay

ALARM RELAY
5.4.3

Auxiliary Relays

AUXILIARY
RELAY 1
5–32
Output relay operation in the PQMII occurs in either 'failsafe' or 'non-failsafe' modes, as
defined below:
• Non-failsafe: The relay coil is not energized in its non-active state. Loss of control
power will cause the relay to remain in the non-active state. That is, a non-failsafe
alarm relay will not cause an alarm on loss of control power. Contact configuration in
the Wiring Diagrams is shown with relays programmed non-failsafe and control
power not applied.
• Failsafe: The relay coil is energized in its non-active state. Loss of control power will
cause the relay to go into its active state. That is, a failsafe alarm relay will cause an
alarm on loss of control power. Contact configuration is opposite to that shown in the
Wiring Diagrams for relays programmed as failsafe when control power is applied.
PATH: SETPOINTS S3 OUTPUT RELAYS
[ ] ALARM OPERATION:
NON-FAILSAFE
ALARM ACTIVATION:
MESSAGE
UNLATCHED
• ALARM OPERATION: The terms 'failsafe' and 'non-failsafe' are defined above as
implemented in the PQMII. If an alarm is required when the PQMII is not operational
due to a loss of control power, select failsafe operation. Otherwise, choose non-
failsafe.
• ALARM ACTIVATION: If an alarm indication is required only while an alarm is present,
select unlatched. Once the alarm condition disappears, the alarm and associated
message automatically clear. To ensure all alarms are acknowledged, select latched.
Even if an alarm condition is no longer present, the alarm relay and message can only
be cleared by pressing the key or by sending the reset command via the computer.
PATH: SETPOINTS S3 OUTPUT RELAYS
[ ] AUX1 OPERATION:
NON-FAILSAFE
AUX1 ACTIVATION:
MESSAGE
UNLATCHED
The PQMII contains three (3) auxiliary relays, denoted as Aux1 through Aux3. The terms
'failsafe' and 'non-failsafe' are defined in the previous section.
CHAPTER 5: SETPOINTS
ALARM RELAY
Range: Non-failsafe, Failsafe
Range: Unlatched, Latched
AUXILIARY RELAY 1(3)
Range: Non-failsafe, Failsafe
Range: Unlatched, Latched
PQMII POWER QUALITY METER – INSTRUCTION MANUAL