ETM1 Series Molded Case Circuit Breaker
The ETM1 series molded case circuit breakers (hereinafter referred to as “circuit breakers”) are one of the new types of circuit breakers developed by our company using internationally advanced design and manufacturing technologies. With a rated insulation voltage of 1000 V, these circuit breakers are suitable for circuits operating at 50 Hz AC, with a rated operating voltage of 690 V or less (250 V DC or less), and a rated operating current ranging from 10 A to 1250 A. They are designed for infrequent switching and infrequent motor starting. The circuit breakers are equipped with overload, short-circuit, and undervoltage protection devices, ensuring that both the circuit and power supply equipment are protected from damage.
Scope of Application
The ETM1 series molded case circuit breakers (hereinafter referred to as “circuit breakers”) are one of the new types of circuit breakers developed by our company using internationally advanced design and manufacturing technologies. With a rated insulation voltage of 1000 V, these circuit breakers are suitable for circuits operating at 50 Hz AC, with a rated operating voltage of 690 V or less (250 V DC or less), and a rated operating current ranging from 10 A to 1250 A. They are designed for infrequent switching and infrequent motor starting. The circuit breakers are equipped with overload, short-circuit, and undervoltage protection devices, ensuring that both the circuit and power supply equipment are protected from damage.
Applicable Standards
IEC 60947-2 GB/T 14048.2
Note: When placing an order, customers must clearly specify the circuit breaker model, specifications, and included accessories. When using undervoltage trip
For example:
- To order an ETM1-125M three-pole circuit breaker for power distribution with a rated current of 50A, “0” arc suppression, a manual operating mechanism, a shunt trip unit (AC380V), auxiliary contacts, alarm contacts, and 20 rear-panel terminals:
Write: Order ETM1-125MZ/3348, In=50A, “0” arc, shunt trip unit AC380V, rear panel wiring, 20 units.
Model and meaning
| ETM1 | 125 | L | P |
| Product name | Frame Grade | Breaking Capacity Code | Operation Mode Code |
| ETM1 Series Molded Case Circuit Breakers |
63 125 250 400 630 800 1250 |
L: Standard M: Medium H: High-break |
Direct joystick control (no code) P: Electric control Z: Joystick control |
| 3 | 3 | 10 | 2 | 100 |
| Poles | Name of the trip device | Attachment Code | Purpose Code | Rated current |
| 2P 3P 4P |
2: Electromagnetic trip unit 3: Double-pole trip unit 0: No protection (For isolation only) |
Attachment Code | Circuit breakers for power distribution have no code; Circuit breakers for motor protection are designated by the number 2. | 10A~1250A |
Main Technical Speciffcations
| Model | ETM1-63 | ETM1-125 | ETM1-250 | ETM1-400 | ETM1-630 | ETM1-800 | ETM1-1250 | ||||||||||||||
| Poles | 3 | 4 | 2 | 3 | 4 | 2 | 3 | 4 | 3 | 4 | 3 | 4 | 3 | 4 | 3 | 4 | |||||
| Rated current In(A) | 10 16 20 25 32 40 50 63 |
10 16 20 25 32 40 50 63 80 100 125 | 100 125 160 180 200 225 250 | 200 225 250 315 350 400 | 400 500 630 | 630 700 800 | 800 1000 1250 | ||||||||||||||
| Rated insulation voltage Ui (V) | 800 | 1000 | |||||||||||||||||||
| Rated impulse withstand voltage Uimp (kV) | 8 | 12 | |||||||||||||||||||
| Rated operating voltage Ue (V) | 400 | 400/690 | |||||||||||||||||||
| Breaking Capacity Rating | L | M | L | M | H | L | M | H | L | M | H | L | M | H | L | M | H | L | M | H | |
| Maximum short-circuit breaking capacity | 440V | 25 | 50 | 35 | 50 | 85 | 35 | 50 | 85 | 50 | 50 | 100 | 50 | 50 | 100 | 50 | 65 | 85 | 50 | 65 | 85 |
| 690V | 10 | ||||||||||||||||||||
| Short-circuit breaking capacity | 440V | 18 | 35 | 25 | 35 | 65 | 25 | 35 | 65 | 35 | 50 | 75 | 35 | 50 | 75 | 35 | 50 | 65 | 35 | 50 | 65 |
| 690V | 5 | 10 | |||||||||||||||||||
| Arc length (mm) | 50 | 100 | |||||||||||||||||||
| Number of operation cycles | Per hour | 120 | 60 | 20 | |||||||||||||||||
| Powered | 7000 | ||||||||||||||||||||
| Powered | 10000 | ||||||||||||||||||||
| Dimensions (mm) | Lenth L | 135 | 150 | 165 | 257 | 270 | 280 | 406 | |||||||||||||
| Width W | 76 | 103 | 65 | 92 | 122 | 75 | 107 | 142 | 150 | 184 | 180 | 240 | 210 | 280 | 210 | 280 | |||||
| Highth H | 91 | 98.5 | 86 | 104 | 110 | 127 | 155 | 160 | 171 | 193 | |||||||||||
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