R-K Electronics, Inc.

Operation

An AC input voltage of 115VAC must be provided to the ZVM continuously. While the ZVM will drop-out and pick-up based on an adjustable millivolt set point, the signal circuit will accept up to 600VAC. With no voltage on the signal terminals, the internal relay is energized, transferring the output contacts. When the voltage exceeds the set point, the relay will de-energize. When used on Zero Speed applications, a loss of input voltage will cause the relay to remain de-energized as if the motor were still running. Reverse operation is available. For DC current sensing, select a 100mVolt shunt of the correct current rating and connect the shunt in series with the load and in parallel with the ZVM’s signal terminals.

 

Specifications

Electrical

Input Voltage: 115VAC ±10%

Frequency: 50/60Hz

Set Point Range: Adjustable

Adjustable: 40 to 400 millivolts

Differential: 1 millivolt, Approx.

Overvoltage: Accepts up to 600 Volts on signal terminals

Signal impedance: 100,000 Ohms, Minimum

Response Time: Pick-Up of Relay with

Decreasing Voltage: 0.5 Sec. Fixed

Power Consumption: 5VA

Output Contacts:

     1/3 HP @ 120/240VAC

     10 Amps @ 120VAC

     100,000 Full Load Cycles

     50,000,000 Mechanical Cycles

 

Physical

Mounting: Surface

Termination: Screw Terminals

Packaging: Open Printed Circuit Board

Weight: 11 oz. Approx.

 

Ambient Temperatures

Operating: 0°C to 65°C

Storage: -30°C to 85°C