Cut Sheet

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080415
# Relays & Contact Type:
Expected Relay Life:
Operating Temperature:
Operate Time:
Relay Status:
Dimensions:
Wires:
Approvals:
Housing Rating:
Gold Flash:
Override (Test Switch):
One (1) SPDT Continuous Duty Coil
10 million cycles minimum mechanical
-30 to 140° F
18mS
LED On = Activated
2.30˝ x 3.20˝ x 1.80˝ with .50˝ NPT Nipple
16˝, 600V Rated
UL Listed, UL924, C-UL, CE
UL Accepted for Use in Plenum, NEMA 1
No
No
Contact Ratings:
20 Amp Resistive @ 277 Vac
20 Amp Ballast @ 277 Vac
16 Amp Electronic Ballast @ 277 Vac (N/O)
10 Amp Tungsten @ 120 Vac (N/O)
770 VA Pilot Duty @ 120 Vac
1,110 VA Pilot Duty @ 277 Vac
2 HP @ 277 Vac
1 HP @ 120 Vac
Coil Current:
50 mA @ 18 Vac
83 mA @ 24 Vac
69 mA @ 208-277 Vac
33 mA @ 22 Vdc
35 mA @ 24 Vdc
47 mA @ 30 Vdc
Coil Voltage Input:
24 Vac/dc ; 208-277 Vac ; 50-60 Hz
Drop Out = 2.1 Vac / 3.8 Vdc
Pull In = 18 Vac / 22 Vdc
Wht/Brn
Utility 208-277 Vac
Wht/Blu
Utility 24 Vac/dc
Wht/Yel
Utility Comm
Blu
Emergency Hot
N/C
Yel
Emergency Hot
to Load
Comm
Org
N/O
Made in USA
Meets
“Buy American”
of ARRA 2009
ESR2402B
Enclosed Relay 20 Amp SPDT with 24 Vac/dc/208-277 Vac Coil
UL924 / 20 AMP EMERGENCY BYPASS / SHUNT RELAY
Specications
Initial Wiring Verication
1. Turn OFF Normal Power, Transfer Power, and Wall Switch.
2. Wire relay according to wiring diagram.
3. Energize Transfer Power. Emergency Light should illuminate.
4. Energize Normal Power. Emergency Light will turn OFF.
5. Turn ON Wall Switch. Emergency Light should illuminate.
Field Inspection
1. Ensure Normal Power and Transfer Power are energized.
2. Turn OFF Wall Switch. Light will turn OFF.
3. Red LED will be illuminated.
4. Turn OFF Normal Power. Red LED will turn OFF. Emergency Light will illuminate.
Emergency
Panel
Normal
Panel
Normal
Neutral
Normal
Breaker
Emergency
Neutral
Emergency
Breaker
Automatic
Transfer
Switch
Generator
or Inverter
Neutral
Generator
or Inverter
Hot
Utility
Hot
Utility
Neutral
Wall Switch
Coil
Emergency
Bypass / Shunt
Relay
N/C
Contacts
Neutral
to Load
Hot
to Load
Hot
to Load
Wht/BrnWht/Brn
Wall Switch
Gry
Prp
Yel
Blu
Shunt Relay Application
Our Emergency Bypass / Shunt Relays are UL924 listed and
suitable for shunting around wall switches in order to turn on
emergency lighting in the event of loss of normal utility power.
When normal power is present, the ESR relay coil is activated
and the emergency panel is fed from normal power. The light-
ing load can be switched on/o using an individual wall switch.
When normal power drops out, the ESR coil is deactivated and
N/C contact falls closed. The automatic transfer switch changes
over to backup (generator) power, and the lighting load is
illuminated regardless of the position of the wall switch or
controller scheme.