Frequency Window Comparator:

• The Electro 11 pin plug-in range of control and timing devices are to be installed into a standard 11 pin base making installation easy and convenient.
• Output 10A SPDT.
• 10 second start-up delay.
• Latch facility incorporated.
• Measures on own power supply.
• Measures if the frequency is within set limits.
• LED indication for over / under frequency.
• Upper and lower limits separately adjustable.
• Monitoring relay for upper and lower frequency control.