Product specifications for intelligent DC metering and control equipment

Product Range: Low-voltage series of surge protection boards and DC power distribution devices.

Core Function: Offers surge suppression, signal filtering and full power safety protection.

Multi-Protection: Integrates overvoltage, overcurrent, overheat and reverse connection protection.

High Stability: Fast response, low residual voltage, flame-retardant and anti-aging.

Simple Mounting: Modular design, compatible with DIN rail and 19-inch cabinets.

Wide Usage: Applicable for power, communication, transportation and building systems.

Standard & Custom: Meets IEC standards and supports personalized customization.

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Product Description
Specification
Product Advantage

Product Description

1. General Overview

1.1 Product Scope

This specification covers two core categories of low-voltage electrical equipment for power safety and power distribution:

1. Surge protection circuit boards: AC power surge protection board, DC power surge protection board, signal surge protection board

2. DC power distribution components: High-current power terminal blocks, rack-mounted DC power distribution units

The equipment is designed to improve power safety, suppress lightning surge interference, and realize centralized DC power distribution, applicable to power grid, communication base station, transportation, intelligent building and industrial electronic systems.

1.2 Design Concept

• Safety priority: Suppress instantaneous overvoltage/overcurrent caused by lightning surges

• High efficiency: Low conduction loss, stable power transmission

• Modular structure: Easy installation, replacement and maintenance

• Wide environmental adaptability: Adapt to complex indoor and outdoor working conditions

1.3 Core Application Fields

• Power System: Generator sets, transmission & distribution lines, power distribution cabinets

• Communication Industry: Mobile base stations, signal transmission equipment, communication power cabinets

• Transportation: Vehicle electronic control system, rail transit power supply system

• Construction & Intelligent Building: Building electrical distribution, intelligent monitoring equipment

Specification

2. Technical Specifications for Surge Protection Boards

2.1 Common Mechanical & Structural Parameters

• Carrier substrate: High flame-retardant PCB board

• Surge absorption component: Low residual voltage piezoresistor, high-frequency inductance filter group

• Connection method: Through-hole welding, pluggable modular design

• Protection grade: IP20 (indoor cabinet installation)

• Operating temperature range: -40℃ ~ +80℃

• Storage temperature range: -45℃ ~ +85℃

• Relative humidity: 5% ~ 95% (non-condensing)

• Mounting method: Fixed inside distribution cabinet, can be combined in parallel multi-group

2.2 AC Power Surge Protection Board

1. Rated continuous operating voltage: AC 220V / 380V optional

2. Nominal discharge current (8/20μs surge waveform): 10kA ~ 40kA

3. Maximum discharge current (8/20μs): 20kA ~ 80kA

4. Voltage protection level (residual voltage): ≤1.5kV

5. Response time: ≤25ns

6. Filter function: Built-in LC low-pass filter, suppress high-frequency interference

7. Service life: ≥1000 times surge impact under rated discharge current

2.3 DC Power Surge Protection Board

1. Rated continuous operating voltage: DC 24V / 48V / 110V optional

2. Nominal discharge current (8/20μs): 10kA ~ 30kA

3. Maximum discharge current (8/20μs): 15kA ~ 60kA

4. Common-mode / differential-mode surge withstand: Common mode 4kV, differential mode 2kV (1.2/50μs)

5. Reverse polarity protection: Built-in anti-reverse diode circuit

6. Low voltage drop: ≤0.3V under rated load

2.4 Signal Surge Protection Board

1. Applicable signal types: RS485, Ethernet, control switching signal

2. Rated signal voltage: DC 0~24V

3. Signal insertion loss: ≤0.5dB within working frequency band

4. Surge protection level: 5kA (8/20μs)

5. Bandwidth: Meet standard communication signal transmission requirements without signal distortion

6. Isolation performance: Isolate power surge interference from signal loop

3. Technical Specifications for DC Power Distribution Terminals

3.1 General Structure & Material

• Insulating housing: High-strength flame-retardant PA plastic, anti-aging, anti-creepage

• Conductive contact: T2 copper alloy, silver plating on surface, low contact resistance

• Wiring fastener: High-strength stainless steel bolt, anti-loosening structure

• Visible wiring window: Transparent dust-proof cover for convenient wiring inspection

• Mounting standard: Compatible with 35mm DIN rail standard installation

3.2 Current Series Terminal Block General Parameters

Classified by rated through-current: Small current type, medium current type, large current type

1. Contact resistance: ≤100μΩ under rated current

2. Withstand voltage: AC 2000V / 1min without breakdown

3. Wiring wire range: 2.5mm² ~ 70mm² copper cable (corresponding to different current specifications)

4. Bolt tightening torque: 1.5 ~ 3.0 N·m

5. Short-circuit withstand capacity: Match supporting fuse protection

6. Temperature rise: ≤40K under full rated load

3.3 Small-Current Terminal Module

• Rated working current: ≤60A

• Single-group wiring hole: 2 holes for input, 2 holes for output

• Structure: Split pluggable design, quick disassembly and replacement

3.4 Medium-Current Terminal Module

• Rated working current: 100A ~ 200A

• Double-row conductive copper bar structure, uniform current distribution

• Independent dust-proof transparent cover for each wiring terminal

3.5 Large-Current Terminal Module

• Rated working current: ≥300A

• Thickened integrated copper conductive bar, reduce heat generation

• Large-diameter wiring bolts, adapt thick high-current power cables

4. Technical Specifications for Rack-Mounted DC Power Distribution Unit (DCDU)

4.1 Electrical Performance

1. Rated input voltage: DC -48V (communication standard power supply)

2. Input maximum bearing current: 300A

3. Output channels: Multi-channel independent distribution circuits, configurable quantity

4. Single-channel output protection: Independent miniature circuit breaker for each output loop

5. Overall voltage drop: ≤0.5V DC under full load

6. Surge protection: Built-in integrated DC surge protection circuit, consistent with DC surge protection board standard

4.2 Mechanical & Installation Parameters

• Cabinet specification: 19-inch standard rack-mounted, 1U height

• Housing material: Cold-rolled steel plate with anti-rust electrostatic spraying

• Heat dissipation: Natural air convection heat dissipation, no fan required

• Input terminal: Large-current terminal block matching the above large-current distribution terminal

• Output terminal: Standard small/medium current terminal modules

• Protection grade: IP20, suitable for indoor communication cabinet

4.3 Protection Functions

• Over-current protection: Each loop circuit breaker automatic trip

• Surge overvoltage protection: Integrated DC lightning protection module

• Reverse connection protection: Anti-reverse input circuit

• Over-temperature protection: Automatic power-off under abnormal high temperature

5. Universal Environmental & Reliability Standards

5.1 Vibration & Shock Resistance

• Vibration test: 10~150Hz frequency sweep, amplitude 0.35mm, continuous vibration 2h without loose parts

• Shock test: 15g acceleration, 11ms pulse, no electrical contact failure

5.2 Flame Retardancy

All insulating plastic and PCB materials reach V-0 flame retardant grade under UL94 standard

5.3 Aging Resistance

• High temperature aging: 70℃ continuous operation 1000h, electrical performance attenuation ≤5%

• Damp heat aging: 40℃, 93%RH, continuous 500h without insulation failure

5.4 Safety Compliance Reference

Designed and tested in accordance with IEC 61643 (surge protection devices), IEC 60947 (low voltage terminals), IEC 62368-1 (electronic equipment safety) standards.

6. Installation & Operation Requirements

1. All equipment shall be installed in closed power distribution cabinets to avoid direct rain and sunlight exposure

2. Surge protection products must be reliably grounded; grounding wire cross-section ≥4mm² copper wire

3. High-current terminals shall regularly check bolt tightness to prevent overheating caused by loose wiring

4. The surge protection board shall be replaced in time after multiple lightning surge impacts

5. DCDU rack equipment shall reserve sufficient heat dissipation space up and down the cabinet

7. After-Sales & Technical Support General Terms

1. Complete product technical drawing, wiring diagram and installation instruction documents provided

2. Support customized circuit parameters, current specifications and structural dimensions according to project requirements

3. On-site technical guidance for installation, commissioning and fault troubleshooting available

4. Long-term supply of spare replacement modules for all series equipment

Product Advantage

1

Full Protection: Integrates surge, overvoltage, overcurrent, overheat and reverse polarity protection.
2

Stable Performance: Fast response, low residual voltage and low power consumption.
3

High Durability: V-0 flame-retardant, anti-aging and anti-vibration for long service life.
4

Easy Mounting: Modular structure for fast DIN rail and 19-inch cabinet installation.
5

Wide Application: Suitable for power, communication, transportation and building systems.
6

Standard & Customizable: IEC compliant, supporting custom parameters and structures.