M5 Relay Maintenance; Ambient Temperature - GE 339 Instruction Manual

CHAPTER 7: MAINTENANCE

M5 Relay maintenance

Ambient temperature

339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
The 3 Series relay has a temperature monitor feature that measures the ambient
temperature around the chassis of the relay. The relay extrapolates the ambient
temperature from an internal temperature sensor inside the product. This feature can be
used to signal the customer that the product is being subjected to temperatures that can
degrade the product life and proper action should be initiated. For example the air
conditioning, heating or ventilation system should be checked.
The purpose of the feature is to measure the immediate temperature around the product.
There are several factors that can alter the measurement that need to be considered for
the application of this feature.
• Any forced air flow or obstructions that can interrupt even distribution of the ambient
temperature.
• Installation of the relay should be for normal operation (CT, VT, inputs, outputs).
PATH:
MAINTENANCE > M5 RELAY MAINTENANCE > AMBIENT TEMP
AMBIENT TEMPERATURE
Range: Disabled, Alarm, Latched Alarm
Default: Disabled
For details see Common
HI ALARM LEVEL
Range: 20°C to 80°C in steps of 1°C
Default: 60°C
This setting specifies the temperature level monitored by the Ambient Temperature
Alarm high logic. The alarm will occur when the temperature remains above this level.
LOW ALARM LEVEL
Range: -40°C to 20°C in steps of 1°C
Default: 10°C
This setting specifies the temperature level monitored by the Ambient Temperature
Alarm low logic. The alarm will occur when the temperature remains below this level.
HYSTERESIS LEVEL
Range: 2°C to 10°C in steps of 1°C
Default: 2°C
This setting allows the user to select the dropout level for the feature.
TIME DELAY
Range: 1 to 60 min in steps of 1 min
Default: 1 min
This timer starts when either the high or low level thresholds have exceeded their
respective levels.
OUTPUT RELAY X
Range: Do Not Operate, Operate
Default: Do Not Operate
For details see Common
setpoints.
setpoints.
M5 RELAY MAINTENANCE
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