Numerical under frequency relay

Listing ID #3904667

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Aux Supply from external source1.5 VA max at 150 V
Burden
Reference frequency4 MHZ
Supply Type Manufacturer, Exporter, Supplier
Preferred Buyer Location All over the world

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Product Details

Accuracy + .03 Hz
AC voltage rating 110,220 VAC
Reset Ratio 100%
Reference frequency 4 MHZ
Aux Supply from PT 1.5 VA
Aux Supply from external source 1.5 VA max at 150 V
Frequency setting range 39.00 to 70. 00 Hz in step of .1Hz
Contacts in relay 3 pair of N/O contact make & carry 7500 VA for 0. 25 with maxima of 30 A & 300 VAC or DC Carry contentiously 5 A AC/DC. Break 1250 VA AC/50 W DC resistive, 25 W L/R = 0. 04 S. Subject to maxima of 5A & 300 V
Burden
Operating voltage range 33 to 135 V the relay is block below this limit
Test Voltage 2 kv/50 Hz 1 min. 5kv 1.2/50 us
Casing Flush mounting with rear connection 96x 192 / 192 x 192 x 200/250 mm W H D
Timer Range .05 to 7.35 Sec. for under & over Frequency stage.
No of tripped stage 2 for UFT -21 3 for UFT -31 4 for UFT- 41
Auxiliary supply voltage 30-220 V DC
Guaranteed operation – 10 + 55° C
Aux DC (without tripping relays) 11 W for 4 stages
Reduced values are valid in case of repeat testing casing Does not apply to the terminal connected to a common Aux supply.

A switch is provided to select either an independent made of operation of three or four channels or select the under/over frequency made of operation.

The test switch, tripping indications & reset button are provided on the front of Relay.

The relays are suitable for any application in industrial plants & to generators where definite time under/over frequency protection is required

Internal timers are provided for each operating circuits & separate aux. Relays ensure maximum flexibility of operation.

Internal event recording of last three event. The values of parameters at the moment of tripping are recorded on the display.

Two terminals are provided for the voltage input to the frequency sensing circuit the measurement of the frequency is digital for which only the zero crossing of the system voltage & not its amplitude are of consequence the relay is independent of the voltage fluctuations with a wide range. However the system voltage sink below a predetermined value in which the accurate measurement can no longer be expected the under voltage blocking circuit blocks all the outputs.

Operations of the relay can be tested by means of a test, button which energies the output relays & LED’s after set time delay with the channels set to under/over frequency operation. Access to the test push button requires removal of the front cover. This test facility should normally only be used with the relay trip circuits isolated

Features

Low Burden
Wide operating voltage range
Wide frequency setting range 39. 00 to 70. 00 Hz
Independently adjustable tripping stages.
Consistent accuracy (± .03 Hz)
Unaffected by voltage fluctuations
Insensitive to harmonics & transient
Built in timer(.1 to 99.9 Sec.)
Built in event recorder for last three events.
Under frequency & over frequency relay with 2 to 4 frequency stages.
Adjustable under voltage blocking level.
Field Adjustable relay rated frequency
One operate time can give to each frequency stage.
Protection stages can be separately blocked via internal blocking inputs.

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Company Details

Since its incorporation in 1983, ARMO Electronics and Electricals (I) has evolved with a sole motive of providing excellent and reliable power conditioning solution. We are continuously expanding our spectrum at global market place with our quality power conditioning products.
Right from the starting, we have been growing remarkably owing to our policy of incorporating the latest technology into manufacturing of our product line. Uninterrupted Power supply (UPS) systems, Battery Chargers, Static Relays, and Servo Stabilizers. With our independent and creative R&D capability and customer-oriented and market-driven strategy, we have started offering Software interface, remote monitoring, redundant systems, etc. In short for all these years ARMO has always been ahead in offering latest technology, best quality, highest engineering standards & ultimate reliability in the products manufactured & supplied.
We are an ISO 9001:2008 accredited company. We already have a wide network of Distributors & Dealers all over the country. They all have sufficient trained manpower with them which ensures best support to our customer. The process of appointing dealers/ distributors in unrepresented areas is on and continuous efforts are made to expand our base on this line.