DZ518(GV2-LS/LE) Electric Motor Protection Circuit Breaker
Change-Over Switch Controls
Product Description:
DZ518(GV1,GV2,GV3) the series electric motor protection circuit
breaker, uses the modular design, the contour is artistic, the
volume is small, breaks protects, inside sets Hot Relay, the
function is strong, the versatility is good. The DZ518 series
conforms to IEC60947.2 and IEC60947-4.1 as well as the EN60947-1
standard. The switch and the contact device may compose the
electric motor is direct Starts. The DZ518 series outer covering
protection rankmay achieve IP65. This series pooled three types
model product: DZ518(GV2-M, ME) is the electric motor belt
thermomagnetism protection circuit breaker which the button
controls; DZ518(GV2-RS) is the electric motor belt thermomagentism
protection circuit breaker which the change-over switch controls;
DZ518(GV2-LS,LE) is the electric motor belt magnetism protection
circuit breaker which the change-over switch controls (does not
bring hot protection).
Product Advantage:
◆ Adjustable current setting value: when used, it can be adjusted
to the appropriate current setting value indication position
according to the actual working current.
◆ Can simulate the tripping design of the mechanism: the mechanism
can be tripped by TEST, which is convenient for the simulation
test.
◆ Front laser marking: the marking content is clear and durable.
◆ Double breakpoint structure: double breakpoints of contacts,
suppress and disperse arc energy, improve arc extinguishing effect,
improve connection breaking capacity, reduce contact electrical
losses, effectively improve product electrical life.
◆ Thermal magnetic comprehensive protection structure: the product
has multiple protection functions of overload, short circuit,
three-phase unbalance.
Technical Parameters:
Rated current
In(A) | The adjusting
rage of
commuting current | The cutting capacity for rated limit short circuit Icu, the cutting
capacity for rated work short circuit Ics | The distance
of arcs
(mm) | | | | lcu(kA) | lcs(kA) | lcu(kA) | lcs(kA) | lcu(kA) | lcs(kA) | lcu(kA) | lcs(kA) | lcu(kA) | lcs(kA) | | 0.16 | 0.10-0.16 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 40 | | 0.25 | 0.16-0.25 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 40 | | 0.4 | 0.25-0.4 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 40 | | 0.63 | 0.4-0.63 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 40 | | 1 | 0.63-1 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 40 | | 1.65 | 1-1.6 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 40 | | 2.5 | 1.6-2.5 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 3 | 2.25 | 40 | | 4 | 2.5-4 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 3 | 2.25 | 40 | | 6.3 | 4-6.3 | 100 | 100 | 100 | 100 | 50 | 50 | 50 | 50 | 3 | 2.25 | 40 | | 10 | 6-10 | 100 | 100 | 100 | 100 | 15 | 15 | 10 | 10 | 3 | 2.25 | 40 | | 14 | 9-14 | 100 | 100 | 15 | 7.5 | 8 | 4 | 6 | 4.5 | 3 | 2.25 | 40 | | 18 | 13-18 | 100 | 100 | 15 | 7.5 | 8 | 4 | 6 | 4.5 | 3 | 2.25 | 40 | | 23 | 17-23 | 50 | 50 | 15 | 6 | 6 | 3 | 4 | 3 | 3 | 2.25 | 40 | | 25 | 20-25 | 50 | 50 | 15 | 6 | 6 | 3 | 4 | 3 | 3 | 2.25 | 40 | | 32 | 24-32 | 50 | 50 | 10 | 5 | 6 | 3 | 4 | 3 | 3 | 2.25 | 40 |
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Working of Circuit Breaker:
Circuit breakers are made up of pairs of stationary and moving
metal contacts, in addition to an operating coil. Under normal
cases, when the circuit is closed, these contacts touch each other,
allowing an electric current to flow.
For example, these moving contacts are held together due to
mechanical pressure exerted by some other mechanism such as a
spring or compressed air. Beneath a closed circuit breaker,
current-carrying contacts known as electrodes engage each other due
to the pressure of a spring.
Switching and maintenance of the system are done either by opening
or closing the circuit breaker arms. These devices are opened by
applying pressure to the trigger. When there is a fault in the
current flowing through any part of the system, the breaker’s trip
coil is energized, pulling one away from the other, thereby opening
the circuit.
