Description

ABB UVT92M Supervision Relay- Fuse failure relay

ABB UVT92M Supervision Relay, the fuse failure relay is a high speed static relay intended for continuous monitoring of fuses against blowing out or inadvertent removals. This relay can be used for one, two or all three phase fuse failure detection. The plug-in socket type design for terminals, supports ease of installation and maintenance.

Technical Specification

• Type: Electro Mechanical Relay.
• Protection Type: Supervision Relay.

ABB UVT92M Technical Specifications	Details
Model No :	UVT92M
Relay type	UVT92M SUPERVISION
Auxiliary voltage	110V AC, 50 Hz, 30/110/220 V DC
Type of mounting	Flush mounting
Contact configurations	2NO+0NC/ 1NO+1NC
Typical applications	Fuse Failure Supervision

 

UVT92M fuse failure relay Features

• Fast operation
• 1, 2 or 3 phase fuse fail detection
• No continuous drain on D.C. auxiliary supply
• Hand reset LED operation indication
• Sensitivity down to 2.5VA load on secondary

Application
The fuse failure relay is intended for continuous monitoring of fuses against blowing out or inadvertent removals. In application where failure or inadvertent removal of fuse may cause incorrect tripping.
The relay can also be used for supervision of potential transformer fuses so as to give blocking signals to voltage operated protection schemes such as distance protection, under impedance and under voltage relays. It can be used for alarming purpose in synchronizing circuits.

Design and principle of operation
The fuse failure relay is a high speed static relay with built-in electro mechanical output relays providing two change over signaling duty contacts. The relay can operate for single, two or three phase fuse failure in secondary circuit.
During the normal operation, the potential across the fuses is nearly zero. When fuse fail will occur in any of the phase, the potential across the particular fuse goes up. This potential drives the circuit path for external LED indication and relay output.

The fuse fail in any phase is indicated by ‘Trip’ LED and will remain latched until reset push button is pressed and fuse is healthy. After replacing the faulty fuses, the output contacts can be reset. The plug in socket design for terminals facilitates ease of installation and maintenance. The relay is suitable for flush mounting on panel and is
sufficiently protected against any ingress. A unique Plug-in PCBA assembly and sheet metal case makes the relay robust and light weight.

SUPERVISION RELAY

The supervision relay type TCS is intended for a continuous supervision of circuit breaker trip circuit and gives an alarm for loss of auxiliary supply, faults on the trip coil or its wires independent of the breaker position, faults on the breaker auxiliary contacts and faults in the supervision relay. The trip circuit supervision is a crucial requirements as its failure can cause disconnect of possible network fault and eventually have to be cleared by another upstream protection.
In normal condition, the indicator LE D glows green and output relays are in picked-up condition. In the event of a fault, the supervision relay operates (drops-off) after a delay of 0.6 sec and the indicator LED turns red.

TCS RELAY PRODUCT RANGE

• Rated voltage: 24V DC, 30V DC, 48V DC, 100-125V AC/DC, 220-250V AC/DC
• Contact configuration: 1NO+1NC+2C/O
• PN8nCH2J, RXTCS, UVT92M,TCS

MAIN BENEFITS

• Highly reliable
• Personnel as well as power system safety
• Easy site installation

MAIN FEATURES

• Continuous Supervision Of Trip Circuit Independent Of The Circuit Breaker Position
• Galvanic isolation between auxiliary supply and supervision circuit
• Delayed operation to avoid spurious signals during circuit breaker operation
• Enables use in sensitive or high resistance circuits
• Extremely low burden on auxiliary source
• Complete range of rated voltages either AC/DC

Explore the comprehensive range of ABB auxiliary relays with us!