Doc. SIE62153
Rev. 1
Page 11/24
3.7 Low voltage outputs
The purpose of these low voltage outputs is to allow testing newest protection relays with low
voltage inputs, and to control the external boosters, thus providing the following features:
. to increase the power output, or:
. to control six currents or six voltages at the meantime.
A connector carries six analog signals, that correspond to the three voltages and to the three
currents. When the supplied male connector is fit into the socket, power outputs are automatically
cut.
- Number of outputs: 6.
- Connection: 23 way connector.
- Full range voltage output: 7.26 Vrms. *
- Full range current output: 0.726 or 7.26 Vrms. *
- Output current: 5 mA max.
- Resolution: 0.43 mV or 0.043 mV. *
- Accuracy: 0.1% of range. *
- Distortion: 0.1%. *
- Frequency bandwith
-
up to 10kHz for 6 channels
-
up to 20kHz for 3 channels: V1,V2 and I1. The others are disabled.
* In the range 40 to 60 Hz.
- Output accuracy; 0 to 40 Hz.: ± 0.2% of the regulated value ± 0.04% of the full scale range.
- 700 Hz maximum attenuation (300 V model): 1% (0,1 dB).
- 1 kHz maximum attenuation: 3% (0,3 dB).
- 2 kHz maximum attenuation: 5% (0,5 dB).
3.8 Time measurements
-
Digital inputs: 10 inputs, either clean or with voltage, from 4.5 to 600 V DC(24 to 425 V a.c.),
divided in two groups of five input each, with two common points isolated at 1 kVac. This
feature allows the measurement of polarized trip contacts with two different zeroes that can’t be
put in common. All of them perform time measurements; two (called IMP1 and IMP2) measure
also the time taken by a programmable number of impulses.
-
Connections: to safety banana sockets, marked C1 - C4 and IMP1; C5 - C8 and IMP2.
-
For each input, a light turns on when the input is closed (or the voltage applied).
-
Selection of the type of input: Voltage clean; 5 V; 24 V; 48 V; 100 V; software controlled. The
selection clean/voltage is displayed by two warning lights (one per group) : the light turns on if
the group is under voltage.
-
Input impedance: 1 MOhm.
-
Selection of the input debounce duration, from 0 us to 2 ms, in 64 steps of 32 us each, program
controlled.
-
For all selections, inputs are protected against voltages up to the maximum specified above.
-
Indication of the state of the inputs by lights mounted on the operator panel.
-
Selection N.O./N.C., independent for each input.
-
Time measurements available:
•
Timing from the start of the test (injection) until the change of state or the reset of the
selected input;
•
Timing from the change of state or the reset of an input in respect to any other input.
