Alarm Conditions - GE Hydran M2-X Instruction Manual

Hydran* M2-X Instruction Manual
The gas and moisture alarms provide an early warning of incipient faults in
transformers or any other oil-filled electrical equipment.
6.1.3

Alarm Conditions

An alarm is triggered when an alarm condition is detected. Each of the four alarm
types has its own set of alarm conditions. Table 6-1 lists the alarm conditions
monitored by the Hydran M2-X.
Source
Gas level
Gas hourly trend
Gas daily trend
Moisture level
Moisture average
Relative humidity
Relative humidity
average
Analog input
a
Sensor temperature
Base plate
temperature
a
Battery voltage
Sensor and
connections
a. The sensor temperature, the base plate temperature and each analog input could generate four alarm
conditions.
b. Either one of the following cables (or connectors in the connection link): sensor, sensor thermistor or
heater plate thermistor.
MA-029 Rev. 1.0, 30-Jul-18
—
—
—
—
—
—
—
Low-Low
Low-Low
a
Low-Low
Low-Low
b
Cable short
Table 6-1: Alarm Conditions Monitored by the Hydran M2-X
Possible States
—
— High
—
—
—
High
—
—
Low High
Low High
Low High
Low —
Replace
—
sensor now
High-High
High-High
High-High
High-High
High-High
—
b
Cable open
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