Load Shedding Overview
Single Line Drawing
Applications
The RTS series of unique load shedding controls automatically reduce energy consumption of
connected lighting loads by 25-50% (RTS-0-10V) or 100% (RTS-24,RTS-120,RTS-277) during peak
hours or other specified conditions. A patent pending feature disconnects or dims lighting to deliver
energy savings when they are required most.
Demand Response: RTS can accept demand response signals and automatically disconnect any
light fixture, or dim 0-10V light fixtures by 25 or 50%.
Plug Load/Receptacle Control:
RTS can connect to low voltage occupancy sensors to
automatically switch receptacles on/off based on occupancy.
Emergency Lighting: RTS can detect the loss of utility power and dim 0-10V light fixtures connected
to an emergency inverter system by 25-50%.
The RTS can be mounted in any junction box or most light fixtures by snapping
into a 1/2” Knockout (K.O.) and is economically justified for any project.
Load Shedding
Signal
RTS
Load
Shedding
Circuit
24V or 120V
or 277V
Power Source
LOAD
RTS allows load to operate normally until load shedding signal changes position,
then load is disconnected or dimmed, depending on model.
All RTS models are UL listed and can be used in a variety of applications. Please
consult pages 3-5 for additional information. Contact LVS for special application
guidance or questions.
Electrical Ratings
to
s in
” KO
1/2
h
Hig
p
Sna
Low ge
ta
Vol ut
Inp
age
1-7/8”
8”
/
1-3
RTS-120 and RTS-277 (Type A Enclosure)
1
Enclosure
Input Voltage
Input Power
RTS-120
Type A
120V AC 60Hz
1.2W
RTS-277
Type A
277V AC 60Hz
1.2W
RTS-24
Type B
24V AC/DC
1W
Hig
RTS-0-10V-24
Type B
120V AC 60Hz
0.2W
1”
RTS-0-10V-24
Type B
277V AC 60Hz
0.2W
RTS-0-10V-24
Type B
24V AC/DC
0.2W
Quarter to scale
t
Vol
1-3/8”
Model
to
s in
”
1/2
Low ge
ta
Vol ut
Inp
20A Ballast
20A General Use
1800W Tungsten
age
olt
hV
KO
p
Sna
Load Rating
1-3/8”
1”
RTS-24 and RTS -0-10V (Type B Enclosure)
UL
®
UL LISTED
Sinks up to 200 milliamp
of 0-10V ballasts/drivers
(100+ typical drivers)
See pages 3-5 for application information on RTS models.
2
RTS-24
Load Shedding Controls
Load Shedding Controls
Application #1 Load Shedding (disconnect selected loads)
Application #1: Switching/Load Shedding based on 0-10V Signal
The RTS-24 can be used with an external transformer and dry contact from a BMS system (or
other device such as time clock) to shed connected loads. An LVS TR-100 power supply can
provide up to 250mA (enough for 6 RTS-24) but any 24V transformer or power supply (AC or
DC) may be used.
Some systems do not have a dry contact output, such as wireless systems or some photocells. RTS-120 and RTS-277 can accept input from the 0-10V line from a ballast/dimmer,
when violet and gray are between 1-10V, relay is closed, 0-1V relay is open. Dimmer
When load shed signal opens, RTS-24 de-energizes and sheds load.
RTS-24
Neutral
LOAD
RTS-120/277
Neutral
Load
Shed
Signal
RED
RED
LOAD
Hot
YELLOW
BLUE
YELLOW
Hot
24VAC
120V or 277V
BLACK
BLUE
Hot
Neutral
36 milliamps
low voltage
Application #2: Plug Load/Receptacle Control
When Blue wire is energized (room occupied), RTS-24 energizes plug load.
Power
Pack
RED
Blue
Red
Black
BLUE
Hot
ORANGE/BLACK
WHITE
15 milliamps
(high voltage)
Only 1 milliamp
(low voltage)
Ballast
When Hot/Neutral are energized and voltage between
blue(+)/black(-) (violet/gray) is more than 1V , RTS
relay is closed. Otherwise RTS relay is open.
The RTS-120/277 can be used to control a receptacle (plug load) or lighting circuit using a
DC input signal from an occupancy sensor with power pack or other
DC supply.
Power
Pack
RTS-120/277
Neutral
RTS-24
LOAD
GRAY
Application #2: Plug Load/Receptacle/Lighting Control
The RTS-24 can be used to control a receptacle (plug load) or lighting circuit using a 24V
signal, such as from an occupancy sensor with 24V power pack. For sensors which use other
voltages (such as 12V or 15V), see RTS-120 or RTS-277 on page 4.
Neutral
VIOLET
RED
BLUE
BLACK
Transformer
BLUE
LOAD
Hot
(Typical Power Pack
Colors, Black = COM
Blue = Control)
YELLOW
BLACK
BLUE
36 milliamps
low voltage
Occupancy
Sensor
Note: Do not exceed power pack/transformer maximum output.
Each RTS-24 requires 36 milliamps/1W.
Typical sensor requires 50 milliamps (mA).
Common power pack ratings are 100mA, 150mA or 250mA.
3
RTS-120 & RTS-277
RED
YELLOW
Blue
Red
Black
RED
BLUE
(Typical Power Pack
Colors, Black = COM
Blue = Control)
BLACK
BLUE
Hot
Neutral
ORANGE/BLACK
WHITE
Only 1 milliamp
(low voltage)
Occupancy
Sensor
15 milliamps
(high voltage)
Note: RTS-120/277 can be used when power pack or dimmer control does
not have sufficient power to supply RTS-24. RTS-120/277 requires less than
1mA to energize relay and can be used with any voltage power pack including 12V, 15V, 18V, 24V or other, up to 30VDC max.
4
RTS-0-10V
0-10V Dimming Load Shedding Controls
Application #1 : Load Shedding (Demand Response)
Dimmer
Demand
Response
Signal
RTS-0-10V-24
RED
+24V
ORANGE
YELLOW
GRAY
BLUE
BLACK
COM
VIOLET
GRAY
Ballast
10 milliamps
low voltage
Hot
Neutral
Normal Operation (Demand response contact closed): Load is controlled by dimmer
Load Shedding Operation (Demand response contact open ): Load is dimmed at preset level
Connect Gray for 75% brightness. Connect Blue & Gray for 50% brightness .
Application #2 : Load Shedding (Emergency Lighting)
Dimmer
RTS-0-10V-120 or
RTS-0-10V-277
BLACK/ORANGE
UTILITY HOT
UTILITY NEUTRAL
WHITE
ORANGE
YELLOW
GRAY
BLUE
VIOLET
GRAY
Ballast
10 milliamps
high voltage
Hot
Neutral
EPC Control
Normal Operation: Load is controlled by dimmer
Emergency Operation: Load is dimmed at preset level (50% or 75%).
Connect Gray for 75% brightness. Connect Blue & Gray for 50% brightness.
Note: Emergency Ballast Hot/Neutral should be connected to a UL924 Load Control Relay
such as EPC-1 or EPC-A-1 to ensure they are switched on during a power interruption
5