JEA USER MANUAL
20 I +44 (1753) 214 500
5.3.2 BAD VOLTAGE BLIND TIME
The JEA provides high and low voltage protection by disconnecting the supply from the compressor and outputs if the
voltage exceeds the set High Voltage Disconnect (HVD) or falls below the Low Voltage Disconnect (LVD) (both configurable).
Once the voltage has returned with the reconnection voltage and delay timers have been satisfied, the JEA will automatically
reconnect the outputs. The JEA permits high and low mains voltages transitions for short periods of time preventing inadvertent
compressor stop-starts. Pre-set values of 0.5 and 2 seconds (configurable) respectively are implemented.
HVD
LVD
ON
Mains
Voltage
OFF
Compressor
Time
Intelligent Time Delay
Less than 2 secs
Intelligent Time Delay
Less than 0.5 secs
5.3.3 INTELLIGENT TIME DELAY
The JEA controller has a built-in intelligent time delay of up to 5 minutes (customer configurable). After a compressor
disconnection period, either from cycling OFF, defrost or HVD / LVD the JEA will automatically adjust the time delay on the
disconnection period before allowing the compressor to turn ON. For example, if the Time delay is set to 3 minutes, a 2-minute
disconnection will result in only a 1-minute additional delay, making the total delay 3 minutes. Any disconnection of 3 minutes or
over and the JEA will immediately turn the compressor ON.
The time delay is essential in allowing compressor gases to neutralise, ensuring that the mains power has stabilised before re-
connection and avoiding a locked rotor condition.
Intelligent Time
Delay (1 min)
Disconnection Period
(2 mins)
Disconnection Period
(7 mins)
ON
OFF
Compressor
ON
OFF
Compressor
To Next Page
Loading...
Need help?
General
