Honeywell 3400 Installation Instructions Manual page 40

E-MON CLASS 3400 METER
10.2.1 Load Control Display Screen
The E-Mon Class 3400 Meter Load Control Relay is an option (the card includes
load control, pulse input [2], and pulse output [2] - for Load Control, order option
"-X-"Expanded Feature Package); it is used to activate alarming or load control.
The relay contacts are rated for 250 VAC and a maximum of 3 amps load. It can be
used for direct control of alarms under 3 amps or as a pilot duty device for high
loads.
The relay set points are accessed through push buttons on the meter's display
board. The meter's Load Control display screen indicates the load settings.
LOAD: Indicates the actual KW load in
real-time on the meter.
LIMIT: Is the load control set point. It is
set to the desired point for the relay to
activate. Depending on the alarm/
control requirements, this can be used
for either high or low load activation.
VAR: is the relay deactivation setting. It is the point where the relay is deactivated.
The "+" sign indicates that the deactivation point will occur when the load rises
above the set point. This is used when the relay is to be activated on a low load
condition. The "-" sign indicates that the deactivation point will occur when the
load drops below the set point. This is used when the relay is to be activated on a
high load condition. The kw setting indicates the difference from the set point
where the relay will deactivate.
In the example above, the relay is set to activate on a low load condition. The relay
will deactivate when the load rises (+) above the set point by 3.5 kw. (deactivates
at 9 kw).
R: Is the Ramp setting. It indicates the time delay for activation when the setpoint
is reached. This is to prevent relay function on short term load changes, such as a
motor start. The example shows a 5 second delay before the relay activates.
H: Is the Hold setting. It indicates the time delay for relay deactivation when the
load variation is reduced from the variation that was set. The example shows that
there is a 20 second delay before the relay deactivates. This is designed to
prevent short cycling of loads when the relay functions.
To change the settings on the Load Control Screen, complete the following steps:
1. Press the MENU button.
2. The following screen will appear:
—> LOAD CONTROL
DATE & TIME
DEVICE ID
IP SETTINGS
62-0398—02
LOAD: 0.0 KW
LIMIT:5.5 KW
VAR: +3.5 KW
R/H:5/20
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