Typical equipment tested

We test a wide range of low and medium voltage electrical equipment such as low voltage switchboards, switchgear, transformers and insulators to name a few. Have a look below for details such as the typical standards, rated voltage and maximum test capacities for that type of equipment...

Low Voltage Switchboards

We test a wide variety of switchboards such as:  

  • Main switchboards up to 6000A
  • Distribution boards
  • Feeder Pillars
  • Consumer units
  • Busbar trunking systems

As switchboard designs vary a lot, it is essential that sketches of the test item be supplied so that we can determine the extent of testing that is required. Please provide drawings in Adobe PDF or AutoCAD format. (Black & white PDF is our preferred format).

The typical standards include:

Typical Standards Rated Voltage Maximum Test Current
IEC 61439-1, 2, 3, 4, 5, 6
BSEN 61439-1, 2, 3, 4, 5, 6
AS 3439-1, 2, 3
400 / 415 / 440 V
500 V
690 V
1000 V
150 kA for 1 second
100 kA for 3 seconds
50 kA for 3 seconds @ 690 V
32 kA for 1 second @ 1000 V

Low Voltage Switchgear

We test manufacturer’s air circuit breakers(ACB), moulded case circuit breakers(MCCB), fuse switches, disconnectors, automatic transfer switches(ATSE), motor starters and control devices, miniature circuit breakers(MCB), residual current devices(RCB) and residual current operated circuit breakers(RCOB).

Frequently manufacturers want to certify a range of equipment, i.e. a frame size. In this case we have to check each model within the frame size to confirm that we have a homogenous series and that there are no construction breaks. Construction breaks introduces additional testing and expense.

Typical standards include:

Typical StandardsRated VoltageMaximum Test Current
IEC 60947-1, 2, 3, 4
IEC 60898
IEC 61008
IEC 61009
AS 60947.1
AS 61008.1
AS 61009.1
230V 85 kA for 3 seconds
400 / 415 / 440V 150 kA for 1 second
100 kA for 3 seconds
500V 50 kA for 3 seconds
  1000V   32 kA for 1 second

High Voltage and Low Voltage Fuses

Typical StandardsRated ColtageMaximum Test Current
HV Fuses
IEC 60282-1, 2
AS 1033.1, 2
  Breaking Capacity
6.6 / 7.2 kV
11 / 12kV
13.2 / 14.4 kV
22 / 24 kV
  36 kA
26 kA
20 kA
13 kA
LV Fuses
IEC 60269-1, 2, 3
AS 60269-1, 2, 3
BS 88-1, 2, 3, 4
415 / 440 / 500 V
1000V
80 kA
32 kA

High Voltage Switchgear

We can test medium voltage switchgear assemblies and circuit breakers, Ring Main Units, Motor starters or combination units, earthing switches and disconnectors.

Typical StandardsRated ColtageMaximum Test Current
62271-100
62271-102
62271-105
62271-200
62271-203
IEC 62271-103
IEC 62271-106
Short-circuit making & breaking
6.6 / 7.2 kV 36 kA
11 / 12 kV 26 kA
13.2 / 14.4 kV 20 kA
22 / 24 kV 13 kA
Switching
Mainly Active 630 A
Capacitive 200 A

Transformers, Insulators and Arrestors

Typical StandardsRelevant Maximum Ratings
Current Transformers
IEC 6
BSEN 60044
AS 60044
  Short-time Current – 100 kA / 1s, 60 kA / 3s
Lightning Arrestors
IEC 60099
AS 1307
Pressure Relief, Power Arc up to 36 kA
Power Transformers
IEC 60076
AS 60076
BSEN 60076

AS 2374.1.2

Type tests up to 24 kV

Transformer Power Efficiency

Earthing Transformers and Reactors
IEC 60076.6
AS 60076.6
Full type tests up to 24 kV