Sign In | Join Free | My enlightcorp.com
China Wenzhou Ginri Power Automation Co., Ltd. logo
Wenzhou Ginri Power Automation Co., Ltd.
Wenzhou Ginri Power Automation Co., Ltd.
Active Member

8 Years

Home > Three Phase Voltage Monitoring Relay >

3 Phase 3 wire Three Phase Voltage Monitoring Relay under-voltage protective device

Wenzhou Ginri Power Automation Co., Ltd.
Contact Now

3 Phase 3 wire Three Phase Voltage Monitoring Relay under-voltage protective device

  • 1
  • 2

Brand Name : GINRI

Model Number : JVRD-380

Certification : CE,CCC

Place of Origin : CHINA

MOQ : 20Pcs

Payment Terms : L/C, T/T, Western Union,Paypal

Supply Ability : 20000Pcs per month

Delivery Time : 1-30 days upon order quatity

Packaging Details : Voltage relay is standard seaworthy package,1pcs individual box or 5pcs in a middle box, 200pcs per carton. Base quotation is blank package. OEM design is acceptable.

Function : Phase sequence, phase loss, overvoltage, undervoltage, phase unbalance

Indicators : 5LEDS

Rated Voltage : AC220V 380V 440V 460V 480V

Output Contact : 2C/O

Contact Capacity : 6A 250VAC

Mounting : Din Rail

Contact Now

3 Phase 3 wire Three Phase Voltage Monitoring Relay under-voltage protective device

In daily life, the loads we touch, such as electric lamps, televisions, refrigerators, fans and other household appliances and single-phase motors, are operated with two wires in the circuit, which are all single-phase loads. In the three-phase four-wire system, multiple single-phase loads should be connected as far as possible to the three-phase circuits, rather than being concentrated in one of the three circuits. If the impedance and the nature of the load connected to each of the three-phase circuits are the same, the loads in the three circuits are symmetric. Under load symmetry, because the phases of the phase currents differ from each other by 120°, the sum of the currents flowing through the neutral line at each moment is zero, and the neutral line is removed, and it is possible to supply power using a three-phase three-wire system.

However, in reality, the three-phase load formed by a plurality of single-phase loads connected to the three-phase circuit may not be completely symmetrical. The midline is particularly important in this case, not dispensable. The voltage across the load of each phase of the neutral line is always equal to the phase voltage of the power supply and will not change due to the asymmetry of the load and the change of the load, just as each phase of the power supply separately supplies the load of each phase separately. Can work properly. If there is no neutral line under the condition of asymmetric load, three-phase three-wire power supply with asymmetrical load is formed. Due to the asymmetry of the load impedance, the phase current is also asymmetric and the load phase voltage is naturally not symmetrical. Some phase voltages may exceed the rated voltage of the load, the load may be damaged (bulb burned), some phase voltages may be low, and the load may not work properly (bulbs dimmed). As in the figure, the load impedance of each phase changes due to lighting, turning off the lamp, and other factors. Both the phase current and the phase voltage change, the light turns on and off, and other electrical appliances cannot work properly or even become damaged.
Bad. It can be seen that in the three-phase four-wire power supply line, the neutral line plays a role in ensuring that the load phase voltage is symmetrical and unchanged. For an asymmetrical three-phase load, the neutral line cannot be removed, fuses or switches cannot be installed on the midline, and it is necessary to use The steel wire with better mechanical strength serves as the center line.

♦ Features

-- Compact modular size

-- Three-phase monitoring of phase sequence, phase loss, over- and undervoltage and phase unbalance

-- Powered by the measuring circuit

-- 2 C/O contacts

-- 5 LEDs for status indication

♦ Protective Functions

-- Phase sequence

-- Phase loss

-- Overvoltage

-- Undervoltage

-- Phase unbalance

♦ Typical Applications

• Pumps • Fans

• Blowers • Motors

• Compressors

♦ Approvals

• CE • CCC

♦ Technical data

Type JVRD-380
Measuring circuit L1,L2,L3
Rated voltage

220VAC,380VAC,440VAC

460VAC,480VAC,50/60Hz

Monitoring functions

phase sequence,phase loss,overvoltage,

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
Indicators

phase sequence,phase loss,overvoltage,

undervoltage and normal

Output contacts 2 C/O
Contact capacity 6A,250VAC
Dimensions(H*W*D) 79*23*79mm
Mounting DIN Rail

3 Phase 3 wire Three Phase Voltage Monitoring Relay under-voltage protective device


Product Tags:

3 phase undervoltage relay

      

3 phase monitoring relay

      
Quality 3 Phase 3 wire Three Phase Voltage Monitoring Relay under-voltage protective device for sale

3 Phase 3 wire Three Phase Voltage Monitoring Relay under-voltage protective device Images

Inquiry Cart 0
Send your message to this supplier
 
*From:
*To: Wenzhou Ginri Power Automation Co., Ltd.
*Subject:
*Message:
Characters Remaining: (0/3000)