Reverse Power Relay Market: Overview
An electrical regulated switch is known as a relay. Relays are
widely used where a number of circuits need to be controlled by single signal or
by other low-power signal. Reverse power relay is a directional protective
relay, which protects back flow of power in reverse direction. A relay is used
to prevent back flow of power from an active generator to the utility or other
generator when a generator operates in parallel with another generator or
utility. The relay inspects the power from a generator and in case the power
output drops below the set value it disconnects the generator coil to prevent
power flow into the stator coil.
A reverse power relay is built from lightweight non-magnetic
aluminum disc enclosed in two iron core electromagnets which are fixed on a
spindle. The upper magnet is wound with voltage coil, while the other output
magnet is wound with a current coil, which is connected to the same phase as
that of the voltage coil. The current passes through the aluminum disc to
generate eddy current. However, torque is developed due to the formation of
eddy current, which tries to rotate the disc. In normal conditions, the trip
contact on the disc is open and rotation is restricted by stoppers; however, if
a reverse power starts to flow the disc rotates in the opposite direction.
The selection of reverse
power relay depends upon factors such as sensitivity of reverse power
relay, time delay in reverse power relay, number of phases, power
supply, nominal voltage and current, frequency of operation, operational
environment, and mounting. A sensitivity of reverse power relay specifies the
power setting for activation of a tripping mechanism. The setting is depends on
the application. Time delay deals with the time required by the relay to
disconnect the power when the preset limit is met. Some relays have inbuilt
time delay mechanism, while some have instant cut down mechanism. The relay can
be used for a Single-Phase or three-Phase depending upon the application.
The three-Phase relay is available in with three-phase four wire relay or
three-phase three wire relay. The nominal voltage ratings of the system should
be 110, 230, 380, 415 and 480 volts, and 2, 4, 6, 8 and 10 A or 5 A are the
nominal current ratings. The operational frequency of the system needs to be
50, 60, and 400Hz for proper functioning of a reverse power relay. The
operational environment refers to the surrounding temperature. Mounting can be
of DIN rail mounting, panel, or wall mounting.
Reverse Power Relay Market: Key Segments
The global reverse power relay market can be segregated into
type, end-use, and region. Based on type, market can be bifurcated into
single-phase and three-phase. The single-phase relay has only one measuring
element. This relay can be used to protect generators from reverse power
conditions. It is used to prevent power flow from small gen-sets to grid and to
detect failure in the grid. The three-Phase reverse power relay is used for
three-Phase connections and functions that are similar to the Single-Phase
reverse power relay. In terms of end-use, the reverse power relay market can be
classified into telecom equipment and household automation.
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Reverse Power Relay Market: Regional
Outlook
Based on region, the global reverse power relay market can be
split into North America, Asia Pacific, Europe, Latin America, and Middle East
& Africa. Asia Pacific is expected to lead the global reverse power relay
market during the forecast period, followed by North America. The reverse power
relay market in Asia Pacific is anticipated to expand at a rapid pace during
the forecast period. Latin America and Middle East & Africa are likely to
account for small share of the reverse power relay market.
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Reverse Power Relay Market: Key Players
Key players operating in the global reverse power relay market
include ABB, Eaton, Siemens AG, Alstom, OMRON Corporation, and Schneider
Electric.
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