Frequency Monitors

Description

The Model 2922 Frequency Monitor is designed to monitor power line frequency. It is intended for systems where line frequency variations will cause improper operation of electrical equipment.

A solid-state sensing circuit drives two internal electromechanical relays. One relay is energized when the line frequency is high and the other relay is energized when the line frequency is low. Operating power is drawn from the same line being monitored.

The Model 2922 is set to the over and/or under frequency trip points using ten binary-coded switches. A frequency variation outside the trip points causes the appropriate relay to energize and an appropriate LED indicator to illuminate.

Applications for the Model 2922 include standby power plants, portable power supplies, and windmill generators.

Specs

Model

2922-XXX

Input Voltage 

XXX= 24, 120 or 240

Operating Frequency

45-1023 Hz

Response Time

1 second

Transient Protection

2500VRMS for 10msecs

Contact Rating

SPDT x2 10amps at 240VAC resistive  

Expected Relay Life Mech:   10 million operations
Elec:     100,000 operations at rated load
 
Operating Temp

- 40º to +122º F 

Humidity Tolerance

0-97% without condensation 

Enclosure Material

 ABS Plastic

Weight

12 oz.

 

ORDERING:

Model 

Nominal (VAC) 

 Operating Voltage 

2922-24 

24 

20-30 

2922-120 

120 

90-130 

2922-240

240 

190-240 

 

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