Claire
Mr.Fu
Claire
SJKM3E Electronic Circuit Breaker (ECB) - Smart Protection for 16A-800A Loads | China Suppliers & Factory
Type Designation
| ① | Product Type |
| ② | Molded Case Circuit Breaker (MCCB) Designation |
| ③ | Design Code |
| ④ | Release Type |
| ⑤ | Frame Current Rating (A) |
| ⑥ | Breaking Capacity Class |
| ⑦ | Operation Mode |
| ⑧ | Number of Poles |
| ⑨ | Accessory Code |
Release Mechanism Type and Internal Accessory Code
♦ Release Characteristics
With protection functions including overload long-time inverse time delay, short-circuit time delay inverse limit, short-circuit short-time delay fixed time limit, and short-circuit instantaneous action, users can set the required protection characteristics themselves. The neutral line overcurrent protection current and time parameters automatically track 100% of the phase line setting values. The release characteristics are shown in the following diagram.
With protection functions including overload long-time inverse time delay, short-circuit time delay inverse limit, short-circuit short-time delay fixed time limit, and short-circuit instantaneous action, users can set the required protection characteristics themselves. The neutral line overcurrent protection current and time parameters automatically track 100% of the phase line setting values. The release characteristics are shown in the following diagram.
- 🔲 Alarm Contact (NC)
- ■ Auxiliary Contact (NO+NC)
- ● Shunt Release
- ○ Undervoltage Release
- → Wiring Direction
Product Display
SJKM3E Series Front Panel Wiring
SJKM3E-125 (L,M,H) Front Panel Wiring (2-pole, 3-pole, 4-pole) — X-X, Y-Y are the centers of 3-pole circuit breaker
SJKM3E-125 (L,M,H) Insert Type Front Panel Wiring (3-pole) — X-X, Y-Y are the centers of 3-pole circuit breaker
SJKM3E-250 (L,M,H) Front Panel Wiring (3-pole, 4-pole) — X-X, Y-Y are the centers of 3-pole circuit breaker
SJKM3E-250 (L,M,H) Insert Type Front Panel Wiring (3-pole) — X-X, Y-Y are the centers of 3-pole circuit breaker
SJKM3E-400 (L,M,H) Front Panel Wiring (3-pole, 4-pole) — X-X, Y-Y are the centers of 3-pole circuit breaker
SJKM3E-400 (L,M,H) Insert Type Front Panel Wiring (3-pole) — X-X, Y-Y are the centers of 3-pole circuit breaker
SJKM3E-630,800 (L,M,H) Front Panel Wiring (3-pole, 4-pole) — X-X, Y-Y are the centers of 3-pole circuit breaker
SJKM3E-630,800 (L,M,H) Insert Type Front Panel Wiring (3-pole) — X-X, Y-Y are the centers of 3-pole circuit breaker
Frequently Asked Questions
What does the SJKM3E type designation code represent?
The SJKM3E type designation is a structured code that identifies key product attributes including: product type, MCCB designation, design code, release type, frame current rating (A), breaking capacity class, operation mode, number of poles, and accessory code. Each character or symbol in the designation corresponds to one of these nine parameters.
What protection functions does the SJKM3E release mechanism provide?
The SJKM3E release mechanism offers four main protection functions: overload long-time inverse time delay, short-circuit time delay inverse limit, short-circuit short-time delay fixed time limit, and short-circuit instantaneous action. Users can configure the required protection characteristics according to their specific application needs.
How does the neutral line protection work on the SJKM3E?
The neutral line overcurrent protection on the SJKM3E automatically tracks 100% of the phase line setting values. This means the current and time parameters for neutral line protection are always synchronized with the phase line settings, ensuring consistent and reliable protection without requiring separate manual adjustment.
What internal accessories are available for the SJKM3E circuit breaker?
The SJKM3E supports several internal accessories, including an Alarm Contact (NC), Auxiliary Contact (NO+NC), Shunt Release, and Undervoltage Release. These accessories expand the functionality of the breaker for monitoring, remote tripping, and voltage protection applications.
What frame current ratings and pole configurations are available for the SJKM3E series?
The SJKM3E series covers a wide range of frame current ratings including 125A, 250A, 400A, 630A, and 800A. Each frame size is available in multiple breaking capacity classes (L, M, H) and supports 2-pole, 3-pole, and 4-pole configurations to suit various installation requirements.
What is the difference between standard front panel wiring and insert type front panel wiring on the SJKM3E?
Standard front panel wiring on the SJKM3E is designed for fixed-mounted installations and supports 2-pole, 3-pole, and 4-pole configurations. Insert type front panel wiring is specifically designed for drawout (plug-in) installations and is available in 3-pole configuration. The wiring diagrams show the terminal layout with X-X and Y-Y reference lines indicating the centers of the 3-pole circuit breaker.