DAM2 series Moulded Case Circuit Breaker is new circuit breakers
which have been designed and developed by the company using
international advanced technology. The circuit breakers are of the
following characteristics: compact size, high breaking capacity,
short arc-over distance and shakeproof, is ideal products applied
on land or ships.ApplicationDAM2 (CM1) series the rated insulation
voltage of the circuit breaker is 800V,it is suitable for the
distribution network of AC 50Hz / 60Hz, rated working voltage of
690V and rated current of 1250A, to distribute power and protect
circuit and power equipment from being damaged caused by overload ,
short-circuit, under-voltage and other fault. Also for protection
infrequent conversion of the circuits and infrequent start of motor
and overload, short circuit, under voltage. DAM2 circuit
breaker can be mounted vertically (upright) or horizontally
(transverse). DAM2 MCCB is suitable for isolation and the
symbol is " ". DAM2 MCCB meets the standard: IEC60947-2
"low-voltage switchgear and control equipment, Part 2: circuit
breakers."Normal operating conditions1.Ambient air temperature:
-5ºC~+40ºC, and average temperature in 24h is below
+35ºC.2.Altitude: The altitude of the installation site is not more
than 2000m.3.Atmospheric conditions: The air relative humidity in
the highest temperature +40ºC is not more than 50%; In the low
temperature can have higher relative humidity. The maximum average
relative humidity is 90%, while the average monthly minimum
temperature is +25ºC, and consider the temperature changes in
product on the surface of the gel.4.Pollution Degree: 3.Selection
of instructionsAccording to the pole, it classifies four types:Type
A: N-pole without over-current release components, and N-pole has
been connected all along, and does not act with other three poles
to turn on or off;B-type: N-pole without over-current release
components, and N-pole could act with other three poles (N-pole
turn-on prior to turn-off);Type C: N-pole fixed with over-current
release components, and N-pole could act with other three poles
(N-pole turn-on prior to turn-off);Classification according to
rated current of over-current release:DAM2-63 MCCB has
nine: 6,10,16,20,25,32,40,50,63 A;DAM2-100 MCCB has nine:
16,20,25,32,40,50,63,80,100 A;DAM2-250 MCCB has seven:
100,125,140,160,180,200,225 ,250A;DAM2-400 MCCB has five:
225,250,315,350,400 A;DAM2-630 MCCB has three:
400,500,630 A;DAM2-800 MCCB has three:
630,700,800A;DAM2-1250 MCCB has three: 800,1000,1250A.Remark: 6A
only has electromagnetic (instantaneous) type, is not recommended
specifications.According to the wiring method: wiring in front of
board, wiring on back of board, insertion type of the
board.According to over-current release pattern:
thermodynamic-electromagnetic (double) type, electromagnetic
(instantaneous) type.According to the outfit, it has two types:
with or without outfit.The outfit include inner accessories and
outside accessories: The inner accessories have shunt release,
under-voltage release, auxiliary contact and alarm contact. The
outside accessories are turning handle operation mechanism,
power-driven operation mechanism and so on.According to the
breaking capacity: L-standard breaking type; M-second high breaking
type; H-high breaking typeTechnical parameters1, Instantaneous
action characteristic setting value of the circuit breaker for
distribution is 10In±20%, DAM2-1250 is 7In±20%; Instantaneous
action characteristic set value of the circuit breaker for motor
protection is 12In ± 20%.2, The rated value of the circuit breaker
in Table 2.3, In the ambient temperature of +40ºC, the circuit
breaker for distribution over-current release action
characteristics shown in Table 3, the circuit breaker for motor
protection over-current release action characteristics shown in
Table 4.Rated value of the circuit breakModelPoleRated current
(A)Ratedoperatingvoltage (V)Ratedinsulationvoltage (V)Rated
ultimate short - circuit breaking capacity
(Icu)Flashoverdistance(mm)Test voltage (V)Icu (kA)Ics
(kA)DAM2L-63310,16,20,25,32,40,50,63400500400×1.1025180DAM2M-633,45035DAM2L-1003,416,20,25,32,40,50,63,80,1004008003022≤50DAM2M-1002,3,45035DAM2H-10038550DAM2L-1003,4690105DAM2M-1002,3,42010DAM2L-2253,4100,125,140,160,180,200,2254008003525TXCM1-2252,3,45035DAM2H-22538550DAM2L-2253,4690105DAM2M-2252,3,42010DAM2L-4003225,250,315,350,4004008005035≤100DAM2M-4003,46542DAM2H-400310065DAM2L-4003690158DAM2M-4003,42010DAM2L-6303400,500,6304008005035DAM2M-6303,46542DAM2H-630310065DAM2L-63036910158DAM2M-6303,42010DAM2M-8003630,700,8004008007550DAM2H-800310065DAM2M-800346903015DAM2-12503800,1000,12504008008542DAM2-125036902512.5Note:
2-poles, 4-poles circuit breakers, divided into L, M, H, they have
the same breaking index as M-type.Characteristics of inverse time
breaking action of circuit breakers over-current release for power
distribution when every pole is power-on at the same timeNo.Test
currentI/InSet timeInitial state1Convent
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