GB/T 21711.10-2025 in English
VALIDElectromechanical elementary relays—Part 10: Additional functional aspects and safety requirements for high-capacity relays
- Issued on:2025-05-30
- Implemented on:2025-05-30
- File Format:PDF
- Delivery:Via email within 10 business days
$903.00
| Standard No: | GB/T 21711.10-2025 |
| Document status: | VALID |
| Title in English: | Electromechanical elementary relays—Part 10: Additional functional aspects and safety requirements for high-capacity relays |
| Title in Chinese: | 基础机电继电器 第10部分：大容量继电器附加功能特性和安全要求 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 10 business days |
| Issued on: | 2025-05-30 |
| Implemented on: | 2025-05-30 |
| Chinese Classification: | L25-Relay and chopper |
| Professional Classification: | GB-National Standard |
| Related Keywords: | electromechanical elementary relays
large-capacity electromechanical relays gas-filled relays high-capacity relays introduction overview safety requirements |
| Related Topics: | Relay Standard
|
《GB/T 21711.10-2025基础机电继电器 第10部分：大容量继电器附加功能特性和安全要求》由TC217（全国电气继电器标准化技术委员会）归口，主管部门为工业和信息化部（电子）。
Introduction
Overview of core content
This standard applies to large-capacity electromechanical relays in the fields of smart grids, electric vehicles, etc., and specifies special design requirements such as breaking capacity and arc control. The main technological breakthroughs include:
| Key indicators | Conventional relays | Large capacity relays |
|---|---|---|
| Maximum contact current | ≤400A | 1000A |
| Insulation voltage level | 300V | 1500V(DC) |
| Electrical endurance cycle | 50,000 times | 300,000 times |
Innovation in safety requirements
13.6 System Insulation EvaluationThe statistical evaluation method for gas-filled relays is introduced for the first time, requiring the partial discharge limit to be ≤5pC (when the peak voltage is >700V)
Contact Polarity IdentificationThe +/- polarity of DC applications must be marked (Clause 3.5.23)
Special Application Tests
Photovoltaic System Relays
Annex S stipulates that the following must be passed:
- Critical DC load test (4-63A gradient test)
- Insulation verification at an altitude of 2000m
- 50 temperature cycles (-40℃~85℃)
Road Vehicle Relays
Annex T requires:
- Supply voltage instantaneous drop test (Figure T.1)
- 32h random vibration (57.9m/s² RMS)
- 500m/s² mechanical shock
Implementation recommendations
- The contact material selection must meet the failure judgment criteria of 11.3 Severity Level A
- The lead-out terminal design should comply with the mechanical strength requirements of Table P.1
- The destructive discharge voltage U50 of the gas-filled relay should be calculated according to Formula (1)
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