Factory Stock

Digital Motor Protection Relay (DMPR)
120 VAC Power Input is required
0.5 to 6 Amp range when used without Current Transformers.

For over 6 amps, use three current transformers with 5 amp secondaries, set the Current Dial for the display to read 5 Amps, select current transformers so that the motor rated FLA is close to mid-range of the primary amps, program Function 8 of the relay for the CT ratio, i.e., if the Current Transformer ratio is 150:5 then program the CT ratio for 30.

Order a Current Transformer Motor Protection: Preventing the Burn-out

Models CDP and CRP are current sensing devices.
Loss of phase will give a positive trip with a complete loss

     of phase current. Other voltage sensing devices will

     always see a voltage on all three legs for the reason that

     the unpowered motor leg will act as a transformer and

     therefore give an output voltage to the sensor. The sensor

     will then see three voltages on the motor and will need to

     be finely tuned.
3 Phase Digital Ammeter Function will read each of the

     three phases

Adjustable Trip Amps

Solid State

with Digital Display and Bar Graph Adjustable

Class 1 to 60
Bar Graph reads 60 to 110% of real load current
Seven Segment display gives cause of a fault and also

     current on each of three phases
Delay in starting: 0 to 60 seconds
Delay in operating: 0 to 30 seconds
Control Power Required: 110 VAC nominal, 50/60 Hz, 1 PH
Operational Temperature: -25 to +70 degrees C
Auxiliary Contacts: 2 SPST (when power applied)
Output contacts: 3A, 250 VAC resistive load
Screw Terminals Mounting: 35mm DIN rail or panel

Protects against:
Overcurrent
Undercurrent
Phase Failure
Assymetry
Motor Stall
Locked Rotor
Phase Reversal

Options are available for:
120 VAC Control Power
Ground Fault and Short Circuit Protection
Remote Display with Extension Cable
Tunnel rather than Screw terminals
18 Month Warranty

You may order by telephone: (203) 217-2353
Please have the following information:
Credit Card number
Expiration date Name on the card Credit Card
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Shipping address