Wholesale SJKM3L ELCB Earth Leakage Circuit Breaker with High Sensitivity Suppliers, Supplier
Wholesale SJKM3L ELCB Earth Leakage Circuit Breaker with High Sensitivity Suppliers, Supplier
Wholesale SJKM3L ELCB Earth Leakage Circuit Breaker with High Sensitivity Suppliers, Supplier
Wholesale SJKM3L ELCB Earth Leakage Circuit Breaker with High Sensitivity Suppliers, Supplier
Wholesale SJKM3L ELCB Earth Leakage Circuit Breaker with High Sensitivity Suppliers, Supplier
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Wholesale SJKM3L ELCB Earth Leakage Circuit Breaker with High Sensitivity Suppliers, Supplier
Wholesale SJKM3L ELCB Earth Leakage Circuit Breaker with High Sensitivity Suppliers, Supplier
Wholesale SJKM3L ELCB Earth Leakage Circuit Breaker with High Sensitivity Suppliers, Supplier
Wholesale SJKM3L ELCB Earth Leakage Circuit Breaker with High Sensitivity Suppliers, Supplier
Wholesale SJKM3L ELCB Earth Leakage Circuit Breaker with High Sensitivity Suppliers, Supplier

Wholesale SJKM3L ELCB Earth Leakage Circuit Breaker with High Sensitivity Suppliers, Supplier

The SJKM3L ELCB Earth Leakage Circuit Breaker provides advanced protection for 230V/415V AC systems (50/60Hz), with adjustable residual currents (30mA–500mA) and dual trip modes (non-delayed/time-delayed). Available in 125A/160A ratings and 2P/3P/4P configurations, this ELCB features 800V insulation, high-breaking capacity (up to 50kA), and modular accessory compatibility. Compliant with IEC60947-2, it combines thermal-magnetic tripping, isolation functionality, and motor/distribution protection in a compact design. Ideal for industrial/commercial applications, the SJKM3L ELCB ensures reliable ground-fault detection with mechanical endurance up to 40,000 cycles.

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Product Description

Type Designation & Overview

SJKM3L Type Designation
No. Designation & Functional Description
1Technical Parameters
2Mounting Holes
3Product Model
4Breaking Capacity
5Compliance Standards
6Manufacturer Name
7Trip Button
8Certification Mark
9Circuit Breaker with Isolation Function
10Manufacturer Logo
11Rated Current
12Rated Residual Operating Current
13Ultimate Non-operating Time
14Earth Leakage Indicator Button
15Earth Leakage Test Button
16Close, Trip, Open Indicator

Product Display

SJKM3L Earth Leakage Circuit Breaker Angle View
SJKM3L Earth Leakage Circuit Breaker Side View
SJKM3L Earth Leakage Circuit Breaker Detail View
SJKM3L Earth Leakage Circuit Breaker Front Panel
SJKM3L Earth Leakage Circuit Breaker Structure
SJKM3L Earth Leakage Circuit Breaker Overview

Technical Parameters

Specification Items SJKM3L-125 SJKM3L-160
Rated Voltage Ue (V) 230(2P)/400/415 230(2P)/400/415
Rated Current In (A) 16/20/25/32/40/50/63/80/100/125 100/125/140/160
Rated Insulation Voltage Ui (V) 800 800
Rated Impulse Withstand Voltage Uimp (kV) 8 8
Number of Poles 2/3/4(A,B) 2/3/4(A,B)
Rated Residual Operating Current IΔn mA (3-step adjustable) Non-delayed Type 30mA, 100mA, 300mA 30mA, 100mA, 300mA
Non-delayed Type 100mA, 300mA, 500mA 100mA, 300mA, 500mA
Time-delayed Type 100mA, 300mA, 500mA 100mA, 300mA, 500mA
Rated Residual Non-operating Current IΔno mA 50% IΔn 50% IΔn
Non-delayed Type: Tripping Time s ≤ 0.1 ≤ 0.1
Fixed Delay: 2IΔn Ultimate Non-operating Time s (Special Order) 0.1/0.2/0.3/0.4/0.5/1 0.1/0.2/0.3/0.4/0.5/1
Adjustable Delay: Ultimate Non-operating Time at 2IΔn s (Standard) Y1: 0.1/0.2/0.3s Y1: 0.1/0.2/0.3s
Y2: 0.4/0.5/1s Y2: 0.4/0.5/1s
Breaking Capacity Type C (3/4P) S F (3/4P) C (3/4P) S F (3/4P)
Icu(415V) 20 35 50 20 35 50
Ics(415V) 12 21 30 12 21 30
Rated Residual Short-circuit Making Capacity IΔm(kA) 25% Icu 25% Icu 25% Icu 25% Icu
Mechanical Endurance With Maintenance 20000 40000 20000 40000
Maintenance-free 10000 20000 10000 20000
Electrical Endurance at 400V 4000 8000 4000 8000
Modular Accessory Installation ■ ■
Isolation Function ■ ■
Protection Type Distribution Protection Distribution Protection
Motor Protection (Not available for 2P) Motor Protection (Not available for 2P)
Tripping Method Thermal-magnetic Trip ■ ■
Magnetic-only Trip ■ ■
Connection Method
Fixed Front Terminal Connection ■ ■
Fixed Rear Terminal Connection (No 2P) ■ ■
Plug-in Rear Terminal Connection (No 2P) ■ ■
Dimension (mm) 2P 62*150*72 75*165*74
3P 92*150*93.5 107*165*94
4P 122*150*93.5 142*165*94

SJKM3L Series Overcurrent Characteristic Curve Diagram

SJKM1LE-125 and SJKM1LE-250 Time-Current Characteristic Curve

Left: SJKM1LE-125 Time-Current Characteristic Curve (Motor)
Right: SJKM1LE-250 Time-Current Characteristic Curve (Motor)

SJKM1LE-400 and SJKM1LE-630,800 Time-Current Characteristic Curve

Left: SJKM1LE-400 Time-Current Characteristic Curve (Motor)
Right: SJKM1LE-630, 800 Time-Current Characteristic Curve (Motor)

Operating Principle Diagram

SJKM3L Operating Principle Diagram

SJKM3L Series Plug-in Front/Rear Panel Hole Position Diagram

SJKM3L Hole Position Diagram
Frame Poles A A1 B B1 C D
Plug-in Front Connection 125 3 / 30 / 110 / 5
4
160/250 3 / 35 / 150 / 5
4
Plug-in Rear Connection 125 3 94 60 40 67 90 5.5
4 124 90
160/250 3 110 70 45 74 100 6.5
4 145 105
400 3 157 88 60 145 170 8.5
4 205 132
630 3 212 140 62 143 185 11
4 282 210

Frequently Asked Questions (FAQ)

QWhat applications is the SJKM3L series circuit breaker designed for?

The SJKM3L series is engineered for power distribution systems and electric motor protection, offering comprehensive earth leakage, short circuit, and overload protection.

QWhat are the available residual operating current ratings?

The unit offers adjustable ratings across multiple levels including 30mA, 100mA, 300mA, and up to 500mA in non-delayed and time-delayed configurations to meet diverse system requirements.

QDoes the SJKM3L support both AC 230V and 400V/415V systems?

Yes, the device supports rated operational voltages of 230V for 2-pole configurations and 400V/415V for 3-pole and 4-pole network distribution setups.

QWhat connection and mounting options are available?

It supports fixed front terminal connections, fixed rear terminal connections, and plug-in rear connections across varied frame ratings.

QHow does the isolation function benefit system maintenance?

Equipped with a certified circuit isolation feature, the breaker ensures physical circuit separation during maintenance to protect operating personnel and downstream machinery.

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