Operating voltage range
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 : 33 to 135 V the relay is block
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below this limit
Contacts in relay
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 : 3 pair of N/O contact make & carry
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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
Aux Supply from external source : 1.5 VA max at 150 V
Test Voltage : 2 kv/50 Hz 1 min.
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5kv 1.2/50 us
 Aux Supply from PT
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 : 1.5 VA
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Accuracy
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 : + .03 Hz
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Timer Range
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 : .05 to 7.35 Sec. for under & over
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Frequency stage.
No of tripped stage
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 : 2 for UFT -21
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3 for UFT -31
4 for UFT- 41
Reduced values are valid
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in case of repeat testing casing : Does not apply to the terminal connected to a common Aux supply.
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 Frequency setting range : 39.00 to 70. 00 Hz in step of .1Hz
Internal event recording of last three event. The values of parameters at the moment of tripping are recorded on the display.Internal timers are provided for each operating circuits & separate aux. Relays ensure maximum flexibility of operation.ARMO...