Mains Test Blocks

Mains test blocks are temporary power hubs where mains-powered equipment can be plugged in to test equipment. These blocks are also used to test the current and voltage levels of power circuits.

Mains test blocks have plug-and-play attributes where the current can be tested without cutting the power supply. The test blocks operate on a make-before-break principle where the short-circuiting of the current transformers automatically occurs without requiring a switch for manual operation.


What are mains test blocks used for?

Mains test blocks are used for the testing of machinery to prevent damage to equipment if there are faulty currents or wires. These blocks are often used in laboratories, test beds and service areas.

Mains test blocks are used in transformers to test protection relays of secondary circuits. Test blocks are also applied to utility components to validate meter readings and calibrations. In factories, mains test blocks are also used to repair and replace equipment without having to disconnect or modify the power cable attached.

Types of mains test blocks

Mains test blocks are categorised by voltage, rating, connection type and pole count.


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Description Price Type Voltage Rating Cable Entry Circuit Type Contact Configuration Corded Mounting Type Cable Length Connection Type Width Height Depth Colour Maximum Supported Cable
RS Stock No. 181-0479
Mfr. Part No.1SNA166888R2100
BrandEntrelec
kr 457,52
Each
Units
Protecting Cover - - - - - DIN Rail Mount - - 49mm 73mm 30mm - -
RS Stock No. 804-0766
Mfr. Part No.1SNA166737R2000
BrandEssailec
kr 1 825,82
Each
Units
- 400 V 0.34 → 10 (Wire Size) mm² - - - - - - 50mm 74mm 57mm - 10 mm²
RS Stock No. 804-0772
Mfr. Part No.1SNA167937R0000
BrandEssailec
kr 1 692,65
Each
Units
- 400 V - - - - - - - 44mm 63mm 55mm - -
RS Stock No. 399-6178
Mfr. Part No.CMCTVIEC
kr 455,13
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 804-0826
Mfr. Part No.1SNA166646R0500
BrandEssailec
kr 119,81
Each
Units
- 400 V - - - - - - - 49mm 73mm 30mm - -