EKM8E Electronic adjustable type MCCB
EKM8E Electronic adjustable type MCCB
EKM8E Electronic adjustable type MCCB

EKM8E Electronic adjustable type MCCB Molded Case Circuit Breaker

EKM8E series electronic circuit breakers are applicable for low-voltage power systems of AC 50Hz, rated operating voltage up to 1000V and rated operating current from 16A to 800A.

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EKM8E Electronic adjustable type MCCB Molded Case Circuit Breaker

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Product Profile

Molded Case Circuit Breaker with Electronic Over Current Release: The feature discriminating electronic circuit breakers from thermal-magnetic breakers is to control the over current releases with electronic circuits. Electronic control is performed via microprocessor. During design of the electronic circuit, worst possibilities to encounter in operation have been taken into consideration. In high circuit currents, direct opening has been ensured without operating electronic circuit.  Rated and Instant opening current adjustment areas of electronic circuit breakers are quite wide. This feature allows wide use opportunity to the breaker Furthermore, electronic circuit breakers are not affected by ambient temperatures.

EKM8E series electronic circuit breakers are applicable for low-voltage power systems of AC 50Hz, rated operating voltage up to 1000V and rated operating current from 16A to 1250A.

 

Ambient and installation conditions

● Altitude up to 2000m;
● Ambient medium temperature should be within -10℃ to +55℃;
● It can withstand the effect of damp air;
● It can withstand the effect of salt fog or oil mist;
● It can withstand the effect of moulds;
● It can withstand the effect of nuclear radiation;
● The max inclination is 22.5℃.
● It still can work reliably when the ship subjects to normal vibration;
● It can still work reliably if the product subjects to the earthquake (4g).
● Places where the surrounding medium is free from explosion danger, and far away from gas or conductive dust that would erode the metal or destroy the insulation;
● Keep away from rain or snow.

 

Product Features

● Circuit breaker can be equipped with undervoltage release, shunt release, auxiliary contacts, alarm contacts, electric operating mechanism, rotary operating handle and other accessories.
● Circuit breaker has protection functions of overload long delay, short-circuit short delay and short-circuit
instantaneous protection, the user can set the required protection characteristics (user only needs to operate the DIP switch for settings of protection function parameters).
● Circuit breaker has ground fault and thermal analog protection functions, pre-alarm indication over-current
indication, load current indication, digital current analysis technology, and it can achieve a higher level of protection.

 

Panel and function description

 

 

Panel adjustment knob as follows in turn:

● IR(A) Isd(x IR) Ii (x IR)
● IR: Overload long delay tripping setting current; Isd: Short-circuit short delay tripping setting current;
● Ii: Short-circuit instantaneous tripping setting current;

 

The rest parameters are set by factory default, or set by remote communication, as follows:

● tR: Overload long delay setting time, factory default: 60s;
● tsd: Short-circuit short delay setting time, factory default: 0.1s;
● Ip: Overload pre-alarm setting current, factory default: 0.85*IR;

 

Intelligent communication port (COM):

1:Power supply input DC24V (+) 6:485B-
2:Power supply input DC24V (-)  7:Closing and opening common terminal of electric operating mechanism
3:485A+ 8:Closing and opening common terminal of electric operating mechanism
4:485A+ 9:Opening of electric operating mechanism
5:485B- 10:Closing of electric operating mechanism

 

Panel With Residual Current Protection
1: Setting current in overload indicator, the red light will go on when the operation current is ≥ 105% In  
2: Pre-alarm current Ip indicator, the yellow light starts flashing when operation current is ≥ Ipx90%
3: When operation current is ≥ 60% xln setting current, the green light will go on
4: The code switch for residual current setting
5: The code switch for leakage action time setting

Technical Data

EKM8 E L
Product code Adjustable type Rated residual operating current
Moulded-case
circuit breaker
E: electronic adjustable L: residual-current circuit breaker
Quick fixed type
30、50、100、30、100、200、30、100、500、100、200、300
100、300、500、300、500、1000
Quick adjustable type
30、50、100、30、100、200、30、100、500、100、200、300
100、300、500、300、500、1000
160 P 3
Code of frame size current Code of operating mode Pole number
lnm=160
lnm=250
lnm=400
lnm=800
P: electric operation
Z: rotary handle
W: direct operation
①Electric operation
DC1,DC2,DC3
3: 3-pole
4: 4-pole
400 2 A
Code of release type
and internal accessory
Code of different applications Code of four-pole product
2: intelligent release
Accessory code, see table 1
1: power distribution
2: motor protection
A: N-pole without protection, cannot close or open
B: N-pole without protection, can close and open  
C: N-pole with protection, can close and open
D: N-pole with protection, cannot close or open

 

Frame current (A) 160 250 400 630 1250
Model EKM8Е-160H EKM8Е-250H EKM8Е-400H EKM8Е-630H EKM8Е-1250H
Pole number 3, 4 3, 4 3, 4 3, 4 3, 4
           
Rated current (A) 16-32, 40-125,80-160 16-32,40-125,80-160,100-250 200-400 200-400,300-630 400-800,800-1250
Rated voltage (V) AC400V
Rated insulation voltage (V) AC1000V
Short-circuit breaking capacity (KA)Icu/Ics AC400V 35/25 35/25 50/35 50/35 65/50
Operating cycle number Electrical life 1500 1000 1000 1000 1000
Mechanical life 7000 7000 4000 4000 4000

Outline dim(mm) a-b-c-ca

 
3P 90-155-88-115 105-165-88-115 140-257-103-155 140-257-103-155 210-257-103-155
4P 90-155-88-115 140-165-88-115 185-257-103-155 185-257-103-155 280-257-103-155
 
Weight (kg) 3P 1.8 2.1 5.5 5.7 5.7
4P 2.3 2.6 7 7.5 7.5
Electric operating device (MD)
External driving operating handle
Automatic release Electronic type

Dimensions

Product selection form

Reference No. Specification
EKM8E-160H-3-0032 Electronic type MCCB 3P 12-32A ICU/ISC:35/25KA
EKM8E-160H-3-0063 Electronic type MCCB 3P 25-63A ICU/ISC:35/25KA
EKM8E-160H-3-0100 Electronic type MCCB 3P 40-100A ICU/ISC:35/25KA
EKM8E-160H-3-0125 Electronic type MCCB 3P 50-125A ICU/ISC:35/25KA
EKM8E-160H-3-0160 Electronic type MCCB 3P 63-160A ICU/ISC:35/25KA
EKM8E-250H-3-0200 Electronic type MCCB 3P 80-200A ICU/ISC:35/25KA
EKM8E-250H-3-0250 Electronic type MCCB 3P 100-250A ICU/ISC:35/25KA
EKM8E-400H-3-0315 Electronic type MCCB 3P 126-315A ICU/ISC:50/35KA
EKM8E-400H-3-0400 Electronic type MCCB 3P 250-400A ICU/ISC:50/35KA
EKM8E-630H-3-0400 Electronic type MCCB 3P 200-400A ICU/ISC:50/35KA
EKM8E-630H-3-0500 Electronic type MCCB 3P 200-500A ICU/ISC:50/35KA
EKM8E-630H-3-0630 Electronic type MCCB 3P 400-630A ICU/ISC:50/35KA
EKM8E-800H-3-0630 Electronic type MCCB 3P 400-630A ICU/ISC:65/50KA
EKM8E-800H-3-0800 Electronic type MCCB 3P 500-800A ICU/ISC:65/50KA
EKM8E-1000H-3-1000 Electronic type MCCB 3P 630-1000A ICU/ISC:65/50KA
EKM8E-1250H-3-1250 Electronic type MCCB 3P 850-1250A ICU/ISC:65/50KA
EKM8E-160H-4-0032 Electronic type MCCB 4P 12-32A ICU/ISC:35/25KA
EKM8E-160H-4-0063 Electronic type MCCB 4P 25-63A ICU/ISC:35/25KA
EKM8E-160H-4-0100 Electronic type MCCB 4P 40-100A ICU/ISC:35/25KA
EKM8E-160H-4-0160 Electronic type MCCB 4P 63-160A ICU/ISC:35/25KA
EKM8E-250H-4-0250 Electronic type MCCB 4P 100-250A ICU/ISC:35/25KA
EKM8E-400H-4-0400 Electronic type MCCB 4P 250-400A ICU/ISC:50/35KA
EKM8E-630H-4-0400 Electronic type MCCB 4P 200-400A ICU/ISC:50/35KA
EKM8E-630H-4-0630 Electronic type MCCB 4P 400-630A ICU/ISC:50/35KA
EKM8E-800H-4-0630 Electronic type MCCB 4P 400-630A ICU/ISC:65/50KA
EKM8E-800H-4-0800 Electronic type MCCB 4P 500-800A ICU/ISC:65/50KA
EKM8E-1000H-4-1000 Electronic type MCCB 4P 630-1000A ICU/ISC:65/50KA
EKM8E-1250H-4-1250 Electronic type MCCB 4P 850-1250A ICU/ISC:65/50KA
EKM8E-800H-4-0630 Electronic type MCCB 4P 300-630A 65KA
EKM8E-1000H-4-1000 Electronic type MCCB 4P 630-1000A 65KA
EKM8E-1250H-4-1250 Electronic type MCCB 4P 850-1250A 65KA

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