Current Sensing Relay
The CR4395 Series, Current Sensing Relay provides an effec-
tive and highly stable method for monitoring electrical current.
The current-carrying wire is routed through the opening extend-
ing from the top of the case. When current reaches the level set
by the trip point adjustment, the relay trips and starts the ad-
justable timer. After the timer cycles the electromechanical relay
is energized. A precision voltage reference circuit ensures a
highly repeatable trip point.
CR4395 Series
Applications
Monitor Electrical Heater Elements
Sense Motor Over/Under Loads
Detect Lamp burn-out
Indicate Phase Loss
OUTPUT OPTIONS
Features
Variable Trip Point and Time Delay
Monitors Currents from 1 AC to 100 AC Amps
Electrical Isolation Between Circuits
Output Relay Rated up to 20 Amps
LED Trip Status Indicator
The Relay is available with three different output
configurations, electromechanical relay, op-
toisolated NPN transistor or optoisolated triac.
Specify desired selection in part number.
Dead Band Prevents Relay Chatter
Calibrated Dial Option Available
External Current Transformers Available
RELAY (-ELR)
Arrangement: 1 Form C (SPDT)
Contact Material: Silver-cadmium oxide
Terminals: 31/4” Male QC
Mechanical Life: 10 million operations,
typ.@ rated load
Electrical Life: 100,000 operations,
typ. @ rated load
Initial Contact Resistance:
Specifications
Mounting:
3/16” dia. clearance holes on 115/16” by 215/16”centers
Environmental:
Operating Temperature: -30° C to +60° C
Storage Temperature: -55° C to +85° C
Power-On Delay: 100 MS MAX
Hysteresis: 5% Max.
D
50 milliohms max. @ 500 mA, 12 VDC
Contact Rating: UL508/873 & CSA
Input Supply Power:
Typical 80mA
Sensed Current:
Max 100mA
DC SWITCHING (-NPN)
Vce (full off): 30 VDC max.
Max. Continuous: 200% Full Scale
Frequency: 60-400 Hz *
*All specifications for operation at 60 Hz only
Altitude: 2000 meters max.
(Contact factory for High Altitude applications)
Weight 0.5 LBS.
Isink (full on): 120 mADC max.@ rated full-on
Vce (full on): 1.5 VDC @ 120 mADC Isink
Off state leakage current: 5ua @ 30 VDC
(typical)
AC SWITCHING (-TRC)
Regulatory Agencies
Off state voltage: 240 VAC RMS max.
Minimum switch voltage: 24 VAC RMS
On state current: 0.5 AAC RMS max. continuous
Switching mode: Zero crossing
Off state leakage: 60 ua @ 240 VAC max.
Terminals: 2 @ 1/4” Male QC
E234389
N.O. CONTACT
20A
VOLTAGE
240 VAC
240 VAC
125 VAC
28 VDC
LOAD TYPE
Resistive
Motor
N.C. CONTACT
10A
2HP
1HP
1/2 HP
1/4 HP
10A
Motor
Resistive
20A
The Professional
Energy Monitoring
Company
3500 Scarlet Oak Blvd. St. Louis MO USA 63122 V: 636-343-8518 F: 636-343-5119
Web: http://www.crmagnetics.com E-mail: sales@crmagnetics.com
M
N TI
62
ISO 9001:2008 Quality Management System
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