Eaton Plastic Case Circuit Breaker Technology Analysis and Application Guide

3.2 Operating mechanism and locking device

Rotating handle: direct, variable depth, metal variable depth, suitable for different cabinet depths, with padlock function.

Flexible shaft handle: capable of remote operation between circuit breakers and doors, with a maximum length of 10 feet.

Interlocking device: including sliding rod interlocking and rocker arm interlocking, used for mechanical interlocking between two circuit breakers to prevent simultaneous closing.

Padlock device: The handle can be locked in the ON or OFF position to meet the safety padlock requirements.

3.3 Special Environmental Applications

High temperature environment: Thermal magnetic circuit breakers need to be used with reduced capacity above 40 ° C. Electronic release devices are not sensitive to ambient temperature, but they will trip automatically when the internal overheating occurs.

High altitude: For every distance exceeding 1000m (>2000m), the voltage/breaking capacity needs to be reduced by 2.5%, and the ambient temperature should be adjusted according to 3 ° C/1000m.

400Hz application: Due to skin effect, reduced capacity is required for use, and the cable cross-section needs to be increased compared to 60Hz.

Chapter 4 Selection and Key Points of Engineering Application

4.1 Protection Function Selection

Thermomagnetic release: suitable for simple loads, low cost, but accuracy is affected by environmental temperature.

Electronic release: suitable for complex power distribution systems, with high protection accuracy, multiple adjustable parameters, and support for communication.

LSI: Long delay+Short delay+Instantaneous, suitable for feeder protection.

LSIG: Add ground fault protection, suitable for places sensitive to ground leakage (such as medical and data centers).

4.2 Selection of Rated Values

80% rated: For routine applications, the continuous load of the circuit breaker shall not exceed 80% of the rated value.

100% rated: requires the use of 90 ° C cables and reduced capacity to 75 ° C for use, and installed in the specified minimum size cabinet.

4.3 Selective Coordination

By utilizing the ZSI (Zone Selective Interlocking) function, it is possible to achieve rapid isolation of upstream and downstream circuit breakers in the event of a fault, while ensuring continuous power supply to non fault areas. The Power Defense PXR 20/25 supports ZSI and indicates interlock status through the front panel LED.

Power Defense series circuit breaker models

1. PD-1 framework (15-125 A)

Model Description

PDG13M0003MSAJ MCP 3A

PDG13M0007MSAJ MCP 7A

PDG13M0015MSAJ MCP 15A

PDG13M0030MSAJ MCP 30A

PDG13M0050MSAJ MCP 50A

PDG13M0070MSAJ MCP 70A

PDG13M0100MSAJ MCP 100A

PDG13M0100MHAJ MCP 100A (high setting)

2. PD-2 framework (15-225 A)

Model Description

PDG23M0003MSAJ MCP 3A

PDG23M0007MSAJ MCP 7A

PDG23M0015MSAJ MCP 15A

PDG23M0030MSAJ MCP 30A

PDG23M0050MSAJ MCP 50A

PDG23M0100MSAJ MCP 100A

PDG23M0150MSAJ MCP 150A

PDG23M0150MHAJ MCP 150A (high setting)

3. PD-3 framework (45-600 A)

Model Description

PDG33M0070MSAJ MCP 70A (400A frame)

PDG33M0100MSAJ MCP 100A (400A framework)

PDG33M0125MSAJ MCP 125A (400A framework)

PDG33M0150MSAJ MCP 150A (400A framework)

PDG33M020MSAJ MCP 200A (400A framework)

PDG33M0225MSAJ MCP 225A (400A framework)

PDG33M0250MSAJ MCP 250A (400A framework)

PDG33M0300MSAJ MCP 300A (400A framework)

PDG33M0350MSAJ MCP 350A (400A framework)

PDG33M0400MSAJ MCP 400A (400A framework)

PDG33M0400MHAJ MCP 400A (high setting)

PDG33MH250MSAJ MCP 250A (600A framework)

PDG33MH300MSAJ MCP 300A (600A framework)

PDG33MH350MSAJ MCP 350A (600A framework)

PDG33MH400MSAJ MCP 400A (600A framework)

PDG33M0450MSAJ MCP 450A (600A framework)

PDG33M0500MSAJ MCP 500A (600A framework)

PDG33M0600MSAJ MCP 600A (600A framework)

4. Grounding fault module (30 mA)

Model Description

ELEBN3125G PD1 3P UL Grounding Fault Module

ELEBN4125G PD1 4P UL Grounding Fault Module

ELEBE3125G PD1 3P IEC leakage module

ELEBE4125G PD1 4P IEC leakage module

PDGXRCD3P225 PD2 3P UL grounding fault module 225A

PDGZXRCD4P225 PD2 4P UL Ground Fault Module 225A

PDG3XRCD3P400 PD3 3P UL grounding fault module 400A

PDG3XRCD4P400 PD3 4P UL Ground Fault Module 400A

PDG3XRCD3P600 PD3 3P UL grounding fault module 600A

PDG3XRCD4P600 PD3 4P UL Grounding Fault Module 600A

PDE3XRC3P630 PD3 3P IEC leakage module 630A

PDE3XRCD4P630 PD3 4P IEC leakage module 630A

PDC3XRC3P630 PD3 3P IEC/CC leakage module 630A

PDC3XRCD4P630 PD3 4P IEC/CC leakage module 630A

5. Current limiting module

Model Description

EGC3015FFGQ01 EG frame line side current limiting module

EGC3015FFGQ02 EG frame load side current limiting module

JGH3070FAGQ01 JG Frame Line Side Current Limiting Module

JGH3070FAGQ02 JG frame load side current limiting module

HMCPJ250D5LH01 HMCP 250A line side current limiting module

HMCPJ250D5LK02 HMCP 250A load side current limiting module

6. High instantaneous selective coordinated circuit breaker

Model Description

LHH3125FFG LHH 125A Thermomagnetic

LHH3150FFG LHH 150A Thermomagnetic

LHH3175FFG LHH 175A Thermomagnetic

LHH3200FFG LHH 200A Thermomagnetic

LHH3225FFG LHH 225A Thermomagnetic

LHH3250FFG LHH 250A Thermomagnetic

LHH3300FFG LHH 300A Thermomagnetic

LHH3350FFG LHH 350A Thermomagnetic

LHH3400FFG LHH 400A Thermomagnetic