LX-12/40.5 AMULATOR
Product Overview
LXQ-12/40.5 is a high-tech product specially developed to protect the resonance of voltage transformers. Used in 12KV neutral point ungrounded system, connected in series between the voltage transformer and the neutral point.
It can limit the overvoltage caused by ferromagnetic resonance, and limit the overcurrent flowing through the high voltage transformer when single-phase grounding or arc grounding. It is composed of large-capacity non-linear resistors, which has the characteristics of good heat dissipation performance, small size and large heat capacity, and can be applied to various voltage transformers
Main Technical Parameters
| NO. | Item | Technical parameters | ||||
| LXQ II-10（6） | LXQ(D) II-10（6） | LXQ II-35 | LXQ(D) II -35 | |||
| 1 | Voltage and resistance of a resistor at current AC 0.3mA(peak) | U 0.3mAp （V， peak） | 130±30 | 130±30 | 450±50 | 450±50 |
| R 0.3mAp （kΩ） | ＞ 450 | ＞ 450 | ＞ 1800 | ＞ 1800 | ||
| 2 | Voltage and resistance ofa resistor at current AC3mA(peak) | U 3mAp （V，peak） | 500±100 | 500±100 | 1400±150 | 1400±150 |
| R 3mAp （kΩ） | ＞ 180 | ＞ 180 | ＞ 550 | ＞ 550 | ||
|
3 |
Whether to limit the power frequency voltageat both ends of the resistor | No limit | Limit below3kV(peak) | No limit | Limit below3kV(peak) | |
|
4 |
Heating capacity through current 100 mA for 2 hours | ① No obvious damage;② Before and after the heat capacity test, the change of U 0.3mAp and U 3mAp ≤ ±5% | ||||
|
5 |
Heating capacity through current 500 mA for 2 10min | ① No obvious damage;② Before and after the heat capacity test, the change of U 0.3mAp and U 3mAp ≤ ±5% | ||||
Appearance And Installation Dimensions
Note 1: 6-10kV: H=150mm 35kV: H=210mm
Note 2: In the case of three single-phase voltage transformers (PT), the directly grounded high- voltage winding tail or (0) must be disconnected from the ground, and the resonance eliminator must be connected between the neutral point (0) and the ground, (neutral Point is no longer directly grounded).
Note 3: Three-phase five-column voltage transformer (PT), when connecting the resonance eliminator, the neutral point (0) must be disconnected from the ground, and the resonance eliminator must be connected between the neutral point (0) and the ground. The sex point is no longer directly grounded).