ABB Combiflex Relays are high-performance modular relays designed for reliable operation in protection, control, and automation systems. These relays include Auxiliary, Tripping, Signalling, And Supervision Functions, making them suitable for critical electrical and industrial applications.

	COMBITEST system for relay testing The test equipment portfolio consists of the COMBITEST test switches, test handles, and accessories. The COMBITEST test switches enable fail-safe in-service testing of protective relays.
Auxiliary relays Auxiliary relays are intended for installations where high operating requirements exist, either in terms of operating time or contact rating (heavy breaking duty), or where normal industrial-type relays are not suitable.
	Measuring Relays Hitachi Energy’s measuring relay portfolio consists of mainly static or microprocessor-based voltage measuring relays. We have variants that can measure AC only or AC and DC in a single module.
Protection Assemblies COMBIFLEX protective assemblies offer single- or three-phase measurement and protection functions like voltage, current, frequency, etc. Protective assemblies are built by combining measuring and auxiliary relays.
	Relay Accessories The accessories are an integral part of the COMBIFLEX building system. They consist of apparatus bars, a 19" equipment frame, terminal bases, various flush mounting cases, and sockets.
Supervision & Signalling Signalling relays contain a mechanical flag to indicate the operation of the relay. They are used for operation indication of protection functions in a protective assembly, for DC supervision, or with transformer mechanical protections as indication and contact multiplication relays.
	Time relays The time delay relays in the COMBIFLEX portfolio consist of relays with pick-up delay, drop-out delay, or summation functions. Typical applications include delayed tripping in protection applications or as time delay elements in automation control equipment and industrial processes.

The COMBIFLEX-S family of relays has a simplified design in terms of mounting and connection. The relays can be directly flush or DIN-rail mounted without the need for additional relay cases or equipment frames. Standard ring or fork type lugs can be used to terminate the wiring. Up to two wires of 2.5 sq. mm, each can be connected per terminal. The COMBIFLEX-S family of relays still retains the functional and technical data of the proven COMBIFLEX family.

COMBIFLEX-S offers additional choices with regard to mounting and connection options. This series is available to customers who prefer direct flush mounting and screw type connections using ring or fork type lugs. The COMBIFLEX-S family of relays still carries the robust design of the COMBIFLEX relays.

The auxiliary relays are used as an interface between the protective relay and the circuit breaker, or as contact multiplication or signalling relays when used with protective relays or with primary equipment such as a circuit breaker or isolator. The various accessories form a part of the COMBIFLEX building system, which offers flexibility in mounting while also maintaining a very high level of safety.

It is also possible to combine COMBIFLEX auxiliary relays with Relion® protection and control family products or other protection relays to add functionalities such as lock-out, lock-out reset, or external contact reinforcement.

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