Appliance / Machine / Switchboard Safety MACHINE AND SWITCHBOARD TESTERS
Glossary - Testing the safety of machines and switchboards Appliance
Functional test
A device, machine or piece of equipment especially an electrical one that is used in the house, for example a cooker or washing machine.
Machine A piece of equipment with several mov- ing parts which uses power to do a par- ticular type of work.
Switchgear
A switching / interrupting device used in connection with generation, trans- mission, distribution and conversion of electric power for controlling, metering protecting and regulating devices.
CE Marking
It is mandatory that any product sold in the European Union (EU) should have a CE label on it. The CE mark is a conform- ity mark which proves that a product has met all the health, safety and environ- mental requirements set out by Euro- pean Directives in order to ensure that the product is suitable for sale.
Discharge time
When a high powered appliance or ma- chine is powered up, the inductive and capacitive components within the device become charged. When the appliance or machine is switched off, people usually assume that the power will be immedi- ately discharged but this is not always the case. Inductive and capacitive com- ponents can hold their charge (even af- ter the power has been removed) which can prove dangerous for anybody who comes in contact with the appliance / machine / switchgear. The time it takes for an appliance to discharge can also change with time due to component degradation, impurities and pollution. The discharge time function on the Met- rel’s test instruments measure how long it takes for the device to discharge itself to a safe level of voltage.
3. 16
The functional test powers up an appli- ance to check that it works correctly. While doing this, the instrument can also measure a variety of different param- eters including voltage, current, power usage, cos ϕ and power factor.
Loop test
In order for a high powered machine or switchgear to discharge correctly and
for safety devices to act correctly and within the set time limits, it is important that the impedance of the fault loop (live to earth impedance) that supplies power to the device is adequate and appropriate. A loop test measures the amount of impedance in the wiring that supplies the device. Once measured, this can be compared to fault loop im- pedance limits set out in the appropri- ate regulations in order to ensure that the device is safe to use.
CE MultiTester integrated into the automated production line.
Accessories: page 3.26
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132 |
Page 133 |
Page 134 |
Page 135 |
Page 136 |
Page 137 |
Page 138 |
Page 139 |
Page 140 |
Page 141 |
Page 142 |
Page 143 |
Page 144 |
Page 145 |
Page 146 |
Page 147 |
Page 148 |
Page 149 |
Page 150 |
Page 151 |
Page 152 |
Page 153 |
Page 154 |
Page 155 |
Page 156 |
Page 157 |
Page 158 |
Page 159 |
Page 160 |
Page 161 |
Page 162 |
Page 163 |
Page 164 |
Page 165 |
Page 166 |
Page 167 |
Page 168 |
Page 169 |
Page 170 |
Page 171 |
Page 172 |
Page 173 |
Page 174 |
Page 175 |
Page 176