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General Characteristics: Overvoltage Relay For Supervision of CTS' Circuits

This document provides information about an overvoltage relay for supervision of current transformer secondary circuits. It has adjustable settings for trip level and trip time delay. There are LED indicators and test and reset functions. It has 3 trip relay outputs and 1 time start relay output. Standard setting ranges are provided for voltage regulation and trip time delay.

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69 views2 pages

General Characteristics: Overvoltage Relay For Supervision of CTS' Circuits

This document provides information about an overvoltage relay for supervision of current transformer secondary circuits. It has adjustable settings for trip level and trip time delay. There are LED indicators and test and reset functions. It has 3 trip relay outputs and 1 time start relay output. Standard setting ranges are provided for voltage regulation and trip time delay.

Uploaded by

shekooferiahi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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OVERVOLTAGE RELAY FOR

SUPERVISION OF CTs’ CIRCUITS


UB3/59-S
CAT. B7-98
12-01-99

GENERAL CHARACTERISTICS
Three-phase three-elements sensitive overvoltage relay with adjustable definite time
trip delay complete with time start output relay.
The UB3/59-S is used for supervision of the Current Transformers Secondary circuits
in Busbar differential protection.

SETTINGS
Settings are made on front face by means of two 4-poles DIP-SWITCH that allow to
obtain a wide and accurate setting range for the trip level as well as for the trip time
delay.

SIGNALIZATIONS
! 1 Green led for signalization of auxiliary power supply presence and relay
regular operation.
! 1 Red led for trip signalization.
! 1 Yellow led for start time monitoring.

COMMANDS
! Test spring lever switch: when pressed it simulates a voltage beyond the trip
level and allows the complete functional check of the relay. In one position the
test function does not operate the output relays; in the other it also operates the
output relays.
! Reset after trip of the time delayed output relays R1, R2, R3 can be:
- manual by reset push button on front face
- manual by remote push button connected to the relevant terminals provided ORDERING DATA
on the relay
- automatic with differential by connecting a bridge on remote reset terminals.
• Relay Type
OUTPUT RELAYS
! 3 Trip signal relays with one Change-over contacts rating 5A. • Rated Input Voltage
! 1 Time start signal relay with one Change-over contact rating 5A. • Auxiliary Power Supply
The output relays are normally deenergized (energized on trip).
• Setting Ranges

• Execution

40
OVERALL DIMENSIONS
See Overall Dimensions - 1 Module Relay.

ELECTRICAL CHARACTERISTICS CAT. B7-98


12-01-99
Rated input voltage : 100 V Burden on Input voltage : 0,03VA @ Vn = 100/√3 V
Auxiliary power : Type 1 : 24-110V d.c./a.c. ±
supply 20% 3W(d.c.);
Burden on supply voltage :
Type 2 : 90-220V d.c./a.c. ± 6VA(a.c.)
20%

STANDARD SETTING RANGES (Different on request)


VOLTAGE REGULATION TRIP TIME DELAY
! Vs = [a0 + (0 ÷ 15)] V ! T = [1+(0 ÷ 15)] x Kt(s)
! a0 = 2 : Vs = (2 ÷ 17) V step 1 V ! Kt = 1 : T = (1 ÷ 16) s step 1s

WIRING DIAGRAM

Vn (phase-to-phase)

100V

41

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