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EKM8T adjustable range of Moulded Case Circuit Breakers are designed and manufactured to world-class standards. Provide overload and short-circuit protection for all applications. The thermal elements, adjustable over a wide band, make these MCCBs ideal for any distribution application.
20A to 1250A in 6 frame sizes in three pole and four pole with switched execution.
Compact dimensions
Adjustable thermal setting (70-100%) In.
Push to trip button provision.
Separate main and arcing contacts
Wide range of accessories.
| EKM8 | T | 160 | H | |||
| ↓ | ↓ | ↓ | ↓ | |||
| Product code | Adjustable type | Code of frame size current | Breaking capacity ICU/ICS (kA) | |||
| Moulded-case circuit breaker (MCCB) | T: thermomagnetic adjustable T/A: single adjustable (i.e. thermal adjustable \Magnetic fixed) |
160, 250, 400, 630, 800 Note: 160 is upgraded type of 100 frame 225 is upgraded type of 250 frame 630 is upgraded type of 400 frame |
S | H | ||
| 160 | 25/18 | 35/25 | ||||
| 250 | 25/18 | 35/25 | ||||
| 400 | 35/25 | 50/35 | ||||
| 630 | 35/25 | 50/35 | ||||
| 1250 | 50/35 | 65/50 | ||||
| H-high performance 70KA | ||||||
| Z | 3 | 300 | 160 |
| ↓ | ↓ | ↓ | ↓ |
| Code of operating mode | Pole number | Code of release type and internal accessory | Rated current (A) |
| P: electric operation Z: rotary handle W: direct operation ①Electric operation DC1, DC2，DC3 |
3: 3-pole 4: 4-pole |
the first digit represents release type 2: Has instantaneous release only 3: Complex release Note: Later two digits are the code of accessories (see accessory table 1) |
160 20-25,25-32,32-40,40-50,50-63, 63-80,80-100,100-125,125-160 250 100-125,125-160,160-200,200-250 400 200-250,250-320,320-400 630 400-500,500-630 1250 630-800,800-1000,1000-1250 |
| 2 | A |
| ↓ | ↓ |
| Application | Code of four-pole product |
| 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 |
| Q1 | D1 | Q | 2 | |||
| ↓ | ↓ | ↓ | ↓ | |||
| Accessory voltage | Electric operation voltage | Installation methods | Install wiring board or not |
|||
| Q1: AC220V | F1: AC220V | J1: AC125V | D1: AC220V | D5: AC230V | Q: Front-board H: Back-board C: Plug-in type |
1: No 2: Yes |
| Q2: AC240V | F2: AC380V | J2: AC250V | D2: AC230V | D6: AC110V | ||
| Q3: AC380V | F3: DC110V | J3: DC125V | D3: AC380V | D7: DC220 | ||
| Q4: AC415V | F4: DC24V | J4: DC24V | D4: AC400V | D8: DC110 | ||
| D9: AC110-240V | ||||||
| D10: DC100-220V | ||||||
| Note: Adaptable voltages for two electrics operations. Please refer to the Introduction of external accessory |
||||||
| Frame current (A) | 160 | 250 | |||||
| Model | EKM8T-160S | EKM8T-160H | EKM8T-250S | EKM8T-250H | |||
| Pole number | 3, 4 | 3, 4 | |||||
  |
  |
||||||
| Rated current (A) | 20-25, 25-32, 32-40, 40-50, 50-63, 63-80,80-100, 100-125A, 125-160A |
100-125, 125-160, 160-200, 200-250A | |||||
| Rated voltage (V) | AC400V | AC400V | |||||
| Rated insulation voltage (V) | AC1000V | AC1000V | |||||
| Short-circuit breaking capacity (KA)Icu/Ics | AC400V | 25/18 | 35/25 | 25/18 | 35/25 | ||
| Operating cycle number | Electrical life | 3000 | 3000 | ||||
| Mechanical life | 7000 | 7000 | |||||
Outline dim(mm) a-b-c-ca  |
|||||||
| 3P | 90-155-68-90 | 90-155-88-115 | 105-165-68-92 | 105-165-88-115 | |||
| 4P | 120-155-68-90 | 120-155-88-115 | 140-165-68-92 | 140-165-88-115 | |||
| Weight (kg) | 3P | 1 | 1.1 | 1.5 | 1.7 | ||
| 4P | 1.1 | 1.7 | 1.9 | 2.1 | |||
| Electric operating device (MD) | ● | ||||||
| External driving operating handle | ● | ||||||
| Automatic release | Thermal electromagnetic type | ||||||
| Frame current (A) | 400 | 630 | 1250 | ||||
| Model | EKM8T-400S | EKM8T-400H | EKM8T-630S | EKM8T-630H | EKM8T-1250S | EKM8T-1250H | |
| Pole number | 3, 4 | 3, 4 | 3, 4 | ||||
  |
  |
  |
|||||
| Rated current (A) | 200-250, 250-320,320-400 | 400-500, 500-630 | 630-800,800-1250 | ||||
| Rated voltage (V) | AC400V | AC400V | AC400V | ||||
| Rated insulation voltage (V) | AC1000V | AC1000V | AC1000V | ||||
| Short-circuit breaking capacity (KA)Icu/Ics | AC400V | 35/25 | 50/35 | 35/25 | 50/35 | 50/35 | 65/50 |
| Operating cycle number | Electrical life | 2000 | 2000 | 1500 | |||
| Mechanical life | 4000 | 4000 | 4000 | ||||
| Outline dim(mm) a-b-c-ca   |
|||||||
| 3P | 140-257-103-155 | 140-257-103-155 | 210-275-103-155 | ||||
| 4P | 185-257-103-155 | 185-257-103-155 | 280-275-103-155 | ||||
| Weight (kg) | 3P | 5.5 | 5.7 | 9.5 | |||
| 4P | 7 | 7.5 | 12.5 | ||||
| Electric operating device (MD) |
● | ||||||
| External driving operating handle |
● | ||||||
| Automatic release | Thermal electromagnetic type | ||||||
| Reference No. | Specification |
| EKM8T-125S-3-025 | Thermal-magnetic TA type MCCB 3P 20-25A ICU/ICS:18/15KA |
| EKM8T-125S-3-032 | Thermal-magnetic TA type MCCB 3P 25.6-32A ICU/ICS:18/15KA |
| EKM8T-125S-3-040 | Thermal-magnetic TA type MCCB 3P 32-40A ICU/ICS:18/15KA |
| EKM8T-125S-3-050 | Thermal-magnetic TA type MCCB 3P 40-50A ICU/ICS:18/15KA |
| EKM8T-125S-3-063 | Thermal-magnetic TA type MCCB 3P 50.4-63A ICU/ICS:18/15KA |
| EKM8T-125S-3-080 | Thermal-magnetic TA type MCCB 3P 64-80A ICU/ICS:18/15KA |
| EKM8T-125S-3-100 | Thermal-magnetic TA type MCCB 3P 80-100A ICU/ICS:18/15KA |
| EKM8T-125S-3-125 | Thermal-magnetic TA type MCCB 3P 100-125A ICU/ICS:18/15KA |
| EKM8T-125S-4-025 | Thermal-magnetic TA type MCCB 4P 20-25A ICU/ICS:18/15KA |
| EKM8T-125S-4-032 | Thermal-magnetic TA type MCCB 4P 25.6-32A ICU/ICS:18/15KA |
| EKM8T-125S-4-040 | Thermal-magnetic TA type MCCB 4P 32-40A ICU/ICS:18/15KA |
| EKM8T-125S-4-050 | Thermal-magnetic TA type MCCB 4P 40-50A ICU/ICS:18/15KA |
| EKM8T-125S-4-063 | Thermal-magnetic TA type MCCB 4P 50.4-63A ICU/ICS:18/15KA |
| EKM8T-125S-4-080 | Thermal-magnetic TA type MCCB 4P 64-80A ICU/ICS:18/15KA |
| EKM8T-125S-4-100 | Thermal-magnetic TA type MCCB 4P 80-100A ICU/ICS:18/15KA |
| EKM8T-125S-4-125 | Thermal-magnetic TA type MCCB 4P 100-125A ICU/ICS:18/15KA |
| EKM8T-160S-3-025 | Thermal-magnetic TMA type MCCB 3P 20-25A ICU/ICS:25/18KA |
| EKM8T-160S-3-032 | Thermal-magnetic TMA type MCCB 3P 25.6-32A ICU/ICS:25/18KA |
| EKM8T-160S-3-040 | Thermal-magnetic TMA type MCCB 3P 32-40A ICU/ICS:25/18KA |
| EKM8T-160S-3-050 | Thermal-magnetic TMA type MCCB 3P 40-50A ICU/ICS:25/18KA |
| EKM8T-160S-3-063 | Thermal-magnetic TMA type MCCB 3P 50.4-63A ICU/ICS:25/18KA |
| EKM8T-160S-3-080 | Thermal-magnetic TMA type MCCB 3P 64-80A ICU/ICS:25/18KA |
| EKM8T-160S-3-100 | Thermal-magnetic TMA type MCCB 3P 80-100A ICU/ICS:25/18KA |
| EKM8T-160S-3-125 | Thermal-magnetic TMA type MCCB 3P 100-125A ICU/ICS:25/18KA |
| EKM8T-160S-3-160 | Thermal-magnetic TMA type MCCB 3P 128-160A ICU/ICS:25/18KA |
| EKM8T-160S-4-025 | Thermal-magnetic TMA type MCCB 4P 20-25A ICU/ICS:25/18KA |
| EKM8T-160S-4-032 | Thermal-magnetic TMA type MCCB 4P 25.6-32A ICU/ICS:25/18KA |
| EKM8T-160S-4-040 | Thermal-magnetic TMA type MCCB 4P 32-40A ICU/ICS:25/18KA |
| EKM8T-160S-4-050 | Thermal-magnetic TMA type MCCB 4P 40-50A ICU/ICS:25/18KA |
| EKM8T-160S-4-063 | Thermal-magnetic TMA type MCCB 4P 50.4-63A ICU/ICS:25/18KA |
| EKM8T-160S-4-080 | Thermal-magnetic TMA type MCCB 4P 64-80A ICU/ICS:25/18KA |
| EKM8T-160S-4-100 | Thermal-magnetic TMA type MCCB 4P 80-100A ICU/ICS:25/18KA |
| EKM8T-160S-4-125 | Thermal-magnetic TMA type MCCB 4P 100-125A ICU/ICS:25/18KA |
| EKM8T-160S-4-160 | Thermal-magnetic TMA type MCCB 4P 128-160A ICU/ICS:25/18KA |
| EKM8T-160H-3-025 | Thermal-magnetic TMA type MCCB 3P 20-25A ICU/ICS:35/25KA |
| EKM8T-160H-3-032 | Thermal-magnetic TMA type MCCB 3P 25.6-32A ICU/ICS:35/25KA |
| EKM8T-160H-3-040 | Thermal-magnetic TMA type MCCB 3P 32-40A ICU/ICS:35/25KA |
| EKM8T-160H-3-050 | Thermal-magnetic TMA type MCCB 3P 40-50A ICU/ICS:35/25KA |
| EKM8T-160H-3-063 | Thermal-magnetic TMA type MCCB 3P 50.4-63A ICU/ICS:35/25KA |
| EKM8T-160H-3-080 | Thermal-magnetic TMA type MCCB 3P 64-80A ICU/ICS:35/25KA |
| EKM8T-160H-3-100 | Thermal-magnetic TMA type MCCB 3P 80-100A ICU/ICS:35/25KA |
| EKM8T-160H-3-125 | Thermal-magnetic TMA type MCCB 3P 100-125A ICU/ICS:35/25KA |
| EKM8T-160H-3-160 | Thermal-magnetic TMA type MCCB 3P 128-160A ICU/ICS:35/25KA |
| EKM8T-160H-4-025 | Thermal-magnetic TMA type MCCB 4P 20-25A ICU/ICS:35/25KA |
| EKM8T-160H-4-032 | Thermal-magnetic TMA type MCCB 4P 25.6-32A ICU/ICS:35/25KA |
| EKM8T-160H-4-040 | Thermal-magnetic TMA type MCCB 4P 32-40A ICU/ICS:35/25KA |
| EKM8T-160H-4-050 | Thermal-magnetic TMA type MCCB 4P 40-50A ICU/ICS:35/25KA |
| EKM8T-160H-4-063 | Thermal-magnetic TMA type MCCB 4P 50.4-63A ICU/ICS:35/25KA |
| EKM8T-160H-4-080 | Thermal-magnetic TMA type MCCB 4P 64-80A ICU/ICS:35/25KA |
| EKM8T-160H-4-100 | Thermal-magnetic TMA type MCCB 4P 80-100A ICU/ICS:35/25KA |
| EKM8T-160H-4-125 | Thermal-magnetic TMA type MCCB 4P 100-125A ICU/ICS:35/25KA |
| EKM8T-160H-4-160 | Thermal-magnetic TMA type MCCB 4P 128-160A ICU/ICS:35/25KA |
| EKM8T-250S-3-125 | Thermal-magnetic TMA type MCCB 3P 100-125A ICU/ICS:25/18KA |
| EKM8T-250S-3-160 | Thermal-magnetic TMA type MCCB 3P 128-160A ICU/ICS:25/18KA |
| EKM8T-250S-3-200 | Thermal-magnetic TMA type MCCB 3P 160-200A ICU/ICS:25/18KA |
| EKM8T-250S-3-250 | Thermal-magnetic TMA type MCCB 3P 200-250A ICU/ICS:25/18KA |
| EKM8T-250S-4-125 | Thermal-magnetic TMA type MCCB 4P 100-125A ICU/ICS:25/18KA |
| EKM8T-250S-4-160 | Thermal-magnetic TMA type MCCB 4P 128-160A ICU/ICS:25/18KA |
| EKM8T-250S-4-200 | Thermal-magnetic TMA type MCCB 4P 160-200A ICU/ICS:25/18KA |
| EKM8T-250S-4-250 | Thermal-magnetic TMA type MCCB 4P 200-250A ICU/ICS:25/18KA |
| EKM8T-250H-3-125 | Thermal-magnetic TMA type MCCB 3P 100-125A ICU/ICS:35/25KA |
| EKM8T-250H-3-160 | Thermal-magnetic TMA type MCCB 3P 128-160A ICU/ICS:35/25KA |
| EKM8T-250H-3-200 | Thermal-magnetic TMA type MCCB 3P 160-200A ICU/ICS:35/25KA |
| EKM8T-250H-3-250 | Thermal-magnetic TMA type MCCB 3P 200-250A ICU/ICS:35/25KA |
| EKM8T-250H-4-125 | Thermal-magnetic TMA type MCCB 4P 100-125A ICU/ICS:35/25KA |
| EKM8T-250H-4-160 | Thermal-magnetic TMA type MCCB 4P 128-160A ICU/ICS:35/25KA |
| EKM8T-250H-4-200 | Thermal-magnetic TMA type MCCB 4P 160-200A ICU/ICS:35/25KA |
| EKM8T-250H-4-250 | Thermal-magnetic TMA type MCCB 4P 200-250A ICU/ICS:35/25KA |
| EKM8T-400H-3-250 | Thermal-magnetic TMA type MCCB 3P 200-250A ICU/ICS:50/35KA |
| EKM8T-400H-3-320 | Thermal-magnetic TMA type MCCB 3P 256-320A ICU/ICS:50/35KA |
| EKM8T-400H-3-400 | Thermal-magnetic TMA type MCCB 3P 320-400A ICU/ICS:50/35KA |
| EKM8T-400H-4-250 | Thermal-magnetic TMA type MCCB 4P 200-250A ICU/ICS:50/35KA |
| EKM8T-400H-4-320 | Thermal-magnetic TMA type MCCB 4P 256-320A ICU/ICS:50/35KA |
| EKM8T-400H-4-400 | Thermal-magnetic TMA type MCCB 4P 320-400A ICU/ICS:50/35KA |
| EKM8T-630H-3-500 | Thermal-magnetic TMA type MCCB 3P 400-500A ICU/ICS:50/35KA |
| EKM8T-630H-3-630 | Thermal-magnetic TMA type MCCB 3P 504-630A ICU/ICS:50/35KA |
| EKM8T-630H-4-500 | Thermal-magnetic TMA type MCCB 4P 400-500A ICU/ICS:50/35KA |
| EKM8T-630H-4-630 | Thermal-magnetic TMA type MCCB 4P 504-630A ICU/ICS:50/35KA |
| EKM8T-800H-3-630 | Thermal-magnetic TMA type MCCB 3P 504-630A ICU/ICS:65/50KA |
| EKM8T-800H-3-800 | Thermal-magnetic TMA type MCCB 3P 640-800A ICU/ICS:65/50KA |
| EKM8T-800H-4-630 | Thermal-magnetic TMA type MCCB 4P 504-630A ICU/ICS:65/50KA |
| EKM8T-800H-4-800 | Thermal-magnetic TMA type MCCB 4P 640-800A ICU/ICS:65/50KA |
