本发明涉及一种用于植入连接待测试设备（例如保护计数器或继电器）和为待测设备供电的电源（例如测试设备的传感器）的电路中的测试块。 强度和/或电压传感器。 测试块包括具有多个内部电路的基座（10），该内部电路适于允许从电源向测试装置传输信息以及组装保护盖（11）。 与基座（10）可移除地形成封闭的外壳，内部电路容纳在该封闭的外壳中。 底座（10）和保护盖（11）构造成使得保护盖（11）的移除使得能够进入由基座（10）限定的接收位置（12）并且适于 通过插入独立于测试块并与包括电压表和/或电流表和/或虚拟电流源的测试设备电连接的测试插头（13）来接收。 还描述了一种测试装置。

Disclosed is a test block to be implanted into the circuit connecting a device under test such as a counter or a protection relay and a power source supplying the device under test such as a sensor intensity and / or voltage sensor. The test block comprises a base (10) having a plurality of internal electrical circuits capable of allowing transmission of information from the power source to the device under test and a protective cover (11) intended to be assembled with the base (10) detachably connected to form a closed chamber in which the internal electric circuits are housed. The base (10) and the protective cover (11) are configured such that removal of the protective cover (11) provides access to a receiving location (12) defined by the base (10) and adapted to host by plugging a test plug (13) independent of the test block and electrically connected to test equipment such as a voltmeter and / or an ammeter and / or a dummy current source. It is also described a test apparatus.