JL-400 undervoltage relay for cabinet installation of the power distribution system protection, such as: distribution cabinet, distribution box, electric control box, machine tools and other equipment. Can replace Siemens, Schneider, Jiale and Omron and other similar products. Not only has superior performance, but also has a high cost.
Undervoltage Relays Overview:
JL-400 undervoltage relay is a three-phase four-wire power protection device specially designed for the replacement of traditional analog electronic phase sequence protector. Is a multi-functional three-phase power supply system or three-phase electrical equipment monitoring and protection equipment. Using a high degree of integration of the microprocessor, the device has a simple, sophisticated, easy to use, anti-interference ability, high reliability characteristics. This product sets three-phase voltage display, over-voltage protection, under voltage protection, phase protection, three-phase voltage unbalance protection, phase protection, zero line protection in one. Display with high-definition ultra-wide temperature Chinese LCD screen, with full-featured, stable performance, display intuitive, easy to operate features.
JL-400 undervoltage relay for cabinet installation of the power distribution system protection, such as: distribution cabinet, distribution box, electric control box, machine tools and other equipment. Can replace Siemens, Schneider, Jiale and Omron and other similar products. Not only has superior performance, but also has a high cost.
Undervoltage relay Features:
High precision: the use of powerful microprocessor chip, in particular the use of AC sampling technology, voltage measurement accuracy of ± 1%, respectively, can display three-phase power phase voltage, the equivalent of three-phase digital voltmeter function.
Wide power frequency: can be applied to 45 ~ 65HZ, to ensure universal (can not be used in the inverter output circuit).
Wide power supply voltage: can be applied to phase voltage 150 ~ 300V (line voltage 260 ~ 520V), so that undervoltage relay specifications greatly reduced, user-friendly, while reducing a lot of spare parts funds.
High reliability: the use of a unique three-phase power supply technology, even in the very low voltage, even in the absence of the situation, but also to ensure protection, alarm, display the normal work function.
Zero line disconnection protection: the use of original technical solutions, double protection of the great damage to the zero line fault.
Independent of the normally open, normally closed output: the use of high-power dual-group contact relays, independent control of different voltage levels of equipment, more widely used.
Intuitive display: the use of special wide temperature high-definition Chinese liquid crystal display, the normal work shows three-phase power phase voltage; fault directly with the Chinese display fault causes, and can also prompt which phase failure, and failure voltage, Intuitive, easy to quickly determine the cause and location of the malfunction.
Fault record: the use of non-volatile storage technology, when overvoltage, undervoltage, phase loss, imbalance, phase sequence fault records, even if the product is completely power failure can remember the fault information, easy to query, Three fault messages.
Easy installation: the base of the track with two M4 screw hole structure, HT35 rail can be installed, can also be used M4 screw fixed, two kinds of installation, more flexible and convenient.
Undervoltage relay works:
Phase sequence monitoring: When the undervoltage relay is energized, the relay is engaged if the phase sequence is correct and all three phases are energized.
Overvoltage and undervoltage detection: Under normal operating conditions, the undervoltage relay is energized. If one of the three line voltages exceeds the monitoring range, the output relay is delayed and the overvoltage or undervoltage fault message is displayed. During the delay period, the fault message flashes; after the output relay is released, the fault message is long. When the voltage returns to the rated value, the relay is re-sucked according to the hysteresis value of 10V and the overvoltage or undervoltage fault message disappears. Set the button can enter 0.1s to 25s of the delay can be adjusted. The duration of the overvoltage or undervoltage must be greater than the measurement period (80 ms).
Phase detection: When the phase failure, the relay power. Normal operation (no fault) when the relay pull. When the phase is lost immediately.
Unbalanced detection: Under normal operating conditions, the output relay is engaged. When an imbalance occurs, after the set delay time after the action. The output relay is released and the screen shows an unbalanced fault.
Undervoltage relay technical parameters:
Input power: three-phase four-wire.
Power supply voltage range: phase voltage 150 ~ 300V AC 50HZ.
Voltage measurement range: phase voltage 150 ~ 300V AC.
Display: Ultra Wide Temperature Chinese LCD Display.
Output form: independent normally open, normally closed output.
Output load capacity: Resistive load: 5A / 250V AC, 5A / 30V DC; Inductive load: 1.5A / 250V AC, 1.5A / 30V DC.
Output contact Mechanical life:> 100,000 times.
Rated power consumption: 3VA.
Measurement error: less than 0.5% at full scale.
Dimensions: Length 64 × width 45 × height 53 mm.
Working environment: temperature -25 ℃ ~ 65 ℃, humidity <85%, no condensation. <p = “”>
Fault memory: three times

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