Mains Test Blocks

Mains test blocks are temporary power hubs where mains-powered equipment can be plugged into 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, testbeds 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 Voltage Rating Cable Entry Corded Cable Length Width Height Depth Maximum Supported Cable Current Rating Minimum Supported Cable
RS Stock No. 811-2274
BrandRS PRO
SGD105.06
Each
units
440 V ac - - - 100mm 49mm 160mm - 16A -
RS Stock No. 458-926
SGD51.51
Each
units
240 V ac 4 → 7mm - - 60mm 48mm 127mm 7mm 13A 4mm
RS Stock No. 399-6184
Mfr. Part No.CMCTV13A
SGD48.69
Each
units
- - - - - - - - - -
RS Stock No. 804-0813
Mfr. Part No.1SNA167935R1000
BrandABB
SGD294.41
Each
units
400 V - - - 44mm 63mm 2232mm - 8A -
RS Stock No. 804-0788
Mfr. Part No.1SNA166578R0100
BrandEssailec
SGD20.33
Each
units
- - - - 49mm 73mm 30mm - - -
RS Stock No. 399-6178
Mfr. Part No.CMCTVIEC
SGD79.96
Each
units
- - - - - - - - - -
RS Stock No. 804-0781
Mfr. Part No.1SNA166638R0500
BrandEssailec
SGD514.84
Each
units
400 V - - - 44mm 63mm - - 15A -
RS Stock No. 827-041
SGD62.22
Each
units
240 V ac 4 → 7mm Yes 1.5m 60mm 48mm 127mm 7mm 5A 4mm
RS Stock No. 804-0797
Mfr. Part No.1SNA166743R0600
BrandEssailec
SGD141.87
Each
units
400 V 0.34 → 10 (Wire Size) mm² - - 50mm 74mm 57mm 10 mm² 8A 0.34 mm²
RS Stock No. 804-0790
Mfr. Part No.1SNA166747R0200
BrandEssailec
SGD159.84
Each
units
400 V 0.34 → 10 (Wire Size) mm² - - 50mm 74mm 57mm 10 mm² 8A 0.34 mm²
RS Stock No. 804-0826
Mfr. Part No.1SNA166646R0500
BrandEssailec
SGD14.00
Each
units
400 V - - - 49mm 73mm 30mm - 8A -
RS Stock No. 804-0775
Mfr. Part No.1SNA166625R2000
BrandEssailec
SGD194.52
Each
units
400 V 0.34 → 10 (Wire Size) mm² - - 50mm 74mm 57mm 10 mm² 15A 0.34 mm²
RS Stock No. 804-0807
Mfr. Part No.1SNA166546R2100
BrandEssailec
SGD32.77
Each
units
400 V - - - 44mm - 83.5mm - 8A -
RS Stock No. 804-0804
Mfr. Part No.1SNA166627R2200
BrandEssailec
SGD156.33
Each
units
400 V 0.34 → 10 (Wire Size) mm² - - 50mm 74mm 57mm 10 mm² 8A 0.34 mm²
RS Stock No. 804-0778
Mfr. Part No.1SNA166936R1000
BrandEssailec
SGD56.16
Each
units
400 V - - - 44mm 63mm 122mm - 15A -
RS Stock No. 804-0750
Mfr. Part No.1SNA 16623 R1200
BrandEssailec
SGD200.33
Each
units
400 V 0.34 → 10 (Wire Size) mm² - - 44mm 63mm 40mm 10 mm² 15A 0.34 mm²
RS Stock No. 804-0794
Mfr. Part No.1SNA166745R0000
BrandEssailec
SGD130.36
Each
units
400 V 0.34 → 10 (Wire Size) mm² - - 50mm 74mm 57mm 10 mm² 8A 0.34 mm²
RS Stock No. 804-0810
Mfr. Part No.1SNA166937R1100
BrandEssailec
SGD56.16
Each
units
400 V - - - 44mm 63mm 122mm - 8A -
RS Stock No. 804-0772
Mfr. Part No.1SNA167937R0000
BrandEssailec
SGD200.95
Each
units
400 V - - - 44mm 63mm 55mm - 15A -
RS Stock No. 804-0766
Mfr. Part No.1SNA166737R2000
BrandEssailec
SGD205.97
Each
units
400 V 0.34 → 10 (Wire Size) mm² - - 50mm 74mm 57mm 10 mm² 15A 0.34 mm²
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