EC500 Controller Handbook
Copyright © 2019 Eaton Corporation. All Rights Reserved.
Issue A March 2019
Page 44 of 107
LOAD LVD
The user can define up to 4 Load connect & disconnect thresholds.
Configuration
Parameter
Description
Where to find:
Load x Low Voltage
Disconnect
Threshold
Indicates
“
disconnect voltage threshold
”
for Load x
contactor.
Display:
Menu>Settings>DC Settings
> LLVD Settings
Web:
Home>Settings>DC Settings
>LLVD Settings
Load x Low Voltage
Re-connect Offset
Indicates
“
re-connect voltage offset
”
for Load x
contactor.
Refer Hardware Channel Mapping on page 74 for LVD physical channel mapping.
TYPICAL LVD ARRANGEMENTS
The simplest use of an LVD is as a single battery disconnect contactor.
The following diagram shows a typical arrangement of one battery and one Load LVD. This arrangement allows
lower priority loads to be disconnected first (contactor controlled by control channel LLVD 1), at a specified
battery voltage lower than Battery LVD. This prolongs battery availability for the higher priority loads
(contactor controlled by control channel BLVD). The battery will be disconnected when the battery voltage
reaches its BLVD set threshold.
LVD OPERATION
The battery LVD operates (opens) if the bus voltage is below the BLVD Set Threshold. Battery LVD will
reconnect if Battery voltage is higher than BLVD Restore Threshold. A fixed delay of 15 seconds is provided
before operating (activating / de activating) the LVD when voltage conditions are met.
The load LVD operates (drops) if Bus voltage falls below the respective LLVD Set Threshold. Load LVD will
reconnect when Bus voltage rises above respective LLVD Restore point. A fix delay of 15 seconds is provided
before operating (activating / de activating) LVD when voltage conditions are met.
