DL/T 724-2000 in English

1 Scope

This standard specifies the technical requirements and technical parameters for the operation and maintenance of battery DC power supply equipment (including batteries, charging equipment, and microcomputer monitors) for electric power system, and is applicable to the operation and maintenance of DC power supplies in various departments of electrical power system.

2 Normative references

The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, all the editions listed are valid. All standards are subject to revision, and all parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.

GB/T 2900.11-1988 Terminology of (secondary) cell or battery
GB/T 2900.33-1993 Electrotechnical terminology - Power electronics
DL/T 459-2000 Specifications for order of DC supply cabinet in power system

3 Terms

In addition to the terminologies specified in GB/T 2900.11 and GB/T 2900.33, the following ones are supplemented:

3.1

first charge

first charge of the new battery, which is performed before delivery to bring the battery into the state of charge, whose working procedure shall be performed in accordance with the manufacturer's instructions

3.2

constant current charge

charge with the charging current maintained constant within the charging voltage range

3.3

equalizing charge

charge which is carried out to compensate the uneven voltage of storage generated in the using process and recover the voltage to the specified range

3.4

constant-current limit voltage charge

charge which is carried out in a way with constant current first and, when terminal voltage of the battery pack rises to the limit value, in the way with constant voltage automatically switched to by the charging device until the charge is completed

3.5

floating charge

charge carried out with constant voltage by a charging device whose DC output terminal is always connected in parallel battery and load and which, in normal operation, carries out supplementary charge for battery while undertaking regular loads so as to supplement the self discharge of the battery and keep the battery pack ready for use in full capacity state

3.6

supplementary charge

charge regularly carried out according to the manufacturer's instructions to prevent the capacity from being gradually reduced or even damaged due to self discharge during the battery storage

3.7

constant current discharge

discharge of battery, in which process the discharge current value is always constant until the specified final voltage is reached

Foreword i
1 Scope
2 Normative references
3 Terms
4 General requirements
5 Basic parameters, technical indexes, handover acceptance and operational monitoring of DC power supply equipment
6 Operation and maintenance of battery
7 Operation and maintenance of the charging equipment
8 Function and operation & maintenance of microcomputer monitor in DC power supply equipment
Annex A (Informative) Sulfuric acid standard for lead-acid batteries
Annex B (Informative) Water standard for lead-acid batteries
Annex C (Informative) Electrolyte standard for alkaline batteries
Annex D (Informative) Technical conditions for potassium hydroxide
Annex E (Informative) Schematic diagram for operating state
Annex F (Informative) DC power supply measurement item for power plants and substations
Annex G (Informative) Record for 2V lead acid battery test
Annex H (Informative) Record for 2 V valve-regulated lead acid battery (VRLA battery) test
Annex I (Informative) Record for 12 V valve-regulated lead acid battery (VRLA battery) test