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| Measuring Circuit: | L1,L2,L3 | Rated Voltage: | 220VAC,380VAC ,440VAC 460VAV,480VAC,50/60Hz |
|---|---|---|---|
| Monitoring Functions: | Overvolatege, Undervoltage, Phase Unbalance | Indicators: | Overvolatege, Undervoltage, And Normal |
| Output Contacts: | 1 C/O | Contact Capacity: | 3A ,250VAC |
50/60 Hz Three Phase Voltage Monitoring Relay Unbalance 1 C/O Output
Three-phase imbalance: It means that the three-phase current (or voltage) amplitude is inconsistent in the power system, and the amplitude difference exceeds the specified range.
The solution to the three-phase imbalance of the power grid caused by an asymmetric load:
1 . Distribute asymmetrical loads at different power supply points to reduce the problem of excessively unbalanced degrees caused by concentrated connections.
2 . Use cross-equalization to distribute asymmetrical loads to each phase as much as possible to balance them.
3 . Increase the short-circuit capacity of the load access point, such as changing the network or increasing the power supply voltage level to improve the system's ability to withstand unbalanced loads.
4 , install the balance device. Listed briefly above are several technical measures to solve the hazards of three-phase voltage or current imbalance on the power grid and power quality.
Which specific measures should be adopted is more reasonable and effective, and it must be determined after implementation of technical and economic comparisons based on actual conditions.
In the low-voltage three-phase four-wire system for urban residents and rural power supply systems: As the power consumers are mostly single-phase loads or single-phase and three-phase loads are mixed, and the load size is different and the power consumption time is different. Therefore, the unbalanced current between the three phases in the power grid is objectively existent, and this kind of power imbalance situation has no regularity and cannot be foreseen in advance. This leads to a long-term imbalance in the three-phase load of the low-voltage power supply system. For three-phase unbalanced currents, the power sector has few effective solutions other than to distribute the load as much as possible.
♦ Features
-- Three-phase monitoring of phase loss, over- and undervoltage and phase unbalance
-- Powered by the measuring circuit
-- 1 C/O contact
-- 4 LEDs for status indication
♦ Protective Functions
-- Phase loss
-- Overvoltage
-- Undervoltage
-- Phase unbalance
♦ Typical Applications
• Pumps • Fans
• Blowers • Motors
• Compressors
♦ Approvals
• CE • CCC
♦ Technical data
| Type | JVR-382 |
| Measuring circuit | L1,L2,L3 |
| Rated voltage |
220VAC,380VAC ,440VAC 460VAV,480VAC,50/60Hz |
| Monitoring functions | phase loss, overvolatege, undervoltage, phase unbalance |
| Voltage setting range |
Type suffix overvoltage undervoltage blank +15% -15% A +10% -10% B +12.5% -10% C +15% -12.5% T Customized Customized |
| Indicators | phase loss, overvolatege, undervoltage, and normal |
| Output contacts | 1 C/O |
| Contact capacity | 3A ,250VAC |
| Dimensions (H x W x D) | 68×30×76mm |
| Mounting | DIN rail |
Contact Person: sales
Tel: +8613757785251
