Marathon TS 910 - 18.16 LOAD SHED

TS 910 TRANSFER SWITCH
PM140 REV 2 14/01/23 49 Thomson Power Systems
18.16 LOAD SHED
Load Shed operation can be configured to three different settings as follows:
1. Disabled (Factory Default)
2. Basic
3. kW Load Management
The transfer switch is supplied from the factory with the Load shed disabled. Refer to the
following table for detailed description of load shed operating modes, their application and
settings required on the TSC 9.
Load Shed
Feature
Application
Feature Description
TSC 9 CT
Jumper
Position
TSC 9 kW
Settings
Disabled
(factory
default)
Load Shed feature not used
for applications using Genset
& ATS which are sized for
whole house load
Load Shed Relay & Status
LED Indicator are disabled
None
00
Basic
Basic load shed feature used
when Genset is sized for only
partial home load and
requires automatic control to
shed selected non-essential
load.
- Load Shed Relay &
Status LED Indicator are
enabled on TSC 9
controller
- Load Shed Relay & LED
are activated whenever
Generator is On Load and
resets when load returns to
utility power
- Normally Closed contact
opens during Load shed
condition to open control
circuit of connected non-
essential load
None
>00
Setting
kW Load
Manageme
nt (feature
sold
separately-
refer to
associated
instructions
for further
details)
kW Load Management Load
shed used when Genset is
sized for only partial home
load and requires automatic
control to shed selected non-
essential load. Feature
provides added benefit of
maximizing available
generator capacity where
home loads vary over time.
Requires additional Current
Transformers
- Load Shed Relay &
Status LED Indicator are
enabled on TSC 9
Controller
- Load Shed Relay & LED
are controlled via CT input
signal (refer to kW load
Management sequence of
operation)
- Normally Closed contact
opens during Load shed
condition to open control
circuit of connected non-
essential load
200A or
400A CT
Position
(100A Model
uses 200A
CT)
>00
Setting
to be
95% of
Gen kW
rating
When Load shed operation is required, the load shed output relay contact must be
connected to control an external non-essential load. The output contact is normally closed
and opens when a load shed condition is activated. The output contact is rated for 5A,
240VAC (resistive) maximum. The output contact can be directly connected to control
devices such as air conditioners with thermostat control input.