Molded Case Circuit Breaker

JHM1L Molded Case Circuit Breaker, developed by China-based manufacturer Jinhand Electrical, is designed for AC 50Hz, 400V circuits with current ratings up to 800A. This factory-supplied breaker provides overload, short-circuit, undervoltage, and ground-fault protection, suitable for infrequent switching, motor starting, and fire risk prevention in power distribution systems.

Advantages

1.Enhanced Safety: Provides protection against persistent ground faults, reducing fire risks that may not be detected by standard overcurrent protection.
2.Comprehensive Protection: Offers overload, short-circuit, and under-voltage protection, ensuring the safety of electrical lines and equipment.
3.Reliable Performance: Designed for infrequent switching and motor starting applications, making it suitable for various operational needs.

MAIN TECHNICAL PARAMETERS

Project

JHM1-63

JHM1-125

JHM1-250

JHM1-400

JHM1-630

Frame Current Inm(A)

125

250

400

630

800

Rated Current In(A)

10/16/20/25/32/40/50/63/ 80/100/125

100/125/140/160/180/200/225/250

225/250/315/350/400

400/500/630

630/700/800

Number of Poles

3/4

3/4

3/4

3/4

3/4

Rated Operational Voltage Ue(V)

AC800

Rated Insulation Voltage Ui(V)

AC400

AC400

AC400

AC400

AC400

Rated Impulse Withstand Voltage Uimp(V)

8000

8000

8000

8000

8000

Arcing Distance(mm)

≤50

≤50

≤50

≤50

≤50

Breaking Capacity Level

L

M

L

M

L

M

L

M

H

L

M

H

Ultimate Short-Circuit Breaking Capacity lcu(kA)

AC400V

50

85

50

85

50

65

100

50

65

100

50

65

100

Service Short-Circuit Breaking Capacity lcs(kA)

AC400V

35

50

35

10

35

42

65

35

42

65

35

42

65

Rated Residual Operating Current Non-Delayed Type I△n(mA)

Non-delayed type

100/300/500

Delayed type

100/300/500

300/500/1000

Rated Residual Non-Operating Current I△n(mA)

1/2I△n

1/21△n

1/2I△n

1/21△n

1/21△n

Rated Residual Short-Circuit Making(Breaking)Capacity I△m(mA)

25%lcu

25%lcu

25%lcu

25%lcu

25%lcu

Operating Performance(cycles)

Energized/Power On

1500

1000

1000

1000

1000

De-energized/Power Off

8500

7000

4000

4000

4000

W

92

121

107

141

150

198

210

280

210

280

L

150

150

165

165

257

257

282

282

282

282

H

92

92

90

90

105

105

110

110

110

110

Shunt Trip

O

O

O

O

O

Undervoltage Release

O

O

O

O

O

Residual Current Alarm Module

O

O

O

O

O

Auxiliary Contact

O

O

O

O

O

Alarm Contact

O

O

O

O

O

Motorized Operating Mechanism

O

O

O

O

O

Rotary Handle Operating Mechanism

O

O

O

O

O

Main Features

1.Rated Specifications: Suitable for AC 50Hz circuits with a rated insulation voltage of 800V, operational voltage up to 400V, and rated operational currents up to 800A.
2.Versatile Application: Ideal for applications requiring infrequent switching, making it adaptable for different industrial and commercial environments.
3.Protection Against Fire Hazards: Specifically designed to detect ground faults that could lead to dangerous fire situations, enhancing overall safety.

Product Highlights

1.Integrated Residual Current Protection：Combines overload, short-circuit, undervoltage, and earth fault protection in one unit, suitable for personal safety and fire prevention.
2.Wide Current Range Coverage：Rated current from 10A to 800A, meeting diverse needs from residential distribution to industrial applications.
3.High Breaking Capacity with Selectable Levels：Offers L/M/H three-level breaking capacities (up to 100 kA/400V), adaptable to different short-circuit risk scenarios.
4.Multiple Earth Leakage Protection Modes：Supports instantaneous and time-delayed residual current protection, with adjustable rated residual operating current from 100 mA to 1000 mA.

Operational Cost Optimization

1.Smart Self-Test Function for Earth Leakage:Supports periodic self-testing and manual testing to ensure residual current protection remains effective.
2.Modular Accessory Configuration:Auxiliary contacts, alarm modules, shunt trips, etc., feature plug-and-play design for easy maintenance and replacement.
3.Long Electrical and Mechanical Life:Electrical life up to 8,500 operations, stable mechanical life, reducing overall replacement costs.
4.Status Indication and Alarm Output:Includes ON/OFF/fault/leakage status indication and supports remote alarm signal output.

Logistics & Installation

1.Standard Industrial Packaging:Shock and moisture-resistant with clear labeling, suitable for pallet or container shipping, compatible with global logistics.
2.Flexible Installation Methods:Supports DIN rail mounting and front-panel fixed installation, with mounting templates and torque guidelines provided.
3.Plug-and-Play Design:standardized accessory interfaces allow functional expansion on-site without special tools.
4.Multilingual Technical Support:Provides installation guides, wiring diagrams, and parameter tables in Chinese and English for quick deployment in overseas projects.

Service Support

1.Free Selection and Technical Support：Provides online selection tools and technical consultation to assist customers with proper configuration.
2.Installation and Commissioning Training：Offers product installation videos, commissioning guides, and on-site training services.
3.Fault Diagnosis and Repair Support：Provides remote fault diagnosis and on-site repair services with rapid response.

Customer Feedback

1."Selected the JHM1L series for multiple commercial complex power distribution systems. Accurate earth leakage protection, stable operation, significantly improving electrical safety."
2."High cost-performance ratio, comprehensive functions, especially suitable for overseas engineering projects with strict requirements for personal safety and fire prevention."

Contact us

Over a decade of innovation-driven expansion has made Jinhand one of China’s leading manufacturers and suppliers of electrical equipment. Our factory has embraced a wide range of advanced technologies and machinery, and we invite you to purchase our high-quality, reasonably priced products made in China.