- Country of manufactureRussia
SEW 1813 EL is intended for control of parameters of devices of protective shutdown and determination of their compliance to technical requirements. The measuring instrument of the UZO parameters is used at the enterprises and objects using the equipment working from the alternating current main. Periodic control of parameters of the protective equipment allows to prevent defeat of people electric current and other accidents in case of malfunctions of a network.
SEW 1813 EL measures three parameters:
- Value of differential current at which UZO works. It is measured ranging from 2ma to 999ma. At the same time quite low error of measurements a component ± is provided (1% + 1ma). Resolution of the device is equal 1ma.
- Time for which there is a shutdown of the device and respectively disconnection of an electric network. Working range lies ranging from 1 ms to 20s, and permission is equal to 1 ms. Maximum error of measurement ± (1% + 1 ms).
- Tension in a network at the moment, began testings. Range of the measured tension 50-450B with a frequency of 50 Hz, permission 1B, and an error ± (2% + 1B) and ± (5% + 1B) in the ranges of 50-350B and 350-450B respectively.
SEW 1813 EL has microprocessor management. There is a possibility of installation of values for an initial phase of carrying out testing and for differential current.
All measured values, and also level of the category of batteries are displayed on the two-lower case liquid crystal display, in each of ranks of which is available on 16 symbols.
Additional reliability of the device is provided with high-quality protection of the restrictive resistor against an overheat.
|The disconnecting differential current|
|Range of measurements||0... 999 ma|
|Installation of initial value diff. current||By means of a potentiometer|
|Error of measurements||± 1% + 1 ma|
|Initial phase of the test||Is chosen manually: 0 ° or 180 °|
|(a chain "a phase – the earth")|
|Polarity indication||Polarity of the wave which is switching off UZO is defined|
|Range of measurements||1 ms... 20 with|
|Error of measurements||± 1 ms + 1 ms|
|Tension in the tested chain|
|Range of working tension||50... 450 V, 50 Hz|
|Rated voltage (a phase – the earth)||110 … 317 V|
|The measured tension||value at the time of switching off of UZO: (1811 EL)|
|value at the time of the beginning of the test: (1813 EL)|
|Error of measurements||± 2% + 1 V for 50... 350 V|
|± 5% + 1 V for 350... 450 V:|
|Display||2-lower case ZhKI (2 x 16)|
|Service conditions||Minus 5 °C … 45 °C, otn. humidity <-80%|
|Supply voltage||1,5 B x 8 (AA type)|
|Overall dimensions||170 x 165 x 92 mm|
|Weight||apprx. 1,0 kg|
Standard complete set: Measuring wires (3 pieces), power supply (8 pieces), safety lock, shoulder strap, operation manual.