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Current Indicators & Relays

Current Indicators & Relays (PDF)



Wire-Mounted
 Remote Current Indicator: 1 Remote Current Indicator: 2

Remote
Current Indicators		 Press-In LED Panel Indicator Splash-Proof LED Indicator

Panel LED Indicators
for Remote
Current Transformers
 Current Sensing Relay

Current Sensing
Relay
Wire-Mounted Current Indicators:
Tempco's wire-mounted electrical current indicators provde an effective method of monitoring electrical current. The indicator is attached directly to a current-carrying wire. When the current exceeds the turn-on point, the LED will illuminate to indicate the presence of current.
Available From Stock



Wire-Mounted Current Indicators: Drawing		 Design Features
  • Self Powered
  • Easy to Install
  • Supplied with Plastic Tie
  • Indicates Current from
    2 to 100 Amps (1 Wire Pass)
Applications
  • Monitor Heater Element Status
  • Observe Remote Loads
 Red LED Indicator
Part Number: CTT00001

Green LED Indicator
Part Number: CTT00002

Panel Mounting Bracket:
Part Number: CTT00003

Wire
Passes		 Turn-On Point (A) Max. Wire Dia. (in)
Red Green
1 2 2.5 .29
2 1 1.25 .14
3 .66 .83 .13
N 2 ÷ N 2.5 ÷ 2 -
Remote Current Indicators:
The Tempco remote current sensing transformer is installed around the current-carrying wire and is connected directly to the LED panel indicator. When the current exceeds the turn-on point of the sensing transformer, the LED illuminates to indicate the presence of current. Two sizes of remote current sensing transformers are available for use with either of two types of LED indicators listed below.
Available From Stock
Typical Applications
  • Indicate Open Heater Elements
  • Observe Remote Loads
  • Indicate Phase Loss
  • Monitor Motor Operation
Remote Current Indicator: 1 Remote Current Indicator: 2
Specifications
Part Number: CTT00004
Max Wire Dia.: .29 inches
Indicating Range: 2 to 100A
Max. Transient Current: 150A for 5 sec.
Working Class: 600 Volts, 50-60 Hz
Lead Wire Length: 12"
Max. Operating Temperature: 140° F/ 60° C 		Specifications
Part Number: CTT00005
Max Wire Dia.: .55 inches
Indicating Range: 2.5 to 100A
Max. Transient Current: 150A for 5 sec.
Working Class: 600 Volts, 50-60 Hz
Lead Wire Length: 24"
Max. Operating Temperature: 140° F/ 60° C

Surface Mounting Bracket
  • Part Number: CTT00006
    For use with model CTT00005 only
  • Dimensions: 1.37" x 1.25"
  • Mounting Dimensions: (2) #6 screws .87" apart
Panel Indicators for Remote Current Transformers
 Available From Stock
Press-In LED Panel Indicator

Press-In LED Panel Indicator with 12" Leads
LED Type: T-1-3/4", Red Bi-Polar
Mounting Hole: .250"
Part Number: CTL00001		 Splash-Proof LED Indicator

Splash-Proof LED Indicator with 12" Leads
Supplied with rubber sealing washer LED Type: T-1-1/4", Red Bi-Polar
Mounting Hole: .312"
Part Number: CTL00002
Current Sensing Relay:
The TEMPCO series of Current Sensing Relays provides an effective and highly stable method for monitoring electrical current. the current-carrying wire is routed through the opening extending from the top of the case. When the current reaches the level set by the trip point adjustment, the electromechanical relay is energized. An adjustable timer is provided to delay activation of the relay. A precision voltage reference circuit ensures a highly repeatable trip point. Design of the power-on delay circuitry allows the supply power to be repeatedly cycled on and off without affecting the stability of the current sensing operation.
Current Sensing Relay Design Features
  • Variable Trip Point and  Time Delay
  • Monitors Currents from 10mA to 100 AC Amps
  • Output Relay Rated Up to 20 Amps
  • LED Relay Status Indicator
  • Dead Band Prevents Relay Chatter
  • Calibrated Dial
  • Electrical Isolation Between Circuits
 Typical Applications
  • Monitor Electrical Heater Elements
  • Sense Motor Over/Under Loads
  • Detect Lamp Burnout
  • Indicate Phase Loss
Current Sensing Relay: Drawing Specifications

Mounting: 2-3/16" dia. clearance holes on 1-15/16" by 2-15/16" centers
Environmental:
   Operating Temperature: -30°C to +60°C
   Storage Temperature: -55°C to +125°C
Power-On Delay: 100 ms max.
Hysteresis: 5% max.
Input Power Supply: 120 or 240Vac, 24 Vdc (Tolerance ±10%)
Input Terminals: 2-1/4" Male Quick Connect
Operating Class: 600 V
Sensed Current:
   Max. Continuous: 200% Full Scale
   Frequency: 60-400 Hz
Output Relay:
   Arrangement: 1 Form C (SPDT)
   Terminals: 3-1/4" Male Quick Connect
   Contact Rating: NO-120/240 Vac: 20A, NC-120/240 Vac: 10A

Common Configurations
(with Calibrated Dial & Standard Relay)

Part
Number		 Trip
Status		 Supply
Voltage		 Trip Range
(Amps)		 Delay
(secO
CTR00201 LC 120 1 to 10 2 to 25
CTR00202 LC-Latch 120 1 to 10 2 to 25
CTR00203 LC 240 3 to 30 2 to 25
CTR00204 LC-Latch 240 3 to 30 2 to 25
CTR00205 LC 240 10 to 100 2 to 25
CTR00206 LC-Latch 240 10 to 100 2 to 25
How To Order
Current Sensing Relays are offered with the options listed in the worksheet below. Create an ordering code by filling in the boxes with the appropriate number and/or letter designation for your requirements and a part number will be assigned, or choose a common configuration from the table above.

Standard lead time is stock to 3 weeks.