测试模块用于继电保护控制回路，与测试插头配合使用。可以快速地将继电保护装置的输入侧(电压、电流、辅助电源等)与出口回路(跳闸、信号等)进行隔离，并自动完成电流互感器侧二次电流回路短接，方便保护装置的校验。

主要特征：
测试盒设计有14个可配置的回路组合。
支持电流、电压、辅助电源、跳闸信号、保护装置测试信号回路。
电流回路支持自动短接功能。
双触点结构可降低把手快速插拔过程中短接回路瞬时开路风险。
内部接点可承受持续电流：20A。

The test block is designed for protection and control circuits and is used with a test plug. It rapidly isolates relay inputs (voltage, current, auxiliary supply,etc.) from output circuits (trip, signaling, etc.) and automatically short-circuits the CT secondary on the instrument-transformer side for safe relay testing.

Key Features：
Fourteen configurable circuit positions.
Supports current, voltage, auxiliary supply, trip, signaling, and relay test-signal circuits.
Automatic short-circuiting for CT current circuits.
Dual-contact construction reduces the risk of momentary opening of the CT shorting path during rapid plug insertion or withdrawal.
Continuous current withstand of internal contacts: 20 A.