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 Corded Mounting Type Cable Length Connection Type Width Height Depth Maximum Supported Cable Current Rating Minimum Supported Cable
RS庫存編號 458-926
HK$295.66
單位
- 240 V ac 4 → 7mm - - - - 60mm 48mm 127mm 7mm 13A 4mm
RS庫存編號 804-0766
製造零件編號1SNA166737R2000
BrandEssailec
HK$1,226.42
單位
- 400 V 0.34 → 10 (Wire Size) mm² - - - - 50mm 74mm 57mm 10 mm² 15A 0.34 mm²
RS庫存編號 804-0775
製造零件編號1SNA166625R2000
BrandEssailec
HK$1,128.97
單位
- 400 V 0.34 → 10 (Wire Size) mm² - - - - 50mm 74mm 57mm 10 mm² 15A 0.34 mm²
RS庫存編號 804-0810
製造零件編號1SNA166937R1100
BrandEssailec
HK$350.76
單位
- 400 V - - - - - 44mm 63mm 122mm - 8A -
RS庫存編號 804-0804
製造零件編號1SNA166627R2200
BrandEssailec
HK$747.19
單位
- 400 V 0.34 → 10 (Wire Size) mm² - - - - 50mm 74mm 57mm 10 mm² 8A 0.34 mm²
RS庫存編號 804-0778
製造零件編號1SNA166936R1000
BrandEssailec
HK$315.40
單位
- 400 V - - - - - 44mm 63mm 122mm - 15A -
RS庫存編號 804-0790
製造零件編號1SNA166747R0200
BrandEssailec
HK$998.41
單位
- 400 V 0.34 → 10 (Wire Size) mm² - - - - 50mm 74mm 57mm 10 mm² 8A 0.34 mm²
RS庫存編號 811-2274
BrandRS PRO
HK$529.62
單位
- 440 V ac - - - - - 100mm 49mm 160mm - 16A -
RS庫存編號 804-0750
製造零件編號1SNA 16623 R1200
BrandEssailec
HK$1,103.75
單位
- 400 V 0.34 → 10 (Wire Size) mm² - - - - 44mm 63mm 40mm 10 mm² 15A 0.34 mm²
RS庫存編號 827-041
HK$397.27
單位
- 240 V ac 4 → 7mm Yes - 1.5m - 60mm 48mm 127mm 7mm 5A 4mm
RS庫存編號 804-0788
製造零件編號1SNA166578R0100
BrandEssailec
HK$121.18
單位
- - - - - - - 49mm 73mm 30mm - - -
RS庫存編號 804-0794
製造零件編號1SNA166745R0000
BrandEssailec
HK$869.39
單位
- 400 V 0.34 → 10 (Wire Size) mm² - - - - 50mm 74mm 57mm 10 mm² 8A 0.34 mm²
RS庫存編號 804-0797
製造零件編號1SNA166743R0600
BrandEssailec
HK$886.14
單位
- 400 V 0.34 → 10 (Wire Size) mm² - - - - 50mm 74mm 57mm 10 mm² 8A 0.34 mm²
RS庫存編號 136-7886
製造零件編號CL1857
HK$348.40
單位
Mains Test Block Assembly 24 V dc, 250 V ac - - Base - Screw 130mm 50mm 60mm - 13A -
RS庫存編號 804-0813
製造零件編號1SNA167935R1000
BrandABB
HK$1,743.27
單位
- 400 V - - - - - 44mm 63mm 2232mm - 8A -
RS庫存編號 804-0826
製造零件編號1SNA166646R0500
BrandEssailec
HK$87.00
單位
- 400 V - - - - - 49mm 73mm 30mm - 8A -
RS庫存編號 804-0781
製造零件編號1SNA166638R0500
BrandEssailec
HK$2,966.39
單位
- 400 V - - - - - 44mm 63mm - - 15A -
RS庫存編號 804-0772
製造零件編號1SNA167937R0000
BrandEssailec
HK$1,162.35
單位
- 400 V - - - - - 44mm 63mm 55mm - 15A -
RS庫存編號 804-0807
製造零件編號1SNA166546R2100
BrandEssailec
HK$195.29
單位
- 400 V - - - - - 44mm - 83.5mm - 8A -
RS庫存編號 804-0762
製造零件編號1SNA 166 774 R0500
BrandEssailec
HK$503.29
單位
- 400 V Maximum of 2.5 mm² - - - - 22mm 63mm 75.5mm 2.5 mm² 8A -