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The device for monitoring the insulation of UCI for circuits of constant and rectified current with a voltage of 220 V (for individual projects)
The device for monitoring the insulation of the ultrasonic inspection is intended for automatic monitoring of the insulation resistance of the poles of a network of a constant or rectified operating current of 220 V with respect to the "earth". And output the output signal when the insulation resistance drops below the permissible value.
Part number:
Description
The device uses digital microprocessor control.
The result of the control is obtained by calculating the total resistance of the circuit, which is a parallel connection of the insulation resistance of the positive and negative pole of the network with respect to the "ground".
The insulation level is estimated discretely, with five subbands with the following boundary values:
1. 100 — ∞ KOhm;
2. 50 — 100 KOhm;
3. 25 — 50 KOhm;
4. 10 — 25 KOhm;
5. 0 — 10 KOhm.
The accuracy of indication of the boundaries of the ranges is not lower than ± 20%.
The device responds to both asymmetrical and symmetrical reduction of insulation resistance of poles in the network. If the insulation resistance of the poles is asymmetrically lowered, the device provides an indication of the pole with reduced insulation. If the insulation resistance of the poles is symmetrically lowered, the device provides a blinking indication “+”, “-”.
The device is operable at a total capacitance of poles up to 50 uF and in the presence of interference up to 80 V 50 Hz.
In order to exclude the influence of transient processes when the device is switched on to the result of monitoring, the device has a delay of 5 to 10 seconds after power is applied.
In the event that the total insulation resistance is less than 20 kΩ, the output relay, the closing contact, used in the power-plant signaling scheme is activated. Accuracy of setting of the pickup resistance ≤ ±10 %.
The response time of the device to the contact closure is 5 to 20 seconds.
The device is powered by a controlled network of 220 V DC.
Permissible supply voltage deviations +10%, - 20%.
Power Consumption ≤ 25 Вт.
The device is manufactured in climatic versions of UHL and O categories of location 4 in accordance with GOST 15150.
The result of the control is obtained by calculating the total resistance of the circuit, which is a parallel connection of the insulation resistance of the positive and negative pole of the network with respect to the "ground".
The insulation level is estimated discretely, with five subbands with the following boundary values:
1. 100 — ∞ KOhm;
2. 50 — 100 KOhm;
3. 25 — 50 KOhm;
4. 10 — 25 KOhm;
5. 0 — 10 KOhm.
The accuracy of indication of the boundaries of the ranges is not lower than ± 20%.
The device responds to both asymmetrical and symmetrical reduction of insulation resistance of poles in the network. If the insulation resistance of the poles is asymmetrically lowered, the device provides an indication of the pole with reduced insulation. If the insulation resistance of the poles is symmetrically lowered, the device provides a blinking indication “+”, “-”.
The device is operable at a total capacitance of poles up to 50 uF and in the presence of interference up to 80 V 50 Hz.
In order to exclude the influence of transient processes when the device is switched on to the result of monitoring, the device has a delay of 5 to 10 seconds after power is applied.
In the event that the total insulation resistance is less than 20 kΩ, the output relay, the closing contact, used in the power-plant signaling scheme is activated. Accuracy of setting of the pickup resistance ≤ ±10 %.
The response time of the device to the contact closure is 5 to 20 seconds.
The device is powered by a controlled network of 220 V DC.
Permissible supply voltage deviations +10%, - 20%.
Power Consumption ≤ 25 Вт.
The device is manufactured in climatic versions of UHL and O categories of location 4 in accordance with GOST 15150.