SNP-2313H ABB微机保护继电器是一款功能强大的综合保护装置，适用于66kV及以下电压等级的经消弧线圈接地或不接地系统中的进线、馈线保护。以下是关于SNP-2313H ABB微机保护继电器的详细解析：

一、适用范围与安装

• 适用于66kV及以下电压等级的系统中，可用于进线、馈线保护。
• 可集中组屏，也可在开关柜就地安装，全面支持变配电所综合自动化系统。

二、功能及特点

1. 保护功能

• 三相三段式方向电流保护：包括速断、限时速断、过流反时限，并带有低电压闭锁功能。
• 三相三次重合闸：支持检无压、检同期、不检等模式，重合次数可设定，带后加速功能。
• 零序电压闭锁方向零序过流保护：具有报警和跳闸选择功能。
• 其他保护功能：包括小电流接地选线功能、低电压保护、低频减载保护、过负荷告警等。

2. 辅助功能

• 告警功能：包括PT断线告警、母线接地告警、装置故障告警等。
• 整定与诊断：支持保护定值和时限的独立整定，具有自检和自诊断功能。

3. 测控功能

• 电量测量：可测量电压、电流、有功功率、无功功率、功率因数、电网频率等。
• 信号检测：装置共有8路开入量，用于检测各种信号。

三、技术特点

• 设计先进：采用分层分布式设计，可组屏安装或直接安装于开关柜上。
• 抗干扰能力强：封闭、加强型单元机箱，抗强干扰设计，适用于恶劣环境。
• 安全性高：设有独立的起动元件用来开放继电器电源，提高装置的安全性。
• 记录与显示：可记录64次SOE事件，采用汉字液晶显示，键盘操作方便。

四、基本原理

SNP-2313H微机保护继电器的工作原理主要基于电流速断、限时速断、过流保护等原理。当A、C（或A、B、C）相电流基波最大值达到整定值时，定时器启动。若持续到整定时限且相应保护的投退控制字处于投入状态，装置则发出跳闸控制信号，并记录和上传相应的SOE事件。

The SNP-2313H ABB Microcomputer protection relay is a powerful and comprehensive protection device for inlet and feeder protection in grounded or ungrounded systems with arc suppression coils at voltages up to and including 66kV. The following is a detailed analysis of the SNP-2313H ABB microcomputer protection relay:

Scope of application and installation

Suitable for 66kV and below voltage level of the system, can be used for incoming line, feeder protection.

Can be centralized panel, can also be installed in the switch cabinet, fully support the power distribution office integrated automation system.

2. Functions and characteristics

1. Protection function

Three-phase three-stage directional current protection: including speed break, speed limit break, overcurrent reverse time, and with low voltage lock function.

Three-phase three times reclosing: support no voltage, check the same period, non-check and other modes, the number of coincidence can be set, with post-acceleration function.

Zero sequence voltage blocking direction zero sequence overcurrent protection: with alarm and trip selection function.

Other protection functions include low-current grounding line selection, low-voltage protection, low-frequency load reduction protection, and overload alarm.

2. Auxiliary functions

Alarm functions include PT disconnection alarm, busbar grounding alarm, and device fault alarm.

Setting and diagnosis: Support independent setting of protection values and time limits, with self-check and self-diagnosis functions.

3. Measurement and control function

Power measurement: can measure voltage, current, active power, reactive power, power factor, grid frequency, etc.

Signal detection: The device has a total of 8 channels for detecting various signals.

3. Technical characteristics

Advanced design: layered distributed design, can be installed on the panel or directly installed on the switch cabinet.

Strong anti-interference ability: closed, reinforced unit chassis, anti-interference design, suitable for harsh environments.

High safety: an independent starting element is provided to open the relay power supply to improve the safety of the device.

Record and display: can record 64 SOE events, using Chinese LCD display, keyboard operation is convenient.

4. Basic Principles

The working principle of SNP-2313H microcomputer protection relay is mainly based on the principle of current breaking, limiting speed breaking, overcurrent protection and so on. When the maximum value of A, C (or A, B, C) phase current fundamental wave reaches the setting value, the timer starts. If it continues until the setting time and the corresponding protected back-off control word is engaged, the device sends a trip control signal and records and uploads the corresponding SOE event.