Accessories for Great Indian Market 01 RelayAux Electromechanical relays for auxiliary, tripping and control / supervision applications CUSTOMER BENEFITS • Plug-in compact design allows easy installation and replacement. • Heavy duty contacts. • High speed operation • Universal change over contacts design facilitates easy selection and inventory reduction. • Sturdy design for maximum reliability. • Zero maintenance. The auxiliary relays range offers varying levels of functionality to best suit the auxiliary, tripping and control/supervision application requirements, and allows the customers to choose the most cost effective solution to their various applications. The design, durability and quality of the RelayAux make them suitable for high responsibility controls such as: • Electrical utilities • Power generation • Electrical substations • Transportation • Industry - Oil & Gas - Food & beverage - Water - Mining, Minerals, metals ... PM103544
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Accessories for Great Indian Market 01
RelayAuxElectromechanical relays for auxiliary, tripping and control / supervision applications
CUSTOMER BENEFITS
• Plug-in compact design allows easy installation and replacement.
• Heavy duty contacts.
• High speed operation
• Universal change over contacts design facilitates easy selection and inventory reduction.
• Sturdy design for maximum reliability.
• Zero maintenance.
The auxiliary relays range offers varying levels of functionality to best suit the auxiliary, tripping and control/supervision application requirements, and allows the customers to choose the most cost effective solution to their various applications.
The design, durability and quality of the RelayAux make them suitable for high responsibility controls such as:
• Electrical utilities
• Power generation
• Electrical substations
• Transportation
• Industry - Oil & Gas - Food & beverage - Water - Mining, Minerals, metals ...
PM103544
RelayAuxAccessories for Great Indian Market 02
Range of productsAUXILIARY RELAYSThe main applications for this auxiliary relays range include
control & alarm functions, contact multiplication, interlocking,
customizing of protection schemes, indications or any other
auxiliary duties.
Models :
• Self reset relay, 4 or 8 contacts• Self reset relay with hand reset flag, 4 or 8 contacts• Electrical reset relay with following flag, , 4 or 8 contacts
TRIPPING RELAYSThe main applications for this high speed trip relays range include
lock out / master trip functions or high speed tripping applications
where auto-recloser is involved, which demands high speed operations.
These relays are used as interface between protection relay and
circuit breaker due to their high capacity contacts
Models :
• Self reset trip relay with hand reset flag, low burden, 4 or 8 contacts• Self reset trip relay with hand reset flag, high burden, 4 or 8 contacts• Electrical reset trip relay with following flag, low burden, 4 or 8 contacts• Electrical reset trip relay with following flag, high burden, 4 or 8 contacts• Hand and electrical reset trip relay with following flag, low burden, 4 or 8
contacts• Hand and electrical reset trip relay with following flag, high burden, 4 or 8
contacts
SUPERVISION RELAYSThe main applications for this supervision relays range include the
continuous supervision of the trip circuit in Pre-closed & Post-closed
conditions of a circuit breaker, the supervision of the master trip relay coil
or the supervision of the DC auxiliary supply circuits of the protection
schemes, avoiding false alarms due to short time drops of supply.
Models :
• DC supply supervision relay, 4 contacts• Trip circuit supervision relay or trip coil supervision relay (single phase
HIGH / LOW BURDEN CONFIGURATIONLow burden high speed tripping relays can be used when the initiating contact is placed close to the tripping relay.
However, in order to avoid unwanted trip relay operation due to pickup or transients, particularly if the relay operating coil is connected to extensive wiring, high burden high speed tripping relays can be used.High burden high speed tripping relays complies with ESI 48-4 international standard, as EB2 class relays.These EB2 class relays are suitable for use in high security circuit breaker tripping circuits, increasing their immunity to capacitance discharge currents.
For relays with rated voltage of 110 V, the relays will withstand, without operating a discharge into their operate circuits of a 10μF capacitor charged to 120% of the higher rated voltage for the relay, i.e 145.2 V.
For relays with rated voltage of 220 V, the relays will withstand, without operating a discharge into their operate circuits of a 10μF capacitor charged to 100% of the higher rated voltage for the relay, i.e 242 V.
RelayAuxAccessories for Great Indian Market 08
Supervision relaysModels DC supply supervision relayConstruction characteristicsContacts no. 4 Changeover
Durability Relay designed to be permanently energized
RelayAuxAccessories for Great Indian Market 09
Supervision relays (cont.)
TRIP SUPPLY +
M +B
TRIP CONTACT
1
11
K1 K2 K1 K2
B1
12 8 2
2
2
2 9 813 129 13
4 55 1 4
TRIP CONTACT
SET RESET
TRIP SUPPLY -
TRIP SUPPLY +
TRIP SUPPLY -
Trip circuit supervision relay can also be used to supervise the trip circuit of the high speed tripping relays. If the circuit being supervised becomes an open circuit, the supervision relay will be de-energized and its output contacts will provide the related indications. In order to achieve this function, the relays should be connected as shown on the schemes :